10-Q

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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  ------------


                                    FORM 10-Q


       QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
                              EXCHANGE ACT OF 1934

                  For the quarterly period ended March 31, 2005

                                  ------------


                        Commission file number 001-31539

                     ST. MARY LAND & EXPLORATION COMPANY
             (Exact name of registrant as specified in its charter)


             Delaware                                  41-0518430
  (State or other jurisdiction            (I.R.S. Employer Identification No.)
of incorporation or organization)

             1776 Lincoln Street, Suite 700, Denver, Colorado 80203
               (Address of principal executive offices) (Zip Code)

                                 (303) 861-8140
              (Registrant's telephone number, including area code)




Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.
Yes [ x ]     No [   ]

Indicate by check mark  whether the  registrant  is an  accelerated  filer
(as defined by Rule 12b-2 of the Exchange  Act).  Yes [ x ] No [   ]

Indicate the number of shares outstanding of each of the issuer's classes of
common stock as of the latest practicable date.


As of April 22, 2005, the registrant had 57,239,058 shares of common stock,
$0.01 par value, outstanding.

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                     ST. MARY LAND & EXPLORATION COMPANY
                     ---------------------------------------
                                      INDEX
                                      -----
Part I. FINANCIAL INFORMATION                                              PAGE
                                                                           ----

        Item 1. Financial Statements (Unaudited)

                Consolidated Balance
                Sheets - March 31, 2005 and
                December 31, 2004..............................................3

                Consolidated Statements of
                Operations - Three Months Ended
                March 31, 2005 and 2004........................................4

                Consolidated Statements of
                Stockholders' Equity and
                Comprehensive Income - March 31, 2005
                and December 31, 2004..........................................5

                Consolidated Statements of
                Cash Flows - Three Months Ended
                March 31, 2005 and 2004........................................6

                Notes to Consolidated Financial
                Statements - March 31, 2005....................................8

        Item 2. Management's Discussion and Analysis
                of Financial Condition and Results
                of Operations.................................................20

        Item 3. Quantitative and Qualitative Disclosures
                About Market Risk (included within
                the content of Item 2)........................................34

        Item 4. Controls and Procedures.......................................34

Part II.OTHER INFORMATION

        Item 1. Legal Proceedings.............................................34

        Item 6. Exhibits......................................................35





PART I.   FINANCIAL INFORMATION

ITEM 1.   FINANCIAL STATEMENTS

                   ST. MARY LAND & EXPLORATION COMPANY AND
                    SUBSIDIARIES CONSOLIDATED BALANCE SHEETS
                                   (UNAUDITED)
                      (In thousands, except share amounts)

                                                                               March 31,        December 31,
                                                                             -------------      -------------
                                ASSETS                                           2005               2004
                                                                             -------------      -------------
Current assets:
  Cash and cash equivalents                                                  $    17,520        $     6,418
  Short-term investments                                                           1,500              1,412
  Accounts receivable                                                             96,669            104,964
  Prepaid expenses and other                                                       7,466              5,863
  Deferred income taxes                                                            7,615                  -
  Accrued derivative asset                                                           127              8,270
                                                                             -------------      -------------
        Total current assets                                                     130,897            126,927
                                                                             -------------      -------------
Property and equipment (successful efforts method), at cost:
  Proved oil and gas properties                                                1,211,911          1,124,810
  Less - accumulated depletion, depreciation and amortization                   (415,805)          (399,013)
  Unproved oil and gas properties, net of impairment allowance
        of $8,873 in 2005 and $9,867 in 2004                                      44,961             41,969
  Wells in progress                                                               36,348             35,515
  Other property and equipment, net of accumulated depreciation
        of $6,803 in 2005 and $6,459 in 2004                                       5,167              5,244
                                                                             -------------      -------------
                                                                                 882,582            808,525
                                                                             -------------      -------------
Noncurrent assets:
  Goodwill                                                                         9,612                  -
  Other noncurrent assets                                                          5,544             10,008
                                                                             -------------      -------------
        Total noncurrent assets                                                   15,156             10,008
                                                                             -------------     -------------


                                                                             -------------      -------------
Total Assets                                                                 $ 1,028,635        $   945,460
                                                                             =============      =============

                      LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable and accrued expenses                                      $   110,415        $   110,117
  Accrued derivative liability                                                    21,330              2,502
  Deferred income taxes                                                              111              2,273
                                                                             -------------      -------------
        Total current liabilities                                                131,856            114,892
                                                                             -------------      -------------
Noncurrent liabilities:
  Long-term credit facility                                                       47,000             37,000
  Convertible notes                                                               99,814             99,791
  Asset retirement obligation                                                     43,462             40,911
  Net Profits Plan liability                                                      34,782             30,561
  Deferred income taxes                                                          153,724            129,830
  Other noncurrent liabilities                                                    17,707              8,020
                                                                             -------------      -------------
        Total noncurrent liabilities                                             396,489            346,113
                                                                             -------------      -------------
Commitments and contingencies

Stockholders' equity:
  Common stock, $0.01 par value: authorized  - 100,000,000 shares;
        issued:  57,732,758 shares in 2005 and 57,458,246 shares in 2004;
        outstanding, net of treasury shares:  57,232,758 shares in 2005
        and 56,958,246 shares in 2004                                                577                574
  Additional paid-in capital                                                     135,963            127,374
  Treasury stock, at cost:  500,000 shares in 2005 and 2004                       (5,295)            (5,295)
  Deferred stock-based compensation                                               (8,088)            (5,039)
  Retained earnings                                                              396,808            364,567
  Accumulated other comprehensive income (loss)                                  (19,675)             2,274
                                                                             -------------      -------------
        Total stockholders' equity                                               500,290            484,455
                                                                             -------------      -------------
Total Liabilities and Stockholders' Equity                                   $ 1,028,635        $   945,460
                                                                             =============      =============

                  The accompanying notes are an integral part
                  of these consolidated financial statements.

                                      -3-



            ST. MARY LAND & EXPLORATION COMPANY AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)
                    (In thousands, except per share amounts)

                                                                               For the Three Months Ended
                                                                                        March 31,
                                                                             -------------------------------
                                                                                  2005               2004
                                                                             ------------       ------------
Operating revenues:
  Oil and gas production revenue                                             $   138,370        $   101,206
  Oil and gas hedge gain (loss)                                                    1,560             (8,599)
  Marketed gas revenue                                                             3,396              3,573
  Gain on sale of proved properties                                                    -                195
  Other revenue                                                                      492                107
                                                                             ------------       ------------
        Total operating revenues                                                 143,818             96,482
                                                                             ------------       ------------
Operating expenses:
  Oil and gas production expense                                                  32,159             23,543
  Depletion, depreciation, amortization
        and abandonment liability accretion                                       30,074             20,626
  Exploration                                                                      7,083              4,631
  Abandonment and impairment of unproved properties                                1,870                922
  General and administrative                                                       5,986              5,577
  Change in Net Profits Plan liability                                             4,221              2,160
  Marketed gas operating expense                                                   3,125              3,411
  Derivative loss (gain)                                                           1,129               (852)
  Other expense                                                                      514                585
                                                                             ------------       ------------
        Total operating expenses                                                  86,161             60,603
                                                                             ------------       ------------
Income from operations                                                            57,657             35,879

Nonoperating income (expense):
  Interest income                                                                     82                144
  Interest expense                                                                (1,944)            (1,488)
                                                                             ------------       ------------
Income before income taxes                                                        55,795             34,535
Income tax expense                                                               (20,692)           (13,086)
                                                                             ------------       ------------
Net Income                                                                   $    35,103        $    21,449
                                                                             ============       ============

Basic weighted-average common shares outstanding                                  57,231             59,549
                                                                             ============       ============
Diluted weighted-average common shares outstanding                                67,047             68,383
                                                                             ============       ============

Basic net income per common share                                            $      0.61        $      0.36
                                                                             ============       ============
Diluted net income per common share                                          $      0.54        $      0.33
                                                                             ============       ============

                  The accompanying notes are an integral part
                  of these consolidated financial statements.

                                      -4-


            ST. MARY LAND & EXPLORATION COMPANY AND SUBSIDIARIES
 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND COMPREHENSIVE INCOME (UNAUDITED)
                      (In thousands, except share amounts)


                                                                                                          Accumulated
                               Common Stock      Additional    Treasury Stock       Deferred                 Other        Total
                             -------------------   Paid-in   -------------------  Stock-Based  Retained  Comprehensive Stockholders'
                                 Shares   Amount   Capital     Shares    Amount   Compensation Earnings  Income (Loss)    Equity
                             ----------- ------- ----------  ---------  --------  ------------ -------- -------------- -------------

Balances, December 31, 2003  58,490,246  $  584  $146,070  (2,005,400)  $(16,057) $         -  $274,937  $    (14,881) $   390,653

Comprehensive income,
        net of tax:
  Net income                          -       -         -           -          -            -    92,479             -       92,479
  Change in derivative
    instrument fair value             -       -         -           -          -            -         -       (14,795)     (14,795)
  Reclassification to earnings        -       -         -           -          -            -         -        31,849       31,849
  Minimum pension liability
    adjustment                        -       -         -           -          -            -         -           101          101
                                                                                                                       -------------
Total comprehensive income                                                                                                 109,634
                                                                                                                       -------------
Cash dividends declared,
  $ 0.05 per share                    -       -         -           -          -            -    (2,849)            -       (2,849)
Repurchase of common stock
  from Flying J                       -       -   (19,406)          -          -            -         -             -      (19,406)
Treasury stock purchases              -       -         -    (978,600)   (16,336)           -         -             -      (16,336)
Retirement of treasury stock (2,458,800)    (24)  (26,725)  2,458,800     26,749            -         -             -            -
Issuance of common stock
  under Employee Stock
  Purchase Plan                  27,748       -       375           -          -            -         -             -          375
Sale of common stock,
  including income  tax
  benefit of stock
  option exercises            1,399,052      14    17,832           -          -            -         -             -       17,846
Deferred compensation related
  to issued  restricted stock
  unit awards, net
  of forfeitures                      -       -     8,122           -          -       (8,122)        -             -            -
Accrued stock-based
  compensation                        -       -     1,106           -          -            -         -             -        1,106
Amortization of deferred
  stock-based compensation            -       -         -           -          -        3,083         -             -        3,083
Directors' stock compensation         -       -         -      25,200        349            -         -             -          349
                             ----------- ------- ----------  ---------  --------  ------------ --------  ------------- -------------

Balances, December 31, 2004  57,458,246  $  574  $127,374    (500,000)  $ (5,295) $    (5,039) $364,567  $      2,274  $   484,455
                             ----------- ------- ----------  ---------  --------  ------------ --------  ------------- -------------

Comprehensive income,
        net of tax:
  Net income                          -       -         -           -          -            -    35,103             -       35,103
  Change in derivative
  instrument fair value               -       -         -           -          -            -         -      (20,967)      (20,967)
  Reclassification to earn            -       -         -           -          -            -         -         (982)         (982)
                                                                                                                       -------------
Total comprehensive income                                                                                                  13,154
                                                                                                                       -------------
Cash dividends declared,
  $ 0.05 per share                    -       -         -           -          -            -    (2,862)            -       (2,862)
Sale of common stock,
  including income tax
  benefit of stock
  option exercises              274,512       3     4,504           -          -            -         -             -        4,507
Deferred compensation related
  to issued restricted stock
  unit awards, net
  of forfeitures                      -       -     4,811           -          -       (4,811)        -             -            -
Accrued stock-based
  compensation                        -       -      (726)          -          -            -         -             -         (726)
Amortization of deferred
  stock-based compensation            -       -         -           -          -        1,762         -             -        1,762
                             ----------- ------- ----------  ---------  --------  ------------ --------  ------------- -------------

Balances, March 31, 2005     57,732,758  $  577  $135,963    (500,000)  $ (5,295) $    (8,088) $396,808  $    (19,675) $   500,290
                             =========== ======= ==========  =========  ========  ============ ========  ============= =============

                  The accompanying notes are an integral part
                  of these consolidated financial statements.

                                      -5-



            ST. MARY LAND & EXPLORATION COMPANY AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
                                 (In thousands)

                                                                               For the Three Months Ended
                                                                                         March 31,
                                                                               --------------------------
                                                                                  2005           2004
Reconciliation of net income to net cash provided                              ----------     -----------
      by operating activities:
  Net income                                                                   $  35,103      $   21,449
  Adjustments to reconcile net income to net
        cash provided by operating activities:
      Gain on sale of proved properties                                                -            (195)
      Depletion, depreciation, amortization
        and abandonment liability accretion                                       30,074          20,626
      Exploratory dry hole expense                                                   200              44
      Abandonment and impairment of unproved properties                            1,870             922
      Unrealized derivative (gain) loss                                            1,129            (852)
      Change in Net Profits Plan liability                                         4,221           2,160
      Deferred and accrued stock-based compensation                                1,036               -
      Income tax benefit from the exercise of stock options                        1,225               -
      Deferred income taxes                                                       13,740           8,645
      Other                                                                        1,046             159
  Changes in current assets and liabilities:
      Accounts receivable                                                         11,161          (5,292)
      Prepaid expenses and other                                                  (1,603)            702
      Accounts payable and accrued expenses                                       (7,071)         (8,450)
                                                                               ----------     -----------
  Net cash provided by operating activities                                       92,131          39,918
                                                                               ----------     -----------
  Cash flows from investing activities:
      Proceeds from sale of oil and gas properties                                    45             483
      Capital expenditures                                                       (63,307)        (42,482)
      Acquisition of oil and gas properties, net of cash received                (34,738)           (522)
      Deposits to short-term investments available-for-sale                       (1,502)              -
      Receipts from short-term investments available-for-sale                      1,402           1,000
      Other                                                                        3,822              49
                                                                               ----------     -----------
  Net cash used in investing activities                                          (94,278)        (41,472)
                                                                               ----------     -----------
  Cash flows from financing activities:
      Proceeds from credit facility                                               66,967          76,497
      Repayment of credit facility                                               (57,000)        (56,500)
      Proceeds from sale of common stock for exercise of stock options             3,282           3,942
      Repurchase of common stock                                                       -         (19,406)
                                                                               ----------     -----------
  Net cash provided by financing activities                                       13,249           4,533
                                                                               ----------     -----------
  Net change in cash and cash equivalents                                         11,102           2,979
  Cash and cash equivalents at beginning of period                                 6,418          14,827
                                                                               ----------     -----------
  Cash and cash equivalents at end of period                                   $  17,520      $   17,806
                                                                               ==========     ===========

                  The accompanying notes are an integral part
                  of these consolidated financial statements.

                                      -6-



            ST. MARY LAND & EXPLORATION COMPANY AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
                                   (Continued)



Supplemental schedule of additional cash flow information and noncash investing
and financing activities:

                                                                          For the Three Months Ended
                                                                                  March 31,
                                                                          --------------------------
                                                                            2005              2004
                                                                          --------          --------
                                                                                (In thousands)

Cash paid for interest, including amounts capitalized                     $  3,549          $  3,778

Cash paid for income taxes                                                $  6,017          $  9,883



In March 2005 the Company issued 194,508 restricted stock units pursuant to the
Company's restricted stock plan. The total value of the grant was $4.9 million.
As of March 31, 2005, the Company has recorded $1.3 million of compensation
expense related to this grant.

In January 2004 the Company issued a total of 8,400 shares of common stock from
treasury to its non-employee directors pursuant to the Company's non-employee
director stock compensation plan. The Company recorded compensation expense of
$64,260 for the first quarter of 2004.

                  The accompanying notes are an integral part
                  of these consolidated financial statements.

                                      -7-



            ST. MARY LAND & EXPLORATION COMPANY AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                   (UNAUDITED)
                           --------------------------

                                 March 31, 2005

Note 1 - The Company and Business

         St. Mary Land & Exploration Company ("St. Mary" or the "Company")
is an independent energy company engaged in the exploration, exploitation,
development, acquisition and production of natural gas and crude oil. The
Company's operations are conducted entirely in the continental United States.

Note 2 - Basis of Presentation and Significant Accounting Policies

Basis of Presentation

         The accompanying unaudited condensed consolidated financial statements
of St. Mary have been prepared in accordance with accounting principles
generally accepted in the United States for interim financial information. They
do not include all information and notes required by generally accepted
accounting principles for complete financial statements. However, except as
disclosed herein, there has been no material change in the information disclosed
in the notes to consolidated financial statements included in St. Mary's Annual
Report on Form 10-K for the year ended December 31, 2004. In the opinion of
management, all adjustments (consisting of normal recurring accruals) considered
necessary for a fair presentation of the interim financial information have been
included. Operating results for the periods presented are not necessarily
indicative of the results that may be expected for the full year.

         Certain amounts in the 2004 unaudited condensed financial statements
have been reclassified to conform to the 2005 unaudited condensed financial
statement presentation. The non-cash portion of Net Profits Interest Bonus Plan
(the "Net Profits Plan") expense and the corresponding liability have been
reclassified as separate line items in the accompanying financial statements for
all periods presented. As a result, prior period general and administrative
expense, exploration expense and other non-current liabilities have been
reclassified to conform to the current presentation. Additionally, wells in
progress have been classified as a separate line item in the consolidated
balance sheets for all periods presented. As a result, prior period unproved oil
and gas properties, net of impairment allowance, have been reclassified to
conform to the current presentation.

Stock Dividend

         In March 2005 the Company's Board of Directors approved a two-for-one
stock split in the form of a stock dividend whereby one additional common
share of stock was distributed for each common share outstanding. The stock
dividend was distributed on March 31, 2005, to shareholders of record as of the
close of business on March 21, 2005. All share and per share amounts for all
periods presented herein have been restated to reflect this stock split.

Goodwill

         Goodwill is recorded in the Company's consolidated balance sheets as a
result of the acquisition of Agate Petroleum, Inc. in January 2005. Goodwill is
reviewed for impairment annually or more frequently if impairment indicators
arise.

                                      -8-



Other Significant Accounting Policies

         The accounting policies followed by the Company are set forth in Note 1
to the Company's consolidated financial statements in the Form 10-K for the year
ended December 31, 2004. It is suggested that these unaudited condensed
consolidated financial statements be read in conjunction with the consolidated
financial statements and notes included in the Form 10-K.

Note 3 - Acquisition of Agate Petroleum, Inc.

         On January 5, 2005, the Company acquired Agate Petroleum, Inc.
("Agate") in exchange for $39.9 million in cash. The preliminary purchase price
has been allocated based on the fair values of the acquired assets and
liabilities as estimated at closing. The final purchase price allocation will
not be finalized until all amounts related to receivables and payables are
determined with certainty. The Company expects that this allocation will be
completed prior to the end of 2005 and will not result in any material
adjustments to the preliminary purchase price. The Company acquired $4.6 million
in cash from Agate, and the allocation of the purchase price resulted in the
recording of $41.9 million to proved and unproved oil and gas properties, $1.2
million to net current liabilities, $9.6 million to goodwill, a deferred income
tax liability of $13.6 million and a $1.4 million asset retirement obligation.
The acquisition was accounted for using the purchase method of accounting and
was funded with cash on hand and borrowings under the Company's existing credit
facility. Operating results from the acquired properties have been included in
the consolidated statements of operations only from the date of closing.

        The goodwill and deferred income tax liability resulted from acquiring
oil and gas assets in the transaction with a tax basis that is lower than the
allocated fair value book basis because present value considerations cannot be
applied to the amounts recorded for deferred income taxes. The strategic
benefits to the Company that support the recognition of goodwill in this
acquisition include the mix of complementary high-quality assets in two of our
existing core areas, lower-risk exploitation opportunities, and increased cash
flow from operations available for investing activities.

Note 4 - Earnings per Share

         Basic net income per common share of stock is calculated by dividing
net income available to common stockholders by the weighted-average common
shares outstanding during each period. Vested restricted stock units are
included in the calculation of the weighted-average common shares outstanding.
On February 9, 2004, the Company repurchased and retired 6,761,636 shares of its
common stock (see Note 11-Repurchase of Common Stock).

         Diluted net income per common share of stock is calculated by dividing
adjusted net income by the weighted-average of common shares outstanding,
including the effect of potentially dilutive securities. Adjusted net income is
used for the if-converted method and is derived by adding interest expense paid
on the Company's 5.75% Senior Convertible Notes due 2022 (the "Convertible
Notes") back to net income and then adjusting for nondiscretionary items that
are based on income and that would have changed had the Convertible Notes been
converted at the beginning of the period. Potentially dilutive securities of the
Company consist of in-the-money outstanding options to purchase the Company's
common stock, shares into which the Convertible Notes may be converted and
unvested restricted stock units.

         The shares underlying the grants of restricted stock units are excluded
from basic and diluted earnings per share until the measurement date for grants
made under the Restricted Stock Plan. Upon measurement, all unvested shares
attributable to the restricted stock unit grant are included in the diluted
earnings per share calculation. Vested shares are included in both basic and
diluted earnings per share.

         The dilutive effect of stock options and unvested restricted stock
units is considered in the detailed calculation below. There were no
anti-dilutive securities related to stock options for the three-month period
ended March 31, 2005 and 1,223,356 anti-dilutive securities related to stock

                                      -9-



options for the three-month period ended March 31, 2004. There were no
anti-dilutive securities related to restricted stock units for any periods
presented.

         Shares associated with the conversion feature of the Convertible Notes
are accounted for using the if-converted method as described above and are
considered in the detailed calculation below. A total of 7,692,307 potentially
dilutive shares related to the Convertible Notes were included in the
calculation of diluted net income per common share for the three-month periods
ended March 31, 2005 and 2004. The Convertible Notes were issued in March 2002.

         The following table sets forth the calculation of basic and diluted
earnings per share:

                                                                                  For the Three Months Ended
                                                                                          March 31,
                                                                               ---------------------------------
                                                                                    2005              2004
                                                                               ---------------    --------------
                                                                                    (In thousands, except
                                                                                      per share amounts)

Net income                                                                      $    35,103        $    21,449

Adjustments to net income for dilution:
     Add: interest expense not incurred if Convertible Notes
        converted                                                                     1,563              1,580
     Less: other adjustments                                                            (16)               (16)
     Less: income tax effect of adjustment items                                       (574)              (593)
                                                                               ---------------    --------------
Net income adjusted for the effect of dilution                                  $    36,076        $    22,420
                                                                               ===============    ==============

Basic weighted-average common shares outstanding                                     57,231             59,549
     Add: dilutive effects of stock options and unvested
        restricted stock units                                                        2,124              1,142
     Add: dilutive effect of Convertible Notes using if-
        converted method                                                              7,692              7,692
                                                                               ---------------    --------------

Diluted weighted-average common shares outstanding                                   67,047             68,383
                                                                               ===============    ==============

Basic earnings per common share                                                 $      0.61        $      0.36
Diluted earnings per common share                                               $      0.54        $      0.33


Note 5 - Compensation Plans

Restricted Stock Plan

         In May 2004 the Restricted Stock Plan was approved by the Company's
stockholders. This established a long-term incentive program whereby grants of
restricted stock or restricted stock units may be awarded to eligible employees,
consultants, and members of the Board of Directors. Restrictions and vesting
periods for the awards are determined at the discretion of the Board of
Directors and are set forth in the award agreements. The total number of shares
of the Company's common stock reserved for issuance under the Restricted Stock
Plan is 11,200,000. This number is reduced to the extent that stock options are
granted under the Company's stock option plans.

         St. Mary issued 194,508 restricted stock units (RSUs) on March 15,
2005, related to 2004 performance. The total expense associated with this
issuance was $4.9 million as measured on the issuance date. The total measured
expense was initially recorded as deferred stock-based compensation and is being

                                      -10-



charged to compensation expense based on the vesting schedule. The RSU grants
vest 25 percent immediately upon issuance and 25 percent on each of the first
three anniversary dates. The vested shares underlying the RSU grants will be
issued on the third anniversary of the issuance, at which time the shares carry
no further restrictions. As of March 31, 2005, there were a total of 647,840
RSUs outstanding, of which 165,057 were vested. Total compensation expense for
the three-month period ended March 31, 2005, related to the RSUs was
$1.0 million. This expense included $380,000 of compensation expense related
to the 2005 plan year for grants expected to be issued in 2006.

Net Profits Plan

         Under the Company's Net Profits Plan, oil and gas wells that are
completed or acquired during a year are designated within a specific pool. Key
employees designated as participants by the Company's Compensation Committee of
the Board of Directors and employed by the Company on the last day of that year
vest and become entitled to bonus payments after the Company has received net
cash flows returning 100 percent of all costs and expenses associated with that
pool. Thereafter, 10 percent of future cash flows generated by the pool are
allocated among the participants and distributed at least annually. The portion
of cash flows from the pool to be allocated among the participants increases to
20 percent after the Company has recovered 200 percent of the total costs and
expenses for the pool, including payments made under the Net Profits Plan at the
10 percent level.

         Expenses related to current distributions made under the Net Profits
Plan for the three-month period ended March 31, 2005 and 2004 were $2.7 million
and $2.0 million, respectively. These amounts relate to current realized results
from oil and gas operations in the respective periods.

         The Company records the estimated future liability for the Net Profits
Plan based on the discounted value of estimated future payments associated with
each individual pool. The following table presents the changes in the estimated
future liability attributable to the Net Profits Plan:

                                                  For the Three Months Ended
                                                          March 31,
                                               -----------------------------------
                                                    2005               2004
                                               ---------------    ----------------
                                                          (In thousands)

Beginning liability for Net Profits Plan         $    30,561        $     6,163
Increase in liability                                  6,886              4,157
Reduction in liability for cash    payments
    made or accrued and recognized as
    compensation expense under the Net
    Profits Plan                                      (2,665)            (1,997)
                                               ---------------    ----------------
Ending liability for Net Profits Plan            $    34,782        $     8,323
                                               ===============    ================


         The Company records changes in the present value of estimated future
payments under the Net Profits Plan as a separate item in the consolidated
statements of operations. The change in the estimated liability is recorded as
an increase or decrease to expense in the current period. The amount recorded as
an increase or decrease to expense associated with the change in the estimated
liability is not allocated to general and administrative costs or exploration
costs because it is an estimate at the current time of the adjustment to the
liability that is associated with the future net cash flows from oil and gas
properties in the respective pools rather than current period realized
performance. The table below presents the estimated allocation of the change in
the liability if the Company did allocate the adjustment to these specific line
items:

                                      -11-



                                     For the Three Months Ended March 31,
                                     --------------------------------------
                                           2005                 2004
                                     -----------------    -----------------
                                                (In thousands)

General and administrative expense       $     2,142          $   1,087
Exploration expense                            2,079              1,073
                                     -----------------    -----------------
Total                                    $     4,221          $   2,160
                                     =================    =================

Stock Option Plans

         Statement of Financial Accounting Standards ("SFAS") No. 123,
"Accounting for Stock-Based Compensation," establishes a fair value method of
accounting for stock-based compensation through either recognition or
disclosure. The Company accounts for stock-based compensation using the
intrinsic value recognition and measurement principles prescribed in Accounting
Principles Board Opinion No. 25, "Accounting for Stock Issued to Employees"
("APB No. 25"), and has elected to adopt SFAS No. 123 through compliance with
the disclosure requirements set forth in the Statement. Because the exercise
price of the Company's stock options equals the market price of the underlying
common stock on the date of grant, no compensation expense is recognized under
APB No. 25. The following table illustrates the pro forma effect on net income
and earnings per share if the Company had applied the fair value recognition
provisions of SFAS No. 123 to stock-based employee compensation for the periods
presented.

                                                                          For The Three Months Ended March 31,
                                                                          ------------------------------------
                                                                                 2005              2004
                                                                          -----------------  ------------------
                                                                                     (In thousands,
                                                                               except per share amounts)
Net income -
- ------------                                                                $      35,103      $       21,449
    As reported:
    Add:  stock-based employee compensation expense
       included in reported net income, net of related tax effects                    652                   -
    Less:  stock-based employee compensation expense
       determined under fair value based method for all awards,
       net of related income tax effects                                           (1,227)               (883)
                                                                          -----------------  ------------------
    Pro forma net income                                                    $      34,528      $       20,566
                                                                          =================  ==================
Basic earnings per share -
- --------------------------
    As reported                                                             $        0.61      $         0.36
    Pro forma                                                               $        0.60      $         0.35

Diluted earnings per share -
- ----------------------------
    As reported                                                             $        0.54      $         0.33
    Pro forma                                                               $        0.53      $         0.31


         For purposes of these pro forma disclosures, the estimated fair values
of the options are amortized to expense over the options' vesting periods. The
effects of applying SFAS No. 123 in the pro forma disclosure are not necessarily
indicative of actual future amounts.

                                      -12-



         The fair value of options is measured at the date of grant using the
Black-Scholes option-pricing model. The fair value of options granted in the
three-month period ended March 31, 2004, were estimated using the following
weighted-average assumptions. No options were granted during the three-month
period ended March 31, 2005.

                                                         For the Three
                                                          Months Ended
                                                         March 31, 2004
                                                    ---------------------

Risk free interest rate
       Stock options                                          3.6%
       Employee Stock Purchase Plan                            **
Dividend yield
       Stock options                                          0.3%
       Employee Stock Purchase Plan                            **
Volatility factor of the expected market price
  of the Company's common stock
       Stock options                                         38.7%
       Employee Stock Purchase Plan                            **
Expected life of the options (in years)
       Stock options                                          7.6
       Employee Stock Purchase Plan                            **
- ----------------------------
**   No shares were issued under the Employee Stock Purchase Plan in the first
     quarter of fiscal years 2005 or 2004.

         The Black-Scholes option valuation model was developed for use in
estimating the fair value of traded options that have no vesting restrictions
and are fully transferable. In addition, option valuation models require the
input of highly subjective assumptions including the expected stock price
volatility. The Company's stock options have characteristics significantly
different from those of traded options, and because changes in the subjective
input assumptions can materially affect the fair value estimate, it is
management's opinion that the valuations afforded by the existing models are
different from the value that the options would realize if traded in the market.

         In December 2004 the FASB issued SFAS No. 123 (Revised 2004),
"Shared-Based Payment". This statement provides for the accounting for
transactions in which an entity exchanges equity instruments or incurs
liabilities in exchange for goods or services. The effective date of this
statement was delayed until January 1, 2006, by the Securities and Exchange
Commission. Under the modified-prospective method, the Company estimates that it
will record a total of $3.1 million of compensation expense in periods after the
implementation date related to the unvested portion of its stock options issued
prior to the effective date. There will be no cumulative effect of change in
accounting principle as a result of the adoption of SFAS No 123 (revised 2004).

Note 6 - Income Taxes

         Income tax expense for the three months ended March 31, 2005 and 2004
differ from the amounts that would be provided by applying the statutory U.S.
Federal income tax rate to income before income taxes primarily due to the
effect of the composition of state income taxes, percentage depletion, changes
in the composition of income tax rates, the estimated effect of the domestic

                                      -13-



production activities deduction from the recently enacted American Jobs Creation
Act of 2004 and other permanent differences.

         For the three-month period ended March 31, 2005, the Company's current
portion of income tax expense was $10.4 million compared to $5.9 million for the
same period in 2004. The Company's effective tax rate for the three-month period
ended March 31, 2005, was 37.1 percent compared to 37.9 percent for the
three-month period ended March 31, 2004. The decrease in tax rate reflects a
change in the composition of the estimated highest marginal state tax rate as a
result of acquisition and drilling activity. It also reflects the Company
estimate of the effect of the domestic production activities deduction and the
possible impact of state permanent differences.

Note 7 - Long-term Debt

Revolving Credit Facility

         The Company executed an Amended and Restated Credit Agreement on April
7, 2005, with a five year term. This facility replaced the previous facility.
The new credit facility specifies a maximum loan amount of $500.0 million and
has a maturity date of April 7, 2010. Borrowings under the facility are secured
by a pledge in favor of the lenders of collateral that includes certain oil and
gas properties and the common stock of the material subsidiaries of the Company.
The initial borrowing base under the new credit facility as authorized by the
bank group was $400.0 million. The borrowing base is subject to regular
semi-annual redeterminations. The borrowing base redetermination process
considers the value of St. Mary's oil and gas properties and other assets, as
determined by the bank syndicate. The Company elected an aggregate commitment
amount of $200.0 million under the new credit facility. The Company must comply
with certain financial and non-financial covenants. Interest and commitment fees
are accrued based on the borrowing base utilization percentage table below.
Eurodollar loans accrue interest at LIBOR plus the applicable margin from the
utilization table, and Alternative Base Rate (ABR) loans accrue interest at
Prime plus the applicable margin from the utilization table. Commitment fees are
accrued on the unused portion of the aggregate commitment amount and are
included in interest expense in the consolidated statements of operations.

Borrowing base
   utilization percentage         <50%         >50%<75%         >75%<90%          >90%
- -----------------------------------------------------------------------------------------------
Eurodollar loans                 1.000%          1.250%           1.500%          1.750%
ABR loans                        0.000%          0.250%           0.250%          0.500%
Commitment fee rate              0.250%          0.300%           0.375%          0.375%

         At March 31, 2005, the Company's borrowing base utilization percentage
as defined under the credit agreement was 24 percent. The Company had $42
million in Eurodollar loans and $5 million in ABR loans outstanding under its
revolving credit agreement as of March 31, 2005.

5.75% Senior Convertible Notes Due 2022

         As of March 31, 2005, the Company also had $100.0 million in
outstanding borrowings under the Convertible Notes. The Convertible Notes
provide for the payment of contingent interest of up to an additional 0.5
percent during six-month interest periods based on the note trading price before
the beginning of the particular six-month period. Under that provision, interest
was accrued at a total rate of 6.25 percent for the three-month periods ended
March 31, 2005 and 2004. Based on the trading price of the Convertible Notes
over the determination periods, the Company will be subject to the contingent
interest payments for the period from March 16, 2005 to September 15, 2005.

                                      -14-



Weighted-average Interest Rate Paid

         The weighted-average interest rates paid for the first quarters of 2005
and 2004 were 7.1 percent and 6.0 percent, respectively, including commitment
fees paid on the unused portion of the credit facility aggregate commitment,
amortization of deferred financing costs, amortization of the contingent
interest embedded derivative and the effects of interest rate swaps. The Company
capitalized interest costs of $397,000 and $276,000 for the three-month periods
ended March 31, 2005 and 2004, respectively.

Note 8 - Derivative Financial Instruments

         The Company recognized a net gain of $1.6 million from its oil and gas
derivative contracts for the three months ended March 31, 2005, compared to a
net loss of $8.6 million for the same period in 2004.

         The following table summarizes all derivative instrument gain (loss)
activity:

                                                              For the Three Months Ended
                                                                       March 31,
                                                             -------------------------------
                                                                  2005             2004
                                                             --------------   --------------
                                                                    (In thousands)

Derivative contract settlements included in
   oil and gas hedge gain (loss)                             $      1,560     $      (8,599)
Interest rate derivative contract settlements                          28               484
Ineffective portion of hedges qualifying for
   hedge accounting included in derivative gain (loss)               (614)               15
Non-qualified derivative contracts included
   in derivative gain (loss)                                         (515)              837
                                                             ---------------  --------------
              Total                                          $        459     $      (7,263)
                                                             ===============  ==============

                                      -15-



Oil and Gas Commodity Hedges

         The Company has in place derivative contracts for the sale of oil and
natural gas. The Company attempts to qualify these instruments as cash flow
hedges for accounting purposes. The table below describes the volumes and
average contract prices of hedges currently in place. The Company's oil and
natural gas derivatives include swap and collar agreements. Gas contracts are
indexed to a variety of regional indexes, and the oil contracts are NYMEX based.

Swaps                                  Gas (per MMBtu)                                 Oil (per Bbl)
- -----                      -----------------------------------------     -------------------------------------------
                                                 Weighted-Average                               Weighted-Average
Contract                                          Contract Price                                 Contract Price
Period                        Volumes            (Regional Index)            Volumes                (NYMEX)
                           ---------------    -----------------------    ----------------    -----------------------
2005
- ----

Quarter Ending:
    June 30,                     2,426,600         $      6.23                  258,214         $      45.55
    September 30,                2,505,000         $      6.44                  299,980         $      45.55
    December 31,                 2,490,000         $      6.77                  249,770         $      45.42
                           ----------------                               ---------------
Total 2005                       7,421,600         $      6.48                  807,964         $      45.51
                           ----------------                               ---------------

2006
- ----
Quarter Ending:
    March 31,                    1,620,000         $      7.13                  214,366         $      44.70
    June 30,                     1,060,000         $      5.80                  136,976         $      41.19
    September 30,                  690,000         $      5.49                  100,372         $      37.47
    December 31,                   270,000         $      5.55                   77,686         $      36.42
                           ---------------                                ---------------
Total 2006                       3,640,000         $      6.32                  529,400         $      41.21
                           ---------------                                ---------------
2007
- ----
Quarter Ending:
    March 31,                            -         $         -                   63,410         $      35.63
    June 30,                             -         $         -                   61,072         $      35.35
    September 30,                        -         $         -                   62,684         $      35.10
    December 31,                         -         $         -                   60,620         $      34.79
                           ---------------                                ---------------
Total 2007                               -         $         -                  247,786         $      35.22
                           ---------------                                ---------------
All Contracts                   11,061,600         $      6.43                1,585,150         $      42.47
                           ===============                                ===============


Collars                                                        Gas (per MMBtu)
- -------
                                     ---------------------------------------------------------------------
                                    Weighted-Average Weighted-Average
Contract                                 Floor          Ceiling
Period                                   Price           Price            Volumes              Index
                                     -------------- -------------- --------------------- -----------------
2005
- ----
Quarter Ending:
     June 30,                         $      5.73    $     7.20          540,000            IF ANR OK
     September 30,                    $      5.75    $     7.30          415,000            IF ANR OK
     December 31,                     $      6.00    $     7.63          390,000            IF ANR OK
                                                                   ---------------------
All Contracts                         $      5.82    $     7.36        1,345,000
                                                                   =====================


                                      -16-



         The Company seeks to minimize basis risk and indexes its oil contracts
to NYMEX prices and its gas contracts to various regional index prices
associated with pipelines in proximity to the Company's areas of gas production.
Swap natural gas volumes associated with specific Inside FERC ("IF") regional
indexes are as follows:

Regional Index                                    MMBtu
- --------------                                --------------
IF ANR OK                                         6,531,600
IF Reliant N/S                                    2,500,000
IF PEPL                                           2,030,000
                                              --------------
Total                                            11,061,600
                                              ==============


         Derivative gains and losses in the consolidated statements of
operations for the three-month periods ended March 31, 2005 and 2004 include a
net loss of $614,000 and a net gain of $15,000, respectively, from
ineffectiveness related to oil and natural gas derivative contracts. On March
31, 2005, the estimated fair value of oil and natural gas derivative contracts
designated and qualifying as cash flow hedges under SFAS No. 133 was a net
liability of $31.6 million. If prices remain unchanged from March 31, 2005
levels, the Company would reclassify this amount to oil and gas hedge loss
included in operating revenue as the hedged production quantities are produced.
As of March 31, 2005, the net amount of unrealized loss net of deferred income
taxes to be reclassified from accumulated other comprehensive income to oil and
natural gas production operating revenues in the next twelve months was $12.9
million. The Company anticipates that all original forecasted transactions will
occur by the end of the originally specified time periods.

Interest Rate Derivative Contracts

         In October 2003 the Company entered into fixed-to-floating interest
rate swaps for a total notional amount of $50.0 million through March 20, 2007.
Under the swaps, St. Mary will be paid a fixed interest rate of 5.75 percent and
will pay a variable interest rate of 235 basis points above the six-month LIBOR
rate as determined on the semi-annual settlement date. The payment dates of the
swaps match exactly with the interest payment dates of the Convertible Notes.
The six-month LIBOR rate on March 31, 2005 was 3.4 percent. The fair value of
the swaps was a liability of $1.1 million as of March 31, 2005. During the
three-month periods ended March 31, 2005 and 2004, the Company received payments
of $28,000 and $484,000, respectively, under the swap arrangements. These
payments have reduced the Company's interest expense. The Company recorded a net
derivative loss in the consolidated statements of operations of $676,000 for the
three-month period ended March 31, 2005, and a net derivative gain of $834,000
for the three-month period ended March 31, 2004, from mark-to-market adjustments
for this derivative.

         The Company entered into a floating-to-fixed interest rate swap on
April 13, 2005, for a total notional amount of $50.0 million through March 20,
2007, that effectively offset the fixed-to-floating interest rate swaps
described above. Under the swap, St. Mary will be paid a variable interest rate
of 235 basis points above the six-month LIBOR rate as determined on the
semi-annual settlement date and will pay a fixed interest rate of 6.85 percent.
The payment dates of the swap match exactly with the interest payment dates of
the Convertible Notes and fixed-to-floating interest rate swaps. The impact of
this instrument, when combined with the other interest rate swaps, is that the
Company has fixed its net liability related to the interest rate swaps and will
pay a 1.1 percent interest factor on $50.0 million of notional debt through
March 2007.

         These swaps do not qualify for fair value hedge treatment under SFAS
No. 133 and related pronouncements.

                                      -17-



Convertible Note Derivative Instrument

         The contingent interest provision of the Convertible Notes is
considered an embedded equity-related derivative that is not clearly and closely
related to the fair value of an equity interest and therefore must be separately
accounted for as a derivative instrument. The value of the derivative at
issuance of the Convertible Notes in March 2002 was $474,000. This amount was
recorded as a decrease to the Convertible Notes payable in the consolidated
balance sheets. Interest expense for each of the three-month periods ended March
31, 2005 and 2004, includes $24,000 of amortization. Derivative gain (loss) in
the consolidated statements of operations for the three-month periods ended
March 31, 2005 and 2004, includes a net gain of $160,000 and $4,000,
respectively, from mark-to-market adjustments for this derivative. The fair
value of this derivative at March 31, 2005 and 2004 was a liability of $660,000
and $771,000, respectively.

Note 9 - Pension Benefits

         In December 2003 the FASB issued SFAS No. 132 (revised 2003),
"Employers' Disclosures about Pensions and Other Postretirement Benefits." This
statement replaces FASB Statement No. 132, "Employers' Disclosures about
Pensions and Other Postretirement Benefits", and adds certain annual and interim
period disclosure requirements.  The provisions of this statement do not change
the measurement and recognition provisions of FASB No. 87, "Employers'
Accounting for Pensions", No. 88, "Employers' Accounting for Settlements and
Curtailments of Defined Benefit Pension Plans and for Termination Benefits", and
No. 106, "Employers' Accounting for Postretirement Benefits Other Than
Pensions."  Interim period disclosure requirements have been incorporated
herein.

         The Company's employees participate in a non-contributory pension plan
covering substantially all employees who meet age and service requirements (the
"Qualified Pension Plan"). The Company also has a supplemental non-contributory
pension plan covering certain management employees (the "Nonqualified Pension
Plan").

Components of Net Periodic Benefit Cost

         The following table presents the components of the net periodic cost
for both the Qualified Pension Plan and the Nonqualified Pension Plan:

                                                    For the Three Months Ended
                                                             March 31,
                                                 ----------------------------------
                                                      2005               2004
                                                 ---------------    ---------------
                                                           (In thousands)
Components of net periodic benefit cost:
      Service cost                                 $      346          $      285
      Interest cost                                       134                 122
      Expected return on plan assets                      (94)                (74)
      Amortization of prior service cost                    -                  (4)
      Amortization of net actuarial loss                   60                  55
                                                 ---------------    ---------------
      Net periodic benefit cost                    $      446          $      384
                                                 ===============    ===============

         Prior service costs are amortized on a straight-line basis over the
average remaining service period of active participants. Gains and losses in
excess of 10 percent of the greater of the benefit obligation and the
market-related value of assets are amortized over the average remaining service
period of active participants.

                                      -18-



Contributions

         St. Mary expects to contribute approximately $1.1 million to the
pension plans in 2005 as was previously disclosed in its financial statements
for the year ended December 31, 2004.

Note 10 - Asset Retirement Obligations

          The Company recognizes an estimated liability for future costs
associated with the abandonment of its oil and gas properties. A liability for
the fair value of an asset retirement obligation and a corresponding increase to
the carrying value of the related long-lived asset is recorded at the time a
well is completed or acquired. The increase in carrying value is included in
proved oil and gas properties in the consolidated balance sheets. The Company
depletes the amount added to proved oil and gas property costs and recognizes
accretion expense in connection with the discounted liability over the remaining
estimated economic lives of the respective oil and gas properties.

         The Company's estimated asset retirement obligation liability is based
on historical experience in abandoning wells, estimated economic lives, external
estimates as to the cost to abandon the wells in the future and federal and
state regulatory requirements. The liability is discounted using a
credit-adjusted risk-free rate estimated at the time the liability is incurred
or revised. The credit-adjusted risk-free rates used to discount the Company's
abandonment liabilities range from 6.50 percent to 7.25 percent. Revisions to
the liability could occur due to changes in estimated abandonment costs or well
economic lives, or if federal or state regulators enact new requirements
regarding the abandonment of wells.

         A reconciliation of the Company's asset retirement obligation liability
is as follows:

                                                        For the Three Months

                                                           Ended March 31,
                                                    --------------------------------
                                                         2005              2004
                                                    --------------    --------------
                                                          (In thousands)

Beginning asset retirement obligation               $     40,911      $    25,485
  Liabilities incurred                                     2,169              172
  Liabilities settled                                       (323)             (86)
  Accretion expense                                          705              465
                                                    --------------    --------------
Ending asset retirement obligation                  $     43,462      $    26,036
                                                    ==============    ==============


Note 11 - Repurchase of Common Stock

Repurchase of Common Stock from Flying J

         On February 9, 2004, the Company repurchased 6,671,636 restricted
shares of its common stock from Flying J Oil & Gas and Big West Oil &
Gas, Inc. (collectively "Flying J") for a total of $91.0 million. St. Mary
originally issued these shares to Flying J on January 29, 2003, in connection
with St. Mary's acquisition of certain oil and gas properties. In addition to
issuing the shares in the acquisition, St. Mary loaned Flying J $71.6 million.
Flying J used the proceeds of the stock repurchase to repay their outstanding
loan balance of $71.6 million. Accrued interest, which had not been recorded by
the Company for financial reporting purposes due to the non-recourse nature of
the loan was forgiven. The net $19.4 million cash outlay for the repurchase was
funded from the Company's existing cash balances and borrowings under its bank
credit facility.

                                      -19-



Stock Repurchase Program

         In August 2004 the Company's Board of Directors approved an increase in
the number of shares that may be repurchased under the original authorization
approved in August of 1998 to 6,000,000 as of the effective date of the
resolution. The shares may be repurchased from time to time in open market
transactions or privately negotiated transactions, subject to market conditions
and other factors, including certain provisions of St. Mary's existing credit
facility agreement and compliance with securities laws. Stock repurchases may be
funded with existing cash balances, internal cash flow and borrowings under the
credit facility. The Company did not repurchase any shares of its common stock
under the program in the first quarter of 2005 and has 5,021,400 remaining
shares that may be repurchased under this authorization.


ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

         This discussion contains forward-looking statements. Please refer to
the Cautionary Statement about Forward-Looking Statements at the end of this
item for an explanation of these types of statements.


Overview of the Company

General Overview

         We are an independent energy company focused on the exploration,
exploitation, development, acquisition and production of natural gas and crude
oil in the United States. We earn our revenues and generate our cash flows from
operations primarily from the sale at the wellhead of produced natural gas and
crude oil.  Our oil and gas reserves and operations are concentrated in the
Anadarko, Arkoma, Permian and various Rocky Mountain basins and in the onshore
Gulf Coast and in the offshore Gulf of Mexico. We maintain a balanced portfolio
of proved reserves, development drilling opportunities and non-conventional gas
prospects.

Stock Dividend

         In March 2005 the Board of Directors approved a two-for-one stock split
in the form of a stock dividend whereby one additional common share of stock was
distributed for each common share outstanding. The stock dividend was
distributed on March 31, 2005, to shareholders of record as of the close of
business on March 21, 2005. All share and per share amounts for all periods
presented herein have been restated to reflect this stock split.

Oil and Gas Prices

         Our results of operations and financial condition are significantly
affected by oil and natural gas commodity prices, which can fluctuate
dramatically. Through the first quarter of 2005 we continued to benefit from
high oil and gas prices that helped contribute to a record financial results for
us in the quarter. Higher natural gas prices are the result of tightening supply
coupled with increasing demand in the United States. Finite storage capacity,
changes in production, import capacity, and weather-related effects on domestic
demand have a significant effect on price volatility. Higher oil prices reflect
decreases in worldwide production capacity, continuing increases in demand from
the global economy, and continued instability in the Middle East.

                                      -20-



First Quarter 2005 Highlights

         NYMEX prices for the first quarter of 2005 averaged $6.32 per MMBtu and
$49.85 per barrel, a decrease of 8 percent for gas and an increase of 3 percent
for oil compared to the fourth quarter of 2004. These prices were 11 percent
higher for gas and 42 percent higher for oil than for the comparable period a
year ago. As of March 31, 2005, the NYMEX strip price for the remainder of the
year was $56.65 per barrel for oil and $7.88 per MMBtu for gas compared to
March 31, 2004 NYMEX strip prices of $33.42 per barrel and $5.57 per MMBtu.

         On January 5, 2005, we closed the acquisition of Agate Petroleum Inc.
for $39.9 million in cash. Based on the preliminary purchase price allocation,
we acquired $4.6 million in cash from Agate and purchase accounting resulted in
recording approximately $41.9 million to oil and gas properties, $9.6 million to
goodwill, $1.2 million to net current liabilities, $13.6 million of deferred
income tax liability and a $1.4 million asset retirement obligation.

         On April 7, 2005, we closed a new five-year, $500 million credit
facility agreement with Wachovia Bank, Wells Fargo Bank and eight other
participating banks. The initial borrowing base for the facility was set as $400
million, and we elected an initial commitment of $200 million. Additional
details regarding this facility are included below.

         The quarter ended March 31, 2005, resulted in record high oil and gas
revenues, net income, production, and net cash provided by operating activities.
Net income for the quarter ended March 31, 2005, was $35.1 million or $0.54 per
diluted share compared to the 2004 results of $21.4 million or $0.33 per diluted
share. Net cash provided by operating activities was $92.1 million, up 131
percent from the $39.9 million provided in the first quarter of 2004. Production
increased 12 percent to 20.6 BCFE on a comparative-quarter basis, and our
average realized price increased 35 percent to $6.78 per MCFE. Unit costs
increased for the period as total production costs increased $0.28 to $1.56 per
MCFE, and DD&A increased $0.34 to $1.46 per MCFE.

         The following table provides information regarding trends for selected
financial information for the quarter ended March 31, 2005 compared to the
immediate preceding quarter ended December 31, 2004:

                                                      Three Months Ended
                                             -------------------------------------
                                               March 31,          December 31,
                                                 2005                 2004              % Change
                                             --------------     ------------------    -------------
                                                        (In millions)

Production (MCFE)                                   20.6                 19.9                4%
Oil and gas revenues                          $    139.9           $    139.3                -
Production expenses                           $     32.2           $     26.2               23%
General and administrative expense            $      6.0           $      5.5                8%
Net income                                    $     35.1           $     26.6               32%


Outlook for the Remainder of 2005

         Over the remainder of 2005 we will continue to execute our business
plan, which includes:

         o    Our capital expenditures budget remains constant at $418 million.
              Of this amount, $293 million is allocated to drilling. A table of
              budgeted amounts by core area is detailed under the caption
              Capital Expenditure Budget. We have already spent $41.9 million of
              our $125 million acquisitions budget, primarily on the Agate
              acquisition, and we continue to aggressively evaluate acquisition
              opportunities.

                                      -21-



         o    Our Hanging Woman Basin coalbed methane project is currently in
              full development. As anticipated, we completed 20 wells in the
              first quarter of 2005 and are projecting that we will complete a
              total of 150 wells for the year. Production for the project is
              ahead of projected amounts and was 1,648 MCFE per day on April 25,
              2005.

         o    We plan to participate in 24 well completions in the Williston
              Basin Middle Bakken Play. We currently have two operated drilling
              rigs and two operated re-entry rigs in the play. We are attempting
              to add a third operated drilling rig in this area in 2005.

         o    We tentatively plan to drill nine horizontal wells in the
              Centrahoma field in 2005. The Mowdy #1 well was completed
              horizontally in March 2005 in the Cromwell sand with an initial
              rate of 3,000 MCFE per day and is currently producing 2,600 MCFE
              per day. We have successfully completed vertical producing wells
              in 11 sections of the Cromwell formation. We hold 36,000 gross and
              20,000 net contiguous acres in this area, and approximately half
              of the acreage is held by existing production. We are currently
              evaluating future development plans and expect to ultimately drill
              approximately four horizontal wells per section in the field. The
              Wapanuka limestone, which has produced from vertical wells, may
              also respond to this completion technique.

         o    We continue to anticipate that production for 2005 will exceed
              2004 reported amounts as a result of acquisitions and our drilling
              programs.

                                      -22-



A quarter-to-quarter overview of selected reserve, production and financial
information, including trends:

Selected Operations Data (In Thousands, Except Price and Per MCFE Amounts):
                                                Three Months Ended March 31,
                                              ----------------------------------     % Change
                                                  2005               2004         Between Periods
                                              --------------    ----------------  ---------------

Net production volumes
- ----------------------
Natural gas (Mcf)                                 12,047             11,613                4%
Oil (Bbl)                                          1,433              1,141               26%
MCFE (6:1)                                        20,647             18,456               12%

Average daily production
- ------------------------
Natural gas (Mcf per day)                            134                128                5%
Oil (Bbls per day)                                    16                 13               27%
MCFE per day (6:1)                                   229                203               13%

Oil & gas production revenues
- ---------------------------------
Gas production, including hedging              $  74,891         $   60,439               24%
Oil production, including hedging                 65,039             32,168              102%
                                              --------------    ----------------
Total                                          $ 139,930         $   92,607               51%
                                              ==============    ================

Oil & gas production expense
- --------------------------------
Lease operating expenses                       $  20,236         $   15,177               33%
Transportation costs                               1,880              1,737                8%
Production taxes                                  10,043              6,629               52%
                                              --------------    ----------------
Total                                          $  32,159         $   23,543               37%
                                              ==============    ================

Average realized sales price(1)
- -------------------------------
Natural gas (Per Mcf)                          $    6.22         $     5.20               20%
Oil (Per Bbl)                                  $   45.37         $    28.20               61%

Per MCFE data:
- --------------
Average net realized price(1)                  $    6.78         $     5.02               35%
Lease operating expense                            (0.98)             (0.83)              20%
Transportation costs                               (0.09)             (0.09)               0%
Production taxes                                   (0.49)             (0.36)              36%
General and administrative                         (0.29)             (0.30)             (1)%
                                              --------------    ----------------
Operating profit                               $    4.93         $     3.44               43%
                                              ==============    ================
Depletion, depreciation and amortization       $    1.46         $     1.12               30%

Financial Information (In Thousands, Except Per Share Amounts):

                                               March 31,       December 31,      % Change
                                                 2005              2004        Between Periods
                                             --------------    -------------   ---------------
Working capital (deficit)                     $     (959)       $   12,035       (108)%
Long-term debt                                $  146,814        $  136,791           7%
Stockholders' equity                          $  500,290        $  484,455           3%

                                               Three Months Ended March 31,
                                             -------------------------------     % Change
                                                 2005              2004        Between Periods
                                             --------------    -------------   ---------------
Basic net income per common share             $     0.61        $     0.36          69%
Diluted net income per common share           $     0.54        $     0.33          64%

Basic weighted-average shares outstanding         57,231            59,549         (4)%
Diluted weighted-average shares outstanding       67,047            68,383         (2)%

Net cash provided by operating activities     $   92,131        $   39,918         131%
Net cash used in investing activities         $  (94,278)       $  (41,472)        127%
Net cash provided by financing activities     $   13,249        $    4,533         192%

- --------------------------------------------
(1) Includes the effects of our hedging
    activities

                                      -23-



         We present the preceding table as a summary of information relating to
those key indicators of financial condition and operating performance that we
believe to be most important. We present per MCFE information since we use this
information to evaluate our performance relative to our peers and to measure
trends that we believe require analysis. Our period-to-period comparison of
financial results presented later provides additional details for the per MCFE
differences between reported periods.

         For the remainder of this year we expect oil and gas production
expenses will increase compared to prior year amounts. Production taxes will be
higher as a percentage of revenue in the remainder of 2005 as a result of the
increase in pricing that we are experiencing. Depreciation, depletion and
amortization will increase due to the higher costs associated with finding and
acquiring crude oil and natural gas. We expect general and administrative
expense per MCFE for all of 2005 will remain fairly consistent relative to the
first three months of 2005.

         The remaining information in the table relates to information we have
provided in operations update press releases and is intended to supplement the
discussion above.

Overview of Liquidity and Capital Resources

         We believe that we have sufficient liquidity and capital resources to
execute our business plans for the foreseeable future.

Sources of Cash

         Our primary sources of liquidity are the cash provided by operating
activities, debt financing and access to the capital markets.

         Our current credit facility. On April 7, 2005, we entered into a new
five-year, $500 million credit facility agreement with Wachovia Bank, Wells
Fargo Bank and eight other participating banks. This new credit facility
replaced our previous $300.0 million credit facility discussed in Part II, Item
7 of our Form 10-K for the year ended December 31, 2004. The initial borrowing
base for the new facility is set at $400 million. We elected an initial
commitment amount of $200 million, which results in lower commitment fees
payable to the bank syndicate. We believe this commitment level is adequate for
our near-term liquidity requirements. The credit agreement has a maturity date
of April 7, 2010. We must comply with certain financial and non-financial
covenants, and we are currently in compliance with all of these covenants.
Interest and commitment fees are accrued based on the borrowing base utilization
percentage. Eurodollar loans accrue interest at LIBOR plus the applicable margin
from the utilization table, and Alternate Base Rate loans accrue interest at
prime plus the applicable margin from the utilization table. This table is
located in Note 7 of Part I, Item 1 of this report. Borrowings under the new
facility are secured by the majority of our oil and gas properties and a pledge
of the common stock of our material subsidiary companies.

         Commitment fees are accrued on the unused portion of the aggregate
commitment amount and are included in interest expense in the consolidated
statements of operations. Our loan balance of $47.0 million on March 31, 2005,
was comprised of $42.0 million of Eurodollar based borrowing and $5.0 million of
ABR borrowing. As of April 29, 2005, our total outstanding borrowings under the
new credit facility had been reduced to $32.0 million of Eurodollar based
borrowing and no ABR borrowing.

         We increased our net borrowings by $10.0 million to $146.8 million in
the first quarter of 2005 primarily to fund our purchase of Agate Petroleum. Our
weighted-average interest rate paid in the first quarter of 2005 was 7.1 percent
and included commitment fees paid on the unused portion of the credit facility
borrowing base, amortization of deferred financing costs, amortization of the
contingent interest embedded derivative associated with the convertible notes,
and the effects of interest rate swaps.

                                      -24-



         Interest rate market risk. Market risk is estimated as the potential
change in fair value resulting from an immediate hypothetical one-percentage
point parallel shift in the yield curve. We entered into a floating-to-fixed
interest rate swap on April 13, 2005, for a total notional amount of $50.0
million through March 20, 2007 in order to effectively offset our
fixed-to-floating interest rate swaps. Under the floating-to-fixed interest rate
swap, we will be paid a variable interest rate of 235 basis points above the
six-month LIBOR rate as determined on the semi-annual settlement date and will
pay a fixed interest rate of 6.85 percent. The impact of this instrument, when
combined with the other interest rate swaps, is that we have fixed our net
liability related to the interest rate swaps, and we will pay a 1.1 percent
interest factor on $50.0 million of notional debt through March 2007. The
payment dates of the swap match exactly with the interest payment dates of the
convertible notes and the fixed-to-floating interest rate swaps. We anticipate
that increasing interest rates will result in higher interest expense for us in
2005 compared to last year.

         The sensitivity analysis discussed below presents the hypothetical
change in fair value of those financial instruments we held at March 31, 2005,
that are sensitive to changes in interest rates. For fixed-rate debt, interest
rate changes affect the fair market value but do not impact results of
operations or cash flows. Conversely, interest rate changes for floating-rate
debt generally do not affect the fair market value but do impact future results
of operations and cash flows, assuming other factors are held constant. The
carrying amount of our floating-rate debt approximates its fair value. Giving
consideration to the interest rate swaps in effect on March 31, 2005, we had
floating-rate debt of $97.0 million and had $50.0 million of fixed-rate debt as
of that date. Assuming constant debt levels, the cash flow impact for the
remainder of the year resulting from a one-percentage point change in interest
rates would be approximately $728,000 before taxes. The results of operations
impact might be less than this amount as a direct effect of the capitalization
of interest to wells drilled during the year. In prior years when our debt
amount was at a reduced level we capitalized a larger percentage of our interest
expense. Since we cannot predict the exact amount that would be capitalized, we
cannot predict the exact effect that a one-percentage point shift would have on
the results of operations. As a result of the new interest rate swap in April
2005 and a reduction in amounts outstanding under our credit facility, we had
floating-rate debt of $32.0 million and fixed-rate debt of $100.00 million as of
April 29, 2005.

Uses of Cash

         We use cash for the acquisition, exploration and development of oil and
gas properties and for the payment of debt obligations, trade payables and
stockholder dividends. In the first quarter of 2005 we spent $98.0 million on
capital development using cash flows from operations and debt financing. Our net
payables decreased by $7.1 million and we made a $6.0 million cash payment for
income taxes.

         We have 5,021,400 shares that may be repurchased under our stock
repurchase program. The shares may be repurchased from time to time in open
market transactions or privately negotiated transactions, subject to market
conditions and other factors, including certain provisions of our existing bank
credit facility agreement and compliance with securities laws.

         In connection with our two-for-one stock split in March 2005, we
announced that the semi-annual dividend rate would remain at $0.05 per share.
This effectively doubles our cash dividend payments from 2004.

         The following table presents amounts and percentage changes between the
quarters ended March 31, 2005 and 2004, from our operating, investing and
financing activities. The analysis following the table should be read in
conjunction with our consolidated statements of cash flows in Part I, Item 1 of
this report.

                                      -25-



                                                         Amount of Change           Percent of Change
                                                            2005/2004                Between Periods
                                                         ----------------           -----------------
Net cash provided by operating activities                     52,213                       131%
Net cash used in investing activities                        (52,806)                      127%
Net cash provided by financing activities                      8,716                       192%


Analysis of cash flow changes between the quarters ended March 31, 2005 and
March 31, 2004

         Operating activities. Sources of cash flow from oil and gas sales, net
of the effects of hedging, increased $51.7 million between the period ended
March 31, 2005 and the period ended March 31, 2004. This was the result of a 35
percent increase in our realized prices and a 12 percent increase in production
between the two periods. Cash expenditures for oil and gas production expenses,
exploration expenses and administrative expenses increased by $4.9 million
during the same timeframe, and in the first quarter of 2004 we made a $5.8
million advance payment for income taxes.

         Investing activities. The increase in net cash used resulted from
$20.8 million of increased drilling expenditures in the first quarter of 2005
compared to the first quarter of 2004 and from our $39.9 million acquisition of
Agate in 2005, less $4.6 million of cash we received at closing. Total 2005
capital expenditures, including acquisitions of oil and gas properties,
increased $55.0 million or 128 percent to $98.0 million compared to $43.0
million in 2004.

         Financing activities. The $8.7 million increase in cash provided
between periods presented above reflects the net $19.4 million we paid to
repurchase our shares from Flying J on February 9, 2004, and a $10.0 million
increase in borrowing against our credit facility in 2005 to fund our drilling
and acquisition programs. On February 9, 2004, we repurchased 6,761,636 shares
of our common stock from Flying J for a total of $91.0 million. We originally
issued these shares to Flying J on January 29, 2003, in connection with our
acquisition of oil and gas properties. At that time we also loaned Flying J
$71.6 million. Flying J used the proceeds from the share repurchase to repay the
outstanding loan balance. The net $19.4 million difference was funded from our
available cash and from borrowings under our credit facility.

         St. Mary had $17.5 million in cash and cash equivalents and had
negative working capital of $1.0 million as of March 31, 2005, compared to $6.4
million in cash and cash equivalents and working capital of $12.0 million as of
December 31, 2004.

Capital Expenditure Budget

         Expenditures for exploration and development of oil and gas properties
and acquisitions are the primary use of our capital resources. We still
anticipate spending approximately $418 million for capital and exploration
expenditures in 2005 with $125 million allocated for acquisitions of producing
properties. Anticipated ongoing exploration and development expenditures and
budgeted gross wells for each of our core areas are as follows. The timing of
drilling and completion of wells is variable and will differ from these
estimates.

                                 Exploration and
                                   Development
                                  Expenditures           Well Count
                                 ---------------         ----------
                                  (In millions)

Rocky Mountain region              $   95                    118
Mid-Continent region                   87                     90
Gulf Coast region                      41                     27
ArkLaTex region                        34                     81
Coalbed Methane                        26                    183
Permian Basin region                   10                     35
                                 ---------------         ----------
                                   $  293                    534
                                 ===============         ==========

                                      -26-



         We regularly review our capital expenditure budget to reflect changes
in current and projected cash flow, acquisition opportunities, debt requirements
and other factors. The above allocations are subject to change based on various
factors and results.

         The following table sets forth certain information regarding the costs
incurred by us in our oil and gas property acquisition, exploration and
development activities, whether capitalized or expensed.

                                                            Three Months Ended
                                                                March 31,
                                                      -----------------------------
                                                          2005              2004
                                                      ------------      -----------
                                                            (In thousands)
Development costs                                     $   53,246        $   34,446

Exploration costs                                         12,107             6,616
Acquisitions:
     Proved                                               39,324               694
     Unproved                                              2,246                 -
     Leasing activity                                      4,446             2,792
                                                      ------------      -----------
Total including asset retirement obligation
                                                      $  111,369        $   44,548
                                                      ============      ===========


         Our costs incurred for capital and exploration activities for the three
months ended March 31, 2005, increased $66.8 million or 150 percent compared to
the same period of 2004. This increase reflects our 2005 acquisition of Agate
and the planned increase in our drilling activity budget. We have $83.1 million
of our original allocated budget available for acquisitions in 2005.

         We continue to develop the coalbed methane reserves in our Hanging
Woman Basin project. We completed 20 wells during the first quarter, and
permitting is on schedule to complete approximately 150 wells for the year. We
have 154,000 net lease acres in the basin and are concentrating our initial
development on 80,000 net acres located in Wyoming. Outstanding legal challenges
filed by environmental public interest groups affect 47,000 net acres in Montana
relating to this project. See Legal Proceedings under Part II, Item 1 of this
report.

         We believe that internally generated cash flow together with our credit
facility will be sufficient to fund our expected operational, drilling and
acquisition expenditures for the foreseeable future. The amount and allocation
of future capital and exploration expenditures will depend upon a number of
factors including the number and size of available acquisition opportunities,
whether we can make an economic acquisition, and our ability to assimilate
acquisitions we make. Also, the impact of oil and gas prices on investment
opportunities, the availability of capital and borrowing facilities and the
success of our development and exploratory activities could lead to increased
funding requirements for further development.

Financing alternatives

         The debt and equity financing capital markets remain attractive to
energy companies that operate in the exploration and production segment. This is
a result of strong commodity prices and the general strength reflected in the
balance sheets of the companies in this segment. As our cash balance and
availability under our existing credit facility are significant, we are not
currently considering accessing the capital markets in 2005. However, if
additional development or attractive acquisition opportunities arise that exceed

                                      -27-



our currently available resources, we may consider other forms of financing,
including the public offering or private placement of equity or debt securities.

Sensitivity Analysis

         We are exposed to market risk, including the effects of changes in oil
and gas commodity prices, and interest rates as discussed below and under the
caption "Interest rate market risk." Since we produce and sell natural gas and
crude oil, our financial results can be affected when prices for these
commodities fluctuate. In order to reduce the impact of fluctuations in
commodity prices, we enter into hedging transactions as discussed below. Changes
in interest rates can affect the amount of interest we earn on our cash, cash
equivalents and short-term investments and the interest rate we pay on
borrowings under our revolving credit facility. Changes in interest rates do not
affect the interest we pay on our fixed rate convertible notes, but do affect
the fair value of that debt.

         Note 8 of Part I, Item 1 of this report contains important information
about our oil and gas derivative contracts, including the volumes and average
contract prices of hedges we currently have in place and have entered into
through April 29, 2005, and our interest rate derivative contracts. We
anticipate that all hedge and derivative contract transactions will occur as
expected.

         There has been no material change to the natural gas and crude oil
price sensitivity analysis previously disclosed. Please see the corresponding
section under Part II, Item 7 of our Annual Report on Form 10-K for the year
ended December 31, 2004.

Summary of oil and gas production hedges in place

         Our net realized oil and gas prices are impacted by hedges we have
placed on future forecasted transactions. We have historically entered into
hedges of existing production around the time we make acquisitions of producing
oil and gas properties. Our intent is to lock in a significant portion of an
equivalent amount of existing production to the prices we used to evaluate the
risked economics of our acquisition. We also hedge a small percentage of our
forecasted production on a discretionary basis.

         For swap contracts in place on March 31, 2005, a hypothetical increase
of 10 percent in future gas strip prices representing a $0.74 weighted-average
increase per MMBtu applied to a notional amount of 11.1 million MMBtu covered by
natural gas swaps would cause a decrease in the value of derivative instruments
of $8.2 million. A hypothetical increase of 10 percent in the future NYMEX strip
oil prices representing a $5.49 increase per Bbl applied to a notional amount of
1.6 MMBbl covered by crude oil swaps would cause an $8.7 million decrease in the
value of the derivative instruments.

         For collar contracts in place on March 31, 2005, a hypothetical
increase of 10 percent in future gas strip prices representing a $0.74
weighted-average increase per MMBTU applied to a notional amount of 1.3 million
MMBtu covered by natural gas collars would cause a $663,000 decrease in the
value of the derivative instruments.

         The effect of price increases would impact our hedge gain or loss
amounts. However, these are cash flow hedges with high correlation, and the
price we receive on the underlying oil and gas production would be higher by
approximately the same amount. The effect on our results of operations would be
minimal.

Summary of interest rate hedges in place

         We entered into fixed-rate to floating-rate interest rate swaps on
$50.0 million of convertible notes on October 3, 2003. Because of continuing
increases in interest rates, we entered into a floating-to-fixed interest rate
swap on April 13, 2005, through March 20, 2007, in on this same notional amount
of $50.0 million order to effectively offset our fixed-to-floating interest rate
swaps. Under the floating-to-fixed interest rate swap, St. Mary will be paid a
variable interest rate of 235 basis points above the six-month LIBOR rate as
determined on the semi-annual settlement date and will pay a fixed interest rate
of 6.85 percent. The payment dates of the swap match exactly with the interest
payment dates of our convertible notes and the fixed-to-floating interest rate
swaps. The impact of this instrument, when combined with the other interest rate
swaps, is that we have fixed our net liability related to the interest rate
swaps, and will pay a 1.1 percent interest factor on $50.0 million of notional
debt through March 2007.

                                      -28-



         These interest rate derivative instruments do not qualify for fair
value hedge treatment under Statement of Financial Accounting Standards No. 133,
"Accounting for Derivative Instruments and Hedging Activities" and are
consequently marked-to-market. Excluding accrued payments due to our
counterparts as of at March 31, 2005, the interest rate swaps had a fair value
liability of $1.1 million. Derivative loss (gain) in the consolidated statements
of operations for the quarter ended March 31, 2005, includes $676,000 of loss
related to the change in fair value. Derivative loss (gain) in the consolidated
statements of operations for the quarter ended March 31,2004, includes $834,000
of income related to the change in fair value. We anticipate that interest
expense in 2005 will be higher than in 2004.

Schedule of contractual obligations

         The following table summarizes our future estimated principal payments
and minimum lease payments for the periods specified (in millions):

                                                     Less than                                     More than
Contractual Obligations                  Total          1 year       1-3 years      3-5 years        5 years
- ----------------------------------     ---------     ----------      ---------      ---------      ---------

Long-Term Debt                         $  147.0      $     -         $  100.0       $   47.0       $    -
Operating Leases                            9.2            2.0            2.8            2.1            2.3
Other Long-Term Liabilities                19.1            1.8           14.7            1.3            1.3
                                       ---------     ----------      ---------      ---------      ---------
Total                                  $  175.3      $     3.8       $  117.5       $   50.4       $    3.6
                                       =========     ==========      =========      =========      =========

         This table includes our 2005 estimated pension liability payment of
approximately $1.1 million, but excludes the remaining unfunded portion of $1.8
million, as we cannot determine with accuracy the timing of future payments. The
table does not include estimated payments associated with our net profits plan.
We record a liability for the estimated future payments. However, predicting the
precise timing that the liability will be paid is contingent upon estimates of
appropriate discount factors adjusting for risk and time-value and upon a number
of factors that we cannot control. We have excluded asset retirement obligations
because we are not able to precisely predict the timing for these amounts. The
net profits plan, pension liabilities and asset retirement obligations are
discussed in Note 7, Note 8 and Note 9, respectively, of Part IV Item 15 of our
Form 10-K for the year ended December 31, 2004, and also in Note 5, Note 9 and
Note 10, respectively, of Part I Item 1 of this report.

         Three leases for office space will expire in year two and a fourth
office space lease will expire in year three. Estimated costs to replace these
leases are not included in the table above. For purposes of the table we assume
that the holders of our convertible notes will not exercise the conversion
feature. If the holders do exercise their conversion feature, we will not have
to repay the $100.0 million. However, our common shares outstanding would
increase by 7,692,307 shares.

         We have announced that we have effectively doubled our dividend from
prior years and we believe that we will continue to pay the semi-annual
dividend of $0.05 per share. We anticipate having sufficient cash to make
payments for income taxes, dependent on net income and capital spending.

Off-Balance Sheet Arrangements

         We do not have any off-balance sheet financing other than operating
leases, nor do we have any unconsolidated subsidiaries.

Critical Accounting Policies and Estimates

         We refer you to the corresponding section in Part II, Item 7 of our
Annual Report on Form 10-K for the year ended December 31, 2004.

                                      -29-



Additional Comparative Data in Tabular Format:

                                                                            Change Between the
                                                                            Three Months Ended
                                                                         -----------------------
Oil and Gas Production Revenues                                          March 31, 2005 and 2004
- -------------------------------                                          -----------------------
Increase in oil and gas production revenues, net of hedging                     $    47,323
       (In thousands)

Components of Revenue Increases:

Natural Gas
Realized price change per Mcf                                                   $      1.02
Realized price percentage change                                                        20%
Production change (MMcf)                                                                434
Production percentage change                                                             4%

Oil
Realized price change per Bbl                                                   $     17.17
Realized price percentage change                                                        61%
Production change (MBbl)                                                                293
Production percentage change                                                            26%

Our product mix as a percentage of total oil and gas revenue and production:

                                                                 Three Months Ended March 31,
                                                                --------------------------------
Revenue                                                           2005                  2004
- -------                                                         --------              --------
Natural Gas                                                        54%                  65%
Oil                                                                46%                  35%

Production
- ----------
Natural Gas                                                        58%                  63%
Oil                                                                42%                  37%

Information regarding the effects of oil and gas hedging activity:

                                                                 Three Months Ended March 31,
                                                                --------------------------------
Natural Gas Hedging                                                 2005                  2004
- -------------------                                             ------------           ---------
Percentage of gas production hedged                                         21%              32%
Natural gas MMBtu hedged                                        $   2.8 million   $  4.1 million
Increase (decrease) in gas revenue                              $   3.8 million   $ (3.1 million)
Average realized gas price per Mcf before hedging               $          5.90   $         5.48
Average realized gas price per Mcf after hedging                $          6.22   $         5.20

Oil Hedging
- -----------
Percentage of oil production hedged                                         18%              41%
Oil volumes hedged (MBbl)                                                   252              462
Decrease in oil revenue                                         $  (2.2 million)  $ (5.5 million)
Average realized oil price per Bbl before hedging               $         46.93   $        32.98
Average realized oil price per Bbl after hedging                $         45.37   $        28.20

                                      -30-



Information regarding the components of exploration expense:

                                                                     Three Months Ended March 31,
                                                                   ------------------------------
Summary of Exploration Expense (In millions)                          2005                 2004
- --------------------------------------------                       ----------           ---------
Geological and geophysical expenses                                $     2.0            $    0.7
Exploratory dry holes                                                    0.2                 0.2
Overhead and other expenses                                              4.9                 3.7
                                                                   ----------           ---------
                                                                   $     7.1            $    4.6
                                                                   ==========           =========

Comparison of Financial Results and Trends between the Quarters ended
March 31, 2005 and 2004

         Oil and Gas Production Revenue. Average net daily production increased
13 percent to a record 229.4 MMCFE for the quarter ended March 31, 2005,
compared with 202.8 MMCFE for the quarter ended March 31, 2004. The following
table presents specific components that contributed to the increase in revenue
for the first quarter of 2005 when compared to the first quarter of 2004:

                                                   Average Net Daily        Oil and Gas          Production
                                                       Production          Revenue Added        Costs Added
                                                      Added (MMCFE)         (Millions)           (Millions)
                                                   -----------------       -------------        -----------
Paggi-Broussard 1 (SM 40%)                                 11.0            $       6.8          $      0.5
Williston Basin Middle Bakken Play                          9.7                    7.6                 0.9
Other wells completed in 2004 and 2005                     35.7                   20.4                 2.1
Goldmark acquisition                                        4.2                    2.2                 1.0
Border acquisition                                          4.6                    2.3                 0.8
Agate acquisition                                           5.3                    2.3                 0.9
Other acquisitions                                          1.2                    0.7                 0.2
                                                   -----------------       -------------        -----------

Total                                                      71.7            $      42.3          $      6.4
                                                   =================       =============        ===========

         The increases in this table also reflect the difference in oil and gas
prices received between the comparable periods. Additional production costs
reflect increases resulting from inflation and competition for resources. These
increases are offset by natural declines in production from older properties to
result in the net increase in production between the quarters presented.

         Oil and Gas Production Expense. Total production costs increased $8.6
million, or 37 percent, to $32.2 million for the first quarter of 2005, from
$23.5 million in the comparable period of 2004. As noted in the table above,
completed wells and acquisitions in 2004 and 2005 have added $6.4 million of
incremental production costs in 2005. Additionally, we experienced an increase
in value-based production taxes consistent with an increase in revenue from
crude oil and natural gas due to higher prices.

         Total oil and gas production costs per MCFE increased $0.28 to $1.56
for 2005, compared with $1.28 for 2004. This increase is comprised of the
following:

         o    An $0.11 increase in production taxes due to higher revenue from
              crude oil in our Rocky Mountain and Permian regions;
         o    A $0.02 increase in production taxes due to higher revenue from
              natural gas in our Mid-Continent region;

                                      -31-



         o    A $0.06 increase in LOE reflecting a general 7 percent increase
              which we had forecast in our budget process that was caused by
              competition for resources;
         o    A $0.02 increase in LOE in our Gulf Coast region reflecting the
              effect of resolving certain LOE billing amounts in the first
              quarter that is not expected to have an impact in future periods.
         o    A $0.02 increase due to the start-up activity in our Hanging Woman
              Basin; and
         o    A $0.04 overall increase in LOE relating to workover charges.

         General and Administrative. General and administrative expenses
increased $409,000 or seven percent to $6.0 million for the quarter ended March
31, 2005, compared with $5.6 million for the comparable period of 2004. G&A
on a per MCFE basis remained relatively flat between periods as the increase in
G&A expense was offset by a corresponding increase in production.

         An increase in our employee count from January 1, 2004, to March 31,
2005, has resulted in an increase in base employee compensation of $305,000
between the first quarter of 2005 and the first quarter of 2004. Accounting fees
increased $158,000 between the same periods. A $1.5 million increase in expense
associated with our net profits plan and our restricted stock plan was offset by
COPAS overhead reimbursements and allocation of G&A to exploration expense.
COPAS overhead reimbursement from operations increased $456,000 due to an
increase in operated well count resulting from our drilling and acquisition
programs. The amount of G&A we allocated to exploration expense increased
$1.2 million due to incentive plan payment increases and increases in our
technical exploration staff.

         Change in net profits plan liability. For the quarter ended March 31,
2005, this expense increased to $4.2 million from $2.2 million for 2004. This
increase is due to the performance of individual pools and the effect of a
higher price environment. Adjustments to the liability are subject to estimation
and may change dramatically from year-to-year based on assumptions used for
production rates, reserve quantities, commodity pricing, discount rates, tax
rates, and production costs. Currently, our assessment of these factors results
in our concluding that this expense will be lower for all of 2005 than in 2004.

         Interest Expense. Interest expense increased by $456,000 to $1.9
million for 2005 compared to $1.5 million for 2004. The increase reflects
increasing interest rates and an increase in average borrowings under our credit
facility in first quarter of 2005 relative to the same period in the prior year.

         Income Taxes. Income tax expense totaled $20.7 million for the first
quarter of 2005 and $13.1 million for the first quarter of 2004, resulting in
effective tax rates of 37.1 percent and 37.9 percent, respectively. The
effective rate change from 2004 reflects changes in the composition of the
highest marginal state tax rates as a result of acquisition and drilling
activity, and other permanent differences including the estimated effect of the
domestic production activities deduction from the recently enacted American Jobs
Creation Act of 2004.

         The current portion of the income tax expense in 2005 is $10.4 million
compared to $5.9 million in 2004. These amounts are 50 percent and 45 percent of
the total tax for the respective periods. We increased our 2005 budget for
drilling expenditures over 2004 amounts but have not adjusted this amount during
the first quarter of 2005. Our projections are for larger increases in revenue
due to anticipated production and pricing. We now believe that current taxable
income and the resulting current portion of income tax as a percentage of total
income tax will be higher in 2005 than it was in 2004.

Accounting Matters

         We refer you to Note 2 and Note 5 of Part I, Item 1 of this report for
additional information.

                                      -32-



Environmental

         St. Mary's compliance with applicable environmental regulations has not
resulted in any significant capital expenditures or materially adverse effects
on our liquidity or results of operations. We believe that we are in substantial
compliance with environmental regulations, and we do not currently expect that
any material expenditures will be required in the foreseeable future. However,
we are unable to predict the impact that future compliance with regulations may
have on future capital expenditures, liquidity and results of operations.

Cautionary Statement About Forward - Looking Statements

         This Quarterly Report on Form 10-Q includes certain statements that may
be deemed to be "forward-looking statements" within the meaning of Section 27A
of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of
1934. All statements, other than statements of historical facts, included in
this Form 10-Q that address activities, events or developments that St. Mary's
management expects, believes or anticipates will or may occur in the future are
forward-looking statements. The words "will," "believe," "anticipate," "intend,"
"estimate," "expect," "project," and similar expressions are intended to
identify forward - looking statements, although not all forward - looking
statements contain such identifying words. Examples of forward-looking
statements may include discussion of such matters as:

         o    the amount and nature of future capital, development and
              exploration expenditures,
         o    the drilling of wells,
         o    reserve estimates and the estimates of both future net revenues
              and the present value of future net revenues that are included in
              their calculation,
         o    future oil and gas production estimates,
         o    repayment of debt,
         o    business strategies,
         o    expansion and growth of operations,
         o    recent legal developments, and
         o    other similar matters.

         These statements are based on certain assumptions and analyses made by
us in light of our experience and our perception of historical trends, current
conditions, expected future developments and other factors we believe are
appropriate under the circumstances. Such statements are subject to a number of
assumptions, risks and uncertainties, including such factors as the volatility
and level of oil and natural gas prices, unexpected drilling conditions and
results, production rates and reserve replacement, the imprecise nature of oil
and gas reserve estimates, drilling and operating service availability and
risks, uncertainties in cash flow, the financial strength of hedge contract
counterparties, the availability of attractive exploration, development and
property acquisition opportunities, financing requirements, expected acquisition
benefits, competition, litigation, environmental matters, the potential impact
of government regulations, and other matters discussed in the "Risk Factors"
section of our 2004 Annual Report on Form 10-K. Readers are cautioned that
forward-looking statements are not guarantees of future performance and that
actual results or developments may differ materially from those expressed or
implied in the forward-looking statements. Although we may from time to time
voluntarily update our prior forward - looking statements, we disclaim any
commitment to do so except as required by securities laws.

                                      -33-





ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

         The information required by this item is provided under the captions
"Interest Rate Market Risk" and "Sensitivity Analysis" in Item 2 above and is
incorporated herein by reference.

ITEM 4.  CONTROLS AND PROCEDURES

         We maintain a system of disclosure controls and procedures that are
designed for the purposes of ensuring that information required to be disclosed
in our SEC reports is recorded, processed, summarized and reported within the
time periods specified in the SEC's rules and forms, and that such information
is accumulated and communicated to our management, including the Chief Executive
Officer and the Vice-President - Finance, as appropriate to allow timely
decisions regarding required disclosure.

         We carried out an evaluation, under the supervision and with the
participation of our management, including the Chief Executive Officer and the
Vice-President - Finance, of the effectiveness of the design and operation of
our disclosure controls and procedures as of the end of the period covered by
this Quarterly Report on Form 10-Q. Based upon that evaluation, the Chief
Executive Officer and the Vice-President - Finance concluded that our disclosure
controls and procedures are effective for the purposes discussed above as of the
end of the period covered by this Quarterly Report on Form 10-Q. There was no
significant change in our internal control over financial reporting that
occurred during our most recent fiscal quarter that has materially affected, or
is reasonably likely to materially affect, our internal control over financial
reporting.

PART II.  OTHER INFORMATION


ITEM 1.  LEGAL PROCEEDINGS

         From time to time, we may be involved in litigation relating to claims
arising out of our operations in the normal course of business. As of the date
of this report, no legal proceedings are pending against us that we believe
individually or collectively could have a material adverse effect upon our
financial condition or results of operations.

         As previously reported, Nance Petroleum Corporation, a wholly owned
subsidiary, is named along with several other leaseholders and interested
parties as an additional co-defendant in a lawsuit that was originally filed in
the U.S. District Court for the District of Montana on June 12, 2001. The
plaintiff, the Northern Plains Resource Council, Inc.("NPRC"), an environmental
public interest group, sued the U.S. Bureau of Land Management ("BLM"), the U.S.
Secretary of the Interior, the Montana BLM State Director and Fidelity
Exploration & Production Company. The lawsuit seeks the cancellation of all
federal leases related to coalbed methane development in Montana issued by the
BLM since January 1, 1997. This cancellation is sought primarily on the grounds
of an alleged failure of the BLM to comply with federal environmental laws. NPRC
alleges that the environmental impacts of coalbed methane development were not
properly analyzed before the challenged leases were issued. The Montana portion
of our Hanging Woman Basin coalbed methane project contains approximately 74,000
total net acres. The lawsuit potentially affects approximately 47,000 net acres
that are subject to federal leases. Based on information presently available, we
believe that the BLM complied with the applicable environmental laws, and the
District Court agreed by granting the defendants' motion for summary judgment in
December 2003. The court held that the issuance process regarding the federal
leases in question complied with the applicable environmental laws. The
plaintiff appealed this decision, and the Ninth Circuit Court of Appeals
affirmed the decision of the trial court on August 26, 2004. Plaintiff filed a
petition for rehearing that was denied by the reviewing panel by its Order dated
February 10, 2005. The only appeal left for the Plaintiffs is to petition for
certiorari to the U.S Supreme Court. Notwithstanding our success in the lower
court and the appellate court, there is no assurance as to the ultimate outcome

                                      -34-



of the lawsuit, and therefore, there is no assurance that it will not adversely
affect our coalbed methane project. Even if the federal leases in Montana become
unavailable, we are proceeding with this project on non-federal leases in
Wyoming, and we anticipate acquiring additional non-federal leases in Montana
and Wyoming.

ITEM 6.  Exhibits

         The following exhibits are furnished as part of this report:

         Exhibit Description
         ------- -----------
         10.1*   Amended and Restated Credit Agreement dated April 7, 2005
                 among St. Mary Land & Exploration Company, Wachovia Bank,
                 National Association as Administrative Agent, and the Lenders
                 party thereto
         10.2*   Amended and Restated Guaranty Agreement by St. Mary Energy
                 Company in favor of Wachovia Bank, National Association, as
                 Administrative Agent, dated April 7, 2005
         10.3*   Amended and Restated Guaranty Agreement by Nance Petroleum
                 Corporation in favor of Wachovia Bank, National Association,
                 as Administrative Agent, dated April 7, 2005
         10.4*   Amended and Restated Guaranty Agreement by NPC Inc. in favor
                 of Wachovia Bank, National Association, as Administrative
                 Agent, dated April 7, 2005
         10.5*   Amended and Restated Pledge and Security Agreement between
                 St. Mary Land & Exploration Company and Wachovia Bank,
                 National Association, as Administrative Agent, dated
                 April 7, 2005
         10.6*   Amended and Restated Pledge and Security Agreement between
                 Nance Petroleum Corporation and Wachovia Bank, National
                 Association, as Administrative Agent, dated April 7, 2005
         10.7*   Supplement and Amendment to Deed of Trust, Mortgage, Line of
                 Credit Mortgage, Assignment, Security Agreement, Fixture
                 Filing and Financing Statement for the benefit of Wachovia
                 Bank, National Association, as Administrative Agent,
                 dated effective as of April 7, 2005
         10.8*   Deed of Trust to Wachovia Bank, National Association, as
                 Administrative Agent, dated effective as of April 7, 2005
         31.1*   Certification of Chief Executive Officer pursuant to
                 Section 302 of the Sarbanes - Oxley Act of 2002
         31.2*   Certification of Vice President - Finance pursuant to Section
                 302 of the Sarbanes - Oxley Act of 2002
         32.1*   Certification pursuant to U.S.C. Section 1350 as adopted
                 pursuant to Section 906 of the Sarbanes - Oxley Act of 2002
         -------------------------
         * Filed with this Form 10-Q.

                                      -35-



SIGNATURES
- ----------

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                     ST. MARY LAND & EXPLORATION COMPANY


May 4, 2005                          By:   /s/ MARK A. HELLERSTEIN
                                           -----------------------
                                           Mark A. Hellerstein
                                           President and Chief Executive Officer


May 4, 2005                          By:   /s/ DAVID W. HONEYFIELD
                                           -----------------------
                                           David W. Honeyfield
                                           Vice President - Finance, Secretary
                                           and Treasurer


May 4, 2005                          By:   /s/ GARRY A. WILKENING
                                           ----------------------
                                           Garry A. Wilkening
                                           Vice President - Administration and
                                           Controller

                                      -36-

EX-10

                                                                    EXHIBIT 10.1


                                                                  EXECUTION COPY


                      Amended and Restated Credit Agreement

                                   Dated as of

                                  April 7, 2005

                                      among

                    St. Mary Land & Exploration Company,
                                  as Borrower,

                      Wachovia Bank, National Association,
                            as Administrative Agent,


                             Wells Fargo Bank, N.A.,
                              As Syndication Agent,


                                  BNP Paribas,
                             Comerica Bank - Texas,
                                       and
                           JPMorgan Chase Bank, N.A.,
                           As Co-Documentation Agents,


                                       and

                            The Lenders Party Hereto

                                      with

                           Wachovia Securities, Inc.,
                           As Joint Lead Arranger and
                                 Sole Bookrunner


                                       and
                             Wells Fargo Bank, N.A.,
                             As Joint Lead Arranger


                           $500,000,000 Senior Secured
                            Revolving Credit Facility



                                TABLE OF CONTENTS

                                                                           Page
                                                                           ----

ARTICLE I DEFINITIONS AND ACCOUNTING MATTERS...................................1
Section 1.01         Terms Defined Above.......................................1
Section 1.02         Certain Defined Terms.....................................1
Section 1.03         Types of Loans and Borrowings............................19
Section 1.04         Terms Generally..........................................19
Section 1.05         Accounting Terms and Determinations; GAAP................20


ARTICLE II THE CREDITS........................................................20
Section 2.01         Commitments..............................................20
Section 2.02         Loans and Borrowings.....................................20
Section 2.03         Requests for Borrowings..................................21
Section 2.04         Interest Elections.......................................22
Section 2.05         Funding of Borrowings....................................24
Section 2.06         Termination, Reduction and Increase of Aggregate
                        Commitment............................................24
Section 2.07         Borrowing Base...........................................26
Section 2.08         Letters of Credit........................................29


ARTICLE III PAYMENTS OF PRINCIPAL AND INTEREST; PREPAYMENTS; FEES..............33
Section 3.01         Repayment of Loans........................................33
Section 3.02         Interest..................................................33
Section 3.03         Alternate Rate of Interest................................34
Section 3.04         Prepayments...............................................34
Section 3.05         Fees......................................................36


ARTICLE IV PAYMENTS; PRO RATA TREATMENT; SHARING OF SET-OFFS..................37
Section 4.01         Payments Generally; Pro Rata Treatment;
                        Sharing of Set-offs...................................37
Section 4.02         Presumption of Payment by the Borrower...................38
Section 4.03         Certain Deductions by the Administrative Agent...........38
Section 4.04         Disposition of Proceeds..................................39


ARTICLE V INCREASED COSTS; BREAK FUNDING PAYMENTS; TAXES; ILLEGALITY..........39
Section 5.01         Increased Costs..........................................39
Section 5.02         Break Funding Payments...................................40
Section 5.03         Taxes....................................................41
Section 5.04         Designation of Different Lending Office..................42
Section 5.05         Illegality...............................................42
Section 5.06         Replacement of Lenders...................................42


ARTICLE VI CONDITIONS PRECEDENT...............................................43

                                       i



Section 6.01         Effective Date...........................................43
Section 6.02         Each Credit Event........................................45


ARTICLE VII REPRESENTATIONS AND WARRANTIES....................................46
Section 7.01         Organization; Powers.....................................46
Section 7.02         Authority; Enforceability................................46
Section 7.03         Approvals; No Conflicts..................................46
Section 7.04         Financial Condition; No Material Adverse Change..........47
Section 7.05         Litigation...............................................47
Section 7.06         Environmental Matters....................................48
Section 7.07         Compliance with the Laws and Agreements; No Defaults.....49
Section 7.08         Investment Company Act...................................49
Section 7.09         Public Utility Holding Company Act.......................49
Section 7.10         Taxes....................................................49
Section 7.11         ERISA....................................................49
Section 7.12         Disclosure; No Material Misstatements....................50
Section 7.13         Insurance................................................51
Section 7.14         Restriction on Liens.....................................51
Section 7.15         Subsidiaries.............................................51
Section 7.16         Location of Business and Offices.........................51
Section 7.17         Properties; Titles, Etc..................................52
Section 7.18         Maintenance of Properties................................53
Section 7.19         Gas Imbalances, Prepayments..............................53
Section 7.20         Marketing of Production..................................53
Section 7.21         Swap Agreements..........................................54
Section 7.22         Use of Loans and Letters of Credit.......................54
Section 7.23         Solvency.................................................54
Section 7.24         Material Agreements......................................54


ARTICLE VIII AFFIRMATIVE COVENANTS............................................54
Section 8.01         Financial Statements; Ratings Change; Other Information..55
Section 8.02         Notices of Material Events...............................57
Section 8.03         Existence; Conduct of Business...........................57
Section 8.04         Payment of Obligations...................................57
Section 8.05         Performance of Obligations under Loan Documents..........58
Section 8.06         Operation and Maintenance of Properties..................58
Section 8.07         Insurance................................................59
Section 8.08         Books and Records; Inspection Rights.....................59
Section 8.09         Compliance with Laws.....................................59
Section 8.10         Environmental Matters....................................59
Section 8.11         Further Assurances.......................................60
Section 8.12         Reserve Reports..........................................61
Section 8.13         Title Information........................................62
Section 8.14         Additional Collateral; Additional Guarantors.............62
Section 8.15         ERISA Compliance.........................................63
Section 8.16         Performance of Material Agreements.......................64

                                       ii




ARTICLE IX NEGATIVE COVENANTS.................................................64
Section 9.01         Financial Covenants......................................64
Section 9.02         Debt.....................................................64
Section 9.03         Liens....................................................65
Section 9.04         Dividends, Distributions and Redemptions.................65
Section 9.05         Investments, Loans and Advances..........................66
Section 9.06         Designation of Material Subsidiaries.....................67
Section 9.07         Nature of Business; International Operations.............67
Section 9.08         Limitation on Leases.....................................67
Section 9.09         Proceeds of Notes........................................67
Section 9.10         ERISA Compliance.........................................68
Section 9.11         Sale or Discount of Receivables..........................69
Section 9.12         Mergers, Etc.............................................69
Section 9.13         Sale of Properties.......................................69
Section 9.14         Environmental Matters....................................70
Section 9.15         Transactions with Affiliates.............................70
Section 9.16         Subsidiaries.............................................70
Section 9.17         Negative Pledge Agreements; Dividend Restrictions........70
Section 9.18         Gas Imbalances, Take-or-Pay or Other Prepayments.........70
Section 9.19         Swap Agreements..........................................71
Section 9.20         Preservation of Material Agreements......................71
Section 9.21         Release of Liens.........................................71


ARTICLE X EVENTS OF DEFAULT; REMEDIES.........................................72
Section 10.01        Events of Default........................................72
Section 10.02        Remedies.................................................74


ARTICLE XI THE ADMINISTRATIVE AGENT...........................................74
Section 11.01        Appointment; Powers......................................74
Section 11.02        Duties and Obligations of Administrative Agent...........75
Section 11.03        Action by Administrative Agent...........................75
Section 11.04        Reliance by Administrative Agent.........................76
Section 11.05        Subagents................................................76
Section 11.06        Resignation or Removal of Administrative Agent...........76
Section 11.07        Administrative Agent as  Lenders.........................77
Section 11.08        No Reliance..............................................77
Section 11.09        Authority of Administrative Agent to Release
                        Collateral and Liens..................................77
Section 11.10        Syndication Agent and Co-Documentation Agents............78


ARTICLE XII MISCELLANEOUS.....................................................78
Section 12.01        Notices..................................................78
Section 12.02        Waivers; Amendments......................................79
Section 12.03        Expenses, Indemnity; Damage Waiver.......................80
Section 12.04        Successors and Assigns...................................82
Section 12.05        Survival; Revival; Reinstatement.........................85
Section 12.06        Counterparts; Integration; Effectiveness.................86

                                      iii



Section 12.07        Severability.............................................86
Section 12.08        Right of Setoff..........................................86
Section 12.09        GOVERNING LAW; JURISDICTION; CONSENT TO
                        SERVICE OF PROCESS....................................87
Section 12.10        Headings.................................................88
Section 12.11        Confidentiality..........................................88
Section 12.12        Interest Rate Limitation.................................89
Section 12.13        EXCULPATION PROVISIONS...................................90
Section 12.14        Existing Credit Agreement................................90
Section 12.15        USA Patriot Act Notice...................................90

         Annex I..         List of Commitments

         Exhibit A         Form of Note
         Exhibit B         Form of Compliance Certificate
         Exhibit           C Form of Legal Opinion of Ballard Spahr
                           Andrews & Ingersoll, LLP, special
                           counsel to the Borrower and the Guarantors
         Exhibit D-1       Security Instruments
         Exhibit D-2       Form of Guaranty Agreement
         Exhibit D-3       Form of Pledge - Borrower
         Exhibit D-4       Form of Pledge - Nance
         Exhibit E         Form of Assignment and Assumption
         Exhibit F-1       Form of Commitment Increase Certificate
         Exhibit F-2       Form of Additional Lender Certificate


         Schedule 7.05     Litigation
         Schedule 7.15     Subsidiaries and Partnerships;
                           Non-Material Subsidiaries
         Schedule 7.19     Gas Imbalances
         Schedule 7.20     Marketing Contracts
         Schedule 7.21     Swap Agreements
         Schedule 7.24     Material Agreements
         Schedule 9.05(a)  Investments
         Schedule 9.05(h)  Existing Investments (Non-Oil and Gas)

                                       iv




          THIS AMENDED AND RESTATED CREDIT AGREEMENT dated as of April 7, 2005,
is by and among ST. MARY LAND & EXPLORATION COMPANY, a corporation duly
formed and existing under the laws of the State of Delaware (the "Borrower");
                                                                  --------
each of the Lenders from time to time party hereto; WACHOVIA BANK, NATIONAL
ASSOCIATION (in its individual capacity, "Wachovia"), as administrative agent
                                          --------
for the Lenders (in such capacity, together with its successors in such
capacity, the "Administrative Agent") WELLS FARGO BANK, N.A., as Syndication
               --------------------
Agent; and BNP PARIBAS, COMERICA BANK-TEXAS, and JPMORGAN CHASE BANK, N.A., as
Co-Documentation Agents.

          The parties hereto agree as follows:

                                   ARTICLE I
                       Definitions and Accounting Matters


     Section 1.01 Terms  Defined  Above.  As  used in this  Amended and Restated
                  ---------------------
Credit Agreement, each term defined above has the meaning indicated above.

     Section 1.02 Certain  Defined  Terms.  As used in this Amended and Restated
                  -----------------------
Credit Agreement, the following terms have the meanings specified below:

     "ABR",  when used in reference to any Loan or Borrowing,  refers to whether
      ---
such Loan, or the Loans  comprising  such Borrowing,  are bearing  interest at a
rate determined by reference to the Alternate Base Rate.

     "Additional  Lender"  has the  meaning  assigned  to such  term in  Section
      ------------------
2.06(c)(i).

     "Additional  Lender  Certificate"  has the meaning assigned to such term in
      -------------------------------
Section 2.06(c)(ii)F.

     "Adjusted LIBO Rate" means,  with respect to any  Eurodollar  Borrowing for
      ------------------
any Interest Period, an interest rate per annum (rounded upwards,  if necessary,
to the next  1/16 of 1%)  equal to (a) the LIBO  Rate for such  Interest  Period
multiplied by (b) the Statutory Reserve Rate.

     "Administrative  Questionnaire" means an Administrative  Questionnaire in a
      -----------------------------
form supplied by the Administrative Agent.

     "Affected Loans" has the meaning assigned such term in Section 5.05.
      --------------

     "Affiliate" means, with respect to a specified Person,  another Person that
      ---------
directly,  or  indirectly  through  one or more  intermediaries,  Controls or is
Controlled by or is under common Control with the Person specified.

     "Aggregate  Commitment"  at any time  means  the  aggregate  amount  of the
      ---------------------
Commitments of all the Lenders, as reduced, increased or terminated from time to
time pursuant to the terms hereof;  provided that the Aggregate Commitment shall
                                    -------- ----
not at any time exceed the Maximum Credit Amount; and provided further that, the
                                                      -------- ------- ----



initial Aggregate  Commitment  hereunder is $200,000,000 for the period from and
including the  Effective  Date to but excluding the date such amount is reduced,
increased or terminated pursuant to the terms hereof.

     "Aggregate  Revolving  Credit  Exposures"  at any time means the  aggregate
      ---------------------------------------
amount of the Revolving Credit Exposures of all of the Lenders.

     "Agreement" means this Amended and Restated Credit  Agreement,  as the same
      ---------
may from time to time be amended, modified, supplemented or restated.

     "Alternate  Base Rate"  means,  for any day, a rate per annum  equal to the
      --------------------
greater  of (a) the Prime  Rate in effect on such day or (b) the  Federal  Funds
Effective Rate in effect on such day plus 1/2 of 1%. Any change in the Alternate
Base Rate due to a change in the Prime Rate or the Federal Funds  Effective Rate
shall be effective  from and including the effective  date of such change in the
Prime Rate or the Federal Funds Effective Rate, respectively.

     "Applicable  Margin"  means,  for any day,  with respect to any ABR Loan or
      ------------------
Eurodollar  Loan, or with respect to any commitment fees payable  hereunder,  as
the case may be, the rate per annum set forth in the Borrowing Base  Utilization
Grid below based upon the Borrowing Base Utilization Percentage then in effect:

                         Borrowing Base Utilization Grid
    --------------------------- ------------ ------------- ------------ -------------
    Borrowing Base
    Utilization
    Percentage                      <50%       >50% <75%     >75% <90%       >90%
    --------------------------- ------------ ------------- ------------ -------------
    Eurodollar Loans                1.000%       1.250%        1.500%       1.750%
    --------------------------- ------------ ------------- ------------ -------------
    ABR Loans                       0.000%       0.000%        0.250%       0.500%
    --------------------------- ------------ ------------- ------------ -------------
    Commitment Fee
    Rate                            0.250%       0.300%        0.375%       0.375%
    --------------------------- ------------ ------------- ------------ -------------

     Each  change  in the  Applicable  Margin  shall  apply  during  the  period
commencing  on the  effective  date  of  such  change  and  ending  on the  date
immediately  preceding  the  effective  date of the next such change,  provided,
however,  that if at any time the  Borrower  fails to  deliver a Reserve  Report
pursuant  to Section  8.12(a),  then until  such time as the  Reserve  Report is
delivered the "Applicable Margin" means the rate per annum set forth on the grid
               -----------------
when the Borrowing Base Utilization Percentage is at its highest level.

     "Applicable  Percentage"  means, with respect to any Lender, the percentage
      ----------------------
of the Aggregate  Commitments  represented  by such Lender's  Commitment as such
percentage is set forth on Annex I.

     "Approved  Counterparty"  means (a) any Lender or any Affiliate of a Lender
      ----------------------
and (b) any  other  Person  whose  long term  senior  unsecured  debt  rating is
BBB+/Baa1 by S&P or Moody's (or their equivalent) or higher.

     "Approved  Fund" means (a) a CLO and (b) with respect to any Lender that is
      --------------
a fund which invests in bank loans and similar  extensions of credit,  any other
fund that invests in bank loans and similar  extensions of credit and is managed
by the  same  investment  advisor  as such  Lender  or by an  Affiliate  of such
investment advisor.

                                       2



     "Approved   Petroleum   Engineers"  means  (a)  Netherland,   Sewell  &
      --------------------------------
Associates,  Inc., (b) Ryder Scott Company Petroleum  Consultants,  L.P. and (c)
any  other  independent   petroleum  engineers  reasonably   acceptable  to  the
Administrative Agent.

     "Assignment and Assumption" means an assignment and assumption entered into
      -------------------------
by a Lender and an  assignee  (with the  consent of any party  whose  consent is
required by Section 12.04(b)),  and accepted by the Administrative Agent, in the
form of Exhibit E or any other form approved by the Administrative Agent.

     "Availability  Period"  means the period from and  including  the Effective
      --------------------
Date to but excluding the Termination Date.

     "Board" means the Board of Governors of the Federal  Reserve  System of the
      -----
United States of America or any successor Governmental Authority.

     "Borrowing"  means Loans of the same Type, made,  converted or continued on
      ---------
the  same  date  and,  in the  case of  Eurodollar  Loans,  as to which a single
Interest Period is in effect.

     "Borrowing Base" means at any time an amount equal to the amount determined
      --------------
in  accordance  with Section 2.07, as the same may be adjusted from time to time
pursuant to Section 8.13(c), Section 9.12(a), Section 9.13 or Section 9.21.

     "Borrowing Base Utilization  Percentage" means, as of any day, the fraction
      --------------------------------------
expressed as a percentage,  the  numerator of which is the  Aggregate  Revolving
Credit Exposures of the Lenders on such day, and the denominator of which is the
Borrowing Base in effect on such day.

     "Borrowing  Request"  means a request by the  Borrower  for a Borrowing  in
      ------------------
accordance with Section 2.03.

     "Business Day" means any day that is not a Saturday, Sunday or other day on
      ------------
which  commercial  banks in  Charlotte,  North  Carolina or  Houston,  Texas are
authorized  or  required by law to remain  closed;  and if such day relates to a
Borrowing  or  continuation  of, a payment  or  prepayment  of  principal  of or
interest  on,  or a  conversion  of or  into,  or the  Interest  Period  for,  a
Eurodollar  Loan or a notice by the Borrower with respect to any such  Borrowing
or continuation,  payment,  prepayment,  conversion or Interest Period,  any day
which is also a day on which dealings in dollar  deposits are carried out in the
London interbank market.

     "Capital  Leases" means,  in respect of any Person,  all leases which shall
      ---------------
have been,  or should have been, in  accordance  with GAAP,  recorded as capital
leases  on the  balance  sheet  of the  Person  liable  (whether  contingent  or
otherwise) for the payment of rent thereunder.

     "Casualty  Event" means any  uninsured  loss,  uninsured  casualty or other
      ---------------
uninsured  damage  to, or any  nationalization,  taking  under  power of eminent
domain or by condemnation or similar proceeding of, any Property of the Borrower
or any of its  Material  Subsidiaries  having a fair  market  value in excess of
$1,000,000.

     "Change in Control"  means (a) the  acquisition  of ownership,  directly or
      -----------------
indirectly,  beneficially  or of  record,  by any  Person or group  (within  the
meaning  of the  Securities  Exchange  Act of  1934  and  the  rules  of the SEC

                                       3



thereunder as in effect on the date hereof),  of Equity  Interests  representing
more than 30% of the aggregate  ordinary voting power  represented by the issued
and outstanding  Equity Interests of the Borrower,  (b) occupation of a majority
of the seats (other than vacant seats) on the board of directors of the Borrower
by Persons  who were  neither (i)  nominated  by the board of  directors  of the
Borrower nor (ii) appointed by directors so nominated or (c) the  acquisition of
direct or indirect Control of the Borrower by any Person or group.

     "Change in Law" means (a) the adoption of any law, rule or regulation after
      -------------
the date of this Agreement,  (b) any change in any law, rule or regulation or in
the  interpretation or application  thereof by any Governmental  Authority after
the date of this  Agreement or (c)  compliance by any Lender or the Issuing Bank
(or, for purposes of Section  5.01(b)),  by any lending office of such Lender or
by such  Lender's  or the  Issuing  Bank's  holding  company,  if any)  with any
request,  guideline or directive (whether or not having the force of law) of any
Governmental Authority made or issued after the date of this Agreement.

     "CLO"  means any  entity  (whether  a  corporation,  partnership,  trust or
      ---
otherwise) that is engaged in making, purchasing, holding or otherwise investing
in bank loans and similar  extensions  of credit in the  ordinary  course of its
business  and is  administered  or managed by a Lender or an  Affiliate  of such
Lender.

     "Code"  means the Internal  Revenue  Code of 1986,  as amended from time to
      ----
time, and any successor statute.

     "Commitment"  means,  with respect to each Lender,  the  commitment of such
      ----------
Lender  to make  Loans  and to  acquire  participations  in  Letters  of  Credit
hereunder,  expressed as an amount  representing the maximum aggregate amount of
such Lender's Revolving Credit Exposure hereunder, as such commitment may be (a)
modified  from time to time  pursuant to Section 2.06 and (b) modified from time
to time  pursuant  to  assignments  by or to such  Lender  pursuant  to  Section
12.04(b).  The amount representing each Lender's Commitment shall at any time be
the lesser of such Lender's Applicable  Percentage of the Aggregate  Commitment.
The  amount of each  Lender's  initial  Commitment  is set forth  opposite  such
Lender's name on Annex I under the caption "Commitment."

     "Commitment  Fee  Rate" has the  meaning  set  forth in the  definition  of
      ---------------------
"Applicable Margin".
 -----------------

     "Commitment Increase  Certificate" has the meaning assigned to such term in
      --------------------------------
Section 2.06(c)(ii)E.

     "Consolidated  Net  Income"  means  with  respect to the  Borrower  and the
      -------------------------
Consolidated  Subsidiaries,  for any period, the aggregate of the net income (or
loss) of the Borrower and the  Consolidated  Subsidiaries  after  allowances for
taxes for such period  determined on a  consolidated  basis in  accordance  with
GAAP;  provided that there shall be excluded from such net income (to the extent
otherwise  included therein) the following:  (a) the net income of any Person in
which  the  Borrower  or any  Consolidated  Subsidiary  has an  interest  (which
interest  does not cause the net income of such other Person to be  consolidated

                                       4



with  the net  income  of the  Borrower  and the  Consolidated  Subsidiaries  in
accordance  with  GAAP),  except to the  extent of the  amount of  dividends  or
distributions  actually  paid in cash during such period by such other Person to
the Borrower or to a  Consolidated  Subsidiary,  as the case may be; (b) the net
income (but not loss) during such period of any  Consolidated  Subsidiary to the
extent that the declaration or payment of dividends or similar  distributions or
transfers or loans by that Consolidated  Subsidiary is not at the time permitted
by  operation  of the  terms of its  charter  or any  agreement,  instrument  or
Governmental  Requirement  applicable  to  such  Consolidated  Subsidiary  or is
otherwise  restricted or prohibited,  in each case determined in accordance with
GAAP;  (c) any non-cash  gains or losses  during such  period;  (d) any gains or
losses attributable to writeups or writedowns of assets,  including  impairments
of oil  and  gas  properties;  (e)  mark-to-market  adjustments  related  to the
utilization  of  derivative  instruments;  and  (f)  changes  in  the  liability
associated  with the future  payments of amounts under the Net Profits  Interest
Bonus Plan.

     "Consolidated  Subsidiaries" means each Subsidiary of the Borrower (whether
      --------------------------
now existing or hereafter created or acquired) the financial statements of which
shall be (or should have been) consolidated with the financial statements of the
Borrower in accordance with GAAP.

     "Control"  means the  possession,  directly or indirectly,  of the power to
      -------
direct or cause the direction of the management or policies of a Person, whether
through  the  ability to  exercise  voting  power,  by  contract  or  otherwise.
"Controlling" and "Controlled" have meanings correlative thereto.
 -----------       ----------

     "Debt"  means,  for  any  Person,   the  sum  of  the  following   (without
      ----
duplication): (a) all obligations of such Person for borrowed money or evidenced
by bonds, bankers' acceptances,  debentures, notes or other similar instruments;
(b) all obligations of such Person (whether  contingent or otherwise) in respect
of letters of credit,  surety or other  bonds and similar  instruments;  (c) all
accounts  payable,  accrued  expenses,  liabilities or other obligations of such
Person to pay the  deferred  purchase  price of  Property or  services;  (d) all
obligations  under Capital Leases;  (e) all obligations  under Synthetic Leases;
(f) all Debt (as  defined  in the other  clauses of this  definition)  of others
secured by a Lien on any  Property of such  Person,  whether or not such Debt is
assumed by such  Person;  (g) all Debt (as defined in the other  clauses of this
definition)  of  others  guaranteed  by such  Person  or in  which  such  Person
otherwise  assures a creditor against loss of the Debt (howsoever such assurance
shall be made) to the  extent of the  lesser of the  amount of such Debt and the
maximum  stated  amount of such  guarantee or assurance  against  loss;  (h) all
obligations or undertakings of such Person to maintain or cause to be maintained
the  financial  position  or  covenants  of  others or to  purchase  the Debt or
Property of others; (i) obligations to deliver  commodities,  goods or services,
including,  without  limitation,  Hydrocarbons,  in consideration of one or more
advance payments,  other than gas balancing  arrangements in the ordinary course
of business;  (j)  obligations to pay for goods or services  whether or not such
goods or services are actually received or utilized by such Person; (k) any Debt
of a  partnership  for  which  such  Person is liable  either by  agreement,  by
operation of law or by a Governmental Requirement but only to the extent of such
liability;  (l) Disqualified  Capital Stock; and (m) the undischarged balance of
any production  payment created by such Person or for the creation of which such
Person  directly or indirectly  received  payment.  The Debt of any Person shall
include all  obligations of such Person of the character  described above to the
extent such Person  remains  legally liable in respect  thereof  notwithstanding

                                       5



that any such  obligation  is not  included as a liability  of such Person under
GAAP;  provided,   however,  the  contingent  obligations  of  Borrower  or  any
Subsidiary  of  Borrower  pursuant to any  purchase  and sale  agreement,  stock
purchase  agreement,  merger agreement or similar agreement shall not constitute
"Debt" within this  definition so long as none of same contains an obligation to
pay money over time. It is hereby  understood and agreed that in calculating the
amount of Debt in respect of borrowed money, the effect of Financial  Accounting
Standards Board Statement No. 133 shall be disregarded.

     "Default"  means  any  event or  condition  which  constitutes  an Event of
      -------
Default or which  upon  notice,  lapse of time or both  would,  unless  cured or
waived, become an Event of Default.

     "Disqualified  Capital Stock" means any Equity  Interest that, by its terms
      ---------------------------
(or by the terms of any security into which it is convertible or for which it is
exchangeable)  or upon the  happening  of any event,  matures or is  mandatorily
redeemable for any consideration  other than other Equity Interests (which would
not  constitute   Disqualified  Capital  Stock),  pursuant  to  a  sinking  fund
obligation  or  otherwise,  or  is  convertible  or  exchangeable  for  Debt  or
redeemable for any consideration  other than other Equity Interests (which would
not constitute  Disqualified Capital Stock) at the option of the holder thereof,
in whole or in part,  on or prior to the date that is one year after the earlier
of (a) the  Maturity  Date and (b) the  date on which  there  are no  Loans,  LC
Exposure or other obligations  hereunder  outstanding and all of the Commitments
are terminated.

     "dollars" or "$" refers to lawful money of the United States of America.
      -------

     "EBITDA" means, for any period, the sum of Consolidated Net Income for such
      ------
period  plus the  following  expenses  or charges to the  extent  deducted  from
Consolidated  Net  Income  in  such  period:  interest,   taxes,   depreciation,
depletion,  amortization,  noncash impairment charges and other noncash charges,
minus all noncash  income  added to  Consolidated  Net Income.  Noncash  charges
include  mark-to-market  adjustments  related to the  utilization  of derivative
instruments and changes in the liability  associated with the future payments of
amounts under the Net Profits Interest Bonus Plan.

     "Effective  Date"  means  the date on which  the  conditions  specified  in
      ---------------
Section 6.01 are satisfied (or waived in accordance with Section 12.02).

     "Engineering  Reports"  has the  meaning  assigned  such  term  in  Section
      --------------------
2.07(c)(i).

     "Environmental Laws" means any and all Governmental Requirements pertaining
      ------------------
in any way to health, safety, the environment or the preservation or reclamation
of  natural  resources,  in  effect  in any and all  jurisdictions  in which the
Borrower or any Subsidiary is conducting or at any time has conducted  business,
or where any Property of the Borrower or any  Subsidiary  is located,  including
without limitation, the Oil Pollution Act of 1990 ("OPA"), as amended, the Clean

Air Act, as amended, the Comprehensive  Environmental,  Response,  Compensation,
and Liability Act of 1980  ("CERCLA"),  as amended,  the Federal Water Pollution
                             ------
Control  Act, as amended,  the  Occupational  Safety and Health Act of 1970,  as
amended,  the  Resource  Conservation  and  Recovery  Act of 1976  ("RCRA"),  as
                                                                     ----
amended,  the Safe Drinking Water Act, as amended,  the Toxic Substances Control

                                       6



Act, as amended,  the Superfund  Amendments and  Reauthorization Act of 1986, as
amended,  the  Hazardous  Materials  Transportation  Act, as amended,  and other
environmental  conservation or protection  Governmental  Requirements.  The term
"oil" shall have the meaning  specified in OPA, the terms "hazardous  substance"
                                                           --------------------
and "release" (or "threatened  release") have the meanings  specified in CERCLA,
     -------       -------------------
the terms  "solid  waste"  and  "disposal"  (or  "disposed")  have the  meanings
            ------------         --------         --------
specified  in RCRA  and the term  "oil and gas  waste"  shall  have the  meaning
                                   ------------------
specified  in Section  91.1011 of the Texas  Natural  Resources  Code  ("Section
                                                                         -------
91.1011");  provided, however, that (a) in the event either OPA, CERCLA, RCRA or
- -------
Section  91.1011 is amended so as to  broaden  the  meaning of any term  defined
thereby,  such broader  meaning shall apply  subsequent to the effective date of
such amendment and (b) to the extent the laws of the state or other jurisdiction
in which any Property of the Borrower or any  Subsidiary is located  establish a
meaning for "oil," "hazardous  substance,"  "release," "solid waste," "disposal"
             ---    --------------------     -------    -----------    --------
or "oil and gas  waste"  which is broader  than that  specified  in either  OPA,
    ------------------
CERCLA, RCRA or Section 91.1011, such broader meaning shall apply.

     "Equity  Interests" means shares of capital stock,  partnership  interests,
      -----------------
joint venture interest or interests in comparable entities, membership interests
in a limited liability company,  beneficial interests in a trust or other equity
ownership  interests  in a Person,  and any  warrants,  options or other  rights
entitling the holder thereof to purchase or acquire any such Equity Interest.

     "ERISA"  means the Employee  Retirement  Income  Security  Act of 1974,  as
      -----
amended, and any successor statute.

     "ERISA   Affiliate"   means  each  trade  or   business   (whether  or  not
      -----------------
incorporated)  which together with the Borrower or a Subsidiary  would be deemed
to be a "single  employer" within the meaning of section  4001(b)(1) of ERISA or
subsections (b), (c), (m) or (o) of section 414 of the Code.

     "ERISA Event" means (a) a "Reportable  Event"  described in section 4043 of
      -----------
ERISA and the regulations issued thereunder, (b) the withdrawal of the Borrower,
a Subsidiary or any ERISA  Affiliate  from a Plan during a plan year in which it
was a "substantial  employer" as defined in section 4001(a)(2) of ERISA, (c) the
filing  of a notice of intent to  terminate  a Plan or the  treatment  of a Plan
amendment as a termination  under section 4041 of ERISA,  (d) the institution of
proceedings  to terminate a Plan by the PBGC or (e) any other event or condition
which might  constitute  grounds under section 4042 of ERISA for the termination
of, or the appointment of a trustee to administer, any Plan.

     "Eurodollar",  when used in reference to any Loan or  Borrowing,  refers to
      ----------
whether such Loan, or the Loans comprising such Borrowing,  are bearing interest
at a rate determined by reference to the Adjusted LIBO Rate.

     "Event of Default" has the meaning assigned such term in Section 10.01.
      ----------------

     "Excepted  Liens"  means:  (a)  Liens  for  Taxes,   assessments  or  other
      ---------------
governmental  charges  or  levies  which are not  delinquent  or which are being
contested in good faith by appropriate  action and for which  adequate  reserves

                                       7



have been  maintained in  accordance  with GAAP;  (b) Liens in  connection  with
workers' compensation,  unemployment insurance or other social security, old age
pension or public  liability  obligations  which are not delinquent or which are
being  contested  in good faith by  appropriate  action  and for which  adequate
reserves have been maintained in accordance with GAAP; (c) statutory  landlord's
liens, operators', vendors', carriers', warehousemen's, repairmen's, mechanics',
suppliers', workers', materialmen's, construction or other like Liens arising by
operation  of law  in  the  ordinary  course  of  business  or  incident  to the
exploration,  development,  operation and  maintenance of Oil and Gas Properties
each of which is in respect of obligations  that are not delinquent or which are
being  contested  in good faith by  appropriate  action  and for which  adequate
reserves have been  maintained in accordance  with GAAP; (d)  contractual  Liens
which arise in the ordinary course of business under operating agreements, joint
venture  agreements,  oil and gas  partnership  agreements,  oil and gas leases,
farm-out agreements,  division orders, contracts for the sale, transportation or
exchange of oil and  natural  gas,  unitization  and  pooling  declarations  and
agreements,  area of mutual interest agreements,  overriding royalty agreements,
marketing agreements, processing agreements, net profits agreements, development
agreements,   gas  balancing  or  deferred  production  agreements,   injection,
repressuring and recycling agreements,  salt water or other disposal agreements,
seismic or other geophysical  permits or agreements,  and other agreements which
are usual and customary in the oil and gas business and are for claims which are
not delinquent or which are being contested in good faith by appropriate  action
and for which adequate  reserves have been  maintained in accordance  with GAAP,
provided  that any such Lien  referred  to in this  clause  does not  materially
impair the use of the  Property  covered by such Lien for the purposes for which
such Property is held by the Borrower or any Subsidiary or materially impair the
value of such Property  subject  thereto;  (e) Liens arising solely by virtue of
any  statutory or common law  provision  relating to banker's  liens,  rights of
set-off or similar  rights and remedies and burdening  only deposit  accounts or
other funds maintained with a creditor depository institution,  provided that no
such deposit  account is a dedicated  cash  collateral  account or is subject to
restrictions  against  access by the  depositor  in excess of those set forth by
regulations  promulgated by the Board and no such deposit account is intended by
Borrower or any of its  Subsidiaries  to provide  collateral  to the  depository
institution;  (f)  easements,  restrictions,  servitudes,  permits,  conditions,
covenants,  exceptions  or  reservations  in any Property of the Borrower or any
Subsidiary   for  the   purpose  of  roads,   pipelines,   transmission   lines,
transportation  lines,  distribution  lines for the removal of gas, oil, coal or
other minerals or timber,  and other like  purposes,  or for the joint or common
use of real  estate,  rights  of way,  facilities  and  equipment,  which in the
aggregate do not materially  impair the use of such Property for the purposes of
which such  Property is held by the  Borrower or any  Subsidiary  or  materially
impair  the  value  of such  Property  subject  thereto;  (g)  Liens  on cash or
securities  pledged to secure  performance of tenders,  surety and appeal bonds,
government  contracts,  performance  and  return  of money  bonds,  bids,  trade
contracts,  leases,  statutory  obligations,  regulatory  obligations  and other
obligations of a like nature  incurred in the ordinary  course of business;  (h)
Liens on existing and future cash, U.S.  government  securities,  and letters of
credit  securing or supporting  Swap  Agreements  permitted  pursuant to Section
9.19;  and (i)  judgment  and  attachment  Liens not giving  rise to an Event of
Default,  provided that any appropriate  legal  proceedings  which may have been
duly  initiated  for the  review of such  judgment  shall not have been  finally
terminated or the period within which such proceeding may be initiated shall not
have  expired and no action to enforce such Lien has been  commenced;  provided,
further that Liens  described in clauses (a) through (e) shall remain  "Excepted
Liens" only for so long as no action to enforce such Lien has been commenced and

                                       8



no  intention to  subordinate  the first  priority  Lien granted in favor of the
Administrative Agent and the Lenders is to be hereby implied or expressed by the
permitted existence of such Excepted Liens.

     "Excluded  Taxes"  means,  with respect to the  Administrative  Agent,  any
      ---------------
Lender,  the Issuing Bank or any other recipient of any payment to be made by or
on account of any obligation of the Borrower or any Guarantor hereunder or under
any other Loan Document,  (a) income or franchise  taxes imposed on (or measured
by) its net  income by the United  States of America or such other  jurisdiction
under the laws of which such  recipient is  organized or in which its  principal
office is located or, in the case of any Lender, in which its applicable lending
office is located,  (b) any branch profits taxes imposed by the United States of
America  or any  similar  tax  imposed  by any other  jurisdiction  in which the
Borrower or any  Guarantor  is located and (c) in the case of a Foreign  Lender,
any withholding tax that is imposed on amounts payable to such Foreign Lender at
the time such Foreign  Lender becomes a party to this Agreement (or designates a
new lending  office) or is  attributable  to such  Foreign  Lender's  failure to
comply with Section  5.03(e),  except to the extent that such Foreign Lender (or
its assignor,  if any) was entitled, at the time of designation of a new lending
office (or  assignment),  to receive  additional  amounts  with  respect to such
withholding tax pursuant to Section 5.03(a) or Section 5.03(c).

     "Existing Credit Agreement" means that certain Credit Agreement dated as of
      -------------------------
January 27, 2002, among the Borrower,  Wachovia Bank, National  Association,  as
administrative  agent,  and the  lenders  party  thereto,  as the  same has been
heretofore amended and supplemented from time to time.

     "Federal Funds  Effective  Rate" means,  for any day, the weighted  average
      ------------------------------
(rounded  upwards,  if  necessary,  to the  next  1/100  of 1%) of the  rates on
overnight Federal funds  transactions with members of the Federal Reserve System
arranged by Federal funds brokers,  as published on the next succeeding Business
Day by the  Federal  Reserve  Bank  of New  York,  or,  if  such  rate is not so
published for any day that is a Business Day, the average (rounded  upwards,  if
necessary,  to the  next  1/100 of 1%) of the  quotations  for such day for such
transactions  received  by the  Administrative  Agent from three  Federal  funds
brokers of recognized standing selected by it.

     "Financial Officer" means the chief financial officer, principal accounting
      -----------------
officer, treasurer or controller of the Borrower.

     "Financial  Statements" means the financial  statement or statements of the
      ---------------------
Borrower and its Consolidated Subsidiaries referred to in Section 7.04(a).

     "5.75%  Senior   Convertible   Notes"  means  those  certain  5.75%  Senior
      -----------------------------------
Convertible  Notes due 2022, in the aggregate  amount of $100,000,000  issued by
the Borrower March 20, 2002.

     "Foreign  Lender"  means any Lender that is  organized  under the laws of a
      ---------------
jurisdiction  other than that in which the Borrower is located.  For purposes of
this  definition,  the United  States of  America,  each State  thereof  and the
District of Columbia shall be deemed to constitute a single jurisdiction.

                                       9



     "GAAP" means generally accepted accounting  principles in the United States
      ----
of America as in effect  from time to time  subject to the terms and  conditions
set forth in Section 1.05.

     "Governmental  Authority"  means the  government  of the  United  States of
      -----------------------
America, any other nation or any political subdivision thereof, whether state or
local,  and any agency,  authority,  instrumentality,  regulatory  body,  court,
central  bank or  other  entity  exercising  executive,  legislative,  judicial,
taxing,  regulatory  or  administrative  powers or functions of or pertaining to
government over the Borrower, any Material Subsidiary,  any of their Properties,
any Agent, the Issuing Bank or any Lender.

     "Governmental Requirement" means any law, statute, code, ordinance,  order,
      ------------------------
determination,   rule,  regulation,  judgment,  decree,  injunction,  franchise,
permit, certificate,  license,  authorization or other directive or requirement,
whether  now  or  hereinafter   in  effect,   including,   without   limitation,
Environmental  Laws,  energy  regulations  and  occupational,  safety and health
standards or controls, of any Governmental Authority.

     "Guarantors"  means the Material  Subsidiaries,  and each other  Subsidiary
      ----------
that guarantees the Indebtedness pursuant to Section 8.14(b).

     "Guaranty  Agreement"  means an  agreement  executed by the  Guarantors  in
      -------------------
substantially  the form of Exhibit D-2, as the same may be amended,  modified or
supplemented from time to time.

     "Highest  Lawful  Rate" means,  with  respect to each  Lender,  the maximum
      ---------------------
nonusurious  interest rate, if any, that at any time or from time to time may be
contracted  for, taken,  reserved,  charged or received on the Notes or on other
Indebtedness  under laws of the State of Texas which are presently in effect or,
to the extent allowed by law, under such  applicable laws which may hereafter be
in effect  and  which  allow a higher  maximum  nonusurious  interest  rate than
applicable laws allow as of the date hereof.

     "Hydrocarbon Interests" means all rights, titles, interests and estates now
      ---------------------
or hereafter acquired in and to oil and gas leases, oil, gas and mineral leases,
or other liquid or gaseous hydrocarbon leases, mineral fee interests, overriding
royalty and royalty  interests,  net profit  interests  and  production  payment
interests, including any reserved or residual interests of whatever nature.

     "Hydrocarbons"  means oil,  gas,  casinghead  gas, drip  gasoline,  natural
      ------------
gasoline, condensate,  distillate, liquid hydrocarbons, gaseous hydrocarbons and
all products refined or separated therefrom.

     "Indebtedness"  means  any and all  amounts  owing  or to be  owing  by the
      ------------
Borrower or any Guarantor:  (a) to the Administrative Agent, the Issuing Bank or
any Lender  under any Loan  Document;  (b) to any Lender or any  Affiliate  of a
Lender  under any present or future Swap  Agreements  entered  into  between the
Borrower  or any  Guarantor  and  any  Lender  or  any  Affiliate  of a  Lender,
including, without limitation, the Swap Agreements entered into with a Lender or
an  Affiliate  of a Lender and listed on  attached  Schedule  7.21,  and (c) all
renewals, extensions and/or rearrangements of any of the above.

                                       10



     "Indemnified Taxes" means Taxes other than Excluded Taxes.
      -----------------

     "Information  Memorandum"  means the  Confidential  Information  Memorandum
      -----------------------
dated February, 2005, relating to the Borrower and the Transactions.

     "Initial  Reserve  Report"  means  (a) the  report of the  Borrower,  which
      ------------------------
includes  reserve  estimates  as  prepared  by Ryder  Scott  Company,  L.P.  and
Netherland,  Sewell Associates,  Inc., dated as of January 1, 2005, with respect
to the value of the Oil and Gas  Properties  of the  Borrower  and its  Material
Subsidiaries  as of  December  31,  2004,  and (b) the report of the  Manager of
Reservoir  Engineering  of the  Borrower  dated as of December  31,  2004,  with
respect  to the  value of the Oil and Gas  Properties  of the  Borrower  and its
Material Subsidiaries as of December 31, 2004.

     "Interest  Election  Request" means a request by the Borrower to convert or
      ---------------------------
continue a Borrowing in accordance with Section 2.04.

     "Interest  Payment  Date" means (a) with respect to any ABR Loan,  the last
      -----------------------
day of each calendar month and (b) with respect to any Eurodollar Loan, the last
day of the Interest  Period  applicable to the Borrowing of which such Loan is a
part and, in the case of a Eurodollar  Borrowing with an Interest Period of more
than three  months'  duration,  each day prior to the last day of such  Interest
Period that occurs at intervals of three months' duration after the first day of
such Interest Period.

     "Interest  Period"  means with  respect to any  Eurodollar  Borrowing,  the
      ----------------
period  commencing on the date of such  Borrowing and ending on the  numerically
corresponding  day in the calendar  month that is one, two,  three or six months
thereafter, as the Borrower may elect; provided, that (a) if any Interest Period
would end on a day other than a Business  Day,  such  Interest  Period  shall be
extended  to the next  succeeding  Business  Day  unless  such  next  succeeding
Business Day would fall in the next calendar  month, in which case such Interest
Period shall end on the next preceding  Business Day and (b) any Interest Period
pertaining to a Eurodollar  Borrowing that commences on the last Business Day of
a calendar  month (or on a day for which there is no  numerically  corresponding
day in the last calendar  month of such  Interest  Period) shall end on the last
Business Day of the last calendar  month of such Interest  Period.  For purposes
hereof,  the date of a  Borrowing  initially  shall  be the  date on which  such
Borrowing is made and thereafter  shall be the effective date of the most recent
conversion or continuation of such Borrowing.

     "Interim  Redetermination"  has the meaning  assigned  such term in Section
      ------------------------
2.07(b).

     "Interim  Redetermination  Date" means the date on which a  Borrowing  Base
      ------------------------------
that  has been  redetermined  pursuant  to an  Interim  Redetermination  becomes
effective as provided in Section 2.07(d).

     "Investment" means, for any Person: (a) the acquisition  (whether for cash,
      ----------
Property,  services or securities or otherwise) of Equity Interests of any other
Person  or any  agreement  to make  any  such  acquisition  (including,  without
limitation,  any "short sale" or any sale of any  securities at a time when such
securities are not owned by the Person  entering into such short sale);  (b) the
making of any deposit  with, or advance,  loan or other  extension of credit to,

                                       11



any other Person (including the purchase of Property from another Person subject
to an  understanding  or  agreement,  contingent  or  otherwise,  to resell such
Property to such Person,  but excluding  any such advance,  loan or extension of
credit having a term not exceeding  ninety (90) days  representing  the purchase
price of  inventory or supplies  sold by such Person in the  ordinary  course of
business)  or (c) the  entering  into of any  guarantee  (excluding  performance
guarantees)  of, or other  contingent  obligation  (including the deposit of any
Equity  Interests  to be sold) with  respect to, Debt or other  liability of any
other Person and (without duplication) any amount committed to be advanced, lent
or extended to such Person.

     "Issuing Bank" means Wachovia,  in its capacity as the issuer of Letters of
      ------------
Credit  hereunder,  and its  successors  in such capacity as provided in Section
2.08(j).  The  Issuing  Bank may,  in its  discretion,  arrange  for one or more
Letters of Credit to be issued by  Affiliates of the Issuing Bank, in which case
the term "Issuing Bank" shall include any such Affiliate with respect to Letters
          ------------
of Credit issued by such Affiliate.

     "LC Commitment" at any time means $50,000,000.
      -------------

     "LC  Disbursement"  means a payment made by the Issuing Bank  pursuant to a
      ----------------
Letter of Credit.

     "LC Exposure"  means,  at any time,  the sum of (a) the  aggregate  undrawn
      -----------
amount of all outstanding  Letters of Credit at such time plus (b) the aggregate
amount of all LC Disbursements that have not yet been reimbursed by or on behalf
of the Borrower at such time. The LC Exposure of any Lender at any time shall be
its Applicable Percentage of the total LC Exposure at such time.

     "Lenders"  means the Persons  listed on Annex I, any Person that shall have
      -------
become a party hereto pursuant to an Assignment and  Assumption,  other than any
such Person  that ceases to be a party  hereto  pursuant  to an  Assignment  and
Assumption,  and any Person  that shall have become a party  hereto  pursuant to
Section 2.06(c).

     "Letter  of  Credit"  means any letter of credit  issued  pursuant  to this
      ------------------
Agreement,  and the  outstanding  letters of credit  issued  under the  Existing
Credit Agreement, more particularly described on attached Annex II.

     "Letter of Credit  Agreements" means all letter of credit  applications and
      ----------------------------
other  agreements  (including  any  amendments,   modifications  or  supplements
thereto)  submitted by the Borrower,  or entered into by the Borrower,  with the
Issuing Bank relating to any Letter of Credit.

     "LIBO  Rate"  means,  with  respect  to any  Eurodollar  Borrowing  for any
      ----------
Interest Period, the rate appearing on Page 3750 of the Dow Jones Market Service
(or on any successor or substitute page of such Service,  or any successor to or
substitute  for such  Service,  providing  rate  quotations  comparable to those
currently  provided  on  such  page  of  such  Service,  as  determined  by  the
Administrative  Agent from time to time for purposes of providing  quotations of
interest rates applicable to dollar deposits in the London interbank  market) at
approximately   11:00  a.m.,  London  time,  two  Business  Days  prior  to  the
commencement  of such Interest  Period,  as the rate for dollar  deposits with a
maturity  comparable to such Interest Period. In the event that such rate is not
available at such time for any reason, then the "LIBO Rate" with respect to such
                                                 ---------

                                       12



Eurodollar  Borrowing for such Interest Period shall be the rate at which dollar
deposits of $5,000,000 and for a maturity comparable to such Interest Period are
offered  by  the  principal  London  office  of  the  Administrative   Agent  in
immediately  available  funds in the London  interbank  market at  approximately
11:00 a.m.,  London time,  two Business Days prior to the  commencement  of such
Interest Period.

     "Lien" means any interest in Property  securing an obligation owed to, or a
      ----
claim by, a Person other than the owner of the  Property,  whether such interest
is based on the common law, statute or contract,  and whether such obligation or
claim is fixed or  contingent,  and including but not limited to (a) the lien or
security  interest  arising  from  a  mortgage,  encumbrance,  pledge,  security
agreement, conditional sale or trust receipt or a lease, consignment or bailment
for security purposes or (b) production payments and the like payable out of Oil
and Gas  Properties.  The term "Lien"  shall  include  easements,  restrictions,
                                ----
servitudes, permits, conditions,  covenants, exceptions or reservations. For the
purposes of this Agreement, the Borrower and its Subsidiaries shall be deemed to
be the  owner of any  Property  which it has  acquired  or  holds  subject  to a
conditional  sale  agreement,  or  leases  under  a  financing  lease  or  other
arrangement  pursuant to which  title to the  Property  has been  retained by or
vested in some other Person in a transaction intended to create a financing.

     "Loan  Documents"  means this  Agreement,  the Notes,  the Letter of Credit
      ---------------
Agreements, the Letters of Credit and the Security Instruments.

     "Loans"  means the loans made by the  Lenders to the  Borrower  pursuant to
      -----
this Agreement.

     "Majority  Lenders"  means,  at any time while no Loans or LC  Exposure  is
      -----------------
outstanding,  Lenders having at least sixty-six and two-thirds percent (66-2/3%)
of the Aggregate Commitments;  and at any time while any Loans or LC Exposure is
outstanding, Lenders holding at least sixty-six and two-thirds percent (66-2/3%)
of the  outstanding  aggregate  principal  amount of the Loans or  participation
interests  in  Letters  of Credit  (without  regard to any sale by a Lender of a
participation in any Loan under Section 12.04(c)).

     "Material  Adverse  Effect"  means a  material  adverse  effect  on (a) the
      -------------------------
business, assets, operations, prospects or condition, financial or otherwise, of
the  Borrower  and the  Subsidiaries  taken as a whole,  (b) the  ability of the
Borrower,  any  Subsidiary  or any  Guarantor to perform any of its  obligations
under any Loan Document or (c) the rights and remedies of or benefits  available
to the  Administrative  Agent,  the  Issuing  Bank or any Lender  under any Loan
Document.

     "Material  Agreements" means each agreement (whether one or more) described
      --------------------
or referred to on Schedule 7.24.

     "Material  Indebtedness"  means Debt  (other  than the Loans and Letters of
      ----------------------
Credit), or obligations in respect of one or more Swap Agreements, of any one or
more of the  Borrower and its  Subsidiaries  in an  aggregate  principal  amount
exceeding $15,000,000.  For purposes of determining Material  Indebtedness,  the
"principal  amount" of the  obligations  of the  Borrower or any  Subsidiary  in
respect of any Swap Agreement at any time shall be the maximum  aggregate amount

                                       13



(giving effect to any netting  agreements)  that the Borrower or such Subsidiary
would be required to pay if such Swap Agreement were terminated at such time.

     "Material   Subsidiary"   means  a  Subsidiary  of  Borrower  that  owns  a
      ---------------------
Substantial Portion of the Property of Borrower and its Subsidiaries.

     "Maturity Date" means April 7, 2010.
      -------------

     "Maximum  Credit Amount" means at any time an amount equal to the lesser of
      ----------------------
(a) the then effective Borrowing Base and (b) $500,000,000.

     "Moody's" means Moody's Investors  Service,  Inc. and any successor thereto
      -------
that is a nationally recognized rating agency.

     "Mortgaged  Property"  means  any  Property  owned by the  Borrower  or any
      -------------------
Material  Subsidiary  which is subject to the Liens  existing and to exist under
the terms of the Security Instruments.

     "Multiemployer  Plan" means a Plan which is a multiemployer plan as defined
      -------------------
in section 3(37) or 4001 (a)(3) of ERISA.

     "New Borrowing  Base Notice" has the meaning  assigned such term in Section
      --------------------------
2.07(d).

     "Notes"  means the  promissory  notes of the Borrower  described in Section
      -----
2.02(d)  and being  substantially  in the form of Exhibit A,  together  with all
amendments, modifications, replacements, extensions and rearrangements thereof.

     "Oil  and  Gas  Properties"  means  (a)  Hydrocarbon  Interests;   (b)  the
      -------------------------
Properties now or hereafter pooled or unitized with Hydrocarbon  Interests;  (c)
all  presently   existing  or  future   unitization,   pooling   agreements  and
declarations  of pooled units and the units created thereby  (including  without
limitation  all  units  created  under  orders,  regulations  and  rules  of any
Governmental  Authority)  which may affect all or any portion of the Hydrocarbon
Interests;  (d)  all  operating  agreements,  contracts  and  other  agreements,
including  production  sharing contracts and agreements,  which relate to any of
the  Hydrocarbon  Interests  or the  production,  sale,  purchase,  exchange  or
processing of Hydrocarbons  from or attributable to such Hydrocarbon  Interests;
(e) all  Hydrocarbons  in and  under  and  which  may be  produced  and saved or
attributable to the Hydrocarbon  Interests,  including all oil in tanks, and all
rents, issues, profits, proceeds,  products,  revenues and other incomes from or
attributable to the  Hydrocarbon  Interests;  (f) all tenements,  hereditaments,
appurtenances and Properties in any manner appertaining,  belonging,  affixed or
incidental to the Hydrocarbon Interests and (g) all Properties,  rights, titles,
interests  and estates  described  or referred to above,  including  any and all
Property, real or personal, now owned or hereinafter acquired and situated upon,
used,  held for use or useful  in  connection  with the  operating,  working  or
development of any of such Hydrocarbon Interests or Property (excluding drilling
rigs,  automotive  equipment,  rental equipment or other personal Property which
may be on such  premises for the purpose of drilling a well or for other similar
temporary uses) and including any and all oil wells, gas wells,  injection wells
or other  wells,  buildings,  structures,  fuel  separators,  liquid  extraction
plants, plant compressors,  pumps, pumping units, field gathering systems, tanks
and tank batteries,  fixtures,  valves, fittings,  machinery and parts, engines,

                                       14



boilers, meters, apparatus,  equipment,  appliances, tools, implements,  cables,
wires, towers, casing, tubing and rods, surface leases, rights-of-way, easements
and  servitudes  together  with  all  additions,  substitutions,   replacements,
accessions and attachments to any and all of the foregoing.

     "Other  Taxes"  means any and all  present or future  stamp or  documentary
      ------------
taxes or any other excise or Property  taxes,  charges or similar levies arising
from any payment made hereunder or from the  execution,  delivery or enforcement
of, or otherwise with respect to, this Agreement and any other Loan Document.

     "Participant" has the meaning set forth in Section 12.04(c)(i).
      -----------

     "PBGC" means the Pension  Benefit  Guaranty  Corporation,  or any successor
      ----
thereto.

     "Permitted  Refinancing  Debt" means Debt (for purposes of this definition,
      ----------------------------
"new  Debt")  incurred  in  exchange  for,  or  proceeds  of  which  are used to
 ---------
refinance, all of any other Debt (the "Refinanced Debt"); provided that (a) such
                                       ---------------
new Debt is in an aggregate principal amount not in excess of the sum of (i) the
aggregate  principal  amount then outstanding of the Refinanced Debt (or, if the
Refinanced  Debt is exchanged or acquired for an amount less than the  principal
amount thereof to be due and payable upon a declaration of acceleration thereof,
such lesser  amount) and (ii) an amount  necessary to pay any fees and expenses,
including premiums,  related to such exchange or refinancing;  (b) such new Debt
has a stated maturity no earlier than the stated maturity of the Refinanced Debt
and an average life no shorter than the average life of the Refinanced Debt; (c)
such new Debt  does not have a stated  interest  rate in  excess  of the  stated
interest  rate of the  Refinanced  Debt;  (d) such new Debt does not contain any
covenants which are more onerous to the Borrower and its Subsidiaries than those
imposed  by the  Refinanced  Debt  and (e) such  new  Debt  (and any  guarantees
thereof)  is  subordinated  in right of  payment  to the  Indebtedness  (or,  if
applicable,  the  Guaranty  Agreement)  to at  least  the  same  extent  as  the
Refinanced Debt and is otherwise subordinated on terms substantially  reasonably
satisfactory to the Administrative Agent.

     "Person" means any natural person, corporation,  limited liability company,
      ------
trust, joint venture, association, company, partnership,  Governmental Authority
or other entity.

     "Plan" means any employee  pension benefit plan, as defined in section 3(2)
      ----
of  ERISA,  which  (a)  is  currently  or  hereafter  sponsored,  maintained  or
contributed to by the Borrower, a Subsidiary or an ERISA Affiliate or (b) was at
any time during the six calendar  years  preceding  the date hereof,  sponsored,
maintained  or  contributed  to by the  Borrower  or a  Subsidiary  or an  ERISA
Affiliate.

     "Pledge - Borrower"  means that certain Pledge and Security  Agreement from
      -----------------
the   Borrower  in  favor  of  the   Administrative   Agent,   pledging  to  the
Administrative  Agent as security for the Indebtedness all equity interests held
by the  Borrower  in  the  Material  Subsidiaries  (other  than  NPC  Inc.),  in
substantially  the form of Exhibit D-3, as the same may be amended,  modified or
supplemented from time to time.

     "Pledge - Nance"  means  that  certain  Amended  and  Restated  Pledge  and
      --------------
Security   Agreement   from  Nance   Petroleum   Corporation  in  favor  of  the

                                       15



Administrative  Agent,  pledging to the Administrative Agent as security for the
Indebtedness  all equity  interests held by Nance  Petroleum  Corporation in NPC
Inc.,  in  substantially  the form of Exhibit  D-4,  as the same may be amended,
modified or supplemented from time to time.

     "Prime Rate" means the rate of interest per annum  publicly  announced from
      ----------
time to time by Wachovia as its prime rate in effect at its principal  office in
Charlotte, North Carolina; each change in the Prime Rate shall be effective from
and  including  the date such change is publicly  announced as being  effective.
Such rate is set by Wachovia as a general  reference  rate of  interest,  taking
into account such factors as Wachovia may deem appropriate;  it being understood
that many of Wachovia's commercial or other loans are priced in relation to such
rate, that it is not necessarily the lowest or best rate actually charged to any
customer and that  Wachovia may make various  commercial or other loans at rates
of interest having no relationship to such rate.

     "Property"  means any  interest in any kind of  property or asset,  whether
      --------
real,  personal  or  mixed,  or  tangible  or  intangible,   including,  without
limitation, cash, securities, accounts and contract rights.

     "Proposed  Borrowing Base" has the meaning assigned to such term in Section
      ------------------------
2.07(c)(i).

     "Proposed  Borrowing Base Notice" has the meaning  assigned to such term in
      -------------------------------
Section 2.07(c)(ii).

     "Redemption"  means the repurchase,  redemption,  prepayment,  repayment or
      ----------
defeasance (or the segregation of funds with respect to any of the foregoing) of
the Material  Indebtedness;  provided,  however,  the term Redemption  shall not
                             --------   -------
include early termination of a Swap Agreement due to an ISDA "Termination Event"
to the extent the amount due at termination  exceeds  $15,000,000.  "Redeem" has
                                                                     ------
the correlative meaning thereto.

     "Redetermination Date" means, with respect to any Scheduled Redetermination
      --------------------
or any Interim  Redetermination,  the date that the redetermined  Borrowing Base
related thereto becomes effective pursuant to Section 2.07(d).

     "Refinanced  Debt" has the meaning  assigned such term in the definition of
      ----------------
"Permitted Refinancing Debt".

     "Register" has the meaning assigned such term in Section 12.04(b)(iv).
      --------

     "Regulation D" means Regulation D of the Board, as the same may be amended,
      ------------
supplemented or replaced from time to time.

     "Related  Parties"  means,  with  respect  to any  specified  Person,  such
      ----------------
Person's Affiliates and the respective directors,  officers,  employees,  agents
and advisors of such Person and such Person's Affiliates.

     "Remedial Work" has the meaning assigned such term in Section 8.10(a).
      -------------

     "Reserve  Report"  means  a  report,  in  form  and  substance   reasonably
      ---------------
satisfactory  to the  Administrative  Agent,  setting forth, as of each December
31st  or  June  30th  (or  such   other   date  in  the  event  of  an   Interim
Redetermination)  the  oil  and  gas  reserves  attributable  to the Oil and Gas

                                       16



Properties  of the  Borrower  and the  Material  Subsidiaries,  together  with a
projection of the rate of  production  and future net income,  taxes,  operating
expenses and capital  expenditures  with respect thereto as of such date,  based
upon the pricing assumptions  consistent with SEC reporting  requirements at the
time.

     "Responsible Officer" means, as to any Person, the Chief Executive Officer,
      -------------------
the  President,  any  Financial  Officer or any Vice  President  of such Person.
Unless otherwise specified, all references to a Responsible Officer herein shall
mean a Responsible Officer of the Borrower.

     "Restricted  Payment" means any dividend or other distribution  (whether in
      -------------------
cash,  securities or other Property) with respect to any Equity Interests in the
Borrower,  or any  payment  (whether  in cash,  securities  or other  Property),
including  any  sinking  fund or similar  deposit,  on account of the  purchase,
redemption,  retirement,  acquisition,  cancellation  or termination of any such
Equity  Interests  in the  Borrower  or any  option,  warrant or other  right to
acquire any such Equity Interests in the Borrower.

     "Revolving  Credit Exposure" means, with respect to any Lender at any time,
      --------------------------
the sum of the  outstanding  principal  amount of such Lender's Loans and its LC
Exposure at such time.

     "Scheduled  Redetermination"  has the meaning assigned such term in Section
      --------------------------
2.07(b).

     "Scheduled  Redetermination  Date" means the date on which a Borrowing Base
      --------------------------------
that has been  redetermined  pursuant  to a  Scheduled  Redetermination  becomes
effective as provided in Section 2.07(d).

     "SEC"  means  the  Securities  and  Exchange  Commission  or any  successor
      ---
Governmental Authority.

     "Security  Instruments"  means the  Guaranty  Agreement,  the  Pledge,  all
      ---------------------
assignments,  mortgages, deeds of trust, amendments and supplements to mortgages
and  deeds of trust,  and all  other  agreements,  instruments  or  certificates
described  or  referred  to in Exhibit  D-1,  and any and all other  agreements,
instruments  or  certificates  now or hereafter  executed  and  delivered by the
Borrower or any other Person (other than Swap Agreements with the Lenders or any
Affiliate of a Lender or participation or similar  agreements between any Lender
and any other lender or creditor  with respect to any  Indebtedness  pursuant to
this  Agreement)  in  connection  with,  or  as  security  for  the  payment  or
performance of the  Indebtedness,  the Notes,  this Agreement,  or reimbursement
obligations  under the  Letters of Credit,  as such  agreements  may be amended,
modified, supplemented or restated from time to time.

     "S&P"  means  Standard  &  Poor's  Ratings Group, a division of The
      -------
McGraw-Hill  Companies,  Inc.,  and any  successor  thereto that is a nationally
recognized rating agency.

     "Statutory  Reserve Rate" means a fraction  (expressed  as a decimal),  the
      -----------------------
numerator of which is the number one and the  denominator of which is the number
one minus the  aggregate  of the  maximum  reserve  percentages  (including  any
marginal,  special,  emergency or supplemental  reserves) expressed as a decimal
established  by the Board to which the  Administrative  Agent is  subject,  with

                                       17



respect to the Adjusted LIBO Rate, for eurocurrency  funding (currently referred
to as  "Eurocurrency  Liabilities"  in Regulation D of the Board).  Such reserve
percentages   shall  include  those  imposed  pursuant  to  such  Regulation  D.
Eurodollar  Loans shall be deemed to constitute  eurocurrency  funding and to be
subject to such reserve requirements without benefit of or credit for proration,
exemptions  or  offsets  that may be  available  from time to time to any Lender
under such Regulation D or any comparable regulation. The Statutory Reserve Rate
shall be adjusted automatically on and as of the effective date of any change in
any reserve percentage.

     "Subsidiary"  means:  (a) any  Person of which at least a  majority  of the
      ----------
outstanding  Equity  Interests having by the terms thereof ordinary voting power
to elect a majority of the board of directors,  manager or other  governing body
of such Person  (irrespective  of whether or not at the time Equity Interests of
any other class or classes of such Person  shall have or might have voting power
by  reason of the  happening  of any  contingency)  is at the time  directly  or
indirectly  owned  or  controlled  by  the  Borrower  or  one  or  more  of  its
Subsidiaries  and  (b) any  partnership  of  which  the  Borrower  or any of its
Subsidiaries is a general  partner.  Unless  otherwise  indicated  herein,  each
reference to the term "Subsidiary" shall mean a Subsidiary of the Borrower.
                       ----------

     "Substantial  Portion" means,  with respect to the Property of the Borrower
      --------------------
and  its   Subsidiaries,   Property  which  represents  more  than  10%  of  the
consolidated  assets of the Borrower and its  Subsidiaries  or property which is
responsible  for  more  than  10%  of  the  consolidated  net  sales  or of  the
consolidated net income of the Borrower and its  Subsidiaries,  in each case, as
would be shown in the consolidated  financial statements of the Borrower and its
Subsidiaries at the beginning of the  twelve-month  period ending with the month
in which such  determination  is made (or if financial  statements have not been
delivered  hereunder for that month which begins the twelve-month  period,  then
the financial  statements delivered hereunder for the quarter ending immediately
prior to that month).

     "Swap  Agreement"  means any agreement  with respect to any swap,  forward,
      ---------------
future  or  derivative  transaction  or  option or  similar  agreement,  whether
exchange  traded,  "over-the-counter"  or  otherwise,  involving,  or settled by
reference  to,  one or  more  rates,  currencies,  commodities,  equity  or debt
instruments or securities, or economic, financial or pricing indices or measures
of economic,  financial or pricing risk or value or any similar  transaction  or
any combination of these transactions; provided that no phantom stock or similar
plan  providing for payments only on account of services  provided by current or
former  directors,  officers,  employees or  consultants  of the Borrower or the
Subsidiaries shall be a Swap Agreement.

     "Synthetic  Leases" means, in respect of any Person, all leases which shall
      -----------------
have been, or should have been, in  accordance  with GAAP,  treated as operating
leases on the financial statements of the Person liable (whether contingently or
otherwise) for the payment of rent thereunder and which were properly treated as
indebtedness  for borrowed money for purposes of U.S.  federal income taxes,  if
the lessee in respect  thereof is obligated to either  purchase for an amount in
excess  of, or pay upon  early  termination  an amount in excess  of, 80% of the
residual value of the Property  subject to such operating  lease upon expiration
or early termination of such lease.

                                       18



     "Taxes" means any and all present or future taxes, levies, imposts, duties,
      -----
deductions, charges or withholdings imposed by any Governmental Authority.

     "Termination  Date" means the earlier of the Maturity  Date and the date of
      -----------------
termination of the Commitments.

     "Total  Debt"  means,  at any  date,  all  Debt  of the  Borrower  and  the
      -----------
Consolidated  Subsidiaries  on a consolidated  basis,  exclusive of all accounts
payable, accrued expenses,  liabilities or other obligations to pay the deferred
purchase price of Property or services to the extent any of same was included in
Debt of the Borrower and the Consolidated Subsidiaries on a consolidated basis.

     "Transactions"  means,  with respect to (a) the  Borrower,  the  execution,
      ------------
delivery and performance by the Borrower of this Agreement,  and each other Loan
Document to which it is a party, the borrowing of Loans, the use of the proceeds
thereof and the issuance of Letters of Credit hereunder,  and the grant of Liens
by the Borrower on Mortgaged  Properties  and other  Properties  pursuant to the
Security Instruments and (b) each Material Subsidiary,  the execution,  delivery
and performance by such Material Subsidiary of each Loan Document to which it is
a party, the guaranteeing of the  Indebtedness and the other  obligations  under
the  Guaranty   Agreement  by  such  Material   Subsidiary   and  such  Material
Subsidiary's  grant  of the  security  interests  and  provision  of  collateral
thereunder,  and the grant of Liens by such  Material  Subsidiary  on  Mortgaged
Properties and other Properties pursuant to the Security Instruments.

     "Type", when used in reference to any Loan or Borrowing,  refers to whether
      ----
the rate of interest on such Loan, or on the Loans comprising such Borrowing, is
determined by reference to the Alternate Base Rate or the Adjusted LIBO Rate.

     "Wholly-Owned  Subsidiary"  means  any  Subsidiary  of  which  all  of  the
      ------------------------
outstanding  Equity  Interests  (other  than any  directors'  qualifying  shares
mandated by applicable law), on a fully-diluted basis, are owned by the Borrower
or one or more of the Wholly-Owned Subsidiaries.

     Section 1.03 Types of Loans and Borrowings. For purposes of this Agreement,
                  -----------------------------
Loans and  Borrowings,  respectively,  may be classified and referred to by Type
(e.g., a "Eurodollar Loan" or a "Eurodollar Borrowing").
          ---------------        --------------------

     Section 1.04 Terms  Generally.  The definitions of terms herein shall apply
                  ----------------
equally to the  singular  and plural  forms of the terms  defined.  Whenever the
context may require,  any pronoun  shall  include the  corresponding  masculine,
feminine and neuter forms. The words "include", "includes" and "including" shall
be deemed to be followed  by the phrase  "without  limitation".  The word "will"
shall be  construed  to have the same  meaning  and effect as the word  "shall".
Unless the context requires  otherwise (a) any definition of or reference to any
agreement,  instrument or other document  herein shall be construed as referring
to such  agreement,  instrument or other  document as from time to time amended,
supplemented  or  otherwise  modified  (subject  to  any  restrictions  on  such
amendments,  supplements or modifications  set forth herein),  (b) any reference
herein to any Person shall be construed to include such Person's  successors and
assigns (subject to the restrictions  contained herein), (c) the words "herein",

                                       19



"hereof" and  "hereunder",  and words of similar  import,  shall be construed to
refer to this  Agreement  in its entirety  and not to any  particular  provision
hereof and (d) all references herein to Articles,  Sections,  Annexes,  Exhibits
and  Schedules  shall be  construed  to refer to Articles  and  Sections of, and
Annexes, Exhibits and Schedules to, this Agreement.

     Section 1.05 Accounting Terms and  Determinations;  GAAP.  Unless otherwise
                  -------------------------------------------
specified  herein,  all accounting  terms used herein shall be interpreted,  all
determinations  with respect to accounting  matters hereunder shall be made, and
all financial  statements and certificates  and reports as to financial  matters
required to be furnished to the  Administrative  Agent or the Lenders  hereunder
shall be prepared,  in accordance with GAAP,  applied on a basis consistent with
the  Financial  Statements  except for changes in which  Borrower's  independent
certified public  accountants  concur and which are disclosed to  Administrative
Agent  on the  next  date on  which  financial  statements  are  required  to be
delivered to the Lenders pursuant to Section 8.01(a);  provided that, unless the
Borrower and the Majority Banks shall otherwise agree in writing, no such change
shall  modify  or  affect  the  manner in which  compliance  with the  covenants
contained herein is computed such that all such computations  shall be conducted
utilizing financial information presented consistently with prior periods.

                                   ARTICLE II
                                   The Credits

     Section 2.01 Commitments.  Subject  to the terms and  conditions  set forth
                  -----------
herein, each Lender agrees to make Loans to the Borrower during the Availability
Period  in an  aggregate  principal  amount  that  will not  result  in (a) such
Lender's Revolving Credit Exposure exceeding such Lender's Commitment or (b) the
Aggregate Revolving Credit Exposures exceeding the Aggregate Commitments then in
effect.  Within the foregoing limits and subject to the terms and conditions set
forth herein, the Borrower may borrow, repay and reborrow the Loans.

     Section 2.02 Loans and Borrowings.
                  --------------------

              (a) Borrowings;  Several  Obligations.  Each Loan shall be made as
                  ---------------------------------
part  of a  Borrowing  consisting  of  Loans  made  by the  Lenders  ratably  in
accordance with their respective Commitments.  The failure of any Lender to make
any Loan  required to be made by it shall not  relieve  any other  Lender of its
obligations  hereunder;  provided that the Commitments are several and no Lender
shall be responsible for any other Lender's failure to make Loans as required.

              (b) Types of Loans.  Subject to Section 3.03, each Borrowing shall
                  --------------
be  comprised  entirely of ABR Loans or  Eurodollar  Loans as the  Borrower  may
request  in  accordance  herewith.  Each  Lender  at its  option  may  make  any
Eurodollar  Loan by causing any domestic or foreign  branch or Affiliate of such
Lender to make such Loan;  provided  that any  exercise of such option shall not
affect the obligation of the Borrower to repay such Loan in accordance  with the
terms of this Agreement.

              (c) Minimum  Amounts;  Limitation on Number of Borrowings.  At the
                  -----------------------------------------------------
commencement  of  each  Interest  Period  for  any  Eurodollar  Borrowing,  such
Borrowing  shall be in an  aggregate  amount  that is an  integral  multiple  of
$1,000,000 and not less than $3,000,000.  At the time that each ABR Borrowing is
made,  such  Borrowing  shall  be in an  aggregate  amount  that is an  integral

                                       20



multiple  of  $500,000  and  not  less  than  $1,000,000;  provided  that an ABR
Borrowing  may be in an  aggregate  amount  that is equal to the  entire  unused
balance  of  the  total   Commitments   or  that  is  required  to  finance  the
reimbursement  of  an  LC  Disbursement  as  contemplated  by  Section  2.08(f).
Borrowings of more than one Type may be outstanding  at the same time;  provided
that  there  shall  not at any time be more  than a total of six (6)  Eurodollar
Borrowings  outstanding.  Notwithstanding any other provision of this Agreement,
the  Borrower  shall not be  entitled  to  request,  or to elect to  convert  or
continue,  any Borrowing if the Interest  Period  requested with respect thereto
would end after the Maturity Date.

              (d) Notes.  The Loans made by each Lender  shall be evidenced by a
                  -----
single  promissory note of the Borrower in substantially  the form of Exhibit A,
dated,  in the  case of (i)  any  Lender  party  hereto  as of the  date of this
Agreement,  as of the date of this  Agreement,  (ii) any Lender  that  becomes a
party hereto pursuant to an Assignment and Assumption,  as of the effective date
of the  assignment  and  assumption,  or (iii) any Lender  that  becomes a party
hereto in connection  with an increase in the Aggregate  Commitment  pursuant to
Section 2.06(c), as of the effective date of such increase, payable to the order
of such Lender in a principal  amount  equal to its  Commitment  as in effect on
such  date,  and  otherwise  duly  completed.  In the  event  that any  Lender's
Commitment  increases or decreases for any reason  (whether  pursuant to Section
2.06, Section 12.04(b) or otherwise),  the Borrower shall deliver or cause to be
delivered on the effective date of such increase or decrease, a new Note payable
to the order of such Lender in a principal  amount equal to its Commitment after
giving effect to such increase or decrease,  and otherwise duly  completed.  The
date, amount,  Type,  interest rate and, if applicable,  Interest Period of each
Loan made by each  Lender,  and all  payments  made on account of the  principal
thereof,  shall be recorded by such Lender on its books for its Note, and, prior
to any transfer,  may be endorsed by such Lender on a schedule  attached to such
Note or any  continuation  thereof or on any separate record  maintained by such
Lender.  Failure to make any such  notation  or to attach a  schedule  shall not
affect any Lender's or the  Borrower's  rights or obligations in respect of such
Loans or affect the validity of such transfer by any Lender of its Note.

     Section 2.03 Requests for  Borrowings To request a Borrowing,  the Borrower
                  ------------------------
shall notify the  Administrative  Agent of such request by telephone  (a) in the
case of a  Eurodollar  Borrowing,  not later  than 1:00 p.m.,  Charlotte,  North
Carolina time, three Business Days before the date of the proposed  Borrowing or
(b) in the case of a ABR Borrowing,  not later than 1:00 p.m., Charlotte,  North
Carolina  time,  one  Business  Day before the date of the  proposed  Borrowing;
provided that any such notice of an ABR  Borrowing to finance the  reimbursement
of an LC  Disbursement as contemplated by Section 2.08(f) may be given not later
than 11:00 a.m.,  Charlotte,  North  Carolina  time, on the date of the proposed
Borrowing. Each such telephonic Borrowing Request shall be irrevocable and shall
be confirmed promptly by hand delivery or telecopy to the  Administrative  Agent
of a written  Borrowing Request in a form approved by the  Administrative  Agent
and signed by the Borrower.  Each such telephonic and written  Borrowing Request
shall specify the following information in compliance with Section 2.02:

                  (i) the aggregate amount of the requested Borrowing;

                  (ii) the date of such Borrowing, which shall be a Business Day
in the United States;

                                       21



                  (iii)  whether such  Borrowing is to be an ABR  Borrowing or a
Eurodollar Borrowing;

                  (iv)  in the  case  of a  Eurodollar  Borrowing,  the  initial
Interest Period to be applicable  thereto,  which shall be a period contemplated
by the definition of the term "Interest Period";

                  (v) the  amount  of the then  effective  Borrowing  Base,  the
current  Aggregate  Revolving Credit Exposures  (without regard to the requested
Borrowing) and the pro forma Aggregate Revolving Credit Exposures (giving effect
to the requested Borrowing); and

                  (vi) the  location  and  number of the  Borrower's  account to
which funds are to be  disbursed,  which shall comply with the  requirements  of
Section 2.05.

If no election as to the Type of  Borrowing  is  specified,  then the  requested
Borrowing  shall be an ABR  Borrowing.  If no Interest  Period is specified with
respect to any requested Eurodollar Borrowing, then the Borrower shall be deemed
to have  selected an Interest  Period of one month's  duration.  Each  Borrowing
Request  shall  constitute  a  representation  that the amount of the  requested
Borrowing shall not cause the Aggregate Revolving Credit Exposures to exceed the
Aggregate Commitments then in effect.

Promptly  following  receipt  of a  Borrowing  Request in  accordance  with this
Section 2.03, the  Administrative  Agent shall advise each Lender of the details
thereof  and of the  amount  of  such  Lender's  Loan  to be made as part of the
requested Borrowing.

     Section 2.04 Interest Elections.
                  ------------------

              (a) Conversion and Continuance.  Each Borrowing initially shall be
                  --------------------------
of the Type specified in the applicable  Borrowing Request and, in the case of a
Eurodollar Borrowing, shall have an initial Interest Period as specified in such
Borrowing Request.  Thereafter, the Borrower may elect to convert such Borrowing
to a  different  Type  or to  continue  such  Borrowing  and,  in the  case of a
Eurodollar  Borrowing,  may elect Interest Periods therefor,  all as provided in
this Section  2.04.  The Borrower  may elect  different  options with respect to
different  portions of the affected  Borrowing,  in which case each such portion
shall be allocated  ratably among the Lenders holding the Loans  comprising such
Borrowing,  and the Loans  comprising  each such portion  shall be  considered a
separate Borrowing.

              (b) Interest  Election  Requests.  To make an election pursuant to
                  ----------------------------
this Section 2.04,  the Borrower shall notify the  Administrative  Agent of such
election by  telephone  by the time that a Borrowing  Request  would be required
under  Section  2.03 if the  Borrower  were  requesting  a Borrowing of the Type
resulting  from such election to be made on the effective date of such election.
Each such telephonic Interest Election Request shall be irrevocable and shall be
confirmed promptly by hand delivery or telecopy to the Administrative Agent of a
written Interest Election Request in a form approved by the Administrative Agent
and signed by the Borrower.

                                       22



              (c) Information in Interest Election Requests. Each telephonic and
                  -----------------------------------------
written  Interest  Election  Request shall specify the following  information in
compliance with Section 2.02:

                  (i) the  Borrowing  to which such  Interest  Election  Request
applies  and, if different  options are being  elected with respect to different
portions  thereof,  the  portions  thereof  to be  allocated  to each  resulting
Borrowing  (in which case the  information  to be specified  pursuant to Section
2.04(c)(iii) and (iv) shall be specified for each resulting Borrowing);

                  (ii) the effective  date of the election made pursuant to such
Interest Election Request, which shall be a Business Day;

                  (iii)  whether  the  resulting  Borrowing  is  to  be  an  ABR
Borrowing or a Eurodollar Borrowing; and

                  (iv) if the resulting Borrowing is a Eurodollar Borrowing, the
Interest  Period to be applicable  thereto after giving effect to such election,
which shall be a period  contemplated  by the  definition of the term  "Interest
Period".

(d) If any such Interest  Election Request  requests a Eurodollar  Borrowing but
does not specify an Interest  Period,  then the Borrower shall be deemed to have
selected an Interest Period of one month's duration.

              (e) Notice  to  Lenders  by  the  Administrative  Agent.  Promptly
                  ---------------------------------------------------
following  receipt of an Interest  Election Request,  the  Administrative  Agent
shall advise each Lender of the details thereof and of such Lender's  portion of
each resulting Borrowing.

              (f) Effect of Failure to Deliver Timely Interest  Election Request
                  --------------------------------------------------------------
and Events of Default on Interest  Election.  If the Borrower fails to deliver a
- -------------------------------------------
timely Interest Election Request with respect to a Eurodollar Borrowing prior to
the end of the Interest Period applicable  thereto,  then, unless such Borrowing
is repaid as provided herein,  at the end of such Interest Period such Borrowing
shall be converted to an ABR Borrowing.  Notwithstanding  any contrary provision
hereof,  if an  Event  of  Default  has  occurred  and  is  continuing:  (i)  no
outstanding Borrowing may be converted to or continued as a Eurodollar Borrowing
and (ii) unless repaid,  each Eurodollar  Borrowing shall be converted to an ABR
Borrowing at the end of the Interest Period applicable thereto.

                                       23



     Section 2.05 Funding of Borrowings.
                  ---------------------

              (a) Funding by Lenders.  Each  Lender  shall  make each Loan to be
                  ------------------
made  by it  hereunder  on  the  proposed  date  thereof  by  wire  transfer  of
immediately available funds by 2:00 p.m. Charlotte,  North Carolina time, to the
account of the  Administrative  Agent most  recently  designated  by it for such
purpose by notice to the Lenders.  The Administrative Agent will make such Loans
available to the Borrower by promptly crediting the amounts so received, in like
funds, to an account of the Borrower maintained with the Administrative Agent in
Charlotte,  North  Carolina and  designated  by the  Borrower in the  applicable
Borrowing Request;  provided that ABR Loans made to finance the reimbursement of
an LC  Disbursement  as  provided  in Section  2.08(f)  shall be remitted by the
Administrative Agent to the Issuing Bank.

              (b) Presumption   of   Funding   by   the   Lenders.   Unless  the
                  -----------------------------------------------
Administrative  Agent shall have received  written notice from a Lender prior to
the proposed date of any Borrowing  that such Lender will not make  available to
the   Administrative   Agent  such  Lender's  share  of  such   Borrowing,   the
Administrative  Agent may assume that such Lender has made such share  available
on such date in accordance  with Section  2.05(a) and may, in reliance upon such
assumption,  make  available to the  Borrower a  corresponding  amount.  In such
event,  if a Lender has not in fact made its share of the  applicable  Borrowing
available  to the  Administrative  Agent,  then the  applicable  Lender  and the
Borrower severally agree to pay to the Administrative  Agent forthwith on demand
such corresponding amount with interest thereon, for each day from and including
the date such amount is made available to the Borrower to but excluding the date
of payment to the  Administrative  Agent, at (i) in the case of such Lender, the
greater  of the  Federal  Funds  Effective  Rate  and a rate  determined  by the
Administrative  Agent in  accordance  with banking  industry  rules on interbank
compensation  or (ii) in the case of the Borrower,  the interest rate applicable
to ABR  Loans;  provided,  however,  such  demands  shall be made first upon the
                --------   -------
applicable Lender and then upon the Borrower. If such Lender pays such amount to
the  Administrative  Agent, then such amount shall constitute such Lender's Loan
included in such Borrowing.

     Section 2.06 Termination, Reduction and Increase of Aggregate Commitment.
                  -----------------------------------------------------------

              (a) Scheduled  Termination  of   Commitments.   Unless  previously
                  ----------------------------------------
terminated, the Commitments shall terminate on the Maturity Date. If at any time
the Maximum  Credit  Amount or the  Borrowing  Base is  terminated or reduced to
zero,  then  the  Commitments  shall  terminate  on the  effective  date of such
termination or reduction.

              (b) Optional Termination and Reduction of Aggregate Commitment.
                  ----------------------------------------------------------

                  (i) The  Borrower may at any time  terminate,  or from time to
time reduce,  the Aggregate  Commitment;  provided that A. each reduction of the
Aggregate  Commitment  shall be in an amount  that is an  integral  multiple  of
$1,000,000 and not less than  $5,000,000 and B. the Borrower shall not terminate
or reduce the Aggregate  Commitment  if, after giving  effect to any  concurrent
prepayment  of the Loans in  accordance  with  Section  3.04(c),  the  Aggregate
Revolving Credit Exposures would exceed the Aggregate Commitments.

                                       24



                  (ii) The Borrower shall notify the Administrative Agent of any
election  to  terminate  or  reduce  the  Aggregate   Commitment  under  Section
2.06(b)(i)  at least three  Business  Days prior to the  effective  date of such
termination  or  reduction,  specifying  such  election and the  effective  date
thereof.  Promptly  following receipt of any notice,  the  Administrative  Agent
shall advise the Lenders of the contents  thereof.  Each notice delivered by the
Borrower  pursuant  to  this  Section  2.06(b)(ii)  shall  be  irrevocable.  Any
termination or reduction of the Aggregate  Commitment shall be permanent and may
not be reinstated  except  pursuant to Section  2.06(c).  Each  reduction of the
Aggregate  Commitment shall be made ratably among the Lenders in accordance with
each Lender's Applicable Percentage.

              (c) Optional Increase in Aggregate Commitment.
                  -----------------------------------------

                  (i)   Subject   to  the   conditions   set  forth  in  Section
2.06(c)(ii),  the Borrower may increase the Aggregate  Commitment then in effect
by increasing  the  Commitment of a Lender or by causing a Person  acceptable to
the  Administrative  Agent  that at such time is not a Lender to become a Lender
(an "Additional Lender").
     -----------------

                  (ii) Any increase in the Aggregate Commitment shall be subject
to the following additional conditions:

                      A. such increase shall not be less than $10,000,000 unless
the Administrative Agent otherwise consents;

                      B. no Default shall have occurred and be continuing at the
effective date of such increase;

                      C. on the effective date of such  increase,  no Eurodollar
Borrowings   shall  be  outstanding   (or  if  any  Eurodollar   Borrowings  are
outstanding,  then the effective  date of such increase shall be the last day of
the Interest Period in respect of such Eurodollar Borrowings);

                      D. each  Lender shall have had the option to increase  its
Commitment by its Applicable Percentage of the amount of such increase; provided
                                                                        --------
that,  no  Lender's  Commitment  may be  increased  without  the consent of such
- ----
Lender;

                      E. if  the  Borrower  elects  to  increase  the  Aggregate
Commitment  by  increasing  the  Commitment  of a Lender,  the Borrower and such
Lender  shall  execute and  deliver to the  Administrative  Agent a  certificate
substantially in the form of Exhibit F-1 (a "Commitment Increase  Certificate"),
                                             --------------------------------
and  further,  in the event a new Note is  required  to  reflect  the  increased
Commitment of such Lender,  then in that case,  the Borrower shall deliver a new
Note  (after  presentation  of same to  Borrower  by the  Administrative  Agent)
payable  to the  order  of  such  Lender  in a  principal  amount  equal  to its
Commitment  after giving effect to such increase,  and otherwise duly completed,
together with a processing and recordation fee of $3,500 payable by the Borrower
to the  Administrative  Agent  and  the  reimbursement  by the  Borrower  of the
reasonable legal fees of counsel to the Administrative Agent;

                      F.  If  the  Borrower  elects  to increase  the  Aggregate
Commitment by causing an Additional  Lender to become a party to this Agreement,
then the Borrower and such  Additional  Lender shall  execute and deliver to the

                                       25



Administrative Agent a certificate  substantially in the form of Exhibit F-2 (an
"Additional Lender Certificate"),  together with an Administrative Questionnaire
 -----------------------------
and a processing and recordation fee of $3,500 payable by such Additional Lender
and the reimbursement by the Borrower of the reasonable legal fees of counsel to
the  Administrative  Agent,  and  the  Borrower  shall  deliver  a  Note  (after
presentation  of same to Borrower by the  Administrative  Agent)  payable to the
order of such Additional  Lender in a principal  amount equal to its Commitment,
and otherwise duly completed.

                  (iii) Subject to acceptance and recording  thereof pursuant to
Section  2.06(c)(iv),  from  and  after  the  effective  date  specified  in the
Commitment Increase  Certificate or the Additional Lender Certificate (or if any
Eurodollar Borrowings are outstanding,  then the last day of the Interest Period
in  respect  of such  Eurodollar  Borrowings):  A. the  amount of the  Aggregate
Commitment  shall be  increased as set forth  therein,  and B. in the case of an
Additional  Lender  Certificate,  any Additional Lender party thereto shall be a
party to this  Agreement  and the other Loan  Documents  and have the rights and
obligations  of a Lender under this Agreement and the other Loan  Documents.  In
addition,  the Lender or the Additional Lender, as applicable,  shall purchase a
pro rata  portion of the  Aggregate  Revolving  Credit  Exposures of each of the
other  Lenders  (and  such  Lenders  hereby  agree  to sell and to take all such
further  action to effectuate  such sale) such that each Lender  (including  any
Additional  Lender, if applicable)  shall hold its Applicable  Percentage of the
Aggregate  Revolving Credit Exposures after giving effect to the increase in the
Aggregate Commitment;

                  (iv) Upon its receipt of a duly completed  Commitment Increase
Certificate or an Additional  Lender  Certificate,  executed by the Borrower and
the  Lender  or the  Borrower  and  the  Additional  Lender  party  thereto,  as
applicable, the processing and recording fee referred to in Section 2.06(c)(ii),
the  Administrative   Questionnaire  referred  to  in  Section  2.06(c)(ii),  if
applicable, and the written consent of the Administrative Agent to such increase
required by Section  2.06(c)(i),  the  Administrative  Agent  shall  accept such
Commitment Increase  Certificate or Additional Lender Certificate and record the
information  contained  therein in the Register required to be maintained by the
Administrative  Agent  pursuant  to Section  12.04(b)(iv).  No  increase  in the
Aggregate Commitment shall be effective for purposes of this Agreement unless it
has been recorded in the Register as provided in this Section 2.06(c)(iv); and

                      (G) after giving effect to an  increase  in the  Aggregate
Commitment, the Aggregate Commitment shall not exceed the Maximum Credit Amount.

     Section 2.07 Borrowing Base.
                  --------------

              (a) Initial  Borrowing Base. For the period from and including the
                  -----------------------
Effective  Date to but excluding the first  Redetermination  Date, the amount of
the Borrowing Base shall be  $400,000,000.  Notwithstanding  the foregoing,  the
Borrowing  Base  shall be  subject  to  further  adjustments  from  time to time
pursuant to this Section 2.07 and Section 8.13(c), Section 9.12(a), Section 9.13
and Section 9.21.

              (b) Scheduled  and Interim  Redeterminations.  Subject  to Section
                  ----------------------------------------
2.07(d),    the   Borrowing   Base   shall   be   redetermined   (a   "Scheduled
                                                                       ---------
Redetermination")  no later than April 1 and October 1 of each year,  commencing
- ---------------
October 1, 2005. In addition,  the Borrower may, by notifying the Administrative

                                       26



Agent  thereof,  and the  Administrative  Agent  may,  at the  direction  of the
Majority  Lenders,  by  notifying  the  Borrower  thereof,  one time  during any
12-month  period,  elect to cause the Borrowing Base to be redetermined  between
Scheduled  Redeterminations  (an "Interim  Redetermination")  in accordance with
                                  ------------------------
this Section 2.07.

              (c) Scheduled and Interim Redetermination Procedure.
                  -----------------------------------------------

                  (i)  Each   Scheduled   Redetermination   and   each   Interim
Redetermination   shall  be  effectuated   as  follows:   Upon  receipt  by  the
Administrative Agent of A. the Reserve Report and the certificate required to be
delivered  by the  Borrower  to the  Administrative  Agent,  in  the  case  of a
Scheduled Redetermination, pursuant to Section 8.12(a) and (c), and, in the case
of an Interim Redetermination,  pursuant to Section 8.12(b) and (c), and B. such
other reports, data and supplemental information, including, without limitation,
the information provided pursuant to Section 8.12(c), as may, from time to time,
be  reasonably  requested by the Majority  Lenders  (the  Reserve  Report,  such
certificate and such other reports, data and supplemental  information being the
"Engineering Reports"),  the Administrative Agent shall evaluate the information
 -------------------
contained in the  Engineering  Reports and shall,  in good faith,  propose a new
Borrowing Base (the "Proposed  Borrowing  Base") based upon such information and
                     -------------------------
such  other  information  (including,  without  limitation,  the status of title
information  with  respect to the Oil and Gas  Properties  as  described  in the
Engineering  Reports and the existence of any other Debt) as the  Administrative
Agent  deems  appropriate  and  consistent  with its normal oil and gas  lending
criteria as it exists at the particular time.

                  (ii) The  Administrative  Agent shall  notify the Borrower and
the  Lenders  of the  Proposed  Borrowing  Base (the  "Proposed  Borrowing  Base
                                                       -------------------------
Notice"):
- ------

                      A. in the  case  of a Scheduled Redetermination  1. if the
Administrative  Agent shall have received the Engineering Reports required to be
delivered  by the Borrower  pursuant to Section  8.12(a) and (c) in a timely and
complete  manner,  then on or before March 15th and September  15th of such year
following the date of delivery or 2. if the Administrative  Agent shall not have
received  the  Engineering  Reports  required to be  delivered  by the  Borrower
pursuant  to Section  8.12(a)  and (c) in a timely  and  complete  manner,  then
promptly  after the  Administrative  Agent  has  received  complete  Engineering
Reports from the Borrower and has had a reasonable  opportunity to determine the
Proposed Borrowing Base in accordance with Section 2.07(c)(i); and

                      B. in  the case of an  Interim  Redetermination, promptly,
and in any  event,  within fifteen (15) days after the Administrative  Agent has
received the required Engineering Reports.

                  (iii) Any  Proposed  Borrowing  Base that would  increase  the
Borrowing  Base then in effect must be approved or deemed to have been  approved
by all of the Lenders as provided in this Section 2.07(c)(iii); and any Proposed
Borrowing Base that would decrease or maintain the Borrowing Base then in effect
must be approved or be deemed to have been  approved by the Majority  Lenders as
provided in this Section  2.07(c)(iii).  Upon receipt of the Proposed  Borrowing
Base Notice, each Lender shall have fifteen (15) days to agree with the Proposed

                                       27



Borrowing  Base or disagree  with the  Proposed  Borrowing  Base by proposing an
alternate  Borrowing  Base. If at the end of such fifteen (15) days,  any Lender
has  not   communicated   its  approval  or   disapproval   in  writing  to  the
Administrative  Agent,  such  silence  shall be deemed to be an  approval of the
Proposed  Borrowing  Base.  If,  at the end of such  15-day  period,  all of the
Lenders,  in the case of a  Proposed  Borrowing  Base that  would  increase  the
Borrowing  Base  then in  effect,  or the  Majority  Lenders,  in the  case of a
Proposed  Borrowing Base that would decrease or maintain the Borrowing Base then
in effect,  have approved or deemed to have  approved,  as  aforesaid,  then the
Proposed  Borrowing Base shall become the new Borrowing  Base,  effective on the
date  specified  in Section  2.07(d).  If,  however,  at the end of such  15-day
period,  all of the Lenders or the Majority  Lenders,  as  applicable,  have not
approved or deemed to have  approved,  as  aforesaid,  then for purposes of this
Section 2.07, the  Administrative  Agent shall poll the Lenders to ascertain the
highest  Borrowing Base then  acceptable (aa) to the Majority  Lenders,  if such
amount would decrease the Borrowing  Base then in effect,  or (bb) to all of the
Lenders, if such amount would increase the Borrowing Base then in effect,  which
amount shall become the new Borrowing  Base,  effective on the date specified in
Section 2.07(d).

                  (iv) If any Lender  refuses  to  approve a Proposed  Borrowing
Base  pursuant to Section  2.07(c)(iii),  the  Borrower  shall have the right to
cause the  Commitment  of such  dissenting  Lender to be  replaced  pursuant  to
Section 5.06.

              (d) Effectiveness  of a   Redetermined  Borrowing  Base.  After  a
                  ---------------------------------------------------
redetermined  Borrowing  Base is approved or is deemed to have been  approved by
all of the  Lenders or  Majority  Lenders,  as  applicable,  pursuant to Section
2.07(c)(iii), the Administrative Agent shall notify the Borrower and the Lenders
of the  amount of the  redetermined  Borrowing  Base (the  "New  Borrowing  Base
                                                            --------------------
Notice"),  and such amount shall become the new  Borrowing  Base,  effective and
- ------
applicable to the Borrower, the Agents, the Issuing Bank and the Lenders:

                      A. in the  case of a Scheduled  Redetermination, 1. if the
Administrative  Agent shall have received the Engineering Reports required to be
delivered  by the Borrower  pursuant to Section  8.12(a) and (c) in a timely and
complete  manner,  then no  later  than  April 1 or  October  1, as  applicable,
following such notice, or 2. if the Administrative Agent shall not have received
the  Engineering  Reports  required to be delivered by the Borrower  pursuant to
Section  8.12(a) and (c) in a timely and complete  manner,  then on the Business
Day next succeeding delivery of such notice; and

                      B.  in  the  case of an  Interim  Redetermination, on  the
Business Day next succeeding delivery of such notice.

                      C. Such amount shall then become the Borrowing  Base until
the next Scheduled  Redetermination Date, the next Interim  Redetermination Date
or the next  adjustment to the Borrowing  Base under  Section  8.13(c),  Section
9.12(a) or Section 9.13, whichever occurs first.  Notwithstanding the foregoing,
no Scheduled  Redetermination or Interim  Redetermination shall become effective
until the New Borrowing Base Notice related thereto is received by the Borrower.

                                       28



     Section 2.08 Letters of Credit.
                  -----------------

              (a) General. Subject to the terms and conditions set forth herein,
                  -------
the  Borrower  may request the issuance of Letters of Credit for its own account
or for the account of any of its  Material  Subsidiaries,  in a form  reasonably
acceptable  to the  Administrative  Agent and the Issuing  Bank, at any time and
from  time  to  time  during  the  Availability  Period.  In  the  event  of any
inconsistency  between the terms and  conditions of this Agreement and the terms
and conditions of any form of letter of credit  application  or other  agreement
submitted by the Borrower to, or entered into by the Borrower  with, the Issuing
Bank  relating  to any  Letter  of  Credit,  the terms  and  conditions  of this
Agreement shall control.

              (b) Notice of Issuance,  Amendment,  Renewal,  Extension;  Certain
                  --------------------------------------------------------------
Conditions.  To request the  issuance  of a Letter of Credit (or the  amendment,
- ----------
renewal or extension of an  outstanding  Letter of Credit),  the Borrower  shall
hand  deliver  or  telecopy  (or  transmit  by  electronic   communication,   if
arrangements for doing so have been approved by the Issuing Bank) to the Issuing
Bank and the  Administrative  Agent  (not less than three (3)  Business  Days in
advance of the requested  date of issuance,  amendment,  renewal or extension) a
notice:

                  (i)   requesting  the  issuance  of  a  Letter  of  Credit  or
identifying the Letter of Credit to be amended, renewed or extended;

                  (ii)  specifying the date of issuance,  amendment,  renewal or
extension (which shall be a Business Day);

                  (iii) specifying the date on which such Letter of Credit is to
expire (which shall comply with Section 2.08(d));

                  (iv) specifying the amount of such Letter of Credit;

                  (v) specifying the name and address of the beneficiary thereof
and such other  information  as shall be necessary to prepare,  amend,  renew or
extend such Letter of Credit; and

                  (vi)  specifying  the amount of the then  effective  Borrowing
Base, the current  Aggregate  Revolving Credit Exposures  (without regard to the
requested Letter of Credit or the requested  amendment,  renewal or extension of
an outstanding  Letter of Credit) and the pro forma Aggregate  Revolving  Credit
Exposures  (giving  effect to the  requested  Letter of Credit or the  requested
amendment, renewal or extension of an outstanding Letter of Credit).

Each notice shall  constitute a  representation  that after giving effect to the
requested issuance,  amendment,  renewal or extension, as applicable, (i) the LC
Exposure  shall not exceed the LC Commitment  and (ii) the  Aggregate  Revolving
Credit Exposures shall not exceed the Aggregate Commitments.

                                       29



              (c) If requested  by the Issuing  Bank,  the  Borrower  also shall
submit a letter of credit  application  on the Issuing  Bank's  standard form in
connection with any request for a Letter of Credit.

              (d) Expiration  Date.  Each  Letter of Credit  shall  expire at or
                  ----------------
prior to the close of business on the earlier of (i) the date one year after the
date of the issuance of such Letter of Credit (or, in the case of any renewal or
extension  thereof,  one year after such renewal or extension) and (ii) the date
that is five Business Days prior to the Maturity Date.

              (e) Participations.  By  the issuance of a Letter of Credit (or an
                  --------------
amendment to a Letter of Credit  increasing the amount  thereof) and without any
further action on the part of the Issuing Bank or the Lenders,  the Issuing Bank
hereby grants to each Lender,  and each Lender hereby  acquires from the Issuing
Bank, a participation in such Letter of Credit equal to such Lender's Applicable
Percentage  of the aggregate  amount  available to be drawn under such Letter of
Credit. In consideration and in furtherance of the foregoing, each Lender hereby
absolutely and  unconditionally  agrees to pay to the Administrative  Agent, for
the account of the Issuing Bank, such Lender's Applicable  Percentage of each LC
Disbursement  made by the Issuing Bank and not reimbursed by the Borrower on the
date  due as  provided  in  Section  2.08(f),  or of any  reimbursement  payment
required to be refunded to the Borrower for any reason. Each Lender acknowledges
and agrees  that its  obligation  to  acquire  participations  pursuant  to this
Section  2.08(e) in respect of Letters of Credit is absolute  and  unconditional
and  shall  not  be  affected  by any  circumstance  whatsoever,  including  any
amendment,  renewal or extension of any Letter of Credit or the  occurrence  and
continuance  of a Default or reduction or termination  of the  Commitments,  and
that each such payment shall be made without any offset, abatement,  withholding
or reduction whatsoever.

              (f) Reimbursement.   If  the  Issuing   Bank  shall  make  any  LC
                  -------------
Disbursement in respect of a Letter of Credit, the Borrower shall reimburse such
LC Disbursement by paying to the Administrative Agent an amount equal to such LC
Disbursement not later than 12:00 noon,  Charlotte,  North Carolina time, on the
date that such LC  Disbursement  is made,  if the Borrower  shall have  received
notice of such LC Disbursement  prior to 12:00 noon,  Charlotte,  North Carolina
time,  on such date,  or, if such notice has not been  received by the  Borrower
prior to such time on such date, then not later than 12:00 noon Charlotte, North
Carolina  time, on (i) the Business Day that the Borrower  receives such notice,
if such notice is received prior to 12:00 noon, Charlotte,  North Carolina time,
on the day of receipt,  or (ii) the Business Day  immediately  following the day
that the Borrower  receives such notice, if such notice is not received prior to
such time on the day of receipt;  provided that if such LC  Disbursement  is not
less than  $1,000,000,  the Borrower may, subject to the conditions to Borrowing
set forth herein,  request in accordance  with Section 2.03 that such payment be
financed  with a ABR  Borrowing  in an  equivalent  amount and, to the extent so
financed, the Borrower's obligation to make such payment shall be discharged and
replaced by the resulting ABR  Borrowing.  If the Borrower  makes such a request
(and if the Borrower  fails to make such a request and has not made the relevant
reimbursement,   it  shall  be  deemed  to  have  made  such  a  request),   the
Administrative Agent shall notify each Lender of the applicable LC Disbursement,
the  payment  then due from the  Borrower in respect  thereof and such  Lender's
Applicable  Percentage thereof.  Promptly following receipt of such notice, each
Lender shall pay to the  Administrative  Agent its Applicable  Percentage of the
payment  then due from the  Borrower,  in the same manner as provided in Section
2.05 with  respect to Loans made by such Lender (and  Section  2.05 shall apply,
mutatis  mutandis,  to  the  payment  obligations  of  the  Lenders),   and  the
Administrative  Agent  shall  promptly  pay to the  Issuing  Bank the amounts so
received  by  it  from  the   Lenders.   Promptly   following   receipt  by  the
Administrative  Agent of any payment from the Borrower  pursuant to this Section

                                       30



2.08(f),  the Administrative  Agent shall distribute such payment to the Issuing
Bank or, to the extent that Lenders have made payments  pursuant to this Section
2.08(f) to reimburse the Issuing Bank, then to such Lenders and the Issuing Bank
as their interests may appear.

              (g) Obligations  Absolute.  The Borrower's obligation to reimburse
                  ---------------------
LC Disbursements as provided in Section 2.08(f) shall be absolute, unconditional
and irrevocable, and shall be performed strictly in accordance with the terms of
this Agreement under any and all  circumstances  whatsoever and  irrespective of
(i) any lack of validity or enforceability  of any Letter of Credit,  any Letter
of Credit Agreement or this Agreement,  or any term or provision  therein,  (ii)
any draft or other  document  presented  under a Letter of Credit  proving to be
forged,  fraudulent  or invalid in any respect or any  statement  therein  being
untrue or inaccurate  in any respect,  (iii) payment by the Issuing Bank under a
Letter of Credit against presentation of a draft or other document that does not
comply  with the  terms  of such  Letter  of  Credit  or any  Letter  of  Credit
Agreement,  or (iv) any other event or circumstance  whatsoever,  whether or not
similar to any of the  foregoing,  that might,  but for the  provisions  of this
Section  2.08(g),  constitute  a legal or equitable  discharge  of, or provide a
right of setoff  against,  the  Borrower's  obligations  hereunder.  Neither the
Administrative Agent, the Lenders nor the Issuing Bank, nor any of their Related
Parties shall have any liability or responsibility by reason of or in connection
with the  issuance or transfer of any Letter of Credit or any payment or failure
to  make  any  payment  thereunder  (irrespective  of any  of the  circumstances
referred to in the preceding sentence),  or any error,  omission,  interruption,
loss or  delay  in  transmission  or  delivery  of any  draft,  notice  or other
communication  under or relating to any Letter of Credit (including any document
required to make a drawing thereunder), any error in interpretation of technical
terms or any  consequence  arising from causes beyond the control of the Issuing
Bank;  provided that the foregoing  shall not be construed to excuse the Issuing
Bank from  liability  to the  Borrower  to the extent of any direct  damages (as
opposed to consequential  damages,  claims in respect of which are hereby waived
by the  Borrower to the extent  permitted  by  applicable  law)  suffered by the
Borrower  that are caused by the Issuing  Bank's  failure to exercise  care when
determining  whether  drafts  and other  documents  presented  under a Letter of
Credit comply with the terms thereof.  The parties hereto  expressly agree that,
in the  absence of gross  negligence  or willful  misconduct  on the part of the
Issuing Bank (as finally determined by a court of competent  jurisdiction),  the
Issuing Bank shall be deemed to have  exercised all requisite  care in each such
determination.  In  furtherance  of  the  foregoing  and  without  limiting  the
generality thereof,  the parties agree that, with respect to documents presented
which appear on their face to be in substantial  compliance  with the terms of a
Letter of Credit,  the Issuing Bank may, in its sole  discretion,  either accept
and  make  payment  upon  such  documents  without  responsibility  for  further
investigation,  regardless  of any notice or  information  to the  contrary,  or
refuse to accept and make payment upon such  documents if such documents are not
in strict compliance with the terms of such Letter of Credit.

              (h) Disbursement  Procedures.  The  Issuing  Bank shall,  promptly
                  ------------------------
following its receipt thereof,  examine all documents  purporting to represent a
demand for payment  under a Letter of Credit.  The Issuing  Bank shall  promptly
notify the  Administrative  Agent and the  Borrower by telephone  (confirmed  by
telecopy)  of such demand for  payment and whether the Issuing  Bank has made or
will make an LC  Disbursement  thereunder;  provided that any failure to give or
delay in giving such notice shall not relieve the Borrower of its  obligation to
reimburse  the  Issuing  Bank  and  the  Lenders  with  respect  to any  such LC
Disbursement.

                                       31



              (i) Interim  Interest.  If  the  Issuing  Bank  shall  make any LC
                  -----------------
Disbursement,  then,  until the Borrower shall have  reimbursed the Issuing Bank
for such LC Disbursement (either with its own funds or a Borrowing under Section
2.08(f)),  the unpaid amount thereof shall bear interest,  for each day from and
including the date such LC  Disbursement  is made to but excluding the date that
the  Borrower  reimburses  such LC  Disbursement,  at the  rate per  annum  then
applicable to ABR Loans. Interest accrued pursuant to this Section 2.08(i) shall
be for the account of the Issuing  Bank,  except  that  interest  accrued on and
after the date of payment by any Lender pursuant to Section 2.08(f) to reimburse
the  Issuing  Bank shall be for the account of such Lender to the extent of such
payment.

              (j) Replacement  of  the Issuing  Bank.  The  Issuing  Bank may be
                  ----------------------------------
replaced at any time by written agreement among the Borrower, the Administrative
Agent,  the  replaced   Issuing  Bank  and  the  successor   Issuing  Bank.  The
Administrative  Agent shall  notify the Lenders of any such  replacement  of the
Issuing  Bank.  At the time any such  replacement  shall become  effective,  the
Borrower  shall pay all unpaid  fees  accrued  for the  account of the  replaced
Issuing Bank pursuant to Section  3.05(b).  From and after the effective date of
any such  replacement,  (i) the successor Issuing Bank shall have all the rights
and obligations of the Issuing Bank under this Agreement with respect to Letters
of  Credit  to be  issued  thereafter  and (ii)  references  herein  to the term
"Issuing  Bank" shall be deemed to refer to such  successor  or to any  previous
Issuing  Bank,  or to such  successor  and all previous  Issuing  Banks,  as the
context shall require. After the replacement of the Issuing Bank hereunder,  the
replaced Issuing Bank shall remain a party hereto and shall continue to have all
the rights and obligations of the Issuing Bank under this Agreement with respect
to Letters of Credit  issued by it prior to such  replacement,  but shall not be
required to issue additional Letters of Credit.

              (k) Cash  Collateralization.  If (i) any  Event of  Default  shall
                  -----------------------
occur and be continuing and the Borrower receives notice from the Administrative
Agent or the Majority Lenders demanding the deposit of cash collateral  pursuant
to this  Section  2.08(k),  or  (ii)  the  Borrower  is  required  to pay to the
Administrative  Agent the excess  attributable  to an LC Exposure in  connection
with any  prepayment  pursuant  to  Section  3.04(c),  then the  Borrower  shall
deposit,  in an  account  with  the  Administrative  Agent,  in the  name of the
Administrative Agent and for the benefit of the Lenders, an amount in cash equal
to, in the case of an Event of Default,  the LC  Exposure,  and in the case of a
payment  required by Section  3.04(c),  the amount of such excess as provided in
Section 3.04(c),  as of such date plus any accrued and unpaid interest  thereon;
provided  that the  obligation  to deposit  such cash  collateral  shall  become
effective  immediately,  and  such  deposit  shall  become  immediately  due and
payable,  without demand or other notice of any kind, upon the occurrence of any
Event of  Default  with  respect  to the  Borrower  or any  Material  Subsidiary
described in Section 10.01(h) or Section 10.01(i). The Borrower hereby grants to
the  Administrative  Agent, for the benefit of the Issuing Bank and the Lenders,
an exclusive first priority and continuing  perfected  security  interest in and
Lien on such account and all cash, checks, drafts, certificates and instruments,
if any,  from time to time  deposited or held in such  account,  all deposits or
wire  transfers  made  thereto,  any and all  investments  purchased  with funds
deposited in such account, all interest, dividends, cash, instruments, financial
assets and other  Property from time to time  received,  receivable or otherwise
payable in respect of, or in exchange for, any or all of the foregoing,  and all
proceeds, products,  accessions,  rents, profits, income and benefits therefrom,
and any substitutions and replacements  therefor.  The Borrower's  obligation to
deposit  amounts  pursuant  to  this  Section  2.08(k)  shall  be  absolute  and

                                       32



unconditional,  without regard to whether any  beneficiary of any such Letter of
Credit  has  attempted  to draw down all or a portion of such  amount  under the
terms of a Letter of Credit,  and, to the fullest extent permitted by applicable
law,  shall not be subject to any  defense or be affected by a right of set-off,
counterclaim or recoupment which the Borrower or any of its Subsidiaries may now
or  hereafter  have  against  any  such  beneficiary,   the  Issuing  Bank,  the
Administrative Agent, the Lenders or any other Person for any reason whatsoever.
Such deposit shall be held as collateral securing the payment and performance of
the  Borrower's  and the  Guarantor's  obligations  under this Agreement and the
other Loan Documents. The Administrative Agent shall have exclusive dominion and
control,  including the exclusive right of withdrawal,  over such account. Other
than any interest earned on the investment of such deposits,  which  investments
shall be made at the written  request and instruction of the Borrower but at the
option and sole  discretion of the  Administrative  Agent and at the  Borrower's
risk and expense, such deposits shall not bear interest. Interest or profits, if
any,  on such  investments  shall  accumulate  in such  account.  Moneys in such
account  shall be applied by the  Administrative  Agent to reimburse the Issuing
Bank for LC  Disbursements  for  which it has not been  reimbursed  and,  to the
extent not so applied,  shall be held for the satisfaction of the  reimbursement
obligations of the Borrower for the LC Exposure at such time or, if the maturity
of the Loans has been  accelerated,  be applied to satisfy other  obligations of
the  Borrower  and  the  Guarantors  under  this  Agreement  or the  other  Loan
Documents.  If the Borrower is required to provide an amount of cash  collateral
hereunder as a result of the occurrence of an Event of Default, and the Borrower
is  not  otherwise  required  to  pay to the  Administrative  Agent  the  excess
attributable  to an LC Exposure in connection  with any  prepayment  pursuant to
Section 3.04(c), then such amount (to the extent not applied as aforesaid) shall
be returned  to the  Borrower  within  three  Business  Days after all Events of
Default have been cured or waived.

                                  ARTICLE III
              Payments of Principal and Interest; Prepayments; Fees

     Section 3.01 Repayment  of Loans.  The   Borrower   hereby  unconditionally
                  -------------------
promises to pay to the  Administrative  Agent for the account of each Lender the
then unpaid principal amount of each Loan on the Termination Date.

     Section 3.02 Interest.
                  --------

              (a) ABR Loans.  The Loans comprising each ABR Borrowing shall bear
                  ---------
interest at the Alternate Base Rate plus the Applicable  Margin, but in no event
to exceed the Highest Lawful Rate.

              (b) Eurodollar   Loans.  The   Loans  comprising  each  Eurodollar
                  ------------------
Borrowing  shall bear interest at the Adjusted LIBO Rate for the Interest Period
in effect for such  Borrowing  plus the  Applicable  Margin,  but in no event to
exceed the Highest Lawful Rate.

              (c) Post-Default  Rate.   Notwithstanding  the  foregoing,  if any
                  ------------------
principal of or interest on any Loan or any fee or other  amount  payable by the
Borrower or any Guarantor hereunder or under any other Loan Document is not paid
when due,  whether at stated  maturity,  upon  acceleration  or otherwise,  such
overdue amount shall bear interest,  after as well as before judgment, at a rate

                                       33



per annum equal to two  percent  (2%) plus the rate  applicable  to ABR Loans as
provided in Section 3.02(a), but in no event to exceed the Highest Lawful Rate.

              (d) Interest Payment Dates. Accrued interest on each Loan shall be
                  ----------------------
payable  in  arrears  on each  Interest  Payment  Date for such  Loan and on the
Termination Date; provided that (i) interest accrued pursuant to Section 3.02(c)
shall be payable on demand,  (ii) in the event of any repayment or prepayment of
any  Loan  (other  than an  optional  prepayment  of an ABR  Loan  prior  to the
Termination  Date),  accrued  interest on the principal amount repaid or prepaid
shall be payable on the date of such repayment or  prepayment,  and (iii) in the
event of any conversion of any  Eurodollar  Loan prior to the end of the current
Interest Period therefor,  accrued interest on such Loan shall be payable on the
effective date of such conversion.

              (e) Interest Rate  Computations.  All interest  hereunder shall be
                  ---------------------------
computed  on the  basis of a year of 360 days,  unless  such  computation  would
exceed the Highest  Lawful Rate, in which case interest shall be computed on the
basis of a year of 365 days (or 366 days in a leap year),  except that  interest
computed by reference  to the  Alternate  Base Rate at times when the  Alternate
Base Rate is based on the Prime Rate shall be computed on the basis of a year of
365 days (or 366 days in a leap year), and in each case shall be payable for the
actual  number of days elapsed  (including  the first day but excluding the last
day). The applicable  Alternate Base Rate, Adjusted LIBO Rate or LIBO Rate shall
be determined  by the  Administrative  Agent,  and such  determination  shall be
conclusive absent manifest error, and be binding upon the parties hereto.

     Section 3.03 Alternate Rate of Interest.  If prior to the  commencement  of
                  --------------------------
any Interest Period for a Eurodollar Borrowing:

              (a) the Administrative Agent determines (which determination shall
be conclusive  absent manifest error) that adequate and reasonable  means do not
exist for ascertaining the Adjusted LIBO Rate or the LIBO Rate for such Interest
Period; or

              (b) the  Administrative  Agent is advised by the Majority  Lenders
that the  Adjusted  LIBO Rate or LIBO Rate,  as  applicable,  for such  Interest
Period will not adequately and fairly reflect the cost to such Lenders of making
or maintaining their Loans included in such Borrowing for such Interest Period;

then the Administrative  Agent shall give notice thereof to the Borrower and the
Lenders by  telephone  or telecopy as promptly as  practicable  thereafter  and,
until the  Administrative  Agent  notifies the Borrower and the Lenders that the
circumstances  giving  rise to such  notice no longer  exist,  (i) any  Interest
Election   Request  that  requests  the  conversion  of  any  Borrowing  to,  or
continuation  of any Borrowing as, a Eurodollar  Borrowing shall be ineffective,
and  (ii)  if any  Borrowing  Request  requests  a  Eurodollar  Borrowing,  such
Borrowing shall be made as an ABR Borrowing.

     Section 3.04 Prepayments.
                  -----------

              (a) Optional Prepayments. The Borrower shall have the right at any
                  --------------------
time and from time to time to prepay any Borrowing in whole or in part,  subject
to prior notice in accordance with Section 3.04(b).

                                       34



              (b) Notice and Terms of Optional  Prepayment.  The Borrower  shall
                  ----------------------------------------
notify the  Administrative  Agent by  telephone  (confirmed  by telecopy) of any
prepayment  hereunder (i) in the case of  prepayment of a Eurodollar  Borrowing,
not later than 1:00 p.m.  Charlotte,  North Carolina  time,  three Business Days
before  the  date of  prepayment,  or (ii) in the case of  prepayment  of an ABR
Borrowing, not later than 1:00 p.m. Charlotte, North Carolina time, one Business
Day before the date of  prepayment.  Each such notice shall be  irrevocable  and
shall specify the prepayment date and the principal  amount of each Borrowing or
portion  thereof to be prepaid.  Promptly  following  receipt of any such notice
relating to a Borrowing,  the  Administrative  Agent shall advise the Lenders of
the contents  thereof.  Each partial  prepayment of any Borrowing shall be in an
amount that would be  permitted  in the case of an advance of a Borrowing of the
same Type as provided in Section 2.02.  Each  prepayment of a Borrowing shall be
applied  ratably to the Loans  included  in the prepaid  Borrowing.  Prepayments
shall be accompanied by accrued interest to the extent required by Section 3.02.

              (c) Mandatory Prepayments.
                  ---------------------

                  (i) If, after giving effect to any termination or reduction of
the Aggregate  Commitment  pursuant to Section 2.06(b),  the Aggregate Revolving
Credit Exposures exceeds the Aggregate  Commitments,  then the Borrower shall A.
prepay the Borrowings in an aggregate  principal amount equal to such excess, or
add to the  Mortgaged  Property,  Oil  and  Gas  Properties,  having  value,  as
determined by the  Administrative  Agent and the Majority  Lenders,  equal to or
greater than such excess, or a combination  thereof and B. if any excess remains
after prepaying all of the Borrowings as a result of an LC Exposure,  pay to the
Administrative  Agent on behalf of the Lenders an amount equal to such excess to
be held as cash collateral as provided in Section 2.08(k).  The Borrower will be
obligated to make such  prepayment,  provide such  collateral  and/or deposit of
cash collateral  within ninety (90) days following such termination or reduction
of the  Aggregate  Commitment;  provided  that all payments  required to be made
pursuant to this Section  3.04(c)(i) must be made on or prior to the Termination
Date.

                  (ii) Upon any  redetermination  of or adjustment to the amount
of the Borrowing Base in accordance with Section 2.07 or Section 8.13(c), if the
Aggregate  Revolving  Credit  Exposures  exceeds  the  redetermined  or adjusted
Borrowing Base, then the Borrower shall A. prepay the Borrowings in an aggregate
principal amount equal to such excess, or add to the Mortgaged Property, Oil and
Gas Properties,  having value, as determined by the Administrative Agent and the
Majority Lenders, equal to or greater than such excess, or a combination thereof
and B. if any excess  remains after  prepaying all of the Borrowings as a result
of an LC Exposure,  pay to the Administrative  Agent on behalf of the Lenders an
amount equal to such excess to be held as cash collateral as provided in Section
2.08(k).  The Borrower shall be obligated to make such prepayment,  provide such
collateral  and/or deposit of cash collateral  within ninety (90) days following
its receipt of the New Borrowing Base Notice in accordance  with Section 2.07(d)
or the date the  adjustment  occurs;  provided that all payments  required to be
made  pursuant  to this  Section  3.04(c)(ii)  must be made on or  prior  to the
Termination Date.

                  (iii) Upon any  adjustments  to the Borrowing Base pursuant to
Section 9.12(a), Section 9.13 or Section 9.21, if the Aggregate Revolving Credit
Exposures  exceeds the Borrowing  Base as adjusted,  then the Borrower  shall A.
prepay the Borrowings in an aggregate  principal amount equal to such excess, or
add to the  Mortgaged  Property,  Oil  and  Gas  Properties,  having  value,  as

                                       35



determined by the  Administrative  Agent and the Majority  Lenders,  equal to or
greater than such excess, or a combination  thereof and B. if any excess remains
after prepaying all of the Borrowings as a result of an LC Exposure,  pay to the
Administrative  Agent on behalf of the Lenders an amount equal to such excess to
be held as cash collateral as provided in Section 2.08(k). The Borrower shall be
obligated to make such  prepayment,  provide such  collateral  and/or deposit of
cash  collateral  within  ninety  (90) days  following  such  adjustment  to the
Borrowing Base (or, if sooner,  on the date the Borrower  receives cash proceeds
as a result of a  disposition  pursuant  to  Section  9.13);  provided  that all
payments required to be made pursuant to this Section  3.04(c)(iii) must be made
on or prior to the Termination Date.

                  (iv) Each  prepayment of  Borrowings  pursuant to this Section
3.04(c) shall be applied, first, ratably to any ABR Borrowings then outstanding,
and, second, to any Eurodollar Borrowings then outstanding, and if more than one
Eurodollar  Borrowing is then outstanding,  to each such Eurodollar Borrowing in
order of priority beginning with the Eurodollar  Borrowing with the least number
of days remaining in the Interest Period applicable  thereto and ending with the
Eurodollar  Borrowing  with the most number of days  remaining  in the  Interest
Period applicable thereto.

                  (v) Each  prepayment  of  Borrowings  pursuant to this Section
3.04(c)  shall  be  applied  ratably  to  the  Loans  included  in  the  prepaid
Borrowings. Prepayments pursuant to this Section 3.04(c) shall be accompanied by
accrued interest to the extent required by Section 3.02.

              (d) No Premium or Penalty. Prepayments permitted or required under
                  ---------------------
this Section 3.04 shall be without premium or penalty,  except as required under
Section 5.02.

     Section 3.05 Fees.
                  ----

              (a) Commitment   Fees.   The   Borrower   agrees  to  pay  to  the
                  -----------------
Administrative  Agent for the account of each  Lender a  commitment  fee,  which
shall accrue at the applicable Commitment Fee Rate on the daily unused amount of
the  Commitment  of such Lender during the period from and including the date of
this Agreement to but excluding the Termination  Date.  Accrued  commitment fees
shall be  payable  in  arrears  on the last day of March,  June,  September  and
December of each year and on the Termination Date,  commencing on the first such
date to occur after the date hereof.  All  commitment  fees shall be computed on
the  basis of a year of 360 days,  unless  such  computation  would  exceed  the
Highest  Lawful Rate, in which case interest shall be computed on the basis of a
year of 365 days (or 366 days in a leap  year),  and  shall be  payable  for the
actual  number of days elapsed  (including  the first day but excluding the last
day).

              (b) Letter of Credit Fees.  The Borrower  agrees to pay (i) to the
                  ---------------------
Administrative  Agent for the  account of each Lender a  participation  fee with
respect to its  participations  in Letters of Credit,  which shall accrue at the
same  Applicable  Margin used to  determine  the  interest  rate  applicable  to
Eurodollar  Loans on the  average  daily  amount of such  Lender's  LC  Exposure
(excluding any portion thereof  attributable  to unreimbursed LC  Disbursements)
during the period from and including the date of this Agreement to but excluding
the later of the date on which such Lender's Commitment  terminates and the date
on which such Lender ceases to have any LC Exposure,  (ii) to the Issuing Bank a
fronting fee,  which shall accrue at the rate of 0.125% per annum on the average

                                       36



daily amount of the LC Exposure  (excluding any portion thereof  attributable to
unreimbursed LC Disbursements)  during the period from and including the date of
this  Agreement to but  excluding  the later of the date of  termination  of the
Commitments  and the date on which there ceases to be any LC Exposure,  provided
that in no event shall such fee be less than $300 during any quarter,  and (iii)
to the Issuing Bank, for its own account,  its standard fees with respect to the
issuance,  amendment, renewal or extension of any Letter of Credit or processing
of drawings thereunder. Participation fees and fronting fees accrued through and
including the last day of March, June, September and December of each year shall
be payable on the third Business Day following such last day,  commencing on the
first such date to occur  after the date of this  Agreement;  provided  that all
such fees shall be payable on the  Termination  Date and any such fees  accruing
after the Termination Date shall be payable on demand. Any other fees payable to
the Issuing Bank  pursuant to this Section  3.05(b)  shall be payable  within 10
days after demand. All participation fees and fronting fees shall be computed on
the  basis of a year of 360 days,  unless  such  computation  would  exceed  the
Highest  Lawful Rate, in which case interest shall be computed on the basis of a
year of 365 days (or 366 days in a leap  year),  and  shall be  payable  for the
actual  number of days elapsed  (including  the first day but excluding the last
day).

              (c) Administrative  Agent Fees. The  Borrower agrees to pay to the
                  --------------------------
Administrative  Agent,  for its own account,  fees payable in the amounts and at
the times  separately  agreed upon between the  Borrower and the  Administrative
Agent.

                                   ARTICLE IV
               Payments; Pro Rata Treatment; Sharing of Set-offs.

     Section 4.01 Payments Generally; Pro Rata Treatment; Sharing of Set-offs.
                  -----------------------------------------------------------

              (a) Payments by the Borrower. The Borrower shall make each payment
                  ------------------------
required to be made by it hereunder  (whether of  principal,  interest,  fees or
reimbursement  of LC  Disbursements,  or of amounts  payable under Section 5.01,
Section 5.02,  Section 5.03 or otherwise)  prior to 1:00 p.m.  Charlotte,  North
Carolina time, on the date when due, in  immediately  available  funds,  without
defense, deduction,  recoupment, set-off or counterclaim. Fees, once paid, shall
not be refundable under any circumstances.  Any amounts received after such time
on any date may, in the  discretion of the  Administrative  Agent,  be deemed to
have  been  received  on the  next  succeeding  Business  Day  for  purposes  of
calculating   interest  thereon.   All  such  payments  shall  be  made  to  the
Administrative  Agent at its offices specified in Section 12.01, except payments
to be made directly to the Issuing Bank as expressly  provided herein and except
that payments pursuant to Section 5.01,  Section 5.02,  Section 5.03 and Section
12.03 shall be made directly to the Persons entitled thereto. The Administrative
Agent shall  distribute any such payments  received by it for the account of any
other Person to the appropriate recipient promptly following receipt thereof. If
any payment hereunder shall be due on a day that is not a Business Day, the date
for payment shall be extended to the next  succeeding  Business Day, and, in the
case of any payment accruing interest, interest thereon shall be payable for the
period of such extension. All payments hereunder shall be made in dollars.

              (b) Application  of  Insufficient   Payments.    If  at  any  time
                  ----------------------------------------
insufficient funds are received by and available to the Administrative  Agent to
pay fully all amounts of principal, unreimbursed LC Disbursements,  interest and

                                       37



fees then due hereunder,  such funds shall be applied (i) first, towards payment
of interest  and fees then due  hereunder,  ratably  among the parties  entitled
thereto in  accordance  with the amounts of  interest  and fees then due to such
parties,  and (ii) second,  towards  payment of principal  and  unreimbursed  LC
Disbursements then due hereunder,  ratably among the parties entitled thereto in
accordance with the amounts of principal and unreimbursed LC Disbursements  then
due to such parties.

              (c) Sharing of  Payments  by  Lenders.   If any Lender  shall,  by
                  ---------------------------------
exercising any right of set-off or counterclaim or otherwise,  obtain payment in
respect of any principal of or interest on any of its Loans or participations in
LC  Disbursements  resulting  in such  Lender  receiving  payment  of a  greater
proportion  of the  aggregate  amount  of its  Loans  and  participations  in LC
Disbursements  and accrued interest thereon than the proportion  received by any
other Lender,  then the Lender receiving such greater  proportion shall purchase
(for cash at face value)  participations  in the Loans and  participations in LC
Disbursements  of other  Lenders to the extent  necessary so that the benefit of
all such payments shall be shared by the Lenders  ratably in accordance with the
aggregate  amount of principal of and accrued interest on their respective Loans
and  participations  in  LC  Disbursements;   provided  that  (i)  if  any  such
participations  are purchased and all or any portion of the payment  giving rise
thereto is recovered,  such  participations  shall be rescinded and the purchase
price restored to the extent of such recovery,  without  interest,  and (ii) the
provisions  of this  Section  4.01(c)  shall  not be  construed  to apply to any
payment  made by the  Borrower  pursuant to and in  accordance  with the express
terms of this Agreement or any payment obtained by a Lender as consideration for
the  assignment  of  or  sale  of  a  participation  in  any  of  its  Loans  or
participations in LC Disbursements to any assignee or participant, other than to
the Borrower or any Subsidiary or Affiliate  thereof (as to which the provisions
of this Section 4.01(c) shall apply). The Borrower consents to the foregoing and
agrees,  to the extent it may  effectively do so under  applicable law, that any
Lender  acquiring a  participation  pursuant to the foregoing  arrangements  may
exercise against the Borrower rights of set-off and counterclaim with respect to
such  participation  as fully as if such  Lender  were a direct  creditor of the
Borrower in the amount of such participation.

     Section 4.02 Presumption   of  Payment   by  the   Borrower.    Unless  the
                  ----------------------------------------------
date on which any payment is due to the Administrative  Agent for the account of
the Lenders or the Issuing  Bank that the Borrower  will not make such  payment,
the  Administrative  Agent may assume that the Borrower has made such payment on
such date in  accordance  herewith  and may, in reliance  upon such  assumption,
distribute  to the Lenders or the Issuing  Bank,  as the case may be, the amount
due. In such event, if the Borrower has not in fact made such payment, then each
of the  Lenders or the Issuing  Bank,  as the case may be,  severally  agrees to
repay to the Administrative  Agent forthwith on demand the amount so distributed
to such  Lender or Issuing  Bank with  interest  thereon,  for each day from and
including the date such amount is distributed to it to but excluding the date of
payment  to the  Administrative  Agent,  at the  greater  of the  Federal  Funds
Effective Rate and a rate determined by the  Administrative  Agent in accordance
with banking industry rules on interbank compensation.

     Section 4.03 Certain Deductions by the Administrative  Agent. If any Lender
                  -----------------------------------------------
shall fail to make any  payment  required  to be made by it  pursuant to Section
2.05(b),   Section   2.08(e),   Section   2.08(f)  or  Section   4.02  then  the
Administrative  Agent  may,  in its  discretion  (notwithstanding  any  contrary

                                       38



provision hereof),  apply any amounts thereafter  received by the Administrative
Agent for the account of such Lender to satisfy such Lender's  obligations under
such Sections until all such unsatisfied obligations are fully paid.

     Section 4.04 Disposition of Proceeds.  The Security  Instruments contain an
                  -----------------------
assignment by the Borrower and/or the Material Subsidiaries unto and in favor of
the Administrative Agent for the benefit of the Lenders of all of the Borrower's
or each Material  Subsidiary's  interest in and to  production  and all proceeds
attributable  thereto  which may be produced  from or allocated to the Mortgaged
Property.   The  Security   Instruments  further  provide  in  general  for  the
application of such proceeds to the  satisfaction of the  Indebtedness and other
obligations   described  therein  and  secured  thereby.   Notwithstanding   the
assignment  contained in such Security  Instruments,  until the occurrence of an
Event of Default,  a. the  Administrative  Agent and the Lenders agree that they
will neither notify the purchaser or purchasers of such  production nor take any
other action to cause such proceeds to be remitted to the  Administrative  Agent
or the Lenders,  but the Lenders will instead permit such proceeds to be paid to
the Borrower and its Material  Subsidiaries  and b. the Lenders hereby authorize
the Administrative  Agent to take such actions as may be necessary to cause such
proceeds to be paid to the Borrower and/or such Material Subsidiaries.

                                   ARTICLE V
           Increased Costs; Break Funding Payments; Taxes; Illegality

     Section 5.01 Increased Costs.
                  ---------------

              (a) Eurodollar Changes in Law. If any Change in Law shall:
                  -------------------------

                  (i) impose,  modify or deem  applicable  any reserve,  special
deposit or similar  requirement  against  assets  of,  deposits  with or for the
account  of,  or  credit  extended  by,  any  Lender  (except  any such  reserve
requirement reflected in the Adjusted LIBO Rate); or

                  (ii) impose on any Lender or the London  interbank  market any
other  condition  affecting  this  Agreement  or  Eurodollar  Loans made by such
Lender;

and the result of any of the  foregoing  shall be to  increase  the cost to such
Lender of making or  maintaining  any  Eurodollar  Loan (or of  maintaining  its
obligation to make any such Loan) or to reduce the amount of any sum received or
receivable by such Lender  (whether of principal,  interest or otherwise),  then
the Borrower will pay to such Lender such  additional  amount or amounts as will
compensate such Lender for such additional costs incurred or reduction suffered.

              (b) Capital  Requirements.  If  any  Lender  or the  Issuing  Bank
                  ---------------------
determines that any Change in Law regarding  capital  requirements  has or would
have the effect of reducing  the rate of return on such  Lender's or the Issuing
Bank's  capital or on the capital of such Lender's or the Issuing Bank's holding
company,  if any, as a  consequence  of this  Agreement or the Loans made by, or
participations  in Letters of Credit  held by,  such  Lender,  or the Letters of
Credit  issued by the Issuing  Bank,  to a level below that which such Lender or
the Issuing Bank or such Lender's or the Issuing  Bank's  holding  company could
have  achieved  but for such  Change  in Law  (taking  into  consideration  such
Lender's or the Issuing Bank's policies and the policies of such Lender's or the
Issuing Bank's holding company with respect to capital adequacy), then from time

                                       39



to time the Borrower  will pay to such Lender or the Issuing  Bank,  as the case
may be, such additional  amount or amounts as will compensate such Lender or the
Issuing Bank or such Lender's or the Issuing Bank's holding company for any such
reduction suffered.

              (c) Certificates.  A  certificate  of a Lender or the Issuing Bank
                  ------------
setting forth the amount or amounts  necessary to compensate  such Lender or the
Issuing Bank or its holding company, as the case may be, as specified in Section
5.01(a) or (b) shall be delivered to the Borrower and shall be conclusive absent
manifest  error.  The Borrower shall pay such Lender or the Issuing Bank, as the
case may be,  the  amount  shown as due on any such  certificate  within 10 days
after receipt thereof.

              (d) Effect of Failure or Delay in Requesting Compensation. Failure
                  -----------------------------------------------------
or delay on the part of any Lender or the  Issuing  Bank to demand  compensation
pursuant to this Section 5.01 shall not  constitute a waiver of such Lender's or
the Issuing Bank's right to demand such compensation.

     Section 5.02 Break Funding Payments. In the event of (a) the payment of any
                  ----------------------
principal  of any  Eurodollar  Loan  other  than on the last day of an  Interest
Period applicable  thereto  (including as a result of an Event of Default),  (b)
the  conversion of any  Eurodollar  Loan into an ABR Loan other than on the last
day of the Interest  Period  applicable  thereto,  or (c) the failure to borrow,
convert,  continue or prepay any  Eurodollar  Loan on the date  specified in any
notice delivered  pursuant  hereto,  then, in any such event, the Borrower shall
compensate  each  Lender for the loss,  cost and  expense  attributable  to such
event.  In the case of a  Eurodollar  Loan,  such  loss,  cost or expense to any
Lender shall be deemed to include an amount  determined by such Lender to be the
excess,  if any, of (i) the amount of interest  which would have  accrued on the
principal amount of such Loan had such event not occurred,  at the Adjusted LIBO
Rate that would have been  applicable to such Loan, for the period from the date
of such event to the last day of the then current  Interest Period therefor (or,
in the case of a failure to borrow,  convert or  continue,  for the period  that
would  have been the  Interest  Period for such  Loan),  over (ii) the amount of
interest  which  would  accrue on such  principal  amount for such period at the
interest rate which such Lender would bid were it to bid, at the commencement of
such period,  for dollar  deposits of a comparable  amount and period from other
banks in the eurodollar market.

A certificate of any Lender setting forth any amount or amounts that such Lender
is entitled to receive pursuant to this Section 5.02 shall be delivered to the
Borrower and shall be conclusive absent manifest error. The Borrower shall pay
such Lender the amount shown as due on any such certificate within 10 days after
receipt thereof.

                                       40



     Section 5.03 Taxes.
                  -----

              (a) Payments Free of Taxes.  Any and all payments by or on account
                  ----------------------
of any  obligation  of the  Borrower or any Material  Subsidiary  under any Loan
Document  shall  be  made  free  and  clear  of and  without  deduction  for any
Indemnified  Taxes  or  Other  Taxes;  provided  that if the  Borrower  shall be
required to deduct any Indemnified Taxes or Other Taxes from such payments, then
(i) the sum payable  shall be  increased  as  necessary so that after making all
required deductions  (including deductions applicable to additional sums payable
under this Section 5.03(a)),  the Administrative  Agent,  Lender or Issuing Bank
(as the case may be) receives an amount equal to the sum it would have  received
had no such  deductions  been made, (ii) the Borrower shall make such deductions
and (iii)  the  Borrower  shall pay the full  amount  deducted  to the  relevant
Governmental Authority in accordance with applicable law.

              (b) Payment of Other Taxes by the Borrower. The Borrower shall pay
                  --------------------------------------
any Other  Taxes to the  relevant  Governmental  Authority  in  accordance  with
applicable law.

              (c) Indemnification by the Borrower.  The Borrower shall indemnify
                  -------------------------------
the Administrative Agent, each Lender and the Issuing Bank, within 10 days after
written demand therefor,  for the full amount of any Indemnified  Taxes or Other
Taxes paid by the Administrative  Agent, such Lender or the Issuing Bank, as the
case  may  be,  on or  with  respect  to any  payment  by or on  account  of any
obligation of the Borrower hereunder (including Indemnified Taxes or Other Taxes
imposed or asserted on or  attributable  to amounts  payable  under this Section
5.03) and any penalties,  interest and reasonable  expenses arising therefrom or
with respect thereto,  whether or not such Indemnified Taxes or Other Taxes were
correctly or legally imposed or asserted by the relevant Governmental Authority.
A certificate  of the  Administrative  Agent, a Lender or the Issuing Bank as to
the  amount of such  payment  or  liability  under  this  Section  5.03 shall be
delivered to the Borrower and shall be conclusive absent manifest error.

              (d) Evidence of Payments. As soon as practicable after any payment
                  --------------------
of Indemnified Taxes or Other Taxes by the Borrower to a Governmental Authority,
the  Borrower  shall  deliver  to the  Administrative  Agent the  original  or a
certified copy of a receipt  issued by such  Governmental  Authority  evidencing
such payment,  a copy of the return  reporting such payment or other evidence of
such payment reasonably satisfactory to the Administrative Agent.

              (e) Foreign  Lenders.  Any  Foreign  Lender that is entitled to an
                  ----------------
exemption from or reduction of withholding tax under the law of the jurisdiction
in which the Borrower is located,  or any treaty to which such jurisdiction is a
party,  with respect to payments under this Agreement or any other Loan Document
shall deliver to the Borrower (with a copy to the Administrative  Agent), at the
time or times prescribed by applicable law, such properly completed and executed
documentation  prescribed  by  applicable  law or  reasonably  requested  by the
Borrower as will permit such  payments to be made  without  withholding  or at a
reduced rate.

              (f) Tax  Refunds.   If  the  Administrative   Agent  or  a  Lender
                  ------------
determines,  in its reasonable discretion,  that it has received a refund of any
Taxes or Other Taxes as to which it has been indemnified by the Borrower or with
respect to which the  Borrower  has paid  additional  amounts  pursuant  to this
Section  5.03,  it shall pay over such refund to the  Borrower  (but only to the
extent of indemnity  payments made, or additional  amounts paid, by the Borrower
under this  Section 5.03 with respect to the Taxes or Other Taxes giving rise to

                                       41



such refund),  net of all out-of-pocket  expenses of the Administrative Agent or
such Lender and without  interest  (other than any interest paid by the relevant
Governmental  Authority  with  respect  to  such  refund);  provided,  that  the
Borrower, upon the request of the Administrative Agent or such Lender, agrees to
repay the amount  paid over to the  Borrower  (plus any  penalties,  interest or
other  charges   imposed  by  the  relevant   Governmental   Authority)  to  the
Administrative  Agent or such  Lender in the event the  Administrative  Agent or
such Lender is required  to repay such  refund to such  Governmental  Authority.
This Section 5.03 shall not be construed to require the Administrative  Agent or
any Lender to make available its tax returns (or any other information  relating
to its taxes which it deems confidential) to the Borrower or any other Person.

     Section 5.04 Designation  of   Different  Lending  Office.   If any  Lender
                  --------------------------------------------
requests  compensation under Section 5.01, or if the Borrower is required to pay
any  additional  amount to any  Lender  or any  Governmental  Authority  for the
account of any Lender  pursuant  to Section  5.03,  then such  Lender  shall use
reasonable  efforts to  designate  a  different  lending  office for  funding or
booking its Loans hereunder or to assign its rights and obligations hereunder to
another of its  offices,  branches or  affiliates,  if, in the  judgment of such
Lender,  such  designation or assignment  (i) would  eliminate or reduce amounts
payable  pursuant to Section  5.01 or Section  5.03,  as the case may be, in the
future  and (ii)  would not  subject  such  Lender to any  unreimbursed  cost or
expense and would not otherwise be  disadvantageous to such Lender. The Borrower
hereby agrees to pay all reasonable costs and expenses incurred by any Lender in
connection with any such designation or assignment.

     Section 5.05 Illegality.   Notwithstanding  any  other   provision  of this
                  ----------
Agreement,  in the  event  that  it  becomes  unlawful  for  any  Lender  or its
applicable lending office to honor its obligation to make or maintain Eurodollar
Loans either generally or having a particular  Interest Period  hereunder,  then
(a) such Lender shall promptly notify the Borrower and the Administrative  Agent
thereof and such  Lender's  obligation  to make such  Eurodollar  Loans shall be
suspended (the  "Affected  Loans") until such time as such Lender may again make
                 ---------------
and  maintain  such  Eurodollar  Loans and (b) all  Affected  Loans  which would
otherwise  be made by such Lender  shall be made  instead as ABR Loans (and,  if
such Lender so requests by notice to the Borrower and the Administrative  Agent,
all  Affected  Loans of such  Lender  then  outstanding  shall be  automatically
converted  into ABR Loans on the date  specified  by such Lender in such notice)
and, to the extent that Affected  Loans are so made as (or  converted  into) ABR
Loans,  all  payments  of  principal  which would  otherwise  be applied to such
Lender's Affected Loans shall be applied instead to its ABR Loans.

     Section 5.06 Replacement of Lenders.  If any  Lender requests  compensation
                  ----------------------
under Section 5.01, or if the Borrower is required to pay any additional  amount
to any  Lender or any  Governmental  Authority  for the  account  of any  Lender
pursuant to Section  5.03, or if any Lender  defaults in its  obligation to fund
Loans hereunder,  or if any Lender refuses to approve a Proposed  Borrowing Base
pursuant to Section 2.07(c)(iii) and as a result, the Borrower elects to replace
such dissenting Lender pursuant to Section  2.07(c)(iv),  then the Borrower may,
at  its  sole   expense  and  effort,   upon  notice  to  such  Lender  and  the
Administrative  Agent,  require  such  Lender to assign  and  delegate,  without
recourse  (in  accordance  with and  subject to the  restrictions  contained  in
Section  12.04(b)),  all  its  interests,  rights  and  obligations  under  this
Agreement to an assignee that shall assume such obligations  (which assignee may

                                       42



be another Lender, if a Lender accepts such  assignment);  provided that (i) the
Borrower  shall have  received the prior written  consent of the  Administrative
Agent, which consent shall not unreasonably be withheld,  (ii) such Lender shall
have  received  payment of an amount equal to the  outstanding  principal of its
Loans and participations in LC Disbursements,  accrued interest thereon, accrued
fees and all other amounts  payable to it  hereunder,  from the assignee (to the
extent of such  outstanding  principal  and  accrued  interest  and fees) or the
Borrower  (in the case of all other  amounts)  and (iii) in the case of any such
assignment  resulting  from a  claim  for  compensation  under  Section  5.01 or
payments  required to be made pursuant to Section  5.03,  such  assignment  will
result in a reduction in such  compensation  or payments.  A Lender shall not be
required to make any such  assignment and  delegation  if, prior  thereto,  as a
result of a waiver by such Lender or otherwise,  the circumstances entitling the
Borrower to require such assignment and delegation cease to apply.

                                   ARTICLE VI
                              Conditions Precedent

     Section 6.01 Effective  Date. The  obligations of the Lenders to make Loans
                  ---------------
and of the Issuing Bank to issue  Letters of Credit  hereunder  shall not become
effective until the date on which each of the following  conditions is satisfied
(or waived in accordance with Section 12.02):

              (a) The  Administrative  Agent  shall have  received  all fees and
other  amounts due and  payable on or prior to the  Effective  Date,  including,
without limitation,  to the extent invoiced,  reimbursement or payment of all of
the Administrative Agent's out-of-pocket expenses including, without limitation,
the reasonable fees, charges and disbursements of counsel for the Administrative
Agent, required to be reimbursed or paid by the Borrower hereunder.

              (b) The Administrative  Agent shall have received a certificate of
the  Secretary  or an  Assistant  Secretary  of each of the  Borrower  and  each
Guarantor  setting forth (i)  resolutions of its board of directors with respect
to the  authorization  of the Borrower or such  Guarantor to execute and deliver
the Loan  Documents  to which it is a party and to enter  into the  transactions
contemplated  in those  documents,  (ii) the  officers  of the  Borrower or such
Guarantor  (y) who are  authorized  to sign the  Loan  Documents  to  which  the
Borrower  or such  Guarantor  is a party and (z) who  will,  until  replaced  by
another  officer  or  officers  duly  authorized  for that  purpose,  act as its
representative  for the  purposes of signing  documents  and giving  notices and
other  communications  in connection  with this  Agreement and the  transactions
contemplated hereby, (iii) specimen signatures of such authorized officers,  and
(iv) the articles or certificate of incorporation and bylaws of the Borrower and
such Guarantor,  certified as being true and complete.  The Administrative Agent
and  the  Lenders  may  conclusively   rely  on  such   certificate   until  the
Administrative  Agent  receives  notice  in  writing  from the  Borrower  to the
contrary.

              (c) The Administrative  Agent shall have received  certificates of
the appropriate State agencies with respect to the existence,  qualification and
good standing of the Borrower and each Guarantor.

              (d) The  Administrative  Agent  shall have  received a  compliance
certificate  which  shall be  substantially  in the form of  Exhibit B, duly and
properly executed by a Responsible Officer and dated as of the Effective Date.

                                       43



              (e) The  Administrative  Agent  shall have  received  the  Initial
Reserve Report.

              (f) The  Administrative  Agent shall have received from each party
hereto  counterparts  (in such number as may be requested by the  Administrative
Agent) of this Agreement signed on behalf of such party.

              (g) The  Administrative  Agent shall have  received  duly executed
Notes  payable to the order of each  Lender in a principal  amount  equal to its
Commitment dated as of the date hereof.

              (h) The  Administrative  Agent shall have received from each party
thereto  duly  executed  and  completed  counterparts  (in such number as may be
requested by the Administrative  Agent) of the Security  Instruments,  including
the Pledge, the Guaranty Agreement and the other Security Instruments  described
on Exhibit D-1. In  connection  with the  execution and delivery of the Security
Instruments, the Administrative Agent shall:

                  (i) be  reasonably  satisfied  that the  Security  Instruments
create  first  priority,   perfected  Liens  (subject  only  to  Excepted  Liens
identified in clauses (a) to (d) and (f) of the definition thereof,  but subject
to the  provisos  at the end of such  definition)  on at least  70% of the total
value of the Oil and Gas  Properties  evaluated  in the Initial  Reserve  Report
sufficient in the reasonable  opinion of the  Administrative  Agent to justify a
Borrowing Base of $400,000,000 on the Effective Date hereof; and

                  (ii) have received certificates,  together with undated, blank
stock  powers  for each such  certificate,  representing  all of the  issued and
outstanding Equity Interests of each of the Guarantors.

              (i) The  Administrative  Agent  shall have  received an opinion of
Ballard Spahr Andrews & Ingersoll,  LLP, special counsel to the Borrower and
the Guarantors, substantially in the form of Exhibit C hereto.

              (j) The Administrative  Agent shall have received a certificate of
insurance  coverage of the  Borrower  evidencing  that the  Borrower is carrying
insurance in accordance with Section 7.13.

              (k) The  Administrative  Agent shall have received copies of title
information  in form and substance  satisfactory  to the  Administrative  Agent,
setting  forth the status of title to at least 70% of the total value of the Oil
and  Gas   Properties   evaluated  in  the  Initial   Reserve   Report  and  the
Administrative  Agent  shall be  reasonably  satisfied  with the status of title
reflected therein.

              (l) The  Administrative  Agent shall be reasonably  satisfied with
the  environmental  condition of the Oil and Gas  Properties of the Borrower and
its Material Subsidiaries.

              (m) The Administrative  Agent shall have received a certificate of
a Responsible  Officer of the Borrower certifying that the Borrower has received
all consents and approvals required by Section 7.03.

                                       44



              (n) The  Administrative  Agent shall have  received the  financial
statements  referred  to in  Section  7.04(a)  and the  Initial  Reserve  Report
accompanied by a certificate covering the matters described in Section 8.12(c).

              (o) The Administrative  Agent shall have received  appropriate UCC
search  certificates  reflecting no prior Liens  encumbering  the Properties the
Borrower and the Material Subsidiaries for each of the following  jurisdictions:
Colorado,  Delaware,  Louisiana,  Montana, New Mexico,  North Dakota,  Oklahoma,
Texas,  Utah,  and  Wyoming  and  any  other   jurisdiction   requested  by  the
Administrative Agent; other than those being assigned or released on or prior to
the Effective Date or Liens permitted by Section 9.03.

              (p) The  proceeds  of the  initial  Loans  shall be used to renew,
rearrange,  modify and extend the outstanding  amounts under the Existing Credit
Agreement and all  "Commitments"  (as defined in the Existing Credit  Agreement)
thereunder shall have been terminated.

              (q) The  Administrative  Agent  shall  have  received  such  other
documents as the  Administrative  Agent or special counsel to the Administrative
Agent may reasonably request.

     The  Administrative  Agent shall notify the Borrower and the Lenders of the
Effective Date, and such notice shall be conclusive and binding. Notwithstanding
the foregoing,  the  obligations of the Lenders to make Loans and of the Issuing
Bank to issue Letters of Credit hereunder shall not become effective unless each
of the foregoing  conditions is satisfied (or waived  pursuant to Section 12.02)
at or prior to 3:00 p.m.,  Charlotte,  North  Carolina  time,  on April 14, 2005
(and,  in the  event  such  conditions  are  not so  satisfied  or  waived,  the
Commitments shall terminate at such time).

     Section 6.02 Each Credit  Event.  The  obligation  of each Lender to make a
                  ------------------
Loan on the occasion of any Borrowing  (including the initial  funding),  and of
the  Issuing  Bank to issue,  amend,  renew or extend any  Letter of Credit,  is
subject to the satisfaction of the following conditions:

              (a) At the time of and  immediately  after  giving  effect to such
Borrowing  or the  issuance,  amendment,  renewal or extension of such Letter of
Credit, as applicable, no Default shall have occurred and be continuing.

              (b) At the time of and  immediately  after  giving  effect to such
Borrowing  or the  issuance,  amendment,  renewal or extension of such Letter of
Credit, as applicable, no Material Adverse Effect shall have occurred.

              (c) The  representations  and  warranties  of the Borrower and the
Guarantors set forth in this Agreement and in the other Loan Documents  shall be
true  and  correct  in all  material  respects  on and as of the  date  of  such
Borrowing  or the date of  issuance,  amendment,  renewal or  extension  of such
Letter of Credit, as applicable,  except to the extent any such  representations
and warranties  are expressly  limited to an earlier date, in which case, on and
as of the date of such Borrowing or the date of issuance,  amendment, renewal or
extension of such Letter of Credit,  as  applicable,  such  representations  and
warranties  shall continue to be true and correct as of such  specified  earlier
date.

                                       45



              (d) The making of such Loan or the issuance, amendment, renewal or
extension of such Letter of Credit,  as applicable,  would not conflict with, or
cause any  Lender or the  Issuing  Bank to violate  or  exceed,  any  applicable
Governmental  Requirement,  and no  Change in Law shall  have  occurred,  and no
litigation  shall be pending or  threatened,  which does or, with respect to any
threatened  litigation,  seeks to, enjoin,  prohibit or restrain,  the making or
repayment of any Loan, the issuance,  amendment, renewal, extension or repayment
of any Letter of Credit or any participations therein or the consummation of the
transactions contemplated by this Agreement or any other Loan Document.

              (e) The receipt by the Administrative Agent of a Borrowing Request
in  accordance  with  Section  2.03 or a  request  for a  Letter  of  Credit  in
accordance with Section 2.08(b), as applicable.

     Each  Borrowing and each issuance,  amendment,  renewal or extension of any
Letter of Credit shall be deemed to constitute a representation  and warranty by
the Borrower on the date thereof as to the matters  specified in Section 6.02(a)
through (e).

                                  ARTICLE VII
                         Representations and Warranties

     The Borrower represents and warrants to the Lenders that:

     Section 7.01 Organization;  Powers.  Each  of the Borrower and the Material
                  ---------------------
Subsidiaries is duly organized,  validly existing and in good standing under the
laws of the  jurisdiction  of its  organization,  has all  requisite  power  and
authority, and has all material governmental licenses, authorizations,  consents
and approvals  necessary,  to own its assets and to carry on its business as now
conducted, and is qualified to do business in, and is in good standing in, every
jurisdiction where such qualification is required,  except where failure to have
such  power,  authority,  licenses,  authorizations,   consents,  approvals  and
qualifications  could not  reasonably  be  expected  to have a Material  Adverse
Effect.

     Section 7.02 Authority;  Enforceability.  The  Transactions  are within the
                  --------------------------
Borrower's and each  Guarantor's  corporate powers and have been duly authorized
by all  necessary  corporate  and, if required,  stockholder  action.  Each Loan
Document  to which  the  Borrower  and each  Guarantor  is a party has been duly
executed and  delivered by the Borrower and such  Guarantor  and  constitutes  a
legal,  valid and binding  obligation  of the  Borrower and such  Guarantor,  as
applicable,  enforceable  in  accordance  with its terms,  subject to applicable
bankruptcy,  insolvency,  reorganization,  moratorium  or other  laws  affecting
creditors'  rights  generally  and  subject  to  general  principles  of equity,
regardless of whether considered in a proceeding in equity or at law.

     Section 7.03 Approvals;  No Conflicts.  The Transactions (a) do not require
                  ------------------------
any consent or approval of, registration or filing with, or any other action by,
any Governmental  Authority or any other third Person,  nor is any such consent,
approval,  registration,  filing or other action  necessary  for the validity or
enforceability  of any Loan  Document or the  consummation  of the  transactions
contemplated thereby,  except such as have been obtained or made and are in full
force and  effect  other  than (i) the  recording  and  filing  of the  Security

                                       46



Instruments as required by this  Agreement and (ii) those third party  approvals
or consents which, if not made or obtained, would not cause a Default hereunder,
could not  reasonably  be expected to have a Material  Adverse  Effect or do not
have an adverse effect on the enforceability of the Loan Documents, (b) will not
violate  any  applicable  law or  regulation  or the  charter,  by-laws or other
organizational documents of the Borrower or any Material Subsidiary or any order
of any Governmental Authority, (c) will not violate or result in a default under
any indenture,  agreement or other  instrument  binding upon the Borrower or any
Material  Subsidiary or its  Properties,  or give rise to a right  thereunder to
require any payment to be made by the Borrower or such Material  Subsidiary  and
(d) will not result in the creation or imposition of any Lien on any Property of
the Borrower or any  Material  Subsidiary  (other than the Liens  created by the
Loan Documents).

     Section 7.04 Financial Condition; No Material Adverse Change.
                  -----------------------------------------------

              (a) The  Borrower  has  heretofore  furnished  to the  Lenders its
consolidated  balance sheet and  statements of income,  stockholders  equity and
cash flows as of and for the fiscal year ended December 31, 2004, reported on by
Deloitte & Touche, independent public accountants. Such financial statements
present fairly, in all material respects,  the financial position and results of
operations and cash flows of the Borrower and its  Consolidated  Subsidiaries as
of such date and for such period in accordance with GAAP.

              (b) Since  December  31,  2004,  (i)  there  has been no  material
adverse  change in the  business,  assets,  operations,  prospects or condition,
financial or otherwise, of the Borrower and its Material Subsidiaries,  taken as
a whole and (ii) the business of the Borrower and its Material  Subsidiaries has
been  conducted  only in the  ordinary  course  consistent  with  past  business
practices.

              (c) Neither the Borrower nor any  Material  Subsidiary  has on the
date hereof (i) any  material  Debt  (including  Disqualified  Capital  Stock) ,
except as referred to or reflected or provided for in the Financial  Statements,
or  (ii)  any  contingent   liabilities,   off-balance   sheet   liabilities  or
partnerships, liabilities for taxes, unusual forward or long-term commitments or
unrealized or  anticipated  losses from any  unfavorable  commitments,  incurred
outside the ordinary  course of the  Borrower's  or such  Material  Subsidiary's
business.

     Section 7.05 Litigation.
                  ----------

              (a) Except as set forth on  Schedule  7.05,  there are no material
actions,  suits,  investigations  or  proceedings by or before any arbitrator or
Governmental  Authority  pending  against or, to the  knowledge of the Borrower,
threatened against or affecting the Borrower or any Material  Subsidiary (i) not
fully covered by insurance (except for normal  deductibles) as to which there is
a  reasonable  possibility  of  an  adverse  determination  that,  if  adversely
determined,  could reasonably be expected,  individually or in the aggregate, to
result in a Material  Adverse Effect,  or (ii) that involve any Loan Document or
the Transactions.

              (b) Since the date of this Agreement,  there has been no change in
the status of the matters  disclosed in Schedule 7.05 that,  individually  or in
the  aggregate,  has resulted in, or materially  increased the  likelihood of, a
Material Adverse Effect.

                                       47



     Section  7.06  Environmental  Matters.  Except as could  not be  reasonably
                    ----------------------
expected to have a Material  Adverse Effect (or with respect to (c), (d) and (e)
below,  where the failure to take such actions could not be reasonably  expected
to have a Material Adverse Effect):

              (a)  neither  any   Property  of  the  Borrower  or  any  Material
Subsidiary nor the operations conducted thereon violate any order or requirement
of any court or Governmental Authority or any Environmental Laws.

              (b) no Property of the Borrower or any Material Subsidiary nor the
operations currently conducted thereon or, to the knowledge of the Borrower,  by
any prior owner or operator of such Property or  operation,  are in violation of
or subject to any existing,  pending or threatened action, suit,  investigation,
inquiry or proceeding by or before any court or Governmental Authority or to any
remedial obligations under Environmental Laws.

              (c) all  notices,  permits,  licenses,  exemptions,  approvals  or
similar  authorizations,  if any, required to be obtained or filed in connection
with the  operation  or use of any and all  Property  of the  Borrower  and each
Material Subsidiary,  including,  without limitation, past or present treatment,
storage,  disposal  or release of a  hazardous  substance,  oil and gas waste or
solid waste into the  environment,  have been duly  obtained  or filed,  and the
Borrower  and each  Material  Subsidiary  are in  compliance  with the terms and
conditions of all such notices, permits, licenses and similar authorizations.

              (d) all hazardous  substances,  solid waste and oil and gas waste,
if any,  generated  at any and all  Property  of the  Borrower  or any  Material
Subsidiary  have in the  past  been  transported,  treated  and  disposed  of in
accordance  with  Environmental  Laws  and so as not to  pose  an  imminent  and
substantial endangerment to public health or welfare or the environment, and, to
the knowledge of the  Borrower,  all such  transport  carriers and treatment and
disposal facilities have been and are operating in compliance with Environmental
Laws and so as not to pose an imminent and  substantial  endangerment  to public
health or welfare or the  environment,  and are not the subject of any existing,
pending or  threatened  action,  investigation  or  inquiry by any  Governmental
Authority in connection with any Environmental Laws.

              (e) the  Borrower  has  taken all steps  reasonably  necessary  to
determine and has determined that no oil, hazardous  substances,  solid waste or
oil and gas waste,  have been  disposed of or  otherwise  released and there has
been no threatened release of any oil, hazardous substances,  solid waste or oil
and gas waste on or to any Property of the  Borrower or any Material  Subsidiary
except in compliance with  Environmental  Laws and so as not to pose an imminent
and substantial endangerment to public health or welfare or the environment.

              (f) to the extent  applicable,  all  Property of the  Borrower and
each  Material  Subsidiary  currently  satisfies  all  design,   operation,  and
equipment  requirements  imposed by the OPA, and the Borrower  does not have any
reason to believe that such Property, to the extent subject to the OPA, will not
be able to maintain compliance with the OPA requirements during the term of this
Agreement.

                                       48



              (g) neither the Borrower nor any Material Subsidiary has any known
contingent  liability  or  Remedial  Work in  connection  with  any  release  or
threatened release of any oil, hazardous  substance,  solid waste or oil and gas
waste into the environment.

     Section 7.07 Compliance with the Laws and Agreements; No Defaults.
                  ----------------------------------------------------

              (a)  Each of the  Borrower  and  each  Material  Subsidiary  is in
compliance with all Governmental  Requirements  applicable to it or its Property
and all agreements and other  instruments  binding upon it or its Property,  and
possesses all licenses,  permits,  franchises,  exemptions,  approvals and other
governmental  authorizations necessary for the ownership of its Property and the
conduct of its business,  except where the failure to do so,  individually or in
the aggregate,  could not reasonably be expected to result in a Material Adverse
Effect.

              (b) Neither the Borrower nor any Material Subsidiary is in default
nor has any event or circumstance  occurred which, but for the expiration of any
applicable  grace period or the giving of notice,  or both,  would  constitute a
default or would require the Borrower or a Material Subsidiary to Redeem or make
any offer to do any of the foregoing under any indenture, note, credit agreement
or instrument  pursuant to which any Material  Indebtedness is outstanding or by
which the  Borrower or any Material  Subsidiary  or any of their  Properties  is
bound.

              (c) No Default has occurred and is continuing.

     Section 7.08 Investment   Company  Act.   Neither  the   Borrower  nor  any
                  -------------------------
Subsidiary  is  an  "investment   company"  or  a  company  "controlled"  by  an
"investment company," within the meaning of, or subject to regulation under, the
Investment Company Act of 1940, as amended.

     Section 7.09 Public Utility Holding  Company Act.  Neither the Borrower nor
                  -----------------------------------
any Subsidiary is a "holding  company," or a "subsidiary  company" of a "holding
company," or an "affiliate" of a "holding company" or of a "subsidiary  company"
of a "holding  company," or a "public utility" within the meaning of, or subject
to regulation under, the Public Utility Holding Company Act of 1935, as amended.

     Section 7.10 Taxes.  Each of the Borrower and its  Subsidiaries  has timely
                  -----
filed or caused to be filed all Tax returns  and  reports  required to have been
filed and has paid or caused to be paid all Taxes  required to have been paid by
it,  except (a) Taxes  that are being  contested  in good  faith by  appropriate
proceedings and for which the Borrower or such  Subsidiary,  as applicable,  has
set aside on its books adequate  reserves in accordance  with GAAP or (b) to the
extent that the failure to do so could not reasonably be expected to result in a
Material Adverse Effect. The charges,  accruals and reserves on the books of the
Borrower and its Subsidiaries in respect of Taxes and other governmental charges
are, in the reasonable opinion of the Borrower,  adequate.  No Tax Lien has been
filed and, to the  knowledge of the  Borrower,  no claim is being  asserted with
respect to any such Tax or other such governmental charge.

     Section 7.11 ERISA.
                  -----

              (a) The Borrower,  the  Subsidiaries and each ERISA Affiliate have
complied in all material  respects with ERISA and,  where  applicable,  the Code
regarding each Plan.

                                       49



              (b)  Each  Plan  is,  and  has  been,  maintained  in  substantial
compliance with ERISA and, where applicable, the Code.

              (c) No act,  omission  or  transaction  has  occurred  which could
result in  imposition  on the Borrower,  any  Subsidiary or any ERISA  Affiliate
(whether directly or indirectly) of (i) either a civil penalty assessed pursuant
to subsections (c), (i) or (l) of section 502 of ERISA or a tax imposed pursuant
to  Chapter  43 of  Subtitle  D of the Code or (ii)  breach  of  fiduciary  duty
liability damages under section 409 of ERISA.

              (d) No Plan (other than a defined  contribution plan) or any trust
created  under any such Plan has been  terminated  since  September 2, 1974.  No
liability to the PBGC (other than for the payment of current  premiums which are
not past due) by the Borrower, any Subsidiary or any ERISA Affiliate has been or
is  expected  by the  Borrower,  any  Subsidiary  or any ERISA  Affiliate  to be
incurred  with respect to any Plan.  No ERISA Event with respect to any Plan has
occurred.

              (e) Full payment  when due has been made of all amounts  which the
Borrower, the Subsidiaries or any ERISA Affiliate is required under the terms of
each Plan or applicable law to have paid as contributions to such Plan as of the
date hereof, and no accumulated funding deficiency (as defined in section 302 of
ERISA and section 412 of the Code),  whether or not waived,  exists with respect
to any Plan.

              (f) The actuarial  present value of the benefit  liabilities under
each Plan which is  subject to Title IV of ERISA does not,  as of the end of the
Borrower's  most  recently  ended fiscal year,  exceed the current  value of the
assets  (computed on a plan  termination  basis in  accordance  with Title IV of
ERISA) of such Plan allocable to such benefit  liabilities.  The term "actuarial
present value of the benefit  liabilities"  shall have the meaning  specified in
section 4041 of ERISA.

              (g) Neither the Borrower, the Subsidiaries nor any ERISA Affiliate
sponsors,  maintains,  or  contributes to an employee  welfare  benefit plan, as
defined in section 3(1) of ERISA, including,  without limitation,  any such plan
maintained to provide  benefits to former  employees of such entities,  that may
not be terminated by the  Borrower,  a Subsidiary or any ERISA  Affiliate in its
sole discretion at any time without any material liability.

              (h) Neither the Borrower, the Subsidiaries nor any ERISA Affiliate
sponsors, maintains or contributes to, or has at any time in the six-year period
preceding  the  date  hereof  sponsored,   maintained  or  contributed  to,  any
Multiemployer Plan.

              (i) Neither the Borrower, the Subsidiaries nor any ERISA Affiliate
is required to provide  security  under section  401(a)(29) of the Code due to a
Plan amendment that results in an increase in current liability for the Plan.

     Section 7.12 Disclosure;  No  Material  Misstatements.   The  Borrower  has
                  ----------------------------------------
disclosed  to the Lenders all  agreements,  instruments  and  corporate or other
restrictions to which it or any of its Material Subsidiaries is subject, and all
other  matters  known  to it,  that,  individually  or in the  aggregate,  could
reasonably  be  expected  to result in a Material  Adverse  Effect.  Neither the
Information  Memorandum  nor any of the  other  reports,  financial  statements,

                                       50



certificates or other  information  furnished by or on behalf of the Borrower or
any  Material  Subsidiary  to the  Administrative  Agent or any Lender or any of
their  Affiliates in connection  with the  negotiation  of this Agreement or any
other Loan Document or delivered  hereunder or under any other Loan Document (as
modified  or  supplemented  by other  information  so  furnished)  contains  any
material  misstatement  of fact or omits to state any material fact necessary to
make the statements  therein, in the light of the circumstances under which they
were made, not misleading;  provided that,  with respect to projected  financial
information,  the Borrower represents only that such information was prepared in
good faith based upon  assumptions  believed to be reasonable at the time. There
is no fact  peculiar to the  Borrower  or any  Material  Subsidiary  which could
reasonably  be  expected to have a Material  Adverse  Effect or in the future is
reasonably  likely to have a Material  Adverse Effect and which has not been set
forth  in  this  Agreement  or  the  Loan  Documents  or  the  other  documents,
certificates and statements furnished to the Administrative Agent or the Lenders
by or on behalf of the Borrower or any Material  Subsidiary prior to, or on, the
date hereof in connection with the transactions  contemplated  hereby. There are
no material statements or conclusions in any Reserve Report which are based upon
or  include  misleading  information  or  fail  to take  into  account  material
information regarding the matters reported therein.

     Section 7.13 Insurance.   The Borrower has, and has caused all its Material
                  ---------
Subsidiaries to have, (a) all insurance  policies  sufficient for the compliance
by each of them with all  material  Governmental  Requirements  and all material
agreements and (b) insurance  coverage in at least amounts and against such risk
(including,  without  limitation,  public  liability)  that are usually  insured
against by  companies  similarly  situated  and engaged in the same or a similar
business  for the  assets  and  operations  of the  Borrower  and  its  Material
Subsidiaries.

     Section 7.14 Restriction  on Liens.  Neither  the  Borrower  nor any of the
                  ---------------------
Material Subsidiaries is a party to any material agreement or arrangement (other
than Capital Leases creating Liens permitted by Section  9.03(c),  but then only
on the  Property  subject  of such  Capital  Lease),  or  subject  to any order,
judgment,  writ or decree,  which  either  restricts or purports to restrict its
ability  to grant  Liens to the  Administrative  Agent and the  Lenders on or in
respect of their Properties to secure the Indebtedness and the Loan Documents.

     Section 7.15 Subsidiaries.  Except  as  set forth  on  Schedule  7.15 or as
                  ------------
disclosed in writing to the Administrative Agent (which shall promptly furnish a
copy to the Lenders), which shall be a supplement to Schedule 7.15, the Borrower
has no Subsidiaries. Schedule 7.15 identifies each Subsidiary that is a Material
Subsidiary,  and each Material  Subsidiary  on such  schedule is a  Wholly-Owned
Subsidiary.

     Section 7.16 Location of Business and Offices. The Borrower's  jurisdiction
                  --------------------------------
of  organization  is Delaware;  the name of the Borrower as listed in the public
records of its  jurisdiction of organization is St. Mary Land &  Exploration
Company;  and the  organizational  identification  number of the Borrower in its
jurisdiction  of  organization  is  44728.  The  Borrower's  principal  place of
business  and chief  executive  offices are located at the address  specified in
Section 12.01 (or as set forth in a notice delivered pursuant to Section 8.01(m)
and Section 12.01(c)).  Each Material Subsidiary's jurisdiction of organization,
name as  listed in the  public  records  of its  jurisdiction  of  organization,
organizational  identification  number in its jurisdiction of organization,  and
the location of its principal place of business and chief

                                       51



executive  office  is  stated  on  Schedule  7.15  (or as set  forth in a notice
delivered pursuant to Section 8.01(m)).

     Section 7.17 Properties;  Titles,  Etc.  Except for matters which could not
                  -------------------------
reasonably be expected to have a Material Adverse Effect:

              (a) Each of the Borrower and the  Material  Subsidiaries  has good
and  defensible  title  to the Oil  and Gas  Properties  evaluated  in the  most
recently delivered Reserve Report and good title to all its personal Properties,
in each case,  free and clear of all Liens  except  Liens  permitted  by Section
9.03.  After  giving  full effect to the  Excepted  Liens,  the  Borrower or the
Material Subsidiary  specified as the owner owns the net interests in production
attributable  to the  Hydrocarbon  Interests as  reflected in the most  recently
delivered Reserve Report,  and the ownership of such Properties shall not in any
material respect  obligate the Borrower or such Material  Subsidiary to bear the
costs and expenses  relating to the  maintenance,  development and operations of
each such  Property  in an amount in  excess  of the  working  interest  of each
Property set forth in the most  recently  delivered  Reserve  Report that is not
offset by a  corresponding  proportionate  increase  in the  Borrower's  or such
Material Subsidiary's net revenue interest in such Property.

              (b) All material  leases and agreements  necessary for the conduct
of the  business of the Borrower  and the  Material  Subsidiaries  are valid and
subsisting,  in full force and effect,  and there  exists no default or event or
circumstance  which  with the  giving of notice or the  passage  of time or both
would give rise to a default under any such lease or leases,  which would affect
in any  material  respect the conduct of the  business of the  Borrower  and the
Material Subsidiaries, taken as a whole.

              (c) The rights and Properties  presently owned, leased or licensed
by the Borrower and the Material Subsidiaries including, without limitation, all
easements  and rights of way,  include all rights and  Properties  necessary  to
permit the Borrower and the Material  Subsidiaries  to conduct their business in
all  material  respects in the same manner as its  business  has been  conducted
prior to the date hereof.

              (d)  All of  the  Properties  of the  Borrower  and  the  Material
Subsidiaries  which  are  reasonably   necessary  for  the  operation  of  their
businesses are in good working  condition and are maintained in accordance  with
prudent business standards.

              (e) The Borrower and each Material Subsidiary owns, or is licensed
to use, all trademarks,  tradenames,  copyrights, patents and other intellectual
Property material to its business,  and the use thereof by the Borrower and such
Material  Subsidiary  does not  infringe  upon the  rights of any other  Person,
except for any such infringements that, individually or in the aggregate,  could
not reasonably be expected to result in a Material Adverse Effect.  The Borrower
and its Material  Subsidiaries either own or have valid licenses or other rights
to use all databases,  geological  data,  geophysical  data,  engineering  data,
seismic data,  maps,  interpretations  and other technical  information  used in
their businesses as presently conducted, subject to the limitations contained in
the agreements  governing the use of the same,  which  limitations are customary
for  companies  engaged in the business of the  exploration  and  production  of

                                       52



Hydrocarbons, with such exceptions as could not reasonably be expected to have a
Material Adverse Effect.

     Section 7.18 Maintenance of Properties. Except for such acts or failures to
                  -------------------------
act as could not be reasonably  expected to have a Material Adverse Effect,  the
Oil and Gas Properties (and Properties unitized therewith) have been maintained,
operated and developed in a good and  workmanlike  manner and in conformity with
all Government Requirements and in conformity with the provisions of all leases,
subleases or other contracts comprising a part of the Hydrocarbon  Interests and
other  contracts and  agreements  forming a part of the Oil and Gas  Properties.
Specifically in connection with the foregoing,  except for those as could not be
reasonably  expected  to  have a  Material  Adverse  Effect,  (i) no Oil and Gas
Property is subject to having  allowable  production  reduced below the full and
regular allowable  (including the maximum permissible  tolerance) because of any
overproduction  (whether or not the same was  permissible  at the time) and (ii)
none of the wells comprising a part of the Oil and Gas Properties (or Properties
unitized  therewith)  is  deviated  from the  vertical  more  than  the  maximum
permitted  by  Government  Requirements,  and such wells are, in fact,  bottomed
under and are producing from, and the well bores are wholly within,  the Oil and
Gas  Properties  (or in  the  case  of  wells  located  on  Properties  unitized
therewith,  such unitized  Properties).  All  pipelines,  wells,  gas processing
plants, platforms and other material improvements,  fixtures and equipment owned
in whole or in part by the Borrower or any of its Material Subsidiaries that are
necessary to conduct normal  operations are being maintained in a state adequate
to conduct normal  operations,  and with respect to such of the foregoing  which
are operated by the Borrower or any of its  Material  Subsidiaries,  in a manner
consistent  with the  Borrower's or its Material  Subsidiaries'  past  practices
(other  than those the  failure of which to  maintain  in  accordance  with this
Section 7.18 could not reasonably be expect to have a Material Adverse Effect).

     Section 7.19 Gas Imbalances,  Prepayments. As of the date hereof, except as
                  ----------------------------
set forth on Schedule 7.19 or on the most recent certificate  delivered pursuant
to Section 8.12(c),  on a net basis there are no gas imbalances,  take or pay or
other  prepayments  which  would  require the  Borrower  or any of its  Material
Subsidiaries to deliver Hydrocarbons produced from the Oil and Gas Properties at
some future time  without then or  thereafter  receiving  full payment  therefor
exceeding  three  million  mcf  of  gas  (on an  mcf  equivalent  basis)  in the
aggregate.

     Section 7.20 Marketing of Production.  Except for  contracts  listed and in
                  -----------------------
effect on the date hereof on Schedule 7.20, and thereafter  either  disclosed in
writing to the  Administrative  Agent or included in the most recently delivered
Reserve Report (with respect to all of which  contracts the Borrower  represents
that it or its Material  Subsidiaries  are receiving a price for all  production
sold thereunder which is computed  substantially in accordance with the terms of
the relevant  contract  and are not having  deliveries  curtailed  substantially
below the subject Property's  delivery  capacity),  no material agreements exist
which are not cancelable on 60 days notice or less without  penalty or detriment
for the sale of production  from the  Borrower's  or its Material  Subsidiaries'
Hydrocarbons  (including,  without  limitation,  calls  on or  other  rights  to
purchase,  production,  whether or not the same are currently  being  exercised)
that (a)  pertain  to the sale of  production  at a fixed  price  and (b) have a
maturity or expiry date of longer than six (6) months from the date hereof.

                                       53



     Section 7.21 Swap  Agreements.  Schedule  7.21, as of the date hereof,  and
                  ----------------
after the date  hereof,  each report  required to be  delivered  by the Borrower
pursuant to Section  8.01(d),  sets forth,  a true and complete list of all Swap
Agreements  of the Borrower and each  Material  Subsidiary,  the material  terms
thereof (including the type, term, effective date, termination date and notional
amounts or volumes),  the net mark to market value  thereof,  all credit support
agreements  relating thereto (including any margin required or supplied) and the
counterparty to each such agreement.

     Section 7.22 Use of Loans and Letters of Credit.  The proceeds of the Loans
                  ----------------------------------
and the  Letters of Credit  shall be used (a) to  provide  working  capital  for
exploration,   development  and  production  operations,   (b)  to  finance  the
acquisition of Oil & Gas  Properties,  (c) to renew,  rearrange,  modify and
extend  the Debt  under  the  Existing  Credit  Agreement,  and (d) for  general
corporate   purposes.   The  Borrower  and  its  Subsidiaries  are  not  engaged
principally,  or as one of its or their important activities, in the business of
extending credit for the purpose, whether immediate,  incidental or ultimate, of
buying or carrying  margin stock (within the meaning of Regulation U or X of the
Board). No part of the proceeds of any Loan or Letter of Credit will be used for
any purpose which violates the provisions of Regulations U or X of the Board.

     Section 7.23 Solvency. After giving effect to the transactions contemplated
                  --------
hereby,  (a) the  aggregate  assets  (after  giving effect to amounts that could
reasonably be received by reason of indemnity,  offset, insurance or any similar
arrangement),  at a fair valuation, of the Borrower and the Guarantors, taken as
a whole,  will exceed the aggregate Debt of the Borrower and the Guarantors on a
consolidated  basis, as the Debt becomes  absolute and matures,  (b) each of the
Borrower and the  Guarantors  will not have  incurred or intended to incur,  and
will not believe  that it will  incur,  Debt beyond its ability to pay such Debt
(after taking into account the timing and amounts of cash to be received by each
of the  Borrower  and the  Guarantors  and the  amounts  to be  payable on or in
respect of its  liabilities,  and giving effect to amounts that could reasonably
be  received  by  reason  of  indemnity,   offset,   insurance  or  any  similar
arrangement)  as such Debt  becomes  absolute  and  matures  and (c) each of the
Borrower  and the  Guarantors  will not have (and will have no reason to believe
that it will have thereafter)  unreasonably small capital for the conduct of its
business.

     Section 7.24 Material  Agreements.  The Borrower has delivered or caused to
                  --------------------
be delivered to the Administrative Agent true and correct copies of the Material
Agreements. The Material Agreements have not been modified, terminated, assigned
or pledged by Borrower or any Material  Subsidiary,  as applicable,  are in full
force  and  effect  and  no  party  is in  default  in  the  performance  of its
obligations thereunder in any material respect.

                                  ARTICLE VIII
                              Affirmative Covenants

     Until the Commitments  have expired or been terminated and the principal of
and interest on each Loan and all fees payable  hereunder  and all other amounts
payable under the Loan Documents shall have been paid in full and all Letters of
Credit shall have expired or terminated and all LC Disbursements shall have been
reimbursed, the Borrower covenants and agrees with the Lenders that:

                                       54



     Section 8.01 Financial Statements;  Ratings Change; Other Information.  The
                  --------------------------------------------------------
Borrower will furnish to the Administrative Agent and each Lender:

              (a) Annual Financial  Statements.  Within 90 days after the end of
                  ----------------------------
each fiscal year of the  Borrower,  its audited  consolidated  balance sheet and
related statements of operations,  stockholders' equity and cash flows as of the
end of and for such year,  setting  forth in each case in  comparative  form the
figures for the previous  fiscal year, all reported on by Deloitte &  Touche
or other independent public accountants of recognized national standing (without
a  "going  concern"  or  like   qualification   or  exception  and  without  any
qualification  or  exception  as to the scope of such  audit) to the effect that
such consolidated  financial  statements present fairly in all material respects
the  financial  condition  and results of  operations  of the  Borrower  and its
Consolidated  Subsidiaries  on a  consolidated  basis in  accordance  with  GAAP
consistently applied.

              (b) Quarterly Financial  Statements.  Within 45 days after the end
                  -------------------------------
of each of the first three fiscal  quarters of each fiscal year of the Borrower,
its   consolidated   balance  sheet  and  related   statements  of   operations,
stockholders' equity and cash flows as of the end of and for such fiscal quarter
and the then elapsed  portion of the fiscal year,  setting forth in each case in
comparative form the figures for the corresponding  period or periods of (or, in
the case of the balance sheet,  as of the end of) the previous  fiscal year, all
certified by one of its Financial  Officers as presenting fairly in all material
respects the  financial  condition and results of operations of the Borrower and
its  Consolidated  Subsidiaries on a consolidated  basis in accordance with GAAP
consistently  applied,  subject to normal  year-end  audit  adjustments  and the
absence of footnotes.

              (c) Certificate of Financial  Officer -- Compliance.  Concurrently
                  -----------------------------------------------
with any  delivery of  financial  statements  under  Section  8.01(a) or Section
8.01(b),  a  certificate  of a Financial  Officer in  substantially  the form of
Exhibit B hereto (i)  certifying  as to whether a Default has occurred and, if a
Default has  occurred,  specifying  the details  thereof and any action taken or
proposed  to be taken  with  respect  thereto,  (ii)  setting  forth  reasonably
detailed calculations  demonstrating compliance with Section 8.13(b) and Section
9.01 and (iii) stating whether any change in GAAP or in the application  thereof
has occurred since the date of the audited financial  statements  referred to in
Section 7.04 and, if any such change has occurred, specifying the effect of such
change on the financial statements accompanying such certificate.

              (d) Listing of Swap Agreements.  Concurrently with any delivery of
                  --------------------------
financial  statements  under  Section  8.01(a) and Section  8.01(b),  a true and
complete  list  of  all  Swap  Agreements  of the  Borrower  and  each  Material
Subsidiary  as of the last  Business Day of such fiscal  quarter or fiscal year,
which  shall  depict the  material  terms  thereof  (including  the type,  term,
effective  date,  termination  date and notional  amounts or  volumes),  the net
mark-to-market  value  therefor,  any new  credit  support  agreements  relating
thereto not listed on Schedule 7.20,  any margin  required or supplied under any
credit support document, and the counterparty to each such agreement.

              (e) Certificate  of Insurer -- Insurance  Coverage.   Concurrently
                  ----------------------------------------------
with any delivery of financial  statements under Section 8.01(a),  a certificate
of insurance  coverage from each insurer with respect to the insurance  required
by Section 8.07, in form and substance satisfactory to the Administrative Agent,

                                       55



and, if requested by the  Administrative  Agent or any Lender, all copies of the
applicable policies.

              (f) Other Accounting  Reports.  Promptly upon receipt  thereof,  a
                  -------------------------
copy of each other  report or letter  submitted  to the  Borrower  or any of its
Subsidiaries by independent  accountants in connection with any annual,  interim
or  special  audit  made  by them  of the  books  of the  Borrower  or any  such
Subsidiary,  and a copy of any response by the Borrower or any such  Subsidiary,
or the Board of Directors of the Borrower or any such Subsidiary, to such letter
or report.

              (g) SEC and Other Filings; Reports to Shareholders. Promptly after
                  ----------------------------------------------
the same become  publicly  available,  copies of all periodic and other reports,
proxy  statements  and other  materials  filed by the Borrower or any Subsidiary
with the SEC, or with any national  securities  exchange,  or distributed by the
Borrower to its shareholders generally, as the case may be.

              (h) Notices  Under  Material  Instruments.    Promptly  after  the
                  -------------------------------------
furnishing  thereof,  copies  of  any  financial  statement,  report  or  notice
furnished  to or by any  Person  pursuant  to the terms of any  preferred  stock
designation,  indenture,  loan or credit or other similar agreement,  other than
this  Agreement  and not  otherwise  required  to be  furnished  to the  Lenders
pursuant to any other provision of this Section 8.01.

              (i) Lists of Purchasers.  Promptly  following the written  request
                  -------------------
from  the  Administrative  Agent  thereof,  a  list  of all  Persons  purchasing
Hydrocarbons from the Borrower or any Material Subsidiary.

              (j) Notice of Sales of Oil and Gas  Properties.  In  the event the
                  ------------------------------------------
Borrower  or any  Material  Subsidiary  intends  to sell,  transfer,  assign  or
otherwise  dispose of any Oil or Gas  Properties or any Equity  Interests in any
Subsidiary  in  accordance  with  Section  9.13 for  consideration  in excess of
$5,000,000,  prior written notice of such disposition, the price thereof and the
anticipated date of closing.

              (k) Notice of Casualty Events.  Prompt written notice,  and in any
                  -------------------------
event within three Business Days, of the occurrence of any Casualty Event or the
commencement  of any action or proceeding  that could  reasonably be expected to
result in a Casualty Event.

              (l) Issuance  of  Permitted  Refinancing  Debt.   In the event the
                  ------------------------------------------
Borrower   intends  to  refinance  any  Debt  with  the  proceeds  of  Permitted
Refinancing Debt, prior written notice of such intended offering  therefor,  the
amount  thereof and the  anticipated  date of closing and will furnish a copy of
the preliminary  offering  memorandum (if any) and the final offering memorandum
(if any).

              (m) Information Regarding Borrower and Guarantors.  Prompt written
                  ---------------------------------------------
notice (and in any event within thirty (30) days upon becoming aware thereof) of
any change (i) in the Borrower or any Guarantor's corporate name or in any trade
name used to  identify  such  Person in the  conduct of its  business  or in the
ownership  of its  Properties,  (ii)  in the  location  of the  Borrower  or any
Guarantor's chief executive office or principal place of business,  (iii) in the
Borrower  or  any  Guarantor's   identity  or  corporate  structure  or  in  the
jurisdiction  in which  such  Person  is  incorporated  or  formed,  (iv) in the
Borrower  or any  Guarantor's  jurisdiction  of  organization  or such  Person's

                                       56



organizational  identification number in such jurisdiction of organization,  and
(v) in the Borrower or any Guarantor's federal taxpayer identification number.

              (n) Other Requested  Information.  Promptly  following any request
                  ----------------------------
therefor, such other information regarding the operations,  business affairs and
financial  condition  of the  Borrower  or any  Subsidiary  (including,  without
limitation,  any Plan or Multiemployer Plan and any reports or other information
required  to be  filed  under  ERISA),  or  compliance  with  the  terms of this
Agreement or any other Loan Document,  as the Administrative Agent or any Lender
may reasonably request.

     Section 8.02 Notices of Material  Events.  The Borrower will furnish to the
                  ---------------------------
Administrative Agent and each Lender prompt written notice of the following:

(a) the occurrence of any Default;

(b) the filing or commencement of any action, suit or proceeding by or before
any arbitrator or Governmental Authority against or affecting the Borrower or
any Affiliate thereof that, if adversely determined, could reasonably be
expected to result in a Material Adverse Effect;

(c) the occurrence of any ERISA Event that, alone or together with any other
ERISA Events that have occurred, could reasonably be expected to result in
liability of the Borrower and its Subsidiaries in an aggregate amount exceeding
$2,000,000; and

(d) any other development that results in, or could reasonably be expected to
result in, a Material Adverse Effect.

Each  notice  delivered  under  this  Section  8.02  shall be  accompanied  by a
statement of a  Responsible  Officer  setting  forth the details of the event or
development  requiring  such notice and any action taken or proposed to be taken
with respect thereto.

     Section 8.03 Existence;  Conduct of Business.  The  Borrower will, and will
                  -------------------------------
cause each Material  Subsidiary to, do or cause to be done all things  necessary
to preserve, renew and keep in full force and effect its legal existence and the
rights, licenses,  permits, privileges and franchises material to the conduct of
its business and maintain,  if necessary,  its  qualification  to do business in
each other  jurisdiction  in which its Oil and Gas  Properties is located or the
ownership  of its  Properties  requires  such  qualification,  except  where the
failure  to so  qualify  could not  reasonably  be  expected  to have a Material
Adverse  Effect;  provided  that the  foregoing  shall not  prohibit any merger,
consolidation, liquidation or dissolution permitted under Section 9.12.

     Section 8.04 Payment of Obligations. The Borrower will, and will cause each
                  ----------------------
Material  Subsidiary to, pay its  obligations,  including Tax liabilities of the
Borrower and all of its Subsidiaries  before the same shall become delinquent or
in default,  except where (a) the validity or amount thereof is being  contested
in good faith by  appropriate  proceedings,  (b) the  Borrower or such  Material
Subsidiary has set aside on its books adequate  reserves with respect thereto in
accordance  with GAAP and (c) the failure to make  payment  pending such contest
could not  reasonably  be  expected  to result in a Material  Adverse  Effect or
result in the seizure or levy of any Property of the Borrower or any Subsidiary.

                                       57



     Section 8.05 Performance of Obligations under Loan Documents.  The Borrower
                  -----------------------------------------------
will pay the Notes according to the reading,  tenor and effect thereof,  and the
Borrower  will and will cause each  Material  Subsidiary to do and perform every
act and discharge all of the  obligations to be performed and discharged by them
under the Loan Documents,  including, without limitation, this Agreement, at the
time or times and in the manner specified.

     Section 8.06 Operation and  Maintenance  of Properties.  Except for matters
                  -----------------------------------------
that could not  reasonably be expected to result in a Material  Adverse  Effect,
the Borrower, at its own expense,  will, and will cause each Material Subsidiary
to:

              (a) operate  its  Oil  and   Gas  Properties  and  other  material
Properties or cause such Oil and Gas Properties and other material Properties to
be operated in a careful and efficient  manner in accordance  with the practices
of the industry and in compliance  with all applicable  contracts and agreements
and  in  compliance  with  all  Governmental  Requirements,  including,  without
limitation,  applicable pro ration  requirements and Environmental Laws, and all
applicable  laws,  rules and regulations of every other  Governmental  Authority
from time to time  constituted to regulate the  development and operation of its
Oil and Gas Properties and the  production  and sale of  Hydrocarbons  and other
minerals therefrom,  except, in each case, where the failure to comply could not
reasonably be expected to have a Material Adverse Effect.

              (b) keep and maintain all Property  material to the conduct of its
business in good working order and  condition,  ordinary wear and tear excepted,
preserve,  maintain  and  keep in good  repair,  working  order  and  efficiency
(ordinary wear and tear excepted) all of its material Oil and Gas Properties and
other  material  Properties,   including,  without  limitation,  all  equipment,
machinery and facilities.

              (c) promptly pay and discharge,  or make  reasonable and customary
efforts  to cause to be paid  and  discharged,  all  delay  rentals,  royalties,
expenses  and  indebtedness  accruing  under  the  leases  or  other  agreements
affecting  or  pertaining  to its Oil and Gas  Properties  and will do all other
things  necessary  to keep  unimpaired  their  rights with  respect  thereto and
prevent any forfeiture thereof or default thereunder.

              (d) promptly  perform or make reasonable and customary  efforts to
cause to be performed,  in accordance with industry  standards,  the obligations
required  by  each  and  all  of the  assignments,  deeds,  leases,  sub-leases,
contracts and  agreements  affecting its interests in its Oil and Gas Properties
and other material Properties.

              (e) operate  its  Oil  and   Gas  Properties  and  other  material
Properties or cause or make  reasonable and customary  efforts to cause such Oil
and Gas Properties  and other  material  Properties to be operated in accordance
with  the  practices  of  the  industry  and in  material  compliance  with  all
applicable  contracts and agreements and in compliance in all material  respects
with all Governmental Requirements.

              (f) to the extent the Borrower or a Material Subsidiary is not the
operator of any Property, the Borrower shall use reasonable efforts to cause the
operator to comply with this Section 8.06.

                                       58



     Section 8.07 Insurance.  The  Borrower  will,  and will cause each Material
                  ---------
Subsidiary  to,  maintain,   with  financially  sound  and  reputable  insurance
companies,  insurance in such amounts and against such risks as are  customarily
maintained by companies engaged in the same or similar  businesses  operating in
the same or similar locations.

     Section 8.08 Books and Records;  Inspection  Rights. The Borrower will, and
                  --------------------------------------
will cause each Material  Subsidiary to, keep proper books of record and account
in  which  full,  true  and  correct  entries  are  made  of  all  dealings  and
transactions in relation to its business and activities.  The Borrower will, and
will cause each Material Subsidiary to, permit any representatives designated by
the Administrative  Agent or any Lender,  upon reasonable prior notice, to visit
and inspect its  Properties,  to examine  and make  extracts  from its books and
records,  and to discuss its affairs,  finances and condition  with its officers
and  independent  accountants,  all at such  reasonable  times  and as  often as
reasonably requested.

     Section 8.09 Compliance  with  Laws. The Borrower will, and will cause each
                  ----------------------
Material  Subsidiary to, comply with all laws, rules,  regulations and orders of
any Governmental  Authority  applicable to it or its Property,  except where the
failure to do so,  individually  or in the  aggregate,  could not  reasonably be
expected to result in a Material Adverse Effect.

     Section 8.10 Environmental Matters.
                  ---------------------

              (a) The Borrower shall at its sole expense:  (i) comply, and shall
cause its Properties and  operations and each  Subsidiary and each  Subsidiary's
Properties and operations to comply, with all applicable Environmental Laws, the
breach of which could be reasonably  expected to have a Material Adverse Effect;
(ii) not dispose of or otherwise release, and shall cause each Subsidiary not to
dispose  of or  otherwise  release,  any  oil,  oil  and  gas  waste,  hazardous
substance,  or solid waste on, under, about or from any of the Borrower's or its
Subsidiaries'  Properties  or any other  Property  to the  extent  caused by the
Borrower's or any of its  Subsidiaries'  operations  except in  compliance  with
applicable Environmental Laws, the disposal or release of which could reasonably
be expected to have a Material Adverse Effect;  (iii) timely obtain or file, and
shall cause each  Subsidiary  to timely  obtain or file,  all notices,  permits,
licenses, exemptions, approvals,  registrations or other authorizations, if any,
required  under  applicable  Environmental  Laws  to be  obtained  or  filed  in
connection  with the  operation or use of the  Borrower's  or its  Subsidiaries'
Properties, which failure to obtain or file could reasonably be expected to have
a Material Adverse Effect;  (iv) promptly  commence and diligently  prosecute to
completion,  and shall cause each Subsidiary to promptly commence and diligently
prosecute to completion, any assessment, evaluation, investigation,  monitoring,
containment,  cleanup,  removal,  repair,  restoration,   remediation  or  other
remedial  obligations  (collectively,  the  "Remedial  Work")  in the  event any
                                             --------------
Remedial Work is required or reasonably necessary under applicable Environmental
Laws because of or in connection with the actual or suspected  past,  present or
future  disposal  or other  release  of any oil,  oil and gas  waste,  hazardous
substance or solid waste on, under,  about or from any of the  Borrower's or its
Subsidiaries' Properties,  which failure to commence and diligently prosecute to
completion could  reasonably be expected to have a Material Adverse Effect;  and
(v) establish and  implement,  and shall cause each  Subsidiary to establish and
implement,  such  procedures as may be necessary to  continuously  determine and

                                       59



assure that the Borrower's and its Subsidiaries'  obligations under this Section
8.10(a) are timely and fully satisfied, which failure to establish and implement
could reasonably be expected to have a Material Adverse Effect.

              (b) The Borrower  will  promptly,  but in no event later than five
days of the occurrence of a triggering event,  notify the  Administrative  Agent
and the Lenders in writing of any threatened action, investigation or inquiry by
any Governmental  Authority or any threatened demand or lawsuit by any landowner
or  other  third  party  against  the  Borrower  or its  Subsidiaries  or  their
Properties  of  which  the  Borrower  has  knowledge  in  connection   with  any
Environmental  Laws  (excluding  routine  testing and corrective  action) if the
Borrower  reasonably  anticipates  that such  action  will  result in  liability
(whether  individually  or in the  aggregate)  in excess of $500,000,  not fully
covered by insurance, subject to normal deductibles.

              (c) In  connection  with any  future  acquisitions  of Oil and Gas
Properties or other Properties, the Borrower will and will cause each Subsidiary
to provide environmental audits and tests in accordance with American Society of
Testing  Materials  standards upon request by the  Administrative  Agent and the
Lenders,  except in  circumstances  in which the Borrower or any  Subsidiary  is
acquiring an additional interest in an Oil and Gas Property or other Property.

     Section 8.11 Further Assurances.
                  ------------------

              (a) The Borrower at its expense will, and will cause each Material
Subsidiary to, promptly execute and deliver to the Administrative Agent all such
other  documents,   agreements  and  instruments  reasonably  requested  by  the
Administrative  Agent  to  comply  with,  cure any  defects  or  accomplish  the
conditions  precedent,  covenants and agreements of the Borrower or any Material
Subsidiary,  as the case may be, in the Loan Documents,  including the Notes, or
to further evidence and more fully describe the collateral  intended as security
for the  Indebtedness,  or to correct any  omissions  in this  Agreement  or the
Security Instruments, or to state more fully the obligations secured therein, or
to perfect,  protect or preserve any Liens created pursuant to this Agreement or
any of the  Security  Instruments  or  the  priority  thereof,  or to  make  any
recordings,  file any notices or obtain any  consents,  all as may be reasonably
necessary or  appropriate,  in the reasonable  discretion of the  Administrative
Agent, in connection therewith.

              (b) The Borrower  hereby  authorizes the  Administrative  Agent to
file one or more financing or continuation  statements,  and amendments thereto,
relative to all or any part of the Mortgaged  Property  without the signature of
the  Borrower  or any  Material  Subsidiary  where  permitted  by law. A carbon,
photographic or other reproduction of the Security  Instruments or any financing
statement  covering  the  Mortgaged  Property  or  any  part  thereof  shall  be
sufficient as a financing  statement where permitted by law. The  Administrative
Agent will promptly send the Borrower any financing or  continuation  statements
it files  without the  signature of the Borrower or any other  Guarantor and the
Administrative  Agent will promptly send the Borrower the filing or  recordation
information with respect thereto.

                                       60



     Section 8.12 Reserve Reports.
                  ---------------

              (a) On or before  February 28th (or February  29th, as applicable)
and August 31st of each year,  commencing  August 31. 2005,  the Borrower  shall
furnish  to the  Administrative  Agent and the  Lenders a  Reserve  Report.  The
Reserve  Report as of December 31 of each year shall have the  majority of PV-10
value prepared or audited by one or more Approved Petroleum  Engineers,  and the
Reserve  Report as of June 30 of each  year  shall be  prepared  by or under the
supervision  of the Manager of Reservoir  Engineering  of the Borrower who shall
certify such Reserve Report to be true and accurate and to have been prepared in
accordance  with the procedures used in the  immediately  preceding  December 31
Reserve Report.

              (b) In the event of an Interim Redetermination, the Borrower shall
furnish to the Administrative Agent and the Lenders a Reserve Report prepared by
or under the supervision of the Manager of Reservoir Engineering of the Borrower
who shall  certify such Reserve  Report to be true and accurate and to have been
prepared in accordance  with the procedures  used in the  immediately  preceding
December 31 Reserve  Report.  For any Interim  Redetermination  requested by the
Administrative  Agent or the Borrower pursuant to Section 2.07(b),  the Borrower
shall  provide  such  Reserve  Report  with an "as of" date as  required  by the
Administrative Agent as soon as possible,  but in any event no later than thirty
(30) days following the receipt of such request.

              (c) With the delivery of each Reserve  Report,  the Borrower shall
provide  to the  Administrative  Agent  and the  Lenders  a  certificate  from a
Responsible   Officer  certifying  that  in  all  material  respects:   (i)  the
information  contained in the Reserve Report and any other information delivered
in connection  therewith is true and correct,  (ii) the Borrower or its Material
Subsidiaries  owns  good  and  defensible  title  to the Oil and Gas  Properties
evaluated  in such  Reserve  Report  and such  Properties  are free of all Liens
except for Liens  permitted  by Section  9.03,  (iii)  except as set forth on an
exhibit to the certificate,  on a net basis there are no gas imbalances, take or
pay or other  prepayments in excess of the volume specified in Section 7.19 with
respect to its Oil and Gas  Properties  evaluated in such  Reserve  Report which
would require the Borrower or any Material  Subsidiary  to deliver  Hydrocarbons
either  generally or produced  from such Oil and Gas  Properties  at some future
time without then or thereafter  receiving full payment  therefor,  (iv) none of
their Oil and Gas Properties have been sold since the date of the last Borrowing
Base determination  except as set forth on an exhibit to the certificate,  which
certificate shall list all of its Oil and Gas Properties sold and in such detail
as  reasonably  required  by  the  Administrative  Agent,  (v)  attached  to the
certificate is a list of all marketing agreements entered into subsequent to the
later of the date hereof or the most recently delivered Reserve Report which the
Borrower could reasonably be expected to have been obligated to list on Schedule
7.20 had such agreement  been in effect on the date hereof and attached  thereto
is a schedule of the Oil and Gas  Properties  evaluated by such  Reserve  Report
that are Mortgaged  Properties and demonstrating the percentage of the Borrowing
Base that the value of such Mortgaged Properties represent.

                                       61



     Section 8.13 Title Information.
                  -----------------

              (a) On or before the delivery to the Administrative  Agent and the
Lenders of each Reserve Report  required by Section  8.12(a),  the Borrower will
deliver title information in form and substance acceptable to the Administrative
Agent covering  enough of the Oil and Gas  Properties  evaluated by such Reserve
Report that were not included in the immediately  preceding  Reserve Report,  so
that  the   Administrative   Agent  shall  have  received  together  with  title
information previously delivered to the Administrative Agent, satisfactory title
information  on at least  70% of the total  value of the Oil and Gas  Properties
evaluated by such Reserve Report.

              (b) If the Borrower has provided title  information for additional
Properties under Section 8.13(a),  the Borrower shall,  within 60 days of notice
from the  Administrative  Agent that  title  defects  or  exceptions  exist with
respect to such additional Properties, either (i) cure any such title defects or
exceptions  (including  defects  or  exceptions  as to  priority)  which are not
permitted by Section 9.03 raised by such information, (ii) substitute acceptable
Mortgaged  Properties  with no title defects or  exceptions  except for Excepted
Liens (other than Excepted  Liens  described in clauses (e), (g) and (h) of such
definition)  having an equivalent  value or (iii) deliver title  information  in
form  and  substance   acceptable  to  the  Administrative  Agent  so  that  the
Administrative  Agent  shall have  received,  together  with  title  information
previously delivered to the Administrative Agent, satisfactory title information
on at least 70% of the  value of the Oil and Gas  Properties  evaluated  by such
Reserve Report.

              (c) If the Borrower is unable to cure any title  defect  requested
by the Administrative  Agent or the Lenders to be cured within the 60-day period
or the  Borrower  does not comply with the  requirements  to provide  acceptable
title  information  covering  70% of the  value  of the Oil  and Gas  Properties
evaluated  in the most  recent  Reserve  Report,  such  default  shall  not be a
Default,  but instead the Administrative Agent and/or the Majority Lenders shall
have the right to exercise the following  remedy in their sole  discretion  from
time to time,  and any failure to so exercise  this remedy at any time shall not
be a waiver as to future exercise of the remedy by the  Administrative  Agent or
the Lenders. To the extent that the Administrative Agent or the Majority Lenders
are not satisfied  with title to any Mortgaged  Property after the 60-day period
has elapsed,  such unacceptable  Mortgaged  Property shall not count towards the
70% requirement,  and the Administrative Agent may send a notice to the Borrower
and the Lenders that the then outstanding  Borrowing Base shall be reduced by an
amount as  determined  by the  Majority  Lenders to cause the  Borrower to be in
compliance with the requirement to provide  acceptable title  information on 70%
of the value of the Oil and Gas Properties. This new Borrowing Base shall become
effective immediately after receipt of such notice.

     Section 8.14 Additional Collateral; Additional Guarantors.
                  --------------------------------------------

              (a) In connection with each redetermination of the Borrowing Base,
the Borrower shall review the Reserve  Report and the list of current  Mortgaged
Properties  (as  described  in Section  8.12(c)(vi))  to  ascertain  whether the
Mortgaged  Properties  represent  at least 70% of the total value of the Oil and
Gas  Properties  evaluated in the most recently  completed  Reserve Report after
giving  effect  to   exploration   and  production   activities,   acquisitions,
dispositions and production.  In the event that the Mortgaged  Properties do not
represent at least 70% of such total value,  then the Borrower shall,  and shall
cause  its  Material  Subsidiaries  to,  grant  to the  Administrative  Agent as

                                       62



security for the  Indebtedness a first-priority  Lien interest  (subject only to
Excepted  Liens  of the  type  described  in  clauses  (a) to (d) and (f) of the
definition  thereof,  but subject to the provisos at the end of such definition)
on  additional  Oil and Gas  Properties  not  already  subject  to a Lien of the
Security  Instruments  such that after  giving  effect  thereto,  the  Mortgaged
Properties will represent at least 70% of such total value.  All such Liens will
be created and  perfected by and in accordance  with the  provisions of deeds of
trust,   security   agreements  and  financing   statements  or  other  Security
Instruments,   all  in  form  and  substance  reasonably   satisfactory  to  the
Administrative   Agent  and  in  sufficient  executed  (and  acknowledged  where
necessary or  appropriate)  counterparts  for  recording  purposes.  In order to
comply with the foregoing,  if any Material  Subsidiary places a Lien on its Oil
and Gas  Properties  and such Material  Subsidiary  is not a Guarantor,  then it
shall become a Guarantor and comply with Section 8.14(b).

              (b) In the event that any Subsidiary becomes a Material Subsidiary
after the Closing Date, the Borrower  shall  promptly  cause such  Subsidiary to
guarantee the  Indebtedness  pursuant to the Guaranty  Agreement.  In connection
with any such guaranty,  the Borrower  shall, or shall cause such Subsidiary to,
A. execute and deliver a supplement to the Guaranty  Agreement  executed by such
Subsidiary,  B.  pledge  all of the  Equity  Interests  of such  new  Subsidiary
(including,   without  limitation,   delivery  of  original  stock  certificates
evidencing the Equity Interests of such Subsidiary, together with an appropriate
undated  stock  powers  for  each  certificate  duly  executed  in  blank by the
registered  owner  thereof)  and C.  execute and deliver  such other  additional
closing  documents,  certificates  and legal  opinions  as shall  reasonably  be
requested by the Administrative Agent.

     Section 8.15 ERISA Compliance.  The Borrower will promptly furnish and will
                  ----------------
cause the  Subsidiaries  and any ERISA  Affiliate  to  promptly  furnish  to the
Administrative  Agent (i)  promptly  after the  filing  thereof  with the United
States Secretary of Labor,  the Internal Revenue Service or the PBGC,  copies of
each  annual and other  report  with  respect to each Plan or any trust  created
thereunder,  (ii) immediately upon becoming aware of the occurrence of any ERISA
Event or of any "prohibited  transaction,"  as described in section 406 of ERISA
or in section 4975 of the Code, in connection with any Plan or any trust created
thereunder,  a written notice signed by the President or the principal Financial
Officer,  the Subsidiary or the ERISA Affiliate,  as the case may be, specifying
the nature  thereof,  what  action the  Borrower,  the  Subsidiary  or the ERISA
Affiliate is taking or proposes to take with respect  thereto,  and, when known,
any action taken or proposed by the Internal Revenue Service,  the Department of
Labor or the PBGC with  respect  thereto,  and (iii)  immediately  upon  receipt
thereof,  copies of any notice of the PBGC's intention to terminate or to have a
trustee  appointed to administer any Plan. With respect to each Plan (other than
a  Multiemployer  Plan),  the Borrower will, and will cause each  Subsidiary and
ERISA  Affiliate  to,  (i)  satisfy  in full  and in a  timely  manner,  without
incurring any late payment or underpayment  charge or penalty and without giving
rise to any lien, all of the  contribution  and funding  requirements of section
412 of the Code (determined  without regard to subsections (d), (e), (f) and (k)
thereof) and of section 302 of ERISA (determined without regard to sections 303,
304 and 306 of  ERISA),  and (ii)  pay,  or  cause to be paid,  to the PBGC in a
timely  manner,  without  incurring any late payment or  underpayment  charge or
penalty, all premiums required pursuant to sections 4006 and 4007 of ERISA.

                                       63



     Section 8.16 Performance of Material Agreements.  The Borrower will perform
                  ----------------------------------
and observe,  and cause each Material  Subsidiary to perform and observe, in all
material respects each of the provisions of the Material  Agreements to which it
is a party on its part to be  performed  or  observed  prior to the  termination
thereof.

                                   ARTICLE IX
                               Negative Covenants

         Until the Commitments have expired or terminated and the principal of
and interest on each Loan and all fees payable hereunder and all other amounts
payable under the Loan Documents have been paid in full and all Letters of
Credit have expired or terminated and all LC Disbursements shall have been
reimbursed, the Borrower covenants and agrees with the Lenders that:

     Section 9.01 Financial Covenants.
                  -------------------

              (a) Ratio of Total Debt to EBITDA.  The Borrower  will not, at any
                  -----------------------------
time,  permit  its ratio of Total  Debt as of such  time to EBITDA  for the four
fiscal  quarters  ending  on the  last  day of the  fiscal  quarter  immediately
preceding the date of determination for which financial statements are available
to be greater than 3.5 to 1.0.

              (b) Current  Ratio.  The Borrower will not permit,  as of the last
                  --------------
day of  any  fiscal  quarter,  its  ratio  of (i)  consolidated  current  assets
(including  the unused  amount of the total  Commitments)  to (ii)  consolidated
current  liabilities  (excluding  non-cash  obligations  under  FAS  133 and the
current portion of the Aggregate Commitment) to be less than 1.0 to 1.0.

     Section 9.02 Debt.  Neither the Borrower nor any Material  Subsidiary  will
                  ----
incur, create, assume or suffer to exist any Debt, except:

              (a) the  Notes  or  other  Indebtedness  arising  under  the  Loan
Documents or any guaranty of or  suretyship  arrangement  for the Notes or other
Indebtedness arising under the Loan Documents.

              (b) Debt of the Borrower and its Material Subsidiaries existing on
the date hereof that is reflected in the Financial Statements, and any Permitted
Refinancing Debt in respect thereof.

              (c) accounts payable (for the deferred  purchase price of Property
or services) from time to time incurred in the ordinary course of business which
are not greater than sixty (60) days past the date of invoice or  delinquent  or
which are being  contested  in good  faith by  appropriate  action and for which
adequate reserves have been maintained in accordance with GAAP.

              (d) Debt under Capital Leases not to exceed $5,000,000.

              (e) Debt associated with bonds or surety  obligations  required by
Governmental  Requirements  in connection  with the operation of the Oil and Gas
Properties.

                                       64



              (f)  intercompany  Debt  between  the  Borrower  and any  Material
Subsidiary or between  Material  Subsidiaries to the extent permitted by Section
9.05(g); provided that such Debt is not held, assigned, transferred,  negotiated
or pledged to any Person  other  than the  Borrower  or one of its  Wholly-Owned
Subsidiaries,  and,  provided  further,  that any such Debt  owed by either  the
Borrower or a Guarantor shall be  subordinated to the  Indebtedness on terms set
forth in the Guaranty Agreement.

              (g)  endorsements of negotiable  instruments for collection in the
ordinary course of business.

              (h)  non-recourse  Debt secured by Property other than Oil and Gas
Properties  evaluated by the Lenders for purposes of establishing  the Borrowing
Base not to exceed $10,000,000 in the aggregate at any one time outstanding.

              (i) other Debt not to exceed  $5,000,000  in the  aggregate at any
one time outstanding.

     Section 9.03 Liens.  Neither the Borrower nor any Material  Subsidiary will
                  -----
create,  incur, assume or permit to exist any Lien on any of its Properties (now
owned or hereafter acquired), except:

              (a) Liens securing the payment of any Indebtedness.

              (b) Excepted Liens.

              (c) Liens securing Capital Leases permitted by Section 9.02(d) but
only on the Property under lease.

              (d) Liens  securing any Permitted  Refinancing  Debt provided that
any  such  Permitted  Refinancing  Debt  is not  secured  by any  additional  or
different Property not securing the Refinanced Debt.

              (e) Liens on Property  securing  non-recourse  Debt  permitted  by
Section 9.02(h).

     Section 9.04 Dividends,  Distributions  and Redemptions.  The Borrower will
                  ------------------------------------------
not, and will not permit any of its  Subsidiaries  to, declare or make, or agree
to pay or make,  directly or  indirectly,  any  Restricted  Payment,  return any
capital to its  stockholders  or make any  distribution  of its  Property to its
Equity Interest  holders,  except (a) the Borrower may declare and pay dividends
with respect to its Equity Interests  payable solely in additional shares of its
common stock (other than Disqualified Capital Stock), (b) so long as no Event of
Default shall have occurred  which is  continuing,  the Borrower may declare and
pay annual  cash  dividends  not to exceed  $0.25 per common  share on an annual
basis, (c)  Subsidiaries  may declare and pay dividends  ratably with respect to
their  Equity  Interests,  and (d) the  Borrower  may make  Restricted  Payments
pursuant to and in accordance with restricted stock plans, stock option plans or
other  benefit  plans  for  management  or  employees  of the  Borrower  and its
Subsidiaries.

                                       65



     Section 9.05 Investments,  Loans and Advances. Neither the Borrower nor any
                  --------------------------------
Material Subsidiary will make or permit to remain outstanding any Investments in
or to any Person, except that the foregoing restriction shall not apply to:

              (a) Investments reflected in the Financial Statements or which are
disclosed to the Lenders in Schedule 9.05(a).

              (b)  accounts   receivable  arising  in  the  ordinary  course  of
business.

              (c) direct obligations of the United States or any agency thereof,
or obligations  guaranteed by the United States or any agency  thereof,  in each
case maturing within one year from the date of creation thereof.

              (d)  commercial  paper  maturing  within one year from the date of
creation thereof rated in the highest grade by S&P or Moody's.

              (e)  deposits  maturing  within one year from the date of creation
thereof with,  including  certificates  of deposit  issued by, any Lender or any
office  located in the United States of any other bank or trust company which is
organized under the laws of the United States or any state thereof, has capital,
surplus and undivided profits  aggregating at least $100,000,000 (as of the date
of such bank or trust company's most recent  financial  reports) and has a short
term deposit  rating of no lower than A2 or P2, as such rating is set forth from
time to time, by S&P or Moody's, respectively or, in the case of any Foreign
Subsidiary,  a bank organized in a jurisdiction in which the Foreign  Subsidiary
conducts  operations  having assets in excess of $500,000,000 (or its equivalent
in another currency).

              (f)  deposits  in money  market  funds  investing  exclusively  in
Investments described in Section 9.05(c), Section 9.05(d) or Section 9.05(e).

              (g)  Investments i. made by the Borrower in or to the  Guarantors,
and ii. made by a Guarantor in or to the Borrower or any other Guarantor.

              (h) subject to the limits in Section 9.07, Investments (including,
without limitation, capital contributions) in general or limited partnerships or
other types of entities  (each a  "venture")  entered  into by the Borrower or a
                                   -------
Material  Subsidiary  with others in the ordinary  course of business;  provided
that i. any such  venture is  engaged  exclusively  in oil and gas  exploration,
development,   production,   processing   and  related   activities,   including
transportation,  except for  existing  Investments  described  or referred to on
Schedule 9.05(h) and Investments  permitted by Section 9.05(i), ii. the interest
in such venture is acquired in the  ordinary  course of business and on fair and
reasonable  terms  and  iii.  such  venture   interests   acquired  and  capital
contributions  made  (valued as of the date such  interest  was  acquired or the
contribution  made) do not exceed,  in the aggregate at any time  outstanding an
amount equal to $10,000,000.

              (i) subject to the limits in Section 9.07, additional  Investments
(including, without limitation, capital contributions) in the ventures described
or referred  to on Schedule  9.05(h)  and new  Investments  (including,  without
limitation, capital contributions) in ventures entered into by the Borrower or a
Material  Subsidiary  with others in the ordinary  course of business;  provided
that i. any such venture is not engaged  exclusively in oil and gas exploration,

                                       66



development,   production,   processing   and  related   activities,   including
transportation,  ii. the  interest in such  venture is acquired in the  ordinary
course  of  business  and on fair and  reasonable  terms and iii.  such  venture
interests  acquired and capital  contributions  made (valued as of the date such
interest was acquired or the contribution  made) do not exceed, in the aggregate
at any time outstanding an amount equal to $10,000,000.

              (j) subject to the limits in Section 9.07,  Investments  in direct
ownership  interests in  additional  Oil and Gas  Properties  and gas  gathering
systems related thereto or related to farm-out,  farm-in, joint operating, joint
venture or area of mutual interest agreements,  gathering systems,  pipelines or
other  similar  arrangements  which are usual and  customary  in the oil and gas
exploration and production business located within the geographic  boundaries of
the United States of America.

              (k) so long as no Event of Default  shall have  occurred  which is
continuing, from and after the date hereof, the Borrower may make repurchases of
its stock; provided, however, during any time the Borrower's ratio of Total Debt
           --------  -------
to  consolidated  tangible net worth is greater than 2.50 to 1.00, the aggregate
amount paid by the Borrower in connection with such repurchases shall not exceed
$50,000,000.

     Section 9.06 Designation of Material Subsidiaries. Unless designated as a
                  ------------------------------------
Non-Material Subsidiary on Schedule 7.15 as of the date hereof or thereafter,
assuming compliance with Section 9.16, any Person that becomes a Subsidiary of
the Borrower or any of its Material Subsidiaries shall be classified as a
Material Subsidiary.

     Section 9.07 Nature of  Business;  International  Operations.  Neither  the
                  -----------------------------------------------
Borrower nor any Material  Subsidiary  will allow any material change to be made
in the character of its business as an independent  oil and gas  exploration and
production  company.  From and  after  the date  hereof,  the  Borrower  and its
Subsidiaries  will not  acquire  or make any  other  expenditure  (whether  such
expenditure  is capital,  operating or  otherwise) in or related to, any Oil and
Gas  Properties  not located  within the  geographical  boundaries of the United
States or Canada in excess of $10,000,000 in the aggregate.

     Section 9.08 Limitation  on Leases.   Neither the Borrower nor any Material
                  ---------------------
Subsidiary will create,  incur, assume or suffer to exist any obligation for the
payment of rent or hire of Property of any kind whatsoever (real or personal but
excluding Capital Leases and leases of Hydrocarbon  Interests),  under leases or
lease  agreements which would cause the aggregate amount of all payments made by
the Borrower and the Material  Subsidiaries pursuant to all such leases or lease
agreements,  including,  without limitation, any residual payments at the end of
any lease,  to exceed  $3,000,000 in any period of twelve  consecutive  calendar
months during the life of such leases.

     Section 9.09 Proceeds of Notes.   The Borrower will not permit the proceeds
                  -----------------
of the Notes to be used for any purpose  other than those  permitted  by Section
7.22.  Neither the Borrower nor any Person  acting on behalf of the Borrower has
taken or will take any action  which  might cause any of the Loan  Documents  to
violate  Regulations  U or X or any other  regulation of the Board or to violate
Section  7 of the  Securities  Exchange  Act of 1934 or any  rule or  regulation
thereunder,  in each case as now in effect or as the same may  hereinafter be in

                                       67



effect. If requested by the  Administrative  Agent, the Borrower will furnish to
the Administrative  Agent and each Lender a statement to the foregoing effect in
conformity  with the  requirements of FR Form U-1 or such other form referred to
in Regulation U or Regulation X of the Board, as the case may be.

     Section 9.10 ERISA  Compliance.  The Borrower and the Subsidiaries will not
                  -----------------
at any time:

              (a) engage in, or  permit  any ERISA  Affiliate  to engage in, any
transaction  in connection  with which the  Borrower,  a Subsidiary or any ERISA
Affiliate  could be subjected  to either a civil  penalty  assessed  pursuant to
subsections  (c), (i) or (l) of section 502 of ERISA or a tax imposed by Chapter
43 of Subtitle D of the Code.

              (b) terminate,  or  permit any ERISA  Affiliate to terminate,  any
Plan in a manner, or take any other action with respect to any Plan, which could
result in any liability of the Borrower,  a Subsidiary or any ERISA Affiliate to
the PBGC.

              (c) fail to make,  or permit any ERISA  Affiliate to fail to make,
full payment when due of all amounts  which,  under the  provisions of any Plan,
agreement relating thereto or applicable law, the Borrower,  a Subsidiary or any
ERISA Affiliate is required to pay as contributions thereto.

              (d) permit to exist,  or  allow any ERISA  Affiliate  to permit to
exist, any accumulated  funding  deficiency within the meaning of section 302 of
ERISA or section  412 of the Code,  whether or not waived,  with  respect to any
Plan.

              (e) permit, or allow any ERISA Affiliate to permit,  the actuarial
present  value of the  benefit  liabilities  under  any Plan  maintained  by the
Borrower,  a Subsidiary or any ERISA Affiliate which is regulated under Title IV
of  ERISA  to  exceed  the  current  value  of the  assets  (computed  on a plan
termination  basis in accordance  with Title IV of ERISA) of such Plan allocable
to such benefit  liabilities.  The term "actuarial  present value of the benefit
liabilities" shall have the meaning specified in section 4041 of ERISA.

              (f) contribute to or assume  an  obligation  to contribute  to, or
permit  any  ERISA  Affiliate  to  contribute  to or  assume  an  obligation  to
contribute to, any Multiemployer Plan.

              (g) acquire, or permit any ERISA Affiliate to acquire, an interest
in any Person that causes such Person to become an ERISA  Affiliate with respect
to the  Borrower or a Subsidiary  or with respect to any ERISA  Affiliate of the
Borrower or a Subsidiary if such Person  sponsors,  maintains or contributes to,
or at any time in the six-year period  preceding such acquisition has sponsored,
maintained,  or contributed to, 1. any Multiemployer  Plan, or 2. any other Plan
that is subject to Title IV of ERISA under which the actuarial  present value of
the benefit  liabilities under such Plan exceeds the current value of the assets
(computed on a plan  termination  basis in accordance with Title IV of ERISA) of
such Plan allocable to such benefit liabilities.

                                       68



              (h) incur,  or permit any ERISA Affiliate to incur, a liability to
or on account of a Plan under sections 515, 4062,  4063,  4064,  4201 or 4204 of
ERISA.

              (i) contribute  to or assume an  obligation  to contribute  to, or
permit  any  ERISA  Affiliate  to  contribute  to or  assume  an  obligation  to
contribute to, any employee  welfare benefit plan, as defined in section 3(1) of
ERISA,  including,  without  limitation,  any such plan  maintained  to  provide
benefits to former  employees of such  entities,  that may not be  terminated by
such  entities  in their  sole  discretion  at any  time  without  any  material
liability.

              (j) amend,  or  permit   any  ERISA  Affiliate  to  amend,  a Plan
resulting  in an  increase  in  current  liability  such  that the  Borrower,  a
Subsidiary or any ERISA  Affiliate is required to provide  security to such Plan
under section 401(a)(29) of the Code.

     Section 9.11 Sale or  Discount  of  Receivables.   Except  for  receivables
                  ----------------------------------
obtained by the Borrower or any Material  Subsidiary out of the ordinary  course
of business or the settlement of joint interest billing accounts in the ordinary
course of  business  or  discounts  granted  to settle  collection  of  accounts
receivable or the sale of defaulted  accounts  arising in the ordinary course of
business in connection  with the  compromise  or  collection  thereof and not in
connection with any financing transaction, neither the Borrower nor any Material
Subsidiary  will  discount or sell (with or without  recourse)  any of its notes
receivable or accounts receivable.

     Section 9.12 Mergers, Etc. Neither the Borrower nor any Material Subsidiary
                  ------------
will merge into or with or consolidate with any other Person,  or sell, lease or
otherwise dispose of (whether in one transaction or in a series of transactions)
all  or  substantially  all of  its  Property  to any  other  Person  (any  such
transaction, a "consolidation"); provided that
                -------------

              (a) the Borrower or any Material  Subsidiary may  participate in a
consolidation with any other Person; provided that (i) no Default is continuing,
(ii) any such consolidation  would not cause a Default  hereunder,  (iii) if the
Borrower  consolidates  with any Person,  the  Borrower  shall be the  surviving
Person, (iv) if any Material Subsidiary consolidates with any Person (other than
the Borrower or a Material  Subsidiary) and such Material  Subsidiary is not the
surviving  Person,  such surviving  Person shall expressly assume in writing (in
form and substance  satisfactory to the Administrative Agent) all obligations of
such Material  Subsidiary  under the Loan  Documents and (v) the Borrowing  Base
will be  redetermined  using the  procedures for an Interim  Redetermination  in
accordance with Section 2.07; and

              (b) any Material  Subsidiary may  participate  in a  consolidation
with the  Borrower  (provided  that the  Borrower  shall  be the  continuing  or
surviving  corporation)  or any  other  Material  Subsidiary  and if one of such
Material  Subsidiaries is a Wholly-Owned  Subsidiary,  then the surviving Person
shall be a Wholly-Owned Subsidiary.

     Section 9.13 Sale of Properties. The Borrower will not, and will not permit
                  ------------------
any Material Subsidiary to, sell, assign, farm-out, convey or otherwise transfer
any Property  except for (a) the sale of  Hydrocarbons in the ordinary course of
business; (b) farmouts of undeveloped acreage and assignments in connection with
such farmouts; (c) the sale or transfer of equipment that is no longer necessary
for the business of the Borrower or such  Material  Subsidiary or is replaced by
equipment of at least comparable value and use; (d) the sale,  transfer or other

                                       69



disposition of Equity  Interests in  non-Material  Subsidiaries;  sales or other
dispositions  of Oil and Gas  Properties  or any  interest  therein or  Material
Subsidiaries  owning Oil and Gas Properties;  provided that (i) if such sales or
other dispositions of Oil and Gas Properties or Material Subsidiaries owning Oil
and Gas Properties included in the most recently delivered Reserve Report during
any period between two  successive  Scheduled  Redetermination  Dates has a fair
market value in excess of  $10,000,000,  individually  or in the aggregate,  the
Borrowing  Base  shall be  reduced,  effective  immediately  upon  such  sale or
disposition,  by an amount equal to the value, if any, assigned such Property in
the most recently  delivered  Reserve  Report and (ii) if any such sale or other
disposition is of a Material Subsidiary owning Oil and Gas Properties, such sale
or other  disposition  shall  include all the Equity  Interests of such Material
Subsidiary;  and (f) sales and other dispositions of Properties not regulated by
Section  9.13(a) to (e)  having a fair  market  value not to exceed  $10,000,000
during any 12-month period.

     Section 9.14 Environmental  Matters.  Neither the Borrower nor any Material
                  ----------------------
Subsidiary will cause or permit any of its Property to be in violation of, or do
anything or permit  anything to be done which will subject any such  Property to
any Remedial  Work under any  Environmental  Laws,  assuming  disclosure  to the
applicable   Governmental  Authority  of  all  relevant  facts,  conditions  and
circumstances,  if any,  pertaining  to such Property  where such  violations or
remedial  obligations  could  reasonably be expected to have a Material  Adverse
Effect.

     Section 9.15 Transactions  with  Affiliates.  Neither  the Borrower nor any
                  ------------------------------
Material  Subsidiary  will  enter  into  any  transaction,   including,  without
limitation,  any purchase,  sale, lease or exchange of Property or the rendering
of any service,  with any Affiliate  (other than the Guarantors and Wholly-Owned
Subsidiaries of the Borrower) unless such  transactions are otherwise  permitted
under this Agreement and are upon fair and reasonable terms no less favorable to
it than it would obtain in a comparable  arm's length  transaction with a Person
not an Affiliate.

     Section 9.16 Subsidiaries. The Borrower shall not, and shall not permit any
                  ------------
Material  Subsidiary to, create or acquire any additional Material Subsidiary or
redesignate  a Subsidiary  as a Material  Subsidiary  unless the Borrower  gives
written notice to the  Administrative  Agent of such creation or acquisition and
complies with Section 8.14(b).  The Borrower shall not, and shall not permit any
Material  Subsidiary  to,  sell,  assign  or  otherwise  dispose  of any  Equity
Interests in any Material Subsidiary except in compliance with Section 9.13(e).

     Section 9.17 Negative Pledge Agreements; Dividend Restrictions. Neither the
                  -------------------------------------------------
Borrower nor any Material  Subsidiary  will create,  incur,  assume or suffer to
exist any contract,  agreement or understanding (other than this Agreement,  the
Security  Instruments  or Capital  Leases  creating  Liens  permitted by Section
9.03(c))  which in any way  prohibits  or  restricts  the  granting,  conveying,
creation  or  imposition  of any  Lien on any of its  Property  in  favor of the
Administrative  Agent and the Lenders or restricts any Material  Subsidiary from
paying dividends or making  distributions  to the Borrower or any Guarantor,  or
which  requires  the  consent  of or  notice  to  other  Persons  in  connection
therewith.

     Section 9.18 Gas Imbalances, Take-or-Pay or Other Prepayments. The Borrower
                  ------------------------------------------------
will not allow (on a net basis) gas imbalances, take-or-pay or other prepayments
with  respect to the Oil and Gas  Properties  of the  Borrower  or any  Material

                                       70



Subsidiary  that would  require the  Borrower  or such  Material  Subsidiary  to
deliver  Hydrocarbons  at some future time without then or thereafter  receiving
full payment  therefor to exceed three million mcf of gas (on an mcfe equivalent
basis) in the aggregate.

     Section 9.19 Swap  Agreements.  Neither   the   Borrower  nor any  Material
                  ----------------
Subsidiary  will enter into any Swap  Agreements  with any Person other than (a)
Swap Agreements in respect of commodities (i) with an Approved  Counterparty and
(ii) the notional  volumes for which (when  aggregated with other commodity Swap
Agreements then in effect) do not exceed,  as of the date such Swap Agreement is
executed,  75% of the reasonably  anticipated  projected production from proved,
developed,  producing  Oil and Gas  Properties  for each month during the period
during which such Swap Agreement is in effect,  (b) Swap Agreements  effectively
converting   interest  rates  from  floating  to  fixed  (i)  with  an  Approved
Counterparty  and (ii) the notional amounts of which (when aggregated with other
interest rate Swap Agreements  then in effect  effectively  converting  interest
rates from  floating  to fixed) do not exceed  100% of  principal  amount of the
Borrower's  floating rate Debt in respect of borrowed money, (c) Swap Agreements
effectively  converting  interest  rates  from  fixed  to  floating  (i) with an
Approved  Counterparty  and (ii) the notional  amounts of which (when aggregated
with other interest rate Swap Agreements then in effect  effectively  converting
interest rates from fixed to floating) do not exceed 100% of principal amount of
the Borrower's fixed rate Debt in respect of borrowed money (including,  without
limitation,  the  Borrower's  5.75%  Senior  Convertible  Notes),  and (d)  Swap
Agreements in respect of currencies (i) with an Approved Counterparty, (ii) such
transactions are to hedge actual or expected  fluctuations in currencies and are
not  for  speculative  purposes  and  (iii)  such  transactions  do not  involve
termination  or expiry  dates longer than six (6) months after the trade date in
respect thereof.  In no event shall any Swap Agreement  contain any requirement,
agreement  or covenant  for the  Borrower  or any  Material  Subsidiary  to post
collateral or margin to secure their obligations under such Swap Agreement or to
cover market  exposures  other than usual and customary  requirements to deliver
letters of credit or post cash collateral.

     Section 9.20 Preservation  of Material  Agreements.  Except for  acts which
                  -------------------------------------
could not reasonably be expected to have a Material  Adverse Effect or which are
taken in the ordinary course of business,  neither the Borrower nor any Material
Subsidiary,  as the  case may be,  will  agree to any  change,  modification  or
amendment to or waiver of any of the terms or  provisions of any of the Material
Agreements.  Neither the Borrower nor any Material  Subsidiary,  as the case may
be,  will take any action or permit any action to be taken by others  which will
release any Person from its obligations or liabilities under any of the Material
Agreements.

     Section 9.21 Release of Liens.   The  Borrower  shall  be entitled to cause
                  ----------------
Mortgaged  Properties  having  an  aggregate  fair  market  value  not to exceed
$15,000,000  to be released  from the Liens  created by and  existing  under the
Security  Instruments  without the consent of the Lenders;  provided that (a) no
                                                            -------- ----
Event of Default  shall have  occurred  which is  continuing,  (b) only one such
release may be made between Schedule Redeterminations of the Borrowing Base, (c)
following any such release,  the total value of the remaining Mortgaged Property
shall be sufficient  to support the Aggregate  Commitment in the sole opinion of
the Administrative Agent, and (d) following any such release, the Administrative
Agent shall  adjust the then  current  Borrowing  Base to take into  account the
release of such Mortgaged  Properties and any mandatory prepayment required as a
result thereof shall be made at the time of such release.

                                       71



                                   ARTICLE X
                           Events of Default; Remedies

     Section 10.01 Events of Default.  One or more of the following events shall
                   -----------------
constitute an "Event of Default":
               ----------------

              (a) the  Borrower  shall fail to pay any  principal of any Loan or
any  reimbursement  obligation in respect of any LC Disbursement when and as the
same shall become due and payable,  whether at the due date thereof or at a date
fixed for prepayment thereof or otherwise.

              (b) the Borrower shall fail to pay any interest on any Loan or any
fee or any other amount (other than an amount  referred to in Section  10.01(a))
payable  under any Loan  Document,  when and as the same  shall  become  due and
payable,  and such  failure  shall  continue  unremedied  for a period  of three
Business Days.

              (c) any  representation  or warranty  made or deemed made by or on
behalf of the Borrower or any Material  Subsidiary in or in connection  with any
Loan  Document or any amendment or  modification  of any Loan Document or waiver
under such Loan Document, or in any report, certificate,  financial statement or
other document  furnished pursuant to or in connection with any Loan Document or
any amendment or modification thereof or waiver thereunder,  shall prove to have
been incorrect in any respect material to the Borrower's  creditworthiness or to
the rights or interests of the Lenders when made or deemed made.

              (d) the Borrower or any Material  Subsidiary shall fail to observe
or perform any covenant,  condition or agreement contained in Section 8.03 or in
ARTICLE IX.

              (e) the Borrower or any Material  Subsidiary shall fail to observe
or perform any  covenant,  condition  or agreement  contained in this  Agreement
(other than those  specified in Section  10.01(a),  Section  10.01(b) or Section
10.01(d)) or any other Loan Document, and such failure shall continue unremedied
for a period of 30 days after the earlier to occur of A. notice thereof from the
Administrative  Agent to the Borrower (which notice will be given at the request
of any Lender) or B. a  Responsible  Officer of the  Borrower  or such  Material
Subsidiary otherwise becoming aware of such default.

              (f) the Borrower or any Material Subsidiary shall fail to make any
payment  (whether of principal or interest and  regardless of amount) in respect
of any Material Indebtedness,  when and as the same shall become due and payable
(subject to applicable grace periods), unless such payment is being contested in
good faith and by proper  proceedings  and against which  adequate  reserves are
being maintained.

              (g) any event or  condition  occurs that  results in any  Material
Indebtedness  becoming  due prior to its  scheduled  maturity or that enables or
permits  (with or without  the giving of notice,  the lapse of time or both) the
holder or holders of any Material Indebtedness or any trustee or agent on its or
their behalf to cause any Material Indebtedness to become due, or to require the
Redemption  thereof or any offer to Redeem to be made in respect thereof,  prior

                                       72



to its scheduled maturity or require the Borrower or any Material  Subsidiary to
make an offer in respect thereof; provided, however, early termination of a Swap
                                  --------  -------
Agreement  (that is Material  Indebtedness)  due solely to an ISDA  "Termination
Event" is not an Event of Default hereunder.

              (h) an involuntary proceeding shall be commenced or an involuntary
petition shall be filed seeking (i) liquidation,  reorganization or other relief
in respect of the  Borrower or any  Material  Subsidiary  or its debts,  or of a
substantial part of its assets, under any Federal,  state or foreign bankruptcy,
insolvency,  receivership  or similar law now or hereafter in effect or (ii) the
appointment  of a receiver,  trustee,  custodian,  sequestrator,  conservator or
similar  official  for  the  Borrower  or  any  Material  Subsidiary  or  for  a
substantial  part of its  assets,  and,  in any such case,  such  proceeding  or
petition shall continue  undismissed for 30 days or an order or decree approving
or ordering any of the foregoing shall be entered.

              (i) the Borrower or any Material  Subsidiary shall (i) voluntarily
commence any proceeding or file any petition seeking liquidation, reorganization
or other  relief  under any Federal,  state or foreign  bankruptcy,  insolvency,
receivership  or similar law now or  hereafter  in effect,  (ii)  consent to the
institution  of, or fail to  contest  in a timely and  appropriate  manner,  any
proceeding or petition described in Section 10.01(h), (iii) apply for or consent
to the appointment of a receiver, trustee, custodian, sequestrator,  conservator
or  similar  official  for the  Borrower  or any  Material  Subsidiary  or for a
substantial  part of its  assets,  (iv) file an answer  admitting  the  material
allegations  of a petition filed against it in any such  proceeding,  (v) make a
general  assignment for the benefit of creditors or (vi) take any action for the
purpose of effecting any of the foregoing.

              (j) the Borrower or any Material  Subsidiary  shall become unable,
admit in writing its inability or fail generally to pay its debts as they become
due.

              (k) one or more judgments for the payment of money in an aggregate
amount in excess of $1,000,000 (to the extent not covered by  independent  third
party  insurance  provided by insurers of the highest  claims  paying  rating or
financial  strength as to which the insurer does not dispute coverage and is not
subject to an insolvency proceeding) shall be rendered against the Borrower, any
Material  Subsidiary  or any  combination  thereof  and the  same  shall  remain
undischarged  for a period of 30 consecutive  days and for which execution shall
not be  effectively  stayed,  or any action shall be legally taken by a judgment
creditor  to attach or levy upon any  assets  of the  Borrower  or any  Material
Subsidiary to enforce any such judgment.

              (l) the  Loan  Documents  after  delivery  thereof  shall  for any
reason, except to the extent permitted by the terms thereof, cease to be in full
force and effect and valid,  binding and  enforceable  in accordance  with their
terms against the Borrower or a Guarantor  party  thereto,  or cease to create a
valid  and  perfected  Lien  of  the  priority  required  thereby  on any of the
collateral  purported to be covered  thereby,  except to the extent permitted by
the terms of this  Agreement,  or the Borrower or any  Guarantor or any of their
Affiliates shall so state in writing.

              (m) an ERISA Event shall have occurred that, in the opinion of the
Majority  Lenders,  when taken  together  with all other ERISA  Events that have
occurred, could reasonably be expected to result in a Material Adverse Effect.

              (n) a Change in Control shall occur.

                                       73



              (o) the Borrower  shall fail to pay any  mandatory  prepayment  or
provide additional collateral as provided in Section 3.04(c)

     Section 10.02 Remedies.
                   --------

              (a) In the case of an Event of Default other than one described in
Section 10.01(h),  Section 10.01(i) or Section 10.01(j),  at any time thereafter
during the continuance of such Event of Default,  the Administrative  Agent may,
and at the request of the Majority  Lenders,  shall,  by notice to the Borrower,
take either or both of the following  actions,  at the same or different  times:
(i) terminate the  Commitments,  and thereupon the  Commitments  shall terminate
immediately, and (ii) declare the Notes and the Loans then outstanding to be due
and payable in whole (or in part, in which case any principal not so declared to
be due and  payable may  thereafter  be  declared  to be due and  payable),  and
thereupon the principal of the Loans so declared to be due and payable, together
with accrued interest thereon and all fees and other obligations of the Borrower
and the  Guarantors  accrued  hereunder  and under the Notes and the other  Loan
Documents  (including,  without  limitation,  the payment of cash  collateral to
secure the LC Exposure as provided  in Section  2.08(k)),  shall  become due and
payable immediately, without presentment, demand, protest or other notice of any
kind, all of which are hereby waived by the Borrower and each Guarantor;  and in
case of an Event of Default described in Section  10.01(h),  Section 10.01(i) or
Section 10.01(j),  the Commitments shall  automatically  terminate and the Notes
and the principal of the Loans then outstanding,  together with accrued interest
thereon  and  all  fees  and  the  other  obligations  of the  Borrower  and the
Guarantors  accrued  hereunder and under the Notes and the other Loan  Documents
(including,  without limitation, the payment of cash collateral to secure the LC
Exposure as provided in Section  2.08(k)),  shall  automatically  become due and
payable,  without presentment,  demand, protest or other notice of any kind, all
of which are hereby waived by the Borrower and each Guarantor.

              (b) In the case of the  occurrence  of an Event  of  Default,  the
Administrative  Agent and the Lenders  will have all other  rights and  remedies
available at law and equity.

              (c)  All  proceeds   realized  from  the   liquidation   or  other
disposition  of collateral or otherwise  received  after  maturity of the Notes,
whether by acceleration or otherwise,  shall be applied: first, to reimbursement
of expenses  and  indemnities  provided for in this  Agreement  and the Security
Instruments;  second, to accrued interest on the Notes;  third, to fees; fourth,
pari passu to (i)  Indebtedness  owing to a Lender or an  Affiliate  of a Lender
under  any Swap  Agreement  permitted  hereby  and  (ii)  pro rata to  principal
outstanding on the Notes; fifth, to any other  Indebtedness;  sixth, to serve as
cash  collateral  to be  held  by the  Administrative  Agent  to  secure  the LC
Exposure;  and any excess shall be paid to the Borrower or as otherwise required
by any Governmental Requirement.

                                   ARTICLE XI
                            The Administrative Agent

     Section 11.01 Appointment; Powers. Each of the Lenders and the Issuing Bank
                   -------------------
hereby irrevocably appoints the Administrative Agent as its agent and authorizes
the Administrative Agent to take such actions on its behalf and to exercise such
powers as are delegated to the Administrative  Agent by the terms hereof and the

                                       74



other Loan  Documents,  together with such actions and powers as are  reasonably
incidental thereto.

     Section 11.02 Duties   and   Obligations  of   Administrative   Agent.  The
                   -------------------------------------------------------
Administrative  Agent  shall not have any  duties or  obligations  except  those
expressly set forth in the Loan  Documents.  Without  limiting the generality of
the  foregoing,  (a)  the  Administrative  Agent  shall  not be  subject  to any
fiduciary or other implied duties,  regardless of whether a Default has occurred
and is continuing,  (b) the Administrative Agent shall not have any duty to take
any  discretionary  action  or  exercise  any  discretionary  powers,  except as
provided in Section  11.03,  and (c) except as expressly set forth  herein,  the
Administrative  Agent  shall  not have any duty to  disclose,  and  shall not be
liable for the failure to disclose,  any information relating to the Borrower or
any of its Subsidiaries  that is communicated to or obtained by the bank serving
as  Administrative  Agent  or  any  of  its  Affiliates  in  any  capacity.  The
Administrative Agent shall be deemed not to have knowledge of any Default unless
and until written  notice  thereof is given to the  Administrative  Agent by the
Borrower  or a  Lender,  and shall  not be  responsible  for or have any duty to
ascertain or inquire into (i) any statement,  warranty or representation made in
or in  connection  with this  Agreement  or any other  Loan  Document,  (ii) the
contents of any  certificate,  report or other document  delivered  hereunder or
under any other Loan Document or in connection herewith or therewith,  (iii) the
performance or observance of any of the covenants,  agreements or other terms or
conditions  set forth herein or in any other Loan  Document,  (iv) the validity,
enforceability,  effectiveness or genuineness of this Agreement,  any other Loan
Document or any other agreement, instrument or document, (v) the satisfaction of
any condition set forth in ARTICLE VI or elsewhere herein, other than to confirm
receipt of items expressly required to be delivered to the Administrative Agent,
(vi) the existence,  value, perfection or priority of any collateral security or
the  financial or other  condition of the Borrower and its  Subsidiaries  or any
other  obligor or  guarantor,  or (vii) any failure by the Borrower or any other
Person (other than itself) to perform any of its obligations  hereunder or under
any other Loan  Document or the  performance  or  observance  of any  covenants,
agreements or other terms or conditions set forth herein or therein.

     Section 11.03 Action by  Administrative  Agent.  The  Administrative  Agent
                   --------------------------------
shall  not have  any  duty to take any  discretionary  action  or  exercise  any
discretionary   powers,   except   discretionary  rights  and  powers  expressly
contemplated  hereby  that the  Administrative  Agent is required to exercise in
writing as directed by the Majority  Lenders (or such other number or percentage
of the  Lenders as shall be  necessary  under the  circumstances  as provided in
Section  12.02)  and in all  cases  the  Administrative  Agent  shall  be  fully
justified  in  failing  or  refusing  to act  hereunder  or under any other Loan
Documents  unless it shall (a) receive  written  instructions  from the Majority
Lenders or the Lenders,  as  applicable,  (or such other number or percentage of
the Lenders as shall be necessary under the circumstances as provided in Section
12.02)  specifying  the  action  to be  taken  and  (b)  be  indemnified  to its
satisfaction by the Lenders against any and all liability and expenses which may
be incurred by it by reason of taking or continuing to take any such action. The
instructions  as  aforesaid  and any action  taken or  failure  to act  pursuant
thereto by the Administrative Agent shall be binding on all of the Lenders. If a
Default has occurred and is continuing, then the Administrative Agent shall take
such action with respect to such  Default as shall be directed by the  requisite
Lenders in the written instructions (with indemnities) described in this Section
11.03,  provided  that,  unless and until the  Administrative  Agent  shall have
received  such  directions,  the  Administrative  Agent  may (but  shall  not be

                                       75



obligated to) take such action, or refrain from taking such action, with respect
to such Default as it shall deem advisable in the best interests of the Lenders.
In no event,  however,  shall the  Administrative  Agent be required to take any
action which exposes the Administrative  Agent to personal liability or which is
contrary  to  this  Agreement,   the  Loan  Documents  or  applicable  law.  The
Administrative Agent shall not be liable for any action taken or not taken by it
with the  consent or at the request of the  Majority  Lenders or the Lenders (or
such other number or percentage  of the Lenders as shall be necessary  under the
circumstances  as provided in Section 12.02),  and otherwise shall not be liable
for any  action  taken or not taken by it  hereunder  or under  any  other  Loan
Document or under any other  document or instrument  referred to or provided for
herein or therein or in  connection  herewith  or  therewith  INCLUDING  ITS OWN
ORDINARY NEGLIGENCE, except for its own gross negligence or willful misconduct.

     Section 11.04 Reliance by Administrative  Agent. The  Administrative  Agent
                   ---------------------------------
shall be entitled to rely upon,  and shall not incur any  liability  for relying
upon, any notice, request, certificate, consent, statement, instrument, document
or other writing believed by it to be genuine and to have been signed or sent by
the proper  Person.  The  Administrative  Agent also may rely upon any statement
made to it orally or by  telephone  and  believed by it to be made by the proper
Person,  and shall not incur any liability  for relying  thereon and each of the
Borrower,  the Lenders and the Issuing  Bank hereby  waives the right to dispute
the Administrative Agent's record of such statement, except in the case of gross
negligence or willful misconduct by the Administrative Agent. The Administrative
Agent may consult  with legal  counsel  (who may be counsel  for the  Borrower),
independent  accountants  and other  experts  selected  by it,  and shall not be
liable for any action taken or not taken by it in accordance  with the advice of
any such counsel,  accountants or experts. The Administrative Agent may deem and
treat the payee of any Note as the holder thereof for all purposes hereof unless
and until a written  notice of the  assignment  or  transfer  thereof  permitted
hereunder shall have been filed with the Administrative Agent.

     Section 11.05 Subagents.  The Administrative  Agent may perform any and all
                   ---------
its duties  and  exercise  its  rights and powers by or through  any one or more
sub-agents  appointed by the Administrative  Agent. The Administrative Agent and
any such  sub-agent  may perform any and all its duties and  exercise its rights
and powers through their respective Related Parties. The exculpatory  provisions
of the preceding  Sections of this ARTICLE XI shall apply to any such  sub-agent
and to the Related Parties of the  Administrative  Agent and any such sub-agent,
and  shall  apply  to  their  respective   activities  in  connection  with  the
syndication of the credit  facilities  provided for herein as well as activities
as Administrative Agent.

     Section 11.06 Resignation or Removal of Administrative  Agent.   Subject to
                   -----------------------------------------------
the appointment and acceptance of a successor  Administrative  Agent as provided
in this  Section  11.06,  the  Administrative  Agent  may  resign at any time by
notifying the Lenders, the Issuing Bank and the Borrower, and the Administrative
Agent may be removed at any time with or without cause by the Majority  Lenders.
Upon any such resignation or removal, the Majority Lenders shall have the right,
in consultation with the Borrower, to appoint a successor. If no successor shall
have been so  appointed  by the Majority  Lenders and shall have  accepted  such
appointment within 30 days after the retiring  Administrative Agent gives notice
of its  resignation or removal of the retiring  Administrative  Agent,  then the
retiring  Administrative  Agent may,  on behalf of the  Lenders  and the Issuing
Bank,  appoint a  successor  Administrative  Agent which shall be a bank with an

                                       76



office in New  York,  New  York,  or an  Affiliate  of any such  bank.  Upon the
acceptance of its appointment as Administrative  Agent hereunder by a successor,
such successor  shall succeed to and become vested with all the rights,  powers,
privileges  and duties of the retiring  Administrative  Agent,  and the retiring
Administrative  Agent  shall be  discharged  from  its  duties  and  obligations
hereunder.  The fees payable by the Borrower to a successor Administrative Agent
shall be the same as those payable to its predecessor  unless  otherwise  agreed
between  the  Borrower  and such  successor.  After the  Administrative  Agent's
resignation hereunder, the provisions of this ARTICLE XI and Section 12.03 shall
continue in effect for the benefit of such retiring  Administrative  Agent,  its
sub-agents and their respective  Related Parties in respect of any actions taken
or  omitted  to be taken by any of them  while it was  acting as  Administrative
Agent.

     Section  11.07  Administrative  Agent  as  Lenders.  Wachovia,  serving  as
                     ----------------------------------
Administrative  Agent  hereunder  shall  have the same  rights and powers in its
capacity as a Lender as any other  Lender and may exercise the same as though it
were not  Administrative  Agent,  and such bank and its  Affiliates  may  accept
deposits from,  lend money to and generally  engage in any kind of business with
the  Borrower or any  Subsidiary  or other  Affiliate  thereof as if it were not
Administrative Agent hereunder.

     Section 11.08 No  Reliance.   Each  Lender   acknowledges   that  it   has,
                   ------------
independently  and without reliance upon the  Administrative  Agent or any other
Lender and based on such documents and information as it has deemed appropriate,
made its own credit  analysis and decision to enter into this Agreement and each
other Loan Document to which it is a party.  Each Lender also  acknowledges that
it will, independently and without reliance upon the Administrative Agent or any
other Lender and based on such  documents and  information as it shall from time
to time deem  appropriate,  continue to make its own  decisions in taking or not
taking action under or based upon this Agreement,  any other Loan Document,  any
related  agreement  or any  document  furnished  hereunder  or  thereunder.  The
Administrative  Agent shall not be  required  to keep itself  informed as to the
performance  or  observance by the Borrower or any of its  Subsidiaries  of this
Agreement,  the Loan Documents or any other document referred to or provided for
herein  or  to  inspect  the   Properties  or  books  of  the  Borrower  or  its
Subsidiaries.  Except for notices,  reports and other  documents and information
expressly  required to be furnished to the Lenders by the  Administrative  Agent
hereunder  or  Arranger  shall have any duty or  responsibility  to provide  any
Lender with any credit or other  information  concerning the affairs,  financial
condition or business of the Borrower (or any of its Affiliates)  which may come
into the possession of the  Administrative  Agent or any of its  Affiliates.  In
this regard,  each Lender acknowledges that Vinson & Elkins L.L.P. is acting
in this transaction as special counsel to the Administrative  Agent only, except
to the  extent  otherwise  expressly  stated  in any legal  opinion  or any Loan
Document. Each other party hereto will consult with its own legal counsel to the
extent that it deems  necessary in  connection  with the Loan  Documents and the
matters contemplated therein.

     Section 11.09 Authority of Administrative  Agent to Release  Collateral and
                   -------------------------------------------------------------
Liens.Each  Lender and the Issuing  Bank hereby  authorizes  the  Administrative
- -----
Agent  to  release  any  collateral  that is  permitted  to be sold or  released
pursuant to the terms of the Loan  Documents.  Each Lender and the Issuing  Bank
hereby  authorizes  the  Administrative  Agent to  execute  and  deliver  to the
Borrower,  at the  Borrower's  sole cost and  expense,  any and all  releases of

                                       77



Liens,  termination  statements,   assignments  or  other  documents  reasonably
requested by the Borrower in connection  with any sale or other  disposition  of
Property to the extent such sale or other  disposition is permitted by the terms
of Section 9.13 or is otherwise authorized by the terms of the Loan Documents.

     Section 11.10 Syndication Agent and  Co-Documentation  Agents.  The Lenders
                   -----------------------------------------------
identified  in this  Agreement as  Syndication  Agent and as a  Co-Documentation
Agent shall not have any right, power, obligation, liability,  responsibility or
duty under this  Agreement  other than those  applicable to all Lenders as such.
Without limiting the foregoing,  the Syndication Agent and the  Co-Documentation
Agents  shall not have or be deemed to have a  fiduciary  relationship  with any
Lender.

                                  ARTICLE XII
                                  Miscellaneous

     Section 12.01 Notices.
                   -------

              (a)  Except  in the  case  of  notices  and  other  communications
expressly  permitted to be given by telephone (and subject to Section 12.01(b)),
all notices and other communications provided for herein shall be in writing and
shall be delivered by hand or overnight courier service,  mailed by certified or
registered mail or sent by telecopy, as follows:

                  (i) if to the Borrower,  to it at 1776 Lincoln  Street,  Suite
700,  Denver,  Colorado 80203,  Attention of David W.  Honeyfield  (Telecopy No.
303/861-0934);

                  (ii)  if to  the  Administrative  Agent,  to it at  201  South
College Street, 8th Floor NC 0680, Charlotte, North Carolina 28288, Attention of
Lisa VanNote (Telecopy No. 704/383-0288), with a copy to Wachovia Securities, at
1001 Fannin, Suite 2255, Houston,  Texas 77002-6709,  Attention of Jay Chernosky
(Telecopy No. 713/650-6354);

                  (iii)  if to the  Issuing  Bank,  to it at 201  South  College
Street, 8th Floor NC 0680,  Charlotte,  North Carolina 28288,  Attention of Lisa
VanNote (Telecopy No. 704/383-0288); and

                  (iv) if to any other Lender, to it at its address (or telecopy
number) set forth in its Administrative Questionnaire.

              (b) Notices and other  communications to the Lenders hereunder may
be delivered or furnished by  electronic  communications  pursuant to procedures
approved by the  Administrative  Agent;  provided that the  foregoing  shall not
apply to notices  pursuant to ARTICLE II, ARTICLE III,  ARTICLE IV and ARTICLE V
unless otherwise agreed by the  Administrative  Agent and the applicable Lender.
The Administrative Agent or the Borrower may, in its discretion, agree to accept
notices and other  communications  to it hereunder by electronic  communications
pursuant to procedures approved by it; provided that approval of such procedures
may be limited to particular notices or communications.

              (c) Any party hereto may change its address or telecopy number for
notices  and other  communications  hereunder  by  notice  to the other  parties
hereto.  All  notices  and other  communications  given to any  party  hereto in

                                       78



accordance  with the provisions of this  Agreement  shall be deemed to have been
given on the date of receipt.

     Section 12.02 Waivers; Amendments.
                   -------------------

              (a) No  failure  on the  part  of the  Administrative  Agent,  the
Issuing Bank or any Lender to exercise and no delay in exercising, and no course
of dealing with respect to, any right, power or privilege, or any abandonment or
discontinuance of steps to enforce such right, power or privilege,  under any of
the Loan Documents  shall operate as a waiver  thereof,  nor shall any single or
partial  exercise  of any  right,  power  or  privilege  under  any of the  Loan
Documents  preclude any other or further exercise thereof or the exercise of any
other right,  power or privilege.  The rights and remedies of the Administrative
Agent,  the  Issuing  Bank and the  Lenders  hereunder  and under the other Loan
Documents  are  cumulative  and are not exclusive of any rights or remedies that
they would  otherwise  have. No waiver of any provision of this Agreement or any
other Loan Document or consent to any departure by the Borrower  therefrom shall
in any  event be  effective  unless  the  same  shall be  permitted  by  Section
12.02(b),  and then  such  waiver  or  consent  shall be  effective  only in the
specific  instance  and for the purpose for which  given.  Without  limiting the
generality  of the  foregoing,  the making of a Loan or  issuance of a Letter of
Credit shall not be construed as a waiver of any Default,  regardless of whether
the Administrative  Agent, any Lender or the Issuing Bank may have had notice or
knowledge of such Default at the time.

              (b) Neither  this  Agreement  nor  any  provision  hereof  nor any
Security Instrument nor any provision thereof may be waived, amended or modified
except  pursuant to an agreement or  agreements  in writing  entered into by the
Borrower  and the Majority  Lenders or by the  Borrower  and the  Administrative
Agent with the consent of the Majority Lenders;  provided that no such agreement
shall (i) increase the  Commitment  or the Maximum  Credit  Amount of any Lender
without the written consent of such Lender,  (ii) increase the Borrowing Base or
modify Section 2.07,  without the written  consent of all of the Lenders,  (iii)
reduce the principal amount of any Loan or LC Disbursement or reduce the rate of
interest  thereon,  or reduce any fees  payable  hereunder,  or reduce any other
Indebtedness  hereunder  or under any other Loan  Document,  without the written
consent of each Lender  affected  thereby,  (iv) postpone the scheduled  date of
payment of the principal amount of any Loan or LC Disbursement,  or any interest
thereon, or any fees payable hereunder,  or any other Indebtedness  hereunder or
under any other Loan Document, or reduce the amount of, waive or excuse any such
payment,  or postpone or extend the Termination Date without the written consent
of each Lender affected  thereby,  (v) change Section 4.01(b) or Section 4.01(c)
in a manner that would alter the pro rata sharing of payments  required thereby,
without the written  consent of each Lender,  (vi) change the  definition of the
term "Material  Subsidiary",  without the written consent of each Lender,  (vii)
release any Guarantor (except as set forth in the Guaranty  Agreement),  release
all or substantially  all of the collateral,  or reduce the percentage set forth
in Section 8.14 to less than 70%, without the written consent of each Lender, or
(viii) change any of the  provisions of this Section  12.02(b) or the definition
of "Majority  Lenders" or any other  provision  hereof  specifying the number or
percentage of Lenders required to waive, amend or modify any rights hereunder or
under any other Loan  Documents or make any  determination  or grant any consent
hereunder  or any other Loan  Documents,  without  the  written  consent of each
Lender; provided further that no such agreement shall amend, modify or otherwise
affect  the rights or duties of the  Administrative  Agent or the  Issuing  Bank

                                       79



hereunder or under any other Loan Document  without the prior written consent of
the   Administrative   Agent  or  the  Issuing   Bank,   as  the  case  may  be.
Notwithstanding  the foregoing,  any supplement to Schedule 7.15  (Subsidiaries)
shall  be  effective  simply  by  delivering  to  the  Administrative   Agent  a
supplemental   schedule   clearly   marked  as  such  and,  upon  receipt,   the
Administrative Agent will promptly deliver a copy thereof to the Lenders.

     Section 12.03 Expenses, Indemnity; Damage Waiver.
                   ----------------------------------

              (a) The  Borrower  shall  pay (i)  all  reasonable   out-of-pocket
expenses  incurred by the  Administrative  Agent and its Affiliates,  including,
without  limitation,  the reasonable fees,  charges and disbursements of counsel
and other outside  consultants  for the  Administrative  Agent,  the  reasonable
travel, photocopy,  mailing, courier,  telephone and other similar expenses, and
the cost of environmental audits and surveys and appraisals,  in connection with
the syndication of the credit facilities  provided for herein,  the preparation,
negotiation,  execution,  delivery and administration (both before and after the
execution hereof and including advice of counsel to the Administrative  Agent as
to the  rights  and  duties of the  Administrative  Agent and the  Lenders  with
respect  thereto)  of  this  Agreement  and the  other  Loan  Documents  and any
amendments,  modifications  or waivers of or consents  related to the provisions
hereof  or  thereof  (whether  or not the  transactions  contemplated  hereby or
thereby shall be consummated),  (ii) all costs, expenses, Taxes, assessments and
other charges incurred by the  Administrative  Agent or any Lender in connection
with any filing, registration,  recording or perfection of any security interest
contemplated by this Agreement or any Security  Instrument or any other document
referred to therein, (iii) all reasonable out-of-pocket expenses incurred by the
Issuing Bank in connection with the issuance, amendment, renewal or extension of
any  Letter  of  Credit  or  any  demand  for  payment   thereunder,   (iv)  all
out-of-pocket expenses incurred by the Administrative Agent, the Issuing Bank or
any Lender,  including the reasonable  fees,  charges and  disbursements  of any
counsel  for the  Administrative  Agent,  the  Issuing  Bank or any  Lender,  in
connection  with the  enforcement or protection of its rights in connection with
this  Agreement  or any other Loan  Document,  including  its rights  under this
Section 12.03,  or in connection with the Loans made or Letters of Credit issued
hereunder,  including,  without  limitation,  all  such  out-of-pocket  expenses
incurred  during any workout,  restructuring  or negotiations in respect of such
Loans or Letters of Credit.

              (b) THE BORROWER SHALL  INDEMNIFY THE  ADMINISTRATIVE  AGENT,  THE
ISSUING BANK AND EACH LENDER,  AND EACH  RELATED  PARTY OF ANY OF THE  FOREGOING
PERSONS (EACH SUCH PERSON BEING CALLED AN "INDEMNITEE")  AGAINST,  AND HOLD EACH
INDEMNITEE HARMLESS FROM, ANY AND ALL LOSSES, CLAIMS,  DAMAGES,  LIABILITIES AND
RELATED  EXPENSES,  INCLUDING THE REASONABLE FEES,  CHARGES AND DISBURSEMENTS OF
ANY COUNSEL FOR ANY INDEMNITEE,  INCURRED BY OR ASSERTED  AGAINST ANY INDEMNITEE
DIRECTLY ARISING OUT OF, DIRECTLY IN CONNECTION WITH, OR DIRECTLY AS A RESULT OF
(i) THE  EXECUTION OR DELIVERY OF THIS  AGREEMENT OR ANY OTHER LOAN  DOCUMENT OR
ANY AGREEMENT OR INSTRUMENT  CONTEMPLATED HEREBY OR THEREBY,  THE PERFORMANCE BY
THE PARTIES HERETO OR THE PARTIES TO ANY OTHER LOAN DOCUMENT OF THEIR RESPECTIVE
OBLIGATIONS  HEREUNDER OR THEREUNDER  OR THE  CONSUMMATION  OF THE  TRANSACTIONS

                                       80



CONTEMPLATED  HEREBY OR BY ANY OTHER  LOAN  DOCUMENT,  (ii) THE  FAILURE  OF THE
BORROWER  OR ANY  RESTRICTED  SUBSIDIARY  TO  COMPLY  WITH THE TERMS OF ANY LOAN
DOCUMENT, INCLUDING THIS AGREEMENT, OR WITH ANY GOVERNMENTAL REQUIREMENT,  (iii)
ANY INACCURACY OF ANY  REPRESENTATION  OR ANY BREACH OF ANY WARRANTY OR COVENANT
OF THE BORROWER OR ANY GUARANTOR  SET FORTH IN ANY OF THE LOAN  DOCUMENTS OR ANY
INSTRUMENTS, DOCUMENTS OR CERTIFICATIONS DELIVERED IN CONNECTION THEREWITH, (iv)
ANY LOAN OR LETTER OF CREDIT OR THE USE OF THE  PROCEEDS  THEREFROM,  INCLUDING,
WITHOUT  LIMITATION,  A. ANY REFUSAL BY THE  ISSUING  BANK TO HONOR A DEMAND FOR
PAYMENT UNDER A LETTER OF CREDIT IF THE DOCUMENTS  PRESENTED IN CONNECTION  WITH
SUCH DEMAND DO NOT STRICTLY  COMPLY WITH THE TERMS OF SUCH LETTER OF CREDIT,  OR
B. THE  PAYMENT  OF A DRAWING  UNDER ANY  LETTER OF CREDIT  NOTWITHSTANDING  THE
NON-COMPLIANCE,  NON-DELIVERY  OR OTHER IMPROPER  PRESENTATION  OF THE DOCUMENTS
PRESENTED IN CONNECTION  THEREWITH,  (v) ANY OTHER ASPECT OF THE LOAN DOCUMENTS,
(vi) THE OPERATIONS OF THE BUSINESS OF THE BORROWER AND ITS  SUBSIDIARIES BY THE
BORROWER AND ITS  SUBSIDIARIES,  (vii) ANY  ASSERTION  THAT THE LENDERS WERE NOT
ENTITLED TO RECEIVE THE PROCEEDS RECEIVED PURSUANT TO THE SECURITY  INSTRUMENTS,
(viii) ANY ENVIRONMENTAL LAW APPLICABLE TO THE BORROWER OR ANY SUBSIDIARY OR ANY
OF THEIR PROPERTIES,  INCLUDING WITHOUT  LIMITATION,  THE PRESENCE,  GENERATION,
STORAGE, RELEASE, THREATENED RELEASE, USE, TRANSPORT,  DISPOSAL,  ARRANGEMENT OF
DISPOSAL OR  TREATMENT  OF OIL,  OIL AND GAS WASTES,  SOLID  WASTES OR HAZARDOUS
SUBSTANCES ON ANY OF THEIR PROPERTIES,  (ix) THE BREACH OR NON-COMPLIANCE BY THE
BORROWER OR ANY SUBSIDIARY WITH ANY ENVIRONMENTAL LAW APPLICABLE TO THE BORROWER
OR ANY  SUBSIDIARY,  (x) THE PAST OWNERSHIP BY THE BORROWER OR ANY SUBSIDIARY OF
ANY OF THEIR  PROPERTIES  OR PAST  ACTIVITY  ON ANY OF THEIR  PROPERTIES  WHICH,
THOUGH  LAWFUL  AND FULLY  PERMISSIBLE  AT THE  TIME,  COULD  RESULT IN  PRESENT
LIABILITY,  (xi) THE  PRESENCE,  USE,  RELEASE,  STORAGE,  TREATMENT,  DISPOSAL,
GENERATION,   THREATENED  RELEASE,  TRANSPORT,   ARRANGEMENT  FOR  TRANSPORT  OR
ARRANGEMENT  FOR DISPOSAL OF OIL, OIL AND GAS WASTES,  SOLID WASTES OR HAZARDOUS
SUBSTANCES ON OR AT ANY OF THE  PROPERTIES  OWNED OR OPERATED BY THE BORROWER OR
ANY  SUBSIDIARY  OR ANY ACTUAL OR  ALLEGED  PRESENCE  OR  RELEASE  OF  HAZARDOUS
MATERIALS  ON OR FROM ANY  PROPERTY  OWNED OR OPERATED BY THE BORROWER OR ANY OF
ITS SUBSIDIARIES,  (xii) ANY  ENVIRONMENTAL  LIABILITY RELATED IN ANY WAY TO THE
BORROWER OR ANY OF ITS SUBSIDIARIES,  OR (xiii) ANY OTHER ENVIRONMENTAL,  HEALTH
OR SAFETY  CONDITION IN CONNECTION WITH THE LOAN DOCUMENTS,  OR (xiv) ANY ACTUAL
OR PROSPECTIVE CLAIM, LITIGATION, INVESTIGATION OR PROCEEDING RELATING TO ANY OF
THE  FOREGOING,  WHETHER  BASED  ON  CONTRACT,  TORT  OR ANY  OTHER  THEORY  AND
REGARDLESS OF WHETHER ANY  INDEMNITEE  IS A PARTY  THERETO,  AND SUCH  INDEMNITY

                                       81



SHALL  EXTEND  TO  EACH  INDEMNITEE   NOTWITHSTANDING  THE  SOLE  OR  CONCURRENT
NEGLIGENCE  OF EVERY KIND OR CHARACTER  WHATSOEVER,  WHETHER  ACTIVE OR PASSIVE,
WHETHER AN AFFIRMATIVE ACT OR AN OMISSION,  INCLUDING  WITHOUT  LIMITATION,  ALL
TYPES OF NEGLIGENT  CONDUCT  IDENTIFIED IN THE RESTATEMENT  (SECOND) OF TORTS OF
ONE OR MORE OF THE INDEMNITEES OR BY REASON OF STRICT LIABILITY  IMPOSED WITHOUT
FAULT ON ANY ONE OR MORE OF THE INDEMNITEES;  PROVIDED THAT SUCH INDEMNITY SHALL
NOT, AS TO ANY INDEMNITEE,  BE AVAILABLE TO THE EXTENT THAT SUCH LOSSES, CLAIMS,
DAMAGES,  LIABILITIES OR RELATED EXPENSES ARE DETERMINED BY A COURT OF COMPETENT
JURISDICTION BY FINAL AND NONAPPEALABLE JUDGMENT TO HAVE RESULTED FROM THE GROSS
NEGLIGENCE OR WILLFUL MISCONDUCT OF SUCH INDEMNITEE.

              (c) To the  extent  that  the  Borrower  fails  to pay any  amount
required to be paid by it to the Administrative  Agent or the Issuing Bank under
Section   12.03(a)  or  (b),  each  Lender   severally  agrees  to  pay  to  the
Administrative  Agent or the Issuing  Bank,  as the case may be,  such  Lender's
Applicable   Percentage   (determined   as  of  the  time  that  the  applicable
unreimbursed  expense or  indemnity  payment is sought) of such  unpaid  amount;
provided that the  unreimbursed  expense or  indemnified  loss,  claim,  damage,
liability  or related  expense,  as the case may be, was incurred by or asserted
against the Administrative Agent or the Issuing Bank in its capacity as such.

              (d) To the extent  permitted by applicable law, the Borrower shall
not assert, and hereby waives,  any claim against any Indemnitee,  on any theory
of  liability,  for special,  indirect,  consequential  or punitive  damages (as
opposed to direct or actual damages) arising out of, in connection with, or as a
result  of,  this  Agreement,  any  other  Loan  Document  or any  agreement  or
instrument contemplated hereby or thereby, the Transactions,  any Loan or Letter
of Credit or the use of the proceeds thereof.

              (e) All  amounts  due under this  Section  12.03  shall be payable
promptly after written demand therefor.

     Section 12.04 Successors and Assigns.
                   ----------------------

              (a) The  provisions  of this  Agreement  shall be binding upon and
inure to the benefit of the parties hereto and their  respective  successors and
assigns  permitted  hereby  (including  any  Affiliate  of the Issuing Bank that
issues any Letter of  Credit),  except that (i) the  Borrower  may not assign or
otherwise transfer any of its rights or obligations  hereunder without the prior
written consent of each Lender (and any attempted  assignment or transfer by the
Borrower  without  such  consent  shall be null and void) and (ii) no Lender may
assign or  otherwise  transfer  its rights or  obligations  hereunder  except in
accordance  with this Section  12.04.  Nothing in this  Agreement,  expressed or
implied,  shall be construed  to confer upon any Person  (other than the parties
hereto, their respective  successors and assigns permitted hereby (including any
Affiliate  of the Issuing  Bank that issues any Letter of Credit),  Participants
(to the  extent  provided  in Section  12.04(c))  and,  to the extent  expressly
contemplated  hereby, the Related Parties of each of the  Administrative  Agent,
the Issuing Bank and the Lenders) any legal or equitable right,  remedy or claim
under or by reason of this Agreement.

                                       82



              (b) (i)   Subject  to   the   conditions   set  forth  in  Section
12.04(b)(ii), any Lender may assign to one or more assignees all or a portion of
its rights and obligations  under this Agreement  (including all or a portion of
its  Commitment  and the Loans at the time  owing to it) with the prior  written
consent (such consent not to be unreasonably withheld) of:

                      A. the  Borrower, provided that no consent of the Borrower
shall be required for an  assignment to a Lender,  an Affiliate of a Lender,  an
Approved Fund (as defined  below) or, if an Event of Default has occurred and is
continuing, any other assignee; and

                      B. the Administrative Agent, provided  that no consent  of
the Administrative Agent shall be required for an assignment to an assignee that
is a Lender immediately prior to giving effect to such assignment.

                  (ii) Assignments shall be subject to the following  additional
conditions:

                      A. except in the case of an  assignment  to a Lender or an
Affiliate of a Lender or an  assignment  of the entire  remaining  amount of the
assigning  Lender's  Commitment,  the amount of the  Commitment of the assigning
Lender subject to each such assignment (determined as of the date the Assignment
and   Assumption   with  respect  to  such   assignment   is  delivered  to  the
Administrative  Agent)  shall not be less  than  $5,000,000  unless  each of the
Borrower and the Administrative  Agent otherwise consent,  provided that no such
consent of the  Borrower  shall be required if an Event of Default has  occurred
and is continuing;

                      B. each partial assignment shall be made as an  assignment
of a proportionate  part of all the  assigning  Lender's rights and  obligations
under this Agreement;

                      C. the  parties  to  each  assignment  shall  execute  and
deliver to the  Administrative  Agent an  Assignment  and  Assumption,  together
with a processing and recordation fee of $3,500;

                      D. the  assignee, if  it  shall  not  be a  Lender,  shall
deliver to the Administrative Agent an Administrative Questionnaire; and

                      E. in the case of an assignment  to a CLO,  the  assigning
Lender shall  retain the sole right to approve any  amendment,  modification  or
waiver of any  provision of this  Agreement,  provided that the  Assignment  and
Assumption  between  such Lender and such CLO may provide  that such Lender will
not,  without the consent of such CLO, agree to any amendment,  modification  or
waiver described in the first proviso to Section 12.02 that affects such CLO.

                  (iii) Subject to Section  12.04(b)(iv)  and the acceptance and
recording  thereof,  from  and  after  the  effective  date  specified  in  each
Assignment and Assumption the assignee  thereunder  shall be a party hereto and,
to the extent of the interest  assigned by such Assignment and Assumption,  have
the rights and obligations of a Lender under this  Agreement,  and the assigning
Lender  thereunder  shall,  to the  extent  of the  interest  assigned  by  such
Assignment and Assumption, be released from its obligations under this Agreement
(and, in the case of an Assignment and Assumption  covering all of the assigning

                                       83



Lender's rights and obligations under this Agreement, such Lender shall cease to
be a party  hereto but shall  continue to be entitled to the benefits of Section
5.01,  Section 5.02, Section 5.03 and Section 12.03). Any assignment or transfer
by a Lender of rights or  obligations  under this Agreement that does not comply
with this  Section  12.04 shall be treated for  purposes of this  Agreement as a
sale by such  Lender  of a  participation  in such  rights  and  obligations  in
accordance with Section 12.04(c).

                  (iv) The Administrative  Agent,  acting for this purpose as an
agent of the  Borrower,  shall  maintain  at one of its  offices  a copy of each
Assignment and Assumption  delivered to it and a register for the recordation of
the names and  addresses of the Lenders,  and the Maximum  Credit Amount of, and
principal  amount of the  Loans  and LC  Disbursements  owing  to,  each  Lender
pursuant to the terms hereof from time to time (the "Register").  The entries in
the Register shall be conclusive,  and the Borrower,  the Administrative  Agent,
the Issuing Bank and the Lenders may treat each Person whose name is recorded in
the Register pursuant to the terms hereof as a Lender hereunder for all purposes
of this Agreement, notwithstanding notice to the contrary. The Register shall be
available for  inspection by the Borrower,  the Issuing Bank and any Lender,  at
any  reasonable  time and from time to time upon  reasonable  prior  notice.  In
connection with any changes to the Register,  if necessary,  the  Administrative
Agent will  reflect the  revisions on Annex I and forward a copy of such revised
Annex I to the Borrower, the Issuing Bank and each Lender.

                  (v)  Upon  its  receipt  of a duly  completed  Assignment  and
Assumption  executed by an  assigning  Lender and an  assignee,  the  assignee's
completed  Administrative  Questionnaire (unless the assignee shall already be a
Lender  hereunder),  the processing and  recordation  fee referred to in Section
12.04(b)  and  any  written  consent  to such  assignment  required  by  Section
12.04(b),  the Administrative  Agent shall accept such Assignment and Assumption
and record the  information  contained  therein in the  Register.  No assignment
shall be effective for purposes of this Agreement unless it has been recorded in
the Register as provided in this Section 12.04(b).

              (c) (i) Any Lender may,  without the consent of the Borrower,  the
Administrative  Agent or the Issuing Bank,  sell  participations  to one or more
banks or other entities (a  "Participant")  in all or a portion of such Lender's
                             -----------
rights and obligations  under this Agreement  (including all or a portion of its
Commitment  and the  Loans  owing  to  it);  provided  that  (A)  such  Lender's
obligations under this Agreement shall remain  unchanged,  (B) such Lender shall
remain solely  responsible  to the other parties  hereto for the  performance of
such  obligations and (C) the Borrower,  the  Administrative  Agent, the Issuing
Bank and the other Lenders shall  continue to deal solely and directly with such
Lender in  connection  with such  Lender's  rights  and  obligations  under this
Agreement.  Any agreement or instrument  pursuant to which a Lender sells such a
participation  shall  provide  that such Lender  shall  retain the sole right to
enforce this Agreement and to approve any amendment,  modification  or waiver of
any provision of this Agreement;  provided that such agreement or instrument may
provide that such Lender will not, without the consent of the Participant, agree
to any  amendment,  modification  or waiver  described in the proviso to Section
12.02 that affects such  Participant.  In addition such  agreement  must provide
that the  Participant be bound by the  provisions of Section  12.03.  Subject to
Section  12.04(c)(ii),  the  Borrower  agrees  that  each  Participant  shall be
entitled to the benefits of Section  5.01,  Section 5.02 and Section 5.03 to the
same extent as if it were a Lender and had acquired  its interest by  assignment
pursuant to Section  12.04(b).  To the extent permitted by law, each Participant

                                       84



also shall be  entitled  to the  benefits  of Section  12.08 as though it were a
Lender,  provided such  Participant  agrees to be subject to Section  4.01(c) as
though it were a Lender.

                  (ii) A  Participant  shall  not be  entitled  to  receive  any
greater  payment under Section 5.01 or Section 5.03 than the  applicable  Lender
would have been  entitled to receive with respect to the  participation  sold to
such  Participant,  unless the sale of the  participation to such Participant is
made with the Borrower's  prior written  consent.  A Participant that would be a
Foreign  Lender if it were a Lender  shall not be  entitled  to the  benefits of
Section 5.03 unless the Borrower is notified of the  participation  sold to such
Participant and such  Participant  agrees,  for the benefit of the Borrower,  to
comply with Section 5.03(e) as though it were a Lender.

              (d) Any  Lender  may at any  time  pledge  or  assign  a  security
interest  in all or any  portion of its rights  under this  Agreement  to secure
obligations  of such  Lender,  including  any  pledge  or  assignment  to secure
obligations to a Federal Reserve Bank, and this Section 12.04(d) shall not apply
to any such pledge or assignment of a security  interest;  provided that no such
pledge or assignment of a security  interest  shall release a Lender from any of
its  obligations  hereunder or substitute  any such pledgee or assignee for such
Lender as a party hereto.

     Section 12.05 Survival; Revival; Reinstatement.
                   --------------------------------

              (a) All covenants, agreements, representations and warranties made
by the Borrower herein and in the certificates or other instruments delivered in
connection  with or pursuant to this  Agreement or any other Loan Document shall
be  considered  to have been relied upon by the other  parties  hereto and shall
survive the execution and delivery of this Agreement and the making of any Loans
and issuance of any Letters of Credit,  regardless of any investigation  made by
any  such  other   party  or  on  its  behalf  and   notwithstanding   that  the
Administrative  Agent,  the  Issuing  Bank or any  Lender may have had notice or
knowledge of any Default or incorrect representation or warranty at the time any
credit is  extended  hereunder,  and shall  continue in full force and effect as
long as the  principal of or any accrued  interest on any Loan or any fee or any
other  amount  payable  under this  Agreement is  outstanding  and unpaid or any
Letter of Credit is outstanding and so long as the Commitments  have not expired
or terminated.  The provisions of Section 5.01,  Section 5.02,  Section 5.03 and
Section  12.03 and ARTICLE XI shall  survive and remain in full force and effect
regardless of the  consummation of the  transactions  contemplated  hereby,  the
repayment of the Loans,  the  expiration or termination of the Letters of Credit
and the  Commitments  or the  termination  of this  Agreement,  any  other  Loan
Document or any provision hereof or thereof.

              (b) To the  extent  that  any  payments  on  the  Indebtedness  or
proceeds  of  any  collateral  are  subsequently  invalidated,  declared  to  be
fraudulent  or  preferential,  set aside or  required to be repaid to a trustee,
debtor in possession,  receiver or other Person under any bankruptcy law, common
law or equitable cause, then to such extent, the Indebtedness so satisfied shall
be revived and continue as if such payment or proceeds had not been received and
the Administrative  Agent's and the Lenders' Liens, security interests,  rights,
powers and remedies  under this  Agreement and each Loan Document shall continue
in  full  force  and  effect.  In  such  event,  each  Loan  Document  shall  be

                                       85



automatically  reinstated  and the  Borrower  shall  take such  action as may be
reasonably  requested by the Administrative Agent and the Lenders to effect such
reinstatement.

     Section 12.06 Counterparts; Integration; Effectiveness.
                   ----------------------------------------

              (a) This  Agreement  may  be  executed  in  counterparts  (and  by
different  parties  hereto  on  different  counterparts),  each of  which  shall
constitute an original,  but all of which when taken together shall constitute a
single contract.

              (b) This  Agreement,  the other Loan  Documents  and any  separate
letter  agreements  with  respect to fees  payable to the  Administrative  Agent
constitute the entire contract among the parties  relating to the subject matter
hereof  and  thereof  and  supersede  any  and  all  previous   agreements   and
understandings,  oral or  written,  relating to the  subject  matter  hereof and
thereof.  This  Agreement  and the  other  Loan  Documents  represent  the final
agreement  among the parties hereto and thereto and may not be  contradicted  by
evidence of prior, contemporaneous or subsequent oral agreements of the parties.
There are no unwritten oral agreements between the parties.

              (c) Except as  provided  in Section  6.01,  this  Agreement  shall
become  effective when it shall have been executed by the  Administrative  Agent
and when the Administrative Agent shall have received counterparts hereof which,
when taken  together,  bear the signatures of each of the other parties  hereto,
and  thereafter  shall be binding  upon and inure to the  benefit of the parties
hereto and their  respective  successors  and  assigns.  Delivery of an executed
counterpart of a signature page of this Agreement by telecopy shall be effective
as delivery of a manually executed counterpart of this Agreement.

     Section 12.07 Severability.  Any  provision of this  Agreement or any other
                   ------------
Loan Document held to be invalid,  illegal or  unenforceable in any jurisdiction
shall, as to such jurisdiction, be ineffective to the extent of such invalidity,
illegality or  unenforceability  without  affecting  the validity,  legality and
enforceability of the remaining provisions hereof or thereof; and the invalidity
of a particular provision in a particular jurisdiction shall not invalidate such
provision in any other jurisdiction.

     Section  12.08 Right of Setoff.  If an Event of Default shall have occurred
                    ---------------
and be continuing,  each Lender and each of its Affiliates is hereby  authorized
at any time and from time to time,  to the fullest  extent  permitted by law, to
set off and apply any and all  deposits  (general  or  special,  time or demand,
provisional  or final) at any time held and  other  obligations  (of  whatsoever
kind, including,  without limitations  obligations under Swap Agreements) at any
time owing by such  Lender or  Affiliate  to or for the credit or the account of
the Borrower or any Material  Subsidiary  against any of and all the obligations
of the Borrower or any Material  Subsidiary owed to such Lender now or hereafter
existing  under this  Agreement  or any other  Loan  Document,  irrespective  of
whether or not such Lender  shall have made any demand  under this  Agreement or
any other Loan Document and although  such  obligations  may be  unmatured.  The
rights of each Lender under this  Section  12.08 are in addition to other rights
and  remedies  (including  other  rights of  setoff)  which  such  Lender or its
Affiliates may have.

                                       86



     Section 12.09 GOVERNING LAW; JURISDICTION; CONSENT TO SERVICE OF PROCESS.
                   ----------------------------------------------------------

              (a) THIS  AGREEMENT  AND THE  NOTES  SHALL  BE  GOVERNED  BY,  AND
CONSTRUED  IN  ACCORDANCE  WITH,  THE LAWS OF THE  STATE OF TEXAS  EXCEPT TO THE
EXTENT THAT  UNITED  STATES  FEDERAL  LAW  PERMITS  ANY LENDER TO CONTRACT  FOR,
CHARGE, RECEIVE, RESERVE OR TAKE INTEREST AT THE RATE ALLOWED BY THE LAWS OF THE
STATE WHERE SUCH LENDER IS LOCATED. CHAPTER 346 OF THE TEXAS FINANCE CODE (WHICH
REGULATES  CERTAIN  REVOLVING  CREDIT  LOAN  ACCOUNTS  AND  REVOLVING  TRI-PARTY
ACCOUNTS) SHALL NOT APPLY TO THIS AGREEMENT OR THE NOTES.

              (b) ANY  LEGAL  ACTION  OR  PROCEEDING  WITH  RESPECT  TO THE LOAN
DOCUMENTS  SHALL BE BROUGHT IN THE COURTS OF THE STATE OF TEXAS OR OF THE UNITED
STATES OF AMERICA FOR THE  SOUTHERN  DISTRICT OF TEXAS,  AND, BY  EXECUTION  AND
DELIVERY OF THIS  AGREEMENT,  EACH PARTY  HEREBY  ACCEPTS FOR ITSELF AND (TO THE
EXTENT   PERMITTED  BY  LAW)  IN  RESPECT  OF  ITS   PROPERTY,   GENERALLY   AND
UNCONDITIONALLY,  THE  JURISDICTION OF THE AFORESAID  COURTS.  EACH PARTY HEREBY
IRREVOCABLY WAIVES ANY OBJECTION,  INCLUDING,  WITHOUT LIMITATION, ANY OBJECTION
TO THE LAYING OF VENUE OR BASED ON THE GROUNDS OF FORUM NON CONVENIENS, WHICH IT
MAY NOW OR HEREAFTER  HAVE TO THE BRINGING OF ANY SUCH ACTION OR  PROCEEDING  IN
SUCH RESPECTIVE JURISDICTIONS.  THIS SUBMISSION TO JURISDICTION IS NON-EXCLUSIVE
AND DOES NOT PRECLUDE A PARTY FROM OBTAINING  JURISDICTION OVER ANOTHER PARTY IN
ANY COURT OTHERWISE HAVING JURISDICTION.

              (c) THE  BORROWER  HEREBY  IRREVOCABLY  DESIGNATES,  APPOINTS  AND
EMPOWERS AND HEREBY CONFERS AN IRREVOCABLE  SPECIAL POWER, AMPLE AND SUFFICIENT,
TO CT CORPORATION SYSTEM, WITH OFFICES ON THE DATE HEREOF AT DENVER, COLORADO AS
ITS DESIGNEE,  APPOINTEE AND AGENT WITH RESPECT TO ANY SUCH ACTION OR PROCEEDING
IN TEXAS TO  RECEIVE,  ACCEPT  AND  ACKNOWLEDGE  FOR AND ON ITS  BEHALF,  AND IN
RESPECT OF ITS PROPERTY,  SERVICE OF ANY AND ALL LEGAL PROCESS, SUMMONS, NOTICES
AND  DOCUMENTS  WHICH MAY BE SERVED IN ANY SUCH  PROCEEDING  AND AGREES THAT THE
FAILURE OF SUCH  AGENT TO GIVE ANY ADVICE OF ANY SUCH  SERVICE OF PROCESS TO THE
BORROWER SHALL NOT IMPAIR OR AFFECT THE VALIDITY OF SUCH SERVICE OR OF ANY CLAIM
BASED THEREON. IF FOR ANY REASON SUCH DESIGNEE,  APPOINTEE AND AGENT SHALL CEASE
TO BE AVAILABLE TO ACT AS SUCH, THE BORROWER AGREES TO DESIGNATE A NEW DESIGNEE,
APPOINTEE AND AGENT IN TEXAS REASONABLY SATISFACTORY TO THE ADMINISTRATIVE AGENT
ON THE TERMS AND FOR THE  PURPOSES  OF THIS  PROVISION.  EACH PARTY  IRREVOCABLY
CONSENTS  TO THE SERVICE OF PROCESS OF ANY OF THE  AFOREMENTIONED  COURTS IN ANY
SUCH ACTION OR  PROCEEDING  BY THE MAILING OF COPIES  THEREOF BY  REGISTERED  OR
CERTIFIED MAIL, POSTAGE PREPAID, TO IT AT THE ADDRESS SPECIFIED IN Section 12.01
OR SUCH  OTHER  ADDRESS  AS IS  SPECIFIED  PURSUANT  TO  Section  12.01  (OR ITS

                                       87



ASSIGNMENT  AND  ASSUMPTION),  SUCH SERVICE TO BECOME  EFFECTIVE  UPON  RECEIPT.
NOTHING  HEREIN  SHALL  AFFECT  THE RIGHT OF A PARTY OR ANY  HOLDER OF A NOTE TO
SERVE  PROCESS  IN ANY  OTHER  MANNER  PERMITTED  BY LAW  OR TO  COMMENCE  LEGAL
PROCEEDINGS   OR  OTHERWISE   PROCEED   AGAINST   ANOTHER  PARTY  IN  ANY  OTHER
JURISDICTION.

              (d) EACH PARTY HEREBY (i) IRREVOCABLY AND UNCONDITIONALLY  WAIVES,
TO THE FULLEST  EXTENT  PERMITTED  BY LAW,  TRIAL BY JURY IN ANY LEGAL ACTION OR
PROCEEDING  RELATING TO THIS  AGREEMENT  OR ANY OTHER LOAN  DOCUMENT AND FOR ANY
COUNTERCLAIM  THEREIN;  (ii)  IRREVOCABLY  WAIVES,  TO THE  MAXIMUM  EXTENT  NOT
PROHIBITED  BY LAW,  ANY  RIGHT  IT MAY HAVE TO  CLAIM  OR  RECOVER  IN ANY SUCH
LITIGATION ANY SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES, OR DAMAGES
OTHER THAN, OR IN ADDITION TO, ACTUAL  DAMAGES;  (iii)  CERTIFIES  THAT NO PARTY
HERETO  NOR ANY  REPRESENTATIVE  OR AGENT OF  COUNSEL  FOR ANY PARTY  HERETO HAS
REPRESENTED,  EXPRESSLY OR  OTHERWISE,  OR IMPLIED THAT SUCH PARTY WOULD NOT, IN
THE  EVENT OF  LITIGATION,  SEEK TO  ENFORCE  THE  FOREGOING  WAIVERS,  AND (iv)
ACKNOWLEDGES  THAT IT HAS BEEN  INDUCED TO ENTER INTO THIS  AGREEMENT,  THE LOAN
DOCUMENTS AND THE TRANSACTIONS  CONTEMPLATED  HEREBY AND THEREBY BY, AMONG OTHER
THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS CONTAINED IN THIS Section 12.09.

     Section 12.10 Headings.  Article  and  Section  headings  and  the Table of
                   --------
Contents used herein are for convenience of reference only, are not part of this
Agreement  and  shall  not  affect  the   construction  of,  or  be  taken  into
consideration in interpreting, this Agreement.

     Section 12.11 Confidentiality.  Each  of  the   Administrative  Agent,  the
                   ---------------
Issuing  Bank and the Lenders  agrees to  maintain  the  confidentiality  of the
Information (as defined below),  except that Information may be disclosed (a) to
its and its Affiliates'  directors,  officers,  employees and agents,  including
accountants,  legal  counsel and other  advisors (it being  understood  that the
Persons to whom such  disclosure  is made will be informed  of the  confidential
nature  of  such   Information   and   instructed   to  keep  such   Information
confidential),  (b) to the extent requested by any regulatory authority,  (c) to
the extent  required by  applicable  laws or  regulations  or by any subpoena or
similar  legal  process,  (d) to any other party to this  Agreement or any other
Loan Document,  (e) in connection with the exercise of any remedies hereunder or
under any other Loan Document or any suit, action or proceeding relating to this
Agreement or any other Loan Document or the  enforcement of rights  hereunder or
thereunder,  (f) subject to an agreement containing provisions substantially the
same as those of this Section 12.11,  to (i) any assignee of or Participant  in,
or  any  prospective  assignee  of or  Participant  in,  any of  its  rights  or
obligations under this Agreement or (ii) any actual or prospective  counterparty
(or its  advisors)  to any  Swap  Agreement  relating  to the  Borrower  and its
obligations,  (g) with the  consent of the  Borrower  or (h) to the extent  such
Information (i) becomes publicly available other than as a result of a breach of
this Section 12.11 or (ii) becomes  available to the  Administrative  Agent, the
Issuing Bank or any Lender on a  nonconfidential  basis from a source other than
the Borrower.  For the purposes of this Section 12.11,  "Information"  means all
                                                         -----------
information  received from the Borrower or any Material  Subsidiary  relating to

                                       88



the Borrower or any Material  Subsidiary  and their  businesses,  other than any
such information that is available to the Administrative Agent, the Issuing Bank
or any Lender on a nonconfidential  basis prior to disclosure by the Borrower or
a Material  Subsidiary;  provided that, in the case of information received from
the Borrower or any Material  Subsidiary after the date hereof, such information
is  clearly  identified  at the time of  delivery  as  confidential.  Any Person
required to maintain  the  confidentiality  of  Information  as provided in this
Section 12.11 shall be considered to have complied with its  obligation to do so
if  such  Person  has  exercised  the  same  degree  of  care  to  maintain  the
confidentiality  of such  Information  as such  Person  would  accord to its own
confidential information.

     Section 12.12 Interest Rate Limitation.  It is the intention of the parties
                   ------------------------
hereto that each Lender shall conform  strictly to usury laws  applicable to it.
Accordingly, if the transactions contemplated hereby would be usurious as to any
Lender under laws  applicable to it (including  the laws of the United States of
America  and the  State of Texas or any  other  jurisdiction  whose  laws may be
mandatorily  applicable to such Lender  notwithstanding  the other provisions of
this Agreement),  then, in that event,  notwithstanding anything to the contrary
in any of the Loan Documents or any agreement entered into in connection with or
as security  for the Notes,  it is agreed as follows:  (i) the  aggregate of all
consideration which constitutes interest under law applicable to any Lender that
is contracted for, taken, reserved, charged or received by such Lender under any
of the Loan  Documents or agreements  or otherwise in connection  with the Notes
shall  under  no  circumstances  exceed  the  maximum  amount  allowed  by  such
applicable  law,  and  any  excess  shall  be  canceled   automatically  and  if
theretofore paid shall be credited by such Lender on the principal amount of the
Indebtedness  (or, to the extent that the principal  amount of the  Indebtedness
shall have been or would thereby be paid in full, refunded by such Lender to the
Borrower);  and (ii) in the event that the maturity of the Notes is  accelerated
by reason of an  election  of the  holder  thereof  resulting  from any Event of
Default under this  Agreement or  otherwise,  or in the event of any required or
permitted  prepayment,  then such consideration that constitutes  interest under
law  applicable  to any Lender may never  include  more than the maximum  amount
allowed by such applicable  law, and excess  interest,  if any,  provided for in
this Agreement or otherwise shall be canceled automatically by such Lender as of
the date of such  acceleration or prepayment and, if theretofore  paid, shall be
credited by such Lender on the principal amount of the Indebtedness  (or, to the
extent that the principal  amount of the  Indebtedness  shall have been or would
thereby be paid in full, refunded by such Lender to the Borrower). All sums paid
or agreed to be paid to any Lender for the use, forbearance or detention of sums
due hereunder  shall, to the extent  permitted by law applicable to such Lender,
be amortized,  prorated,  allocated and spread throughout the stated term of the
Loans evidenced by the Notes until payment in full so that the rate or amount of
interest on account of any Loans  hereunder  does not exceed the maximum  amount
allowed  by such  applicable  law.  If at any time and from time to time (i) the
amount of  interest  payable to any Lender on any date shall be  computed at the
Highest Lawful Rate applicable to such Lender pursuant to this Section 12.12 and
(ii) in  respect of any  subsequent  interest  computation  period the amount of
interest  otherwise  payable  to such  Lender  would be less than the  amount of
interest  payable to such Lender  computed at the Highest Lawful Rate applicable
to such Lender, then the amount of interest payable to such Lender in respect of
such subsequent interest computation period shall continue to be computed at the
Highest Lawful Rate applicable to such Lender until the total amount of interest
payable to such Lender shall equal the total amount of interest which would have
been payable to such Lender if the total  amount of interest  had been  computed
without giving effect to this Section  12.12.  To the extent that Chapter 303 of

                                       89



the Texas  Finance Code is relevant for the purpose of  determining  the Highest
Lawful  Rate  applicable  to a  Lender,  such  Lender  elects to  determine  the
applicable  rate ceiling  under such Chapter by the weekly  ceiling from time to
time in  effect.  Chapter  346 of the Texas  Finance  Code does not apply to the
Borrower's obligations hereunder.

     Section 12.13 EXCULPATION   PROVISIONS.    EACH   OF   THE  PARTIES  HERETO
                   ------------------------
SPECIFICALLY AGREES THAT IT HAS A DUTY TO READ THIS AGREEMENT AND THE OTHER LOAN
DOCUMENTS  AND AGREES THAT IT IS CHARGED WITH NOTICE AND  KNOWLEDGE OF THE TERMS
OF THIS  AGREEMENT AND THE OTHER LOAN  DOCUMENTS;  THAT IT HAS IN FACT READ THIS
AGREEMENT AND IS FULLY  INFORMED AND HAS FULL NOTICE AND KNOWLEDGE OF THE TERMS,
CONDITIONS  AND  EFFECTS  OF THIS  AGREEMENT;  THAT IT HAS BEEN  REPRESENTED  BY
INDEPENDENT  LEGAL COUNSEL OF ITS CHOICE  THROUGHOUT THE NEGOTIATIONS  PRECEDING
ITS EXECUTION OF THIS AGREEMENT AND THE OTHER LOAN  DOCUMENTS;  AND HAS RECEIVED
THE ADVICE OF ITS ATTORNEY IN ENTERING  INTO THIS  AGREEMENT  AND THE OTHER LOAN
DOCUMENTS;  AND THAT IT RECOGNIZES  THAT CERTAIN OF THE TERMS OF THIS  AGREEMENT
AND THE OTHER LOAN DOCUMENTS RESULT IN ONE PARTY ASSUMING THE LIABILITY INHERENT
IN SOME  ASPECTS  OF THE  TRANSACTION  AND  RELIEVING  THE  OTHER  PARTY  OF ITS
RESPONSIBILITY  FOR SUCH LIABILITY.  EACH PARTY HERETO AGREES AND COVENANTS THAT
IT WILL NOT CONTEST THE VALIDITY OR ENFORCEABILITY OF ANY EXCULPATORY  PROVISION
OF THIS  AGREEMENT AND THE OTHER LOAN  DOCUMENTS ON THE BASIS THAT THE PARTY HAD
NO  NOTICE  OR  KNOWLEDGE  OF  SUCH  PROVISION  OR  THAT  THE  PROVISION  IS NOT
"CONSPICUOUS."

     Section 12.14 Existing Credit Agreement. This Agreement amends and restates
                   -------------------------
the  Existing  Credit  Agreement  in its  entirety.  On the date of the  initial
funding of Loans  hereunder,  the loans and other Debt of the Borrower under the
Existing Credit  Agreement shall be renewed,  rearranged,  modified and extended
with the proceeds of the initial  funding and the  "Commitments"  of the lenders
under the Existing  Credit  Agreement  shall be superseded by this Agreement and
terminated  (except as otherwise  expressly  provided in Section 12.05(a) of the
Existing Credit Agreement with respect to the survival of certain  covenants and
agreements  made  by  the  Borrower  in  the  Existing  Credit  Agreement).  The
undersigned  waive any right to receive any notice of such  termination  and any
right to receive any notice of  prepayment  of amounts  owed under the  Existing
Credit Agreement.  Each Lender that was a party to the Existing Credit Agreement
hereby  agrees  to return  to the  Borrower,  with  reasonable  promptness,  any
promissory  note delivered by the Borrower to such Lender in connection with the
Existing Credit Agreement.

     Section 12.15 USA Patriot Act Notice.  Each  Lender  hereby  notifies   the
                   ----------------------
Borrower that pursuant to the  requirements of the USA Patriot Act (Title III of
Pub. L. 107-56  (signed into law October 26, 2001)) (the "Act"),  it is required
to obtain,  verify and record  information  that identifies the Borrower,  which
information  includes the name and address of the Borrower and other information
that will allow such Lender to identify the Borrower in accordance with the Act.

                                       90



     The parties hereto have caused this Agreement to be duly executed as of the
day and year first above written.

BORROWER:                 ST MARY LAND & EXPLORATION COMPANY


                          By:      /S/ DAVID W. HONEYFIELD
                                   -----------------------
                          Name:    David W. Honeyfield
                          Title:   Vice President - Finance, Secretary and
                                   Treasurer



AGENTS AND LENDERS:      WACHOVIA BANK, NATIONAL
                         ASSOCIATION, Individually and as
                         Administrative Agent


                         By:      /S/ PHILIP J. TRINDER
                                  ---------------------
                         Name:    Philip J. Trinder
                         Title:   Vice President



                          WELLS FARGO BANK, N.A., Individually
                          and as Syndication Agent


                          By:      /S/ LAURA BUMGARNER
                                   -------------------
                          Name:    Laura Bumgarner
                                   ---------------
                          Title:   Relationship Manager, AVP
                                   -------------------------



                          JPMORGAN    CHASE   BANK,    N.A.,  Individually
                          and as Co-Documentation Agent


                          By:      /S/ ELIZABETH PAVLAS
                                   --------------------
                          Name:    Elizabeth Pavlas
                                   ----------------
                          Title:   Associate
                                   ---------



                          COMERICA BANK-TEXAS, Individually and
                          as Co-Documentation Agent


                          By:      /S/ PETER L. SEFZIK
                                   -------------------
                          Name:    Peter L. Sefzik
                                   ---------------
                          Title:   Vice President
                                   --------------



                          BNP PARIBAS, Individually and as
                          Co-Documentation Agent


                          By:      /S/ BETSY JOCHER
                                   ----------------
                          Name:    Betsy Jocher
                                   ------------
                          Title:   Vice President
                                   --------------

                          By:      /S/POLLY SCHOTT
                                   ---------------
                          Name:    Polly Schott
                                   ------------
                          Title:   Vice President
                                   --------------



                          ROYAL BANK OF CANADA


                          By:      /S/ LORNE A GARTNER
                                   -------------------
                          Name:    LORNE A. GARTNER
                                   ----------------
                          Title:   AUTHORIZED SIGNATORY
                                   --------------------



                          BANK OF SCOTLAND


                          By:      /S/ KAREN WEICH
                                   ---------------
                          Name:    KAREN WEICH
                                   -----------
                          Title:   ASSISTANT VICE PRESIDENT
                                   ------------------------



                          U.S. BANK NATIONAL ASSOCIATION


                          By:      /S/ MARK E. THOMPSON
                                   --------------------
                          Name:    Mark E. Thompson
                                   ----------------
                          Title:   Vice President
                                   --------------



                          HIBERNIA NATIONAL BANK


                          By:      /S/ DARIA MAHONEY
                                   -----------------
                          Name:    Daria Mahoney
                                   -------------
                          Title:   Vice President
                                   --------------



                          KEY BANK


                          By:      /S/ THOMAS RAJAS
                                   ----------------
                          Name:    Thomas Rajas
                                   ------------
                          Title:   Vice President
                                   --------------



                                     ANNEX I
                               LIST OF COMMITMENTS

 ---------------------------------------- ----------------------- ------------
                  Name of Lender           Applicable Percentage    Commitment
 ---------------------------------------- ----------------------- ------------
 Wachovia Bank, National Association              11.625%          $23,250,000
 ---------------------------------------- ----------------------- ------------
 Wells Fargo Bank, N.A.                           11.625%          $23,250,000
 ---------------------------------------- ----------------------- ------------
 JPMorgan Chase Bank, N.A.                        11.000%          $22,000,000
 ---------------------------------------- ----------------------- ------------
 Comerica Bank - Texas                            11.000%          $22,000,000
 ---------------------------------------- ----------------------- ------------
 BNP Paribas                                      11.000%          $22,000,000
 ---------------------------------------- ----------------------- ------------
 U.S. Bank National Association                   10.000%          $20,000,000
 ---------------------------------------- ----------------------- ------------
 Royal Bank of Canada                               8.750%         $17,500,000
 ---------------------------------------- ----------------------- ------------
 Bank of Scotland                                   8.750%         $17,500,000
 ---------------------------------------- ----------------------- ------------
 Hibernia National Bank                             8.750%         $17,500,000
 ---------------------------------------- ----------------------- ------------
 Key Bank                                           7.500%         $15,000,000
 ---------------------------------------- ----------------------- ------------
 TOTAL                                             100.00%        $200,000,000
 ---------------------------------------- ----------------------- ------------



                                    EXHIBIT A
                                 [FORM OF] NOTE

                      [$___________] [__________], 200[__]

     FOR VALUE RECEIVED,  St. Mary Land &  Exploration  Company,  a Delaware
corporation   (the   "Borrower")   hereby  promises  to  pay  to  the  order  of
[______________________________]  (the  "Lender"),  at the  principal  office of
Wachovia  Bank,   National   Association  (the   "Administrative   Agent"),   at
[______________________________],        the        principal       sum       of
[______________________________]  Dollars  ($[_________]) (or such lesser amount
as shall equal the aggregate  unpaid  principal  amount of the Loans made by the
Lender to the Borrower under the Credit Agreement,  as hereinafter  defined), in
lawful money of the United States of America and in immediately available funds,
on the dates and in the principal amounts provided in the Credit Agreement,  and
to pay  interest  on the  unpaid  principal  amount of each such  Loan,  at such
office,  in like money and funds, for the period  commencing on the date of such
Loan until  such Loan  shall be paid in full,  at the rates per annum and on the
dates provided in the Credit Agreement.

     The date, amount, Type, interest rate, Interest Period and maturity of each
Loan made by the Lender to the Borrower, and each payment made on account of the
principal  thereof,  shall be recorded by the Lender on its books and,  prior to
any  transfer  of this Note,  may be  endorsed  by the  Lender on the  schedules
attached hereto or any continuation thereof or on any separate record maintained
by the Lender.  Failure to make any such notation or to attach a schedule  shall
not affect any Lender's or the  Borrower's  rights or  obligations in respect of
such Loans or affect the validity of such transfer by any Lender of this Note.

     This Note is one of the  Notes  referred  to in the  Amended  and  Restated
Credit   Agreement   dated  as  of  April  7,  2005  among  the  Borrower,   the
Administrative  Agent,  and the  other  agents  and  lenders  signatory  thereto
(including the Lender),  and evidences Loans made by the Lender thereunder (such
Credit Agreement as the same may be amended,  supplemented or restated from time
to time, the "Credit  Agreement").  Capitalized terms used in this Note have the
respective meanings assigned to them in the Credit Agreement.

     This Note is issued pursuant to the Credit Agreement and is entitled to the
benefits provided for in the Credit Agreement and the other Loan Documents.  The
Credit Agreement provides for the acceleration of the maturity of this Note upon
the occurrence of certain  events,  for  prepayments of Loans upon the terms and
conditions specified therein and other provisions relevant to this Note.

     THIS NOTE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE  WITH, THE LAWS
OF THE STATE OF TEXAS.

                                ST. MARY LAND & EXPLORATION COMPANY

                                By:      _______________________________________
                                Name:    _______________________________________
                                Title:   _______________________________________



                                    EXHIBIT B
                                    [FORM OF]
                             COMPLIANCE CERTIFICATE


     The     undersigned     hereby     certifies    that    he/she    is    the
[________________________]of St. Mary Land & Exploration Company, a Delaware
corporation (the  "Borrower"),  and that as such he/she is authorized to execute
this certificate in the foregoing  capacity and on behalf of the Borrower.  With
reference to the Amended and Restated Credit Agreement dated as of April 7, 2005
(together with all  amendments,  supplements or  restatements  thereto being the
"Agreement")  among  the  Borrower,  Wachovia  Bank,  National  Association,  as
Administrative Agent, and the other agents and lenders (the "Lenders") which are
or become a party  thereto,  and such Lenders,  the  undersigned  represents and
warrants as follows (each  capitalized  term used herein having the same meaning
given to it in the Agreement unless otherwise specified):

     (a) The representations and warranties of the Borrower contained in Article
VII of the Agreement and in the Loan  Documents and otherwise made in writing by
or on behalf of the Borrower  pursuant to the Agreement  and the Loan  Documents
were true and  correct  when  made,  and are  repeated  at and as of the time of
delivery  hereof and are true and correct in all material  respects at and as of
the time of  delivery  hereof,  except to the extent  such  representations  and
warranties are expressly limited to an earlier date or the Majority Lenders have
expressly consented in writing to the contrary.

     (b) The Borrower has performed  and complied in all material  respects with
all  agreements  and  conditions  contained  in the  Agreement  and in the  Loan
Documents  required to be  performed  or complied  with by it prior to or at the
time of delivery hereof or specify default and describe.

     (c) Since December 31, 2004, no change has occurred,  either in any case or
in the aggregate,  in the condition,  financial or otherwise, of the Borrower or
any Material  Subsidiary  which could  reasonably be expected to have a Material
Adverse Effect [or specify event].

     (d) There  exists no Default or Event of Default  [or  specify  Default and
describe].

     (e) Attached  hereto are the detailed  computations  necessary to determine
whether the Borrower is in  compliance  with Section 9.01 and Section 8.14 as of
the end of the [fiscal quarter][fiscal year] ending [ ].

     EXECUTED AND DELIVERED this [   ] day of [   ].

                                ST. MARY LAND & EXPLORATION COMPANY

                                By:      _______________________________________
                                Name:    _______________________________________
                                Title:   _______________________________________




                                    EXHIBIT C
                              FORM OF LEGAL OPINION

                                  April 7, 2005

To Each of the Lenders Parties to the
Credit Agreement Hereinafter
Referred to and Wachovia Bank,
National Association, as Administrative Agent

     Re:  St.  Mary Land &  Exploration  Company/Wachovia  Bank/$500,000,000
          Senior Secured Revolving Credit Facility

Ladies and Gentlemen:

     We have acted as counsel to St.  Mary Land  &  Exploration  Company,  a
Delaware  corporation  ("Borrower"),  Nance  Petroleum  Corporation,  a  Montana
corporation   ("Nance"),   St.  Mary  Energy  Company,  a  Delaware  corporation
("Energy"), and NPC Inc., a Colorado corporation ("NPC") (exclusive of Borrower,
collectively  "Guarantors") in connection with the execution and delivery of the
Amended and  Restated  Credit  Agreement  dated as of April 7, 2005 (the "Credit
Agreement")   between  Borrower,   Wachovia  Bank,  National   Association,   as
Administrative   Agent  and  the  lenders  signatory  to  the  Credit  Agreement
("Lenders") and the transactions contemplated thereby. This opinion is furnished
to you pursuant to Section 6.01(i) of the Credit Agreement.

     Unless  defined  in this  opinion,  capitalized  terms  are used  herein as
defined in the Credit Agreement.

     In so acting,  we have examined  executed  originals or counterparts of the
following  documents,  each dated the date hereof  unless  otherwise  noted (the
"Loan Documents"):

     (a) the Credit Agreement;

     (b) the Notes;

     (c) the Pledge - Borrower;

     (d) the Pledge - Nance;

     (e) each Guaranty Agreement;

     (f) the  Deed of  Trust,  Mortgage,  Line of  Credit  Mortgage  Assignment,
Security Agreement, Fixture Filing and Financing Statement; and

     (g) the Supplement and Amendment to Deed of Trust, Mortgage, Line of Credit
Mortgage,   Assignment,   Security  Agreement,   Fixture  Filing  and  Financing
Statement.

                                  Exhibit C-1



     We have also  examined,  and relied upon the  accuracy  of factual  matters
contained  in,  originals or copies,  certified or otherwise  identified  to our
satisfaction, of such corporate records and certificates or comparable documents
of  public  officials  and of  officers  and  representatives  of  Borrower  and
Guarantors and such agreements and documents, and have made such examinations of
law, as we have deemed  necessary  in  connection  with the  opinions  set forth
below.

     We have assumed the legal capacity and competence of natural  persons,  the
genuineness of all signatures, the authenticity of all documents submitted to us
as originals and the conformity to original documents of documents  submitted to
us as certified, conformed, photostatic, electronic or facsimile copies. We have
made no independent factual  investigation other than as described above, and as
to other factual matters,  we have relied exclusively on the facts stated in the
representations and warranties contained in the Loan Documents and the Schedules
to the Loan Documents (other than  representations  and warranties  constituting
conclusions  of law on  matters  on which we opine).  We have not  examined  any
records  of any  court,  administrative  tribunal  or other  similar  entity  in
connection with our opinion.

     When an opinion or confirmation is given to our knowledge or to the best of
our  knowledge  or with  reference to matters of which we are aware or which are
known to us, or with another similar  qualification,  the relevant  knowledge or
awareness  is limited to the actual  contemporaneous  knowledge  or awareness of
facts, without  investigation,  by the lawyer who is the current primary contact
for the Borrower or any  Guarantor and the  individual  lawyers in this firm who
have participated in the specific transaction to which this opinion relates.

     We have also  assumed,  without  verification,  (i) that the parties to the
Loan Documents and the other agreements,  instruments and documents  executed in
connection  therewith,  other  than  Borrower  and  Guarantors,  have the  power
(including, without limitation,  corporate power where applicable) and authority
to enter  into  and  perform  the Loan  Documents  and  such  other  agreements,
instruments and documents, (ii) the due authorization, execution and delivery by
such parties other than  Borrower and  Guarantors of each Loan Document and such
other agreements,  instruments and documents,  and (iii) that the Loan Documents
and such other agreements, instruments and documents constitute legal, valid and
binding  obligations  of each such party  other than  Borrower  and  Guarantors,
enforceable  against each such other party in accordance  with their  respective
terms.

     Based  upon the  foregoing  and  subject  to the  assumptions,  exceptions,
limitations and qualifications set forth herein, we are of the opinion that:

     1. The Borrower and the Guarantors are corporations validly existing and in
good standing under the laws of their respective jurisdictions of incorporation.
Borrower  is in good  standing  under the laws of Alabama,  Arkansas,  Colorado,
Kansas, Louisiana,  Minnesota,  Mississippi,  Montana, New Mexico, North Dakota,
Oklahoma,  Texas, Utah and Wyoming.  Nance is in good standing under the laws of
Nebraska,  Nevada,  North Dakota,  Colorado,  New Mexico,  South Dakota,  Texas,
Washington and Wyoming.  Energy is in good standing under the laws of Louisiana,
Mississippi, Oklahoma, Texas and Utah. NPC is in good standing under the laws of
Montana, Nevada, North Dakota, South Dakota and Wyoming.

                                  Exhibit C-2



     2. The Borrower and the Guarantors  have the corporate  power and authority
to enter into and perform their  obligations  under the Loan  Documents to which
they are a party  and,  in the case of the  Borrower,  to issue the  Notes.  The
Borrower's and each of the  Guarantor's  execution,  delivery and performance of
its  obligations  under  the Loan  Documents  to  which  it is a party,  and the
Borrower's  issuance and delivery of the Notes, have been duly authorized by all
requisite  corporate action,  and the Loan Documents to which it is a party have
been duly executed and delivered by each of the Borrower and the Guarantors.

     3. The execution and delivery by Borrower and each of the Guarantors of the
Loan  Documents  to  which  each is a party  do not and the  performance  of the
obligations  thereunder  will  not (a)  violate  Borrower's  or any  Guarantor's
Certificate or Articles of Incorporation, as appropriate, or Bylaws, (b) violate
any present statute, rule or regulation  promulgated by the United States or the
State of  Colorado,  which in our  experience,  is normally  applicable  both to
entities  that  are  not  engaged  in  regulated  business   activities  and  to
transactions  of the type  contemplated  by the Loan  Documents,  (c)  breach or
result in a default  under any  agreement or instrument to which the Borrower or
any  Guarantor  is a party and which is set forth on the exhibit list to (i) the
Borrower's  Annual Report on Form 10-K for the year ended  December 31, 2004, or
(ii) any other report filed by the Borrower  with the  Commission  under Section
13(a) of the Exchange Act after the date of such Annual  Report on Form 10 K and
through the date  hereof,  except for such  breaches or defaults  that would not
have a Material  Adverse Effect,  or result in the creation or imposition of any
security  interest in or lien or encumbrance upon, any of the assets of Borrower
or any  Guarantor  pursuant to any item  referred to in this clause (c),  except
security  interests and liens  created under the Loan  Documents in favor of the
Administrative Agent for the benefit of Lenders.

     4. Each Loan  Document  to which it is a party has been duly  executed  and
delivered on behalf of Borrower and each  Guarantor and  constitutes  the legal,
valid and binding  obligation of Borrower and each  Guarantor,  as  appropriate,
enforceable in accordance with its respective terms.

     5. No consent or approval of, or notice to or filing  with,  any federal or
state  regulatory  authority  of the United  States or the State of  Colorado is
required by Borrower or either  Guarantor in  connection  with the  execution or
delivery by Borrower or either  Guarantor  of any of the Loan  Documents  or the
payment of Borrower's obligations under the Loan Documents.

     6. The  pledged  securities  listed in the Pledge -  Borrower  and Pledge -
Nance  have  been  duly  authorized  and  validly  issued,  are  fully  paid and
non-assessable,  and  constitute  100% of the issued and  outstanding  shares of
stock of the respective issuers thereof.

     7. The Borrower is not an "investment company" or a company "controlled" by
an "investment  company,"  within the meaning of the  Investment  Company Act of
1940, as amended.

     8. Except as set forth on Schedule 7.05 of the Credit Agreement, there are,
to the best of our  knowledge,  no  actions,  suits or  proceedings  pending  or
threatened  against  the  Borrower  before any court or  arbitrator(s)  or by or

                                  Exhibit C-3



before any administrative agency or governmental  authority, in which there is a
reasonable  possibility  of an  adverse  decision  which  could  have a Material
Adverse Effect.

     9. Neither the Borrower  nor any  subsidiary  of the Borrower is a "holding
company," or a "subsidiary company" of a "holding company," or an affiliate of a
"holding  company" or of a "subsidiary  company" of a "holding  company," within
the meaning of the Public Utility Holding Company Act of 1935, as amended.

     The foregoing opinions are subject to the following exceptions, limitations
and qualifications:

     (a)  Our  opinion  is  subject  to the  effect  of  applicable  bankruptcy,
insolvency,   reorganization,   moratorium,  fraudulent  conveyance,  fraudulent
transfer,  marshalling or similar laws affecting  creditors' rights and remedies
generally; the rights of account debtors, claims and defenses of account debtors
and the terms of agreements with account debtors;  general principles of equity,
including  without  limitation,  concepts of materiality,  reasonableness,  good
faith  and  fair  dealing;  and  limitations  on  enforceability  of  rights  to
indemnification   or  contribution  by  federal  or  state  securities  laws  or
regulations or by public policy  (regardless of whether such  enforceability  is
considered in a proceeding in equity or at law).

     (b) We express no opinion as to the  application or requirements of federal
or state securities  (except with respect to the opinion in paragraphs 7 and 9),
patent,  trademark,  copyright,  antitrust  and unfair  competition,  pension or
employee benefit, labor, environmental, health and safety or tax laws in respect
of the transactions contemplated by or referred to in the Loan Documents.

     (c) We have  assumed  (i)  Lenders  have given  value  pursuant to the Loan
Documents;  (ii)  Borrower  has,  or has the  power to  transfer,  rights in the
collateral  described  in the Loan  Documents;  and  (iii) the  descriptions  of
collateral  contained  in, or  attached  as  schedules  to,  the Loan  Documents
sufficiently  describe  the  collateral  intended  to be  covered  by  the  Loan
Documents.  We  express  no  opinion as to the  perfection  or  priority  of the
security interests or mortgage liens granted under the Loan Documents.

     (d) We  express  no opinion as to the  validity  or  enforceability  of any
provision  of the Loan  Documents  which  (i)  permits  Administrative  Agent to
increase  the rate of  interest  or to  collect  a late  charge  in the event of
delinquency or default to the extent deemed to be penalties or forfeitures; (ii)
purports to grant the Administrative  Agent a power of attorney;  (iii) purports
to entitle  Administrative  Agent to take possession of collateral in any manner
other than peaceably and by reason of the peaceable surrender of such possession
by Borrower or by reason of appropriate judicial  proceedings;  (iv) purports to
require that waivers must be in writing to the extent that an oral  agreement or
implied agreement by trade practice or course of conduct modifying provisions of
the Loan Documents has been made; (v) purports to grant the Administrative Agent
the right to confess  judgment for money or in ejectment;  (vi) purports to be a
waiver  of the  right to a jury  trial,  a waiver  of any  right  to  object  to
jurisdiction  or venue,  a waiver of any right to claim damages or to service of
process or a waiver of any  provisions  of Article 9 of the  Uniform  Commercial
Code as in effect in the State of Colorado  that may not be waived,  or a waiver
of any other  rights or benefits  bestowed by  operation of law or the waiver of

                                  Exhibit C-4



which is  limited  by  applicable  law;  (vii)  purports  to be a waiver  of the
obligations  of good faith,  fair dealing,  diligence,  mitigation of damages or
commercial  reasonableness;  (viii) purports to exculpate any party from its own
negligent  acts or limit any party from certain  liabilities;  (ix)  purports to
entitle the Administrative Agent to the appointment of a receiver as a matter of
right;  (x) chooses the governing law of a state other than Colorado  where such
choice of law would conflict with or violate a fundamental  public policy of the
State of Colorado;  (xi) purports to require the payment of  attorneys'  fees to
the extent such fees exceed  reasonable  attorneys'  fees; or (xii)  purports to
authorize the Administrative Agent to set off and apply any deposits at any time
held, and any other  indebtedness at any time owing, by Administrative  Agent to
or for the account of Borrower or Guarantors  or which  purports to provide that
any  purchaser of a  participation  from the  Administrative  Agent may exercise
setoff or similar rights with respect to such participation.

     (e) We  express  no opinion  as to the  enforceability  of forum  selection
clauses upon the courts in the forum selected.

     We  express no  opinion  as to the law of any  jurisdiction  other than the
federal law of the United States, the law of the State of Colorado,  the General
Corporation Law of the State of Delaware,  and solely with regard to the opinion
expressed  in  paragraph  1, the  Montana  Business  Corporation  Act.  The Loan
Documents provide they are governed by the laws of the State of Texas;  however,
our opinion is given as if the laws of the State of Colorado,  without regard to
its conflict of laws provisions, governed the Loan Documents.

     A  copy  of  this  opinion  may be  delivered  by  you  to  each  financial
institution  that may  become a Lender  under  the  Credit  Agreement,  and such
persons may rely on this  opinion as if it were  addressed  to them and had been
delivered to them on the date hereof. This opinion may be relied upon by you and
such  persons  to whom you may  deliver  copies  as  provided  in the  preceding
sentence only in connection with the consummation of the transactions  described
herein  and may not be used or relied  upon by you or any other  person  for any
other purpose, without in each instance our prior written consent.

     This opinion is limited to the matters  expressly stated herein. No implied
opinion  may be inferred to extend  this  opinion  beyond the matters  expressly
stated  herein.  We do not undertake to advise you or anyone else of any changes
in the opinions expressed herein resulting from changes in law, changes in facts
or any other matters that hereafter might occur or be brought to our attention.

                                                     Very truly yours,

                                  Exhibit C-5



                                   EXHIBIT D-1
                              SECURITY INSTRUMENTS

     1.  Amended  and  Restated  Guaranty  Agreement  dated as of April 7, 2005,
executed by each Material Subsidiary in favor of the Administrative Agent.

     2. Amended and Restated Pledge and Security  Agreement dated as of April 7,
2005,  executed by the Borrower in favor of the Administrative  Agent,  covering
the stock of the Material Subsidiaries.

     3.  Financing  Statements  in respect of item 2, by the Borrower  (filed in
connection with January 2003 closing).

     4. Stock Powers delivered in respect of item 2.

     5. Amended and Restated Pledge and Security  Agreement dated as of April 7,
2005,  executed by Nance  Petroleum  Corporation in favor of the  Administrative
Agent, covering the stock of NPC Inc.

     6.  Financing  Statements  in respect of item 5, by the Borrower  (filed in
connection with January 2003 closing).

     7. Stock Powers delivered in respect of item 5.

     8.  Supplement  and  Amendment to Deed of Trust,  Mortgage,  Line of Credit
Mortgage, Assignment, Security Agreement, Fixture Filing and Financing Statement
dated  as of  April  7,  2005,  from the  Borrower  and the  Guarantors,  adding
additional properties.

     9. Deed of Trust, Mortgage, Line of Credit Mortgage,  Assignment,  Security
Agreement,  Fixture  Filing and Financing  Statement  dated as of April 7, 2005,
from the Borrower and the Guarantors, adding additional properties.

     10.  Financing  Statements  in respect  of items 8 and 9 by each  Mortgagor
(filed in connection with January 2003 closing).

                                 Exhibit D-1-1



                                   EXHIBIT D-2


                                     FORM OF

                     AMENDED AND RESTATED GUARANTY AGREEMENT

                                       by

                  ---------------------------------------------

                                   in favor of

                      WACHOVIA BANK, NATIONAL ASSOCIATION,

                             AS ADMINISTRATIVE AGENT

                                  April 7, 2005

                                 Exhibit D-2-1



                                TABLE OF CONTENTS

                                                                            Page

ARTICLE 1 General Terms                                                        2
       Section 1.1    Terms Defined Above                                      2
       Section 1.2    Certain Definitions                                      2
       Section 1.3    Credit Agreement Definitions                             3
ARTICLE 2 The Guaranty                                                         3
       Section 2.1    Liabilities Guaranteed                                   3
       Section 2.2    Nature of Guaranty                                       4
       Section 2.3    Administrative Agent's Rights                            4
       Section 2.4    Guarantor's Waivers.                                     4
       Section 2.5    Maturity of Liabilities; Payment                         5
       Section 2.6    Administrative Agent's Expenses                          5
       Section 2.7    Liability                                                5
       Section 2.8    Events and Circumstances Not Reducing or
                      Discharging Guarantor's Obligations                      5
       Section 2.9    Right of Subrogation and Contribution                    7
ARTICLE 3 Representations and Warranties                                       8
       Section 3.1    By Guarantor                                             8
       Section 3.2    No Representation by Lenders                             8
ARTICLE 4 Subordination of Indebtedness                                        9
       Section 4.1    Subordination of All Guarantor Claims                    9
       Section 4.2    Claims in Bankruptcy                                     9
       Section 4.3    Payments Held in Trust                                   9
       Section 4.4    Liens Subordinate                                        9
       Section 4.5    Notation of Records                                     10
ARTICLE 5 Miscellaneous                                                       10
       Section 5.1    Successors and Assigns                                  10
       Section 5.2    Notices                                                 10
       Section 5.3    Business and Financial Information                      10
       Section 5.4    Choice of Law                                           10
       Section 5.5    Invalidity                                              10
       Section 5.6    Entire Agreement                                        10


                                 Exhibit D-2-2



                     AMENDED AND RESTATED GUARANTY AGREEMENT

     THIS AMENDED AND RESTATED  GUARANTY  AGREEMENT (this "Guaranty  Agreement")
                                                           -------------------
made by the undersigned guarantor (hereinafter called "Guarantor"),  is in favor
of  Wachovia  Bank,   National   Association,   as  Administrative   Agent  (the
"Administrative  Agent") for the lenders (the "Lenders") signatory to the Credit
 ---------------------                         -------
Agreement defined below.

                                R E C I T A L S:

     A. Pursuant to that certain Credit  Agreement dated as of January 27, 2003,
among  St.  Mary  Land  &   Exploration   Company,  a  Delaware  corporation
(hereinafter called the "Borrower"),  the Administrative  Agent, and the lenders
                         --------
party thereto (the "Existing  Lenders") (such Credit  Agreement,  as amended and
                    -----------------
supplemented,  the "Existing Credit  Agreement"),  the Borrower received certain
                    --------------------------
loans and extensions of credit under a revolving  credit facility made available
to the  Borrower  under  the  Existing  Credit  Agreement,  up to the  aggregate
principal amount of $300,000,000.

     B. The Existing Lenders  conditioned  their  obligations under the Existing
Credit  Agreement  upon the  execution and delivery by Guarantor of that certain
Guaranty  Agreement  dated  as of  January  27,  2003  (the  "Existing  Guaranty
                                                              ------------------
Agreement").
- ---------

     C. The Borrower, the Administrative Agent, and the Lenders have amended and
restated the Existing Credit Agreement by entering into that certain Amended and
Restated Credit Agreement dated of even date herewith (as amended,  supplemented
or  otherwise  modified  from time to time,  the "Credit  Agreement"),  whereby,
                                                  -----------------
pursuant to which,  the Lenders have agreed to make certain  loans to and extend
certain credit for the account of the Borrower  subject to the  limitations  set
forth in the Credit Agreement. The initial loans under the Credit Agreement have
been used by the  Borrower  to renew,  rearrange,  modify and extend all amounts
outstanding under the Existing Credit Agreement.

     D.  The  Administrative  Agent  and  the  Lenders  have  conditioned  their
obligations  under the Credit  Agreement  upon the  execution  and  delivery  by
Guarantor of this Amended and Restated  Guaranty  Agreement,  and  Guarantor has
agreed to execute and deliver this Amended and Restated Guaranty Agreement.

     NOW, THEREFORE, (i) in order to comply with the terms and conditions of the
Credit Agreement,  (ii) to induce the Lenders, at any time or from time to time,
to loan  monies  and extend  credit,  with or  without  security,  to or for the
account of Borrower in accordance with the terms of the Credit Agreement,  (iii)
at the special  insistence  and request of the Lenders,  and (iv) for other good
and  valuable  consideration,  the  receipt and  sufficiency  of which is hereby
acknowledged,  Guarantor  and the  Administrative  Agent  hereby  agree that the
Existing  Guaranty  Agreement is hereby  amended and restated in its entirety to
read as follows:

                                 Exhibit D-2-3



                                    ARTICLE 1
                                    ---------
                                  General Terms
                                  -------------

     Section 1.1 Terms  Defined  Above.  As used in this  Amended  and  Restated
                 ---------------------
Guaranty  Agreement,  the  terms  "Administrative  Agent",  "Borrower",  "Credit
Agreement", "Guarantor" and "Lenders" shall have the meanings indicated above.

     Section 1.2 Certain  Definitions.   As used in this  Amended  and  Restated
                 --------------------
Guaranty  Agreement,  the  following  terms shall have the  following  meanings,
unless the context otherwise  requires (terms defined in the singular shall have
the same meanings when used in the plural and vice versa):

     "Contribution  Obligation" shall mean an amount equal, at any time and from
      ------------------------
time to time and for each respective Subsidiary Guarantor, to the product of (i)
its Contribution  Percentage times (ii) the sum of all payments made previous to
or at the time of  calculation  by all  Subsidiary  Guarantors in respect of the
Liabilities,  as a Subsidiary  Guarantor  (less the amount of any such  payments
previously  returned  to  any  Subsidiary  Guarantor  by  operation  of  law  or
otherwise,  but not including  payments received by any Subsidiary  Guarantor by
way of its rights of subrogation and contribution under Section 2.9 of any other
Guaranty Agreements);  provided,  however, such Contribution  Obligation for any
Subsidiary  Guarantor  shall  in no event  exceed  such  Subsidiary  Guarantor's
Maximum  Guaranteed  Amount, as defined in the respective  Guaranty Agreement of
such Subsidiary Guarantor.

     "Contribution  Percentage" shall mean for any Subsidiary  Guarantor for any
      ------------------------
applicable date as of which such percentage is being determined, an amount equal
to the  quotient of (i) the Net Worth of such  Subsidiary  Guarantor  as of such
date, divided by (ii) the sum of the Net Worth of all the Subsidiary  Guarantors
as of such date.

     "Guarantor Claims" shall have the meaning indicated in Section 4.1 hereof.
      ----------------
     "Guaranty   Agreement"  shall  mean  this  Amended  and  Restated  Guaranty
      --------------------
Agreement, and where the context indicates, the "Guaranty Agreement" (as defined
in the Credit Agreement) of any other Subsidiary Guarantor, as the same may from
time to time be amended, modified or supplemented.

     "Liabilities"  shall  mean (a) any and all  Indebtedness,  obligations  and
      -----------
liabilities of the Borrower  pursuant to the Credit Agreement and any other Loan
Document,  including without limitation, the unpaid principal of and interest on
the Notes,  including without  limitation,  interest accruing  subsequent to the
filing of a petition or other  action  concerning  bankruptcy  or other  similar
proceeding;  (b) any additional  loans made by the Lenders to the Borrower;  (c)
payment of and  performance of any and all present or future  obligations of the
Borrower to any Lender or any Affiliate of such Lender under any Swap  Agreement
between the Borrower and any Lender or any Affiliate of such Lender; (d) any and
all other indebtedness,  obligations and liabilities of any kind of the Borrower
to the Lenders, now or hereafter existing, arising directly between the Borrower
and the Lenders or acquired  outright,  as a participation,  conditionally or as
collateral security from another by the Lenders,  absolute or contingent,  joint
and/or several,  secured or unsecured,  due or not due,  arising by operation of
law or otherwise, or direct or indirect, including indebtedness, obligations and
liabilities  to the  Lenders  of the  Borrower  as a member of any  partnership,

                                 Exhibit D-2-4



syndicate,  association or other group,  and whether incurred by the Borrower as
principal,  surety, endorser,  guarantor,  accommodation party or otherwise; and
(e)  all  renewals,  rearrangements,   increases,  extensions  for  any  period,
replacements,  amendments or supplements in whole or in part of the Notes or any
documents evidencing the above

     "Maximum  Guaranteed Amount" shall mean, for the Guarantor,  the greater of
      --------------------------
(i) the "reasonably  equivalent  value" or "fair  consideration"  (or equivalent
concept)  received by the  Guarantor  in exchange  for the  obligation  incurred
hereunder,  within the  meaning of any  applicable  state or federal  fraudulent
conveyance or transfer  laws; or (ii) the lesser of (A) the maximum  amount that
will not render the Guarantor insolvent, or (B) the maximum amount that will not
leave the Guarantor  with any property  deemed an  unreasonably  small  capital.
Clauses  (A) and  (B) are and  shall  be  determined  pursuant  to and as of the
appropriate  date  mandated  by such  applicable  state  or  federal  fraudulent
conveyance or transfer  laws and to the extent  allowed by law take into account
the rights to contribution  and  subrogation  under Section 2.9 in each Guaranty
Agreement so as to provide for the largest Maximum Guaranteed Amount possible.

     "Net  Payments"  shall mean an amount  equal,  at any time and from time to
      -------------
time and for each respective Subsidiary Guarantor,  to the difference of (i) the
sum of all  payments  made  previous  to or at the time of  calculation  by such
Subsidiary Guarantor in respect of the Liabilities,  as a Subsidiary  Guarantor,
and in respect of its  obligations  contained in this Guaranty  Agreement,  less
(ii)  the sum of all  such  payments  previously  returned  to  such  Subsidiary
Guarantor by operation of law or otherwise  and including  payments  received by
such Subsidiary  Guarantor by way of its rights of subrogation and  contribution
under Section 2.9 of any other Guaranty Agreements.

     "Net  Worth"  shall  mean  for  any  Subsidiary  Guarantor,  determined  in
      ----------
accordance  with GAAP and calculated on and as of any  applicable  date on which
such amount is being determined,  the difference between (i) the sum of all such
Subsidiary  Guarantor's property, at a fair valuation and as of such date, minus
(ii) the sum of all such Subsidiary  Guarantor's  debts, at a fair valuation and
as of such date, excluding the Liabilities.

     "Subsidiary  Guarantors" shall mean the Subsidiaries or other Persons party
      ----------------------
to a Guaranty Agreement, including the Guarantor.

     Section 1.3 Credit Agreement Definitions.  Unless otherwise defined herein,
                 ----------------------------
all terms  beginning  with a capital  letter  which are  defined  in the  Credit
Agreement shall have the same meanings herein as therein.

                                    ARTICLE 2
                                    ---------
                                  The Guaranty
                                  ------------

     Section 2.1 Liabilities  Guaranteed.  Guarantor   hereby   irrevocably  and
                 -----------------------
unconditionally  guarantees  the  prompt  payment of the  Liabilities  when due,
whether at maturity  or  otherwise;  provided,  however,  that,  notwithstanding
anything  herein or in any other Loan  Document  to the  contrary,  the  maximum
liability of Guarantor hereunder shall in no event exceed the Maximum Guaranteed
Amount.

                                 Exhibit D-2-5




     Section 2.2 Nature of  Guaranty.  This  Guaranty  Agreement is an absolute,
                 -------------------
irrevocable,  completed and continuing guaranty of payment and not a guaranty of
collection,  and no notice of the Liabilities or any extension of credit already
or hereafter  contracted  by or extended to Borrower need be given to Guarantor.
This Guaranty Agreement may not be revoked by Guarantor and shall continue to be
effective  with respect to debt under the  Liabilities  arising or created after
any attempted  revocation by Guarantor and shall remain in full force and effect
until  the  Liabilities  are paid in full and the  Commitments  are  terminated,
notwithstanding  that from time to time  prior  thereto  no  Liabilities  may be
outstanding.  Borrower and the Lenders may modify, alter, rearrange,  extend for
any period and/or renew from time to time, the Liabilities,  and the Lenders may
waive any Default or Events of Default  without  notice to the  Guarantor and in
such event Guarantor will remain fully bound hereunder on the Liabilities.  This
Guaranty Agreement shall continue to be effective or be reinstated,  as the case
may be, if at any time any  payment  of the  Liabilities  is  rescinded  or must
otherwise be returned by any of the Lenders upon the  insolvency,  bankruptcy or
reorganization of Borrower or otherwise, all as though such payment had not been
made. This Guaranty  Agreement may be enforced by the  Administrative  Agent and
any subsequent  holder of any of the  Liabilities and shall not be discharged by
the  assignment  or  negotiation  of all or part of the  Liabilities.  Guarantor
hereby expressly waives presentment,  demand, notice of non-payment, protest and
notice of protest and dishonor, notice of Default or Event of Default, notice of
intent to accelerate the maturity and notice of acceleration of the maturity and
any  other  notice  in  connection  with the  Liabilities,  and also  notice  of
acceptance  of this  Guaranty  Agreement,  acceptance on the part of the Lenders
being conclusively  presumed by the Lenders' request for this Guaranty Agreement
and delivery of the same to the Administrative Agent.

     Section 2.3 Administrative  Agent's  Rights.    Guarantor   authorizes  the
                 -------------------------------
Administrative Agent, without notice or demand and without affecting Guarantor's
liability  hereunder,  to obtain a guaranty of the  Liabilities  from any one or
more  Persons and at any time or times to  enforce,  waive,  rearrange,  modify,
limit or release any of such other  Persons  from their  obligations  under such
guaranties.

     Section 2.4 Guarantor's Waivers.
                 -------------------

              (a) General.   Guarantor  waives any right to  require  any of the
                  -------
Lenders  to (i)  proceed  against  Borrower  or any other  person  liable on the
Liabilities, (ii) enforce any of their rights against any other guarantor of the
Liabilities including but not limited to the Subsidiary Guarantors (iii) proceed
or enforce any of their rights  against or exhaust any security  given to secure
the Liabilities (iv) have Borrower joined with Guarantor in any suit arising out
of this  Guaranty  Agreement  and/or  the  Liabilities,  or (v) pursue any other
remedy in the Lenders' powers  whatsoever.  The Lenders shall not be required to
mitigate  damages  or  take  any  action  to  reduce,  collect  or  enforce  the
Liabilities.  Guarantor  waives any defense arising by reason of any disability,
lack of corporate  authority or power, or other defense of Borrower or any other
guarantor of the  Liabilities,  and shall remain  liable  hereon  regardless  of
whether  Borrower  or any other  guarantor  be found not liable  thereon for any
reason.  Whether and when to exercise any of the  remedies of the Lenders  under
any of the Loan  Documents  shall be in the sole and absolute  discretion of the
Administrative  Agent, and no delay by the Administrative Agent in enforcing any
remedy,  including delay in conducting a foreclosure sale, shall be a defense to
the Guarantor's  liability under this Guaranty Agreement.  To the extent allowed
by applicable  law, the Guarantor  hereby waives any good faith duty on the part

                                 Exhibit D-2-6



of the  Administrative  Agent in  exercising  any remedies  provided in the Loan
Documents.

              (b) Subrogation. Until the Liabilities have been paid in full, the
                  -----------
Guarantor  waives  all  rights  of  subrogation  or  reimbursement  against  the
Borrower,  whether arising by contract or operation of law  (including,  without
limitation,  any such right  arising  under any federal or state  bankruptcy  or
insolvency  laws) and waives any right to enforce  any remedy  which the Lenders
now have or may hereafter  have against the Borrower,  and waives any benefit or
any  right  to  participate  in  any  security  now  or  hereafter  held  by the
Administrative Agent or any Lender.

     Section 2.5 Maturity of Liabilities;  Payment. Guarantor agrees that if the
                 ---------------------------------
maturity of any of the  Liabilities  is  accelerated by bankruptcy or otherwise,
such maturity shall also be deemed  accelerated for the purpose of this Guaranty
Agreement without demand or notice to Guarantor.  Guarantor will, forthwith upon
notice from the Administrative Agent, pay to the Administrative Agent the amount
due  and  unpaid  by  Borrower  and  guaranteed   hereby.  The  failure  of  the
Administrative  Agent to give this notice shall not in any way release Guarantor
hereunder.

     Section 2.6 Administrative  Agent's Expenses. If Guarantor fails to pay the
                 --------------------------------
Liabilities after notice from the Administrative  Agent of Borrower's failure to
pay any  Liabilities  when due,  and if the  Administrative  Agent  obtains  the
services of an attorney for collection of amounts owing by Guarantor  hereunder,
or  obtaining  advice of  counsel  in  respect  of any  aspect of this  Guaranty
Agreement,  or if suit is  filed  to  enforce  this  Guaranty  Agreement,  or if
proceedings are had in any bankruptcy,  probate,  receivership or other judicial
proceedings for the establishment or collection of any amount owing by Guarantor
hereunder,  or if any amount owing by Guarantor  hereunder is collected  through
such  proceedings,  Guarantor  agrees  to pay to the  Administrative  Agent  the
Administrative Agent's reasonable attorneys' fees.

     Section 2.7 Liability.  It  is expressly  agreed that the  liability of the
                 ---------
Guarantor for the payment of the Liabilities  guaranteed hereby shall be primary
and not secondary.

     Section 2.8 Events   and   Circumstances   Not   Reducing  or   Discharging
                 ---------------------------------------------------------------
Guarantor's  Obligations.  Guarantor  hereby  consents and agrees to each of the
- ------------------------
following to the fullest  extent  permitted by law, and agrees that  Guarantor's
obligations  under this Guaranty  Agreement  shall not be released,  diminished,
impaired,  reduced or adversely affected by any of the following, and waives any
rights  (including  without  limitation  rights to notice) which Guarantor might
otherwise have as a result of or in connection with any of the following:

              (a) Modifications,  etc.   Any renewal,  extension,  modification,
                 --------------------
increase,  decrease,  alteration  or  rearrangement  of all or any  part  of the
Liabilities,  or of the Notes,  any Loan Document or the Credit Agreement or any
instrument  executed in connection  therewith,  or any contract or understanding
between Borrower and any of the Lenders, or any other Person,  pertaining to the
Liabilities.

                                 Exhibit D-2-7




              (b) Adjustment,  etc. Any adjustment,  indulgence,  forbearance or
                  ----------------
compromise  that might be granted or given by any of the  Lenders to Borrower or
Guarantor or any Person liable on the Liabilities.

              (c) Condition of Borrower or Guarantor. The insolvency, bankruptcy
                  ----------------------------------
arrangement,  adjustment,  composition,  liquidation,  disability,  dissolution,
death or lack of power of Borrower or  Guarantor or any other Person at any time
liable for the payment of all or part of the Liabilities;  or any dissolution of
Borrower  or  Guarantor,  or any sale,  lease or  transfer  of any or all of the
assets of Borrower or Guarantor,  or any changes in the shareholders,  partners,
or members of  Borrower  or  Guarantor;  or any  reorganization  of  Borrower or
Guarantor.

              (d) Invalidity  of  Liabilities.  The   invalidity,  illegality or
                  ---------------------------
unenforceability  of all or any  part of the  Liabilities,  or any  document  or
agreement   executed  in  connection  with  the  Liabilities,   for  any  reason
whatsoever,  including without limitation the fact that the Liabilities,  or any
part  thereof,  exceed the amount  permitted  by law,  the act of  creating  the
Liabilities or any part thereof is ultra vires, the officers or  representatives
executing the documents or otherwise creating the Liabilities acted in excess of
their authority, the Liabilities violate applicable usury laws, the Borrower has
valid  defenses,  claims or offsets  (whether at law, in equity or by agreement)
which render the Liabilities  wholly or partially  uncollectible  from Borrower,
the creation,  performance  or repayment of the  Liabilities  (or the execution,
delivery and performance of any document or instrument  representing part of the
Liabilities or executed in connection with the  Liabilities,  or given to secure
the repayment of the Liabilities) is illegal, uncollectible,  legally impossible
or  unenforceable,  or the Credit  Agreement or other  documents or  instruments
pertaining to the Liabilities have been forged or otherwise are irregular or not
genuine or authentic.

              (e) Release  of  Obligors.  Any  full or  partial  release  of the
                  ---------------------
liability  of  Borrower  on  the  Liabilities  or  any  part  thereof,   of  any
co-guarantors,  or any other Person now or hereafter liable, whether directly or
indirectly,  jointly,  severally,  or jointly and  severally,  to pay,  perform,
guarantee or assure the payment of the Liabilities or any part thereof, it being
recognized,  acknowledged and agreed by Guarantor that Guarantor may be required
to pay the  Liabilities  in full  without  assistance  or  support  of any other
Person, and Guarantor has not been induced to enter into this Guaranty Agreement
on the basis of a contemplation,  belief,  understanding or agreement that other
parties  other than the Borrower will be liable to perform the  Liabilities,  or
the Lenders will look to other parties to perform the Liabilities.

              (f) Other Security. The taking or accepting of any other security,
                  --------------
collateral or guaranty,  or other  assurance of payment,  for all or any part of
the Liabilities.

              (g) Release of Collateral, etc. Any release, surrender,  exchange,
                  --------------------------
subordination,  deterioration,  waste,  loss or  impairment  (including  without
limitation negligent,  willful, unreasonable or unjustifiable impairment) of any
collateral,  property or security,  at any time existing in connection  with, or
assuring or securing payment of, all or any part of the Liabilities.

              (h) Care and  Diligence.  The  failure of the Lenders or any other
                  -------------------
Person to exercise diligence or reasonable care in the preservation, protection,
enforcement,  sale or other  handling  or  treatment  of all or any part of such

                                 Exhibit D-2-8



collateral, property or security; provided, however, that Lenders shall act in a
"commercially reasonable" manner as required by applicable provisions of Article
9 of the Uniform  Commercial  Code as  presently in effect in the State of Texas
when exercising their rights under that certain Pledge and Security Agreement by
and between Borrower and Administrative Agent of even date herewith.

              (i) Status of  Liens.   The fact  that any  collateral,  security,
                  ----------------
security  interest or lien  contemplated  or  intended  to be given,  created or
granted as security for the repayment of the  Liabilities  shall not be properly
perfected or created,  or shall prove to be  unenforceable or subordinate to any
other  security  interest or lien, it being  recognized  and agreed by Guarantor
that  Guarantor is not entering into this Guaranty  Agreement in reliance on, or
in   contemplation   of  the   benefits   of,  the   validity,   enforceability,
collectability or value of any of the collateral for the Liabilities.

              (j) Payments Rescinded.  Any payment by Borrower to the Lenders is
                  ------------------
held to constitute a preference under the bankruptcy laws, or for any reason the
Lenders are  required  to refund such  payment or pay such amount to Borrower or
someone else.

              (k) Other  Actions  Taken or Omitted.  Any other  action  taken or
                  --------------------------------
omitted to be taken with respect to the Credit  Agreement,  the Liabilities,  or
the security  and  collateral  therefor,  whether or not such action or omission
prejudices Guarantor or increases the likelihood that Guarantor will be required
to pay the  Liabilities  pursuant to the terms hereof;  it being the unambiguous
and unequivocal  intention of Guarantor that Guarantor shall be obligated to pay
the Liabilities when due, notwithstanding any occurrence,  circumstance,  event,
action, or omission  whatsoever,  whether  contemplated or  uncontemplated,  and
whether or not otherwise or particularly  described herein,  except for the full
and final payment and satisfaction of the Liabilities.

     Section 2.9 Right of Subrogation  and  Contribution.  If Guarantor  makes a
                 ---------------------------------------
payment in respect of the  Liabilities,  it shall be subrogated to the rights of
the Lenders against the Borrower with respect to such payment and shall have the
rights of  contribution  against the other  Subsidiary  Guarantors  set forth in
Section 2.9 of any other Guaranty Agreements;  provided that Guarantor shall not
enforce its rights to any payment by way of  subrogation  or by  exercising  its
rights of  contribution  or  reimbursement  or the right to  participate  in any
security now or hereafter held by or for the benefit of the Lenders until all of
the Liabilities  have been paid in full. The Guarantor agrees that after all the
Liabilities  have been paid in full if its then  current Net  Payments  are less
than the amount of its then current Contribution Obligation, Guarantor shall pay
to any  other  Subsidiary  Guarantors  an  amount  (together  with any  payments
required  of the  other  Subsidiary  Guarantors  by  Section  2.9 of each  other
Guaranty Agreement) such that the Net Payments made by all Subsidiary Guarantors
in  respect  of the  Liabilities  shall be shared  among  all of the  Subsidiary
Guarantors in a proportion  equal to their respective  Contribution  Percentage;
provided,  however, Guarantor need not make any such payment if at the time such
payment is to be made Guarantor is illiquid and not making such payment will not
render any other Subsidiary Guarantor insolvent.

                                 Exhibit D-2-9



                                    ARTICLE 3
                                    ---------
                         Representations and Warranties
                         ------------------------------

     Section  3.1 By  Guarantor.  In order to induce the  Lenders to accept this
                  -------------
Guaranty  Agreement,  Guarantor  represents  and warrants to the Lenders  (which
representations  and warranties will survive the creation of the Liabilities and
any extension of credit thereunder) that:

              (a) Benefit to Guarantor.  Guarantor's  guaranty  pursuant to this
                  --------------------
Guaranty  Agreement   reasonably  may  be  expected  to  benefit,   directly  or
indirectly, Guarantor.

              (b) Existence.  Guarantor is a corporation duly organized, validly
                  ---------
existing and in good standing under the laws of the State of Montana.

              (c) Power and  Authorization.  Guarantor  is duly  authorized  and
                  ------------------------
empowered  to execute,  deliver  and perform  this  Guaranty  Agreement  and all
necessary action on Guarantor's  part requisite for the due execution,  delivery
and performance of this Guaranty Agreement has been duly and effectively taken.

              (d) Binding Obligations. This Guaranty Agreement constitutes valid
                  -------------------
and binding obligations of Guarantor,  enforceable in accordance with its terms,
subject to  applicable  bankruptcy,  insolvency,  reorganization,  moratorium or
other  laws  affecting  creditors'  rights  generally  and  subject  to  general
principals of equity, regardless of whether considered in a proceeding in equity
or at law.

              (e) Governmental Approvals; No Conflicts.  This Guaranty Agreement
                  ------------------------------------
(a) does not require any consent or approval of, registration or filing with, or
any other  action  by,  any  Governmental  Authority,  except  such as have been
obtained  or made and are in full force and  effect,  (b) will not  violate  any
applicable  law or  regulation or the charter,  by-laws or other  organizational
documents of the Guarantor or any order of any Governmental Authority,  (c) will
not  violate  or result in a default  under any  indenture,  agreement  or other
instrument  binding upon the  Guarantor  or its assets,  or give rise to a right
thereunder to require any payment to be made by the Guarantor,  and (d) will not
result in the creation or imposition of any Lien on any asset of the Guarantor.

              (f) Solvency.  The Guarantor hereby  represents that (i) it is not
                  --------
insolvent  as of the date hereof and will not be rendered  insolvent as a result
of  this  Guaranty  Agreement,  (ii)  it  is  not  engaged  in a  business  or a
transaction,  or about to engage in a business or a  transaction,  for which any
property or assets  remaining  with such  Guarantor  thereafter is  unreasonably
small capital,  and (iii) it does not intend to incur, or believe it will incur,
debts that will be beyond its ability to pay as such debts mature.

     Section 3.2 No Representation by Lenders. Neither the Lenders nor any other
                 ----------------------------
Person has made any  representation,  warranty or statement to the  Guarantor in
order to induce the Guarantor to execute this Guaranty Agreement.

                                 Exhibit D-2-10



                                    ARTICLE 4
                                    ---------
                          Subordination of Indebtedness
                          -----------------------------

     Section 4.1 Subordination of All Guarantor Claims. As used herein, the term
                 -------------------------------------
"Guarantor  Claims"  shall  mean  all  debts  and  liabilities  of  Borrower  to
Guarantor,  whether  such  debts  and  liabilities  now  exist or are  hereafter
incurred or arise,  or whether  the  obligation  of Borrower  thereon be direct,
contingent,  primary,  secondary,  several, joint and several, or otherwise, and
irrespective  of  whether  such  debts  or  liabilities  be  evidenced  by note,
contract, open account, or otherwise,  and irrespective of the person or persons
in whose favor such debts or liabilities may, at their inception,  have been, or
may hereafter be created, or the manner in which they have been or may hereafter
be acquired by Guarantor.  The Guarantor Claims shall include without limitation
all rights  and  claims of  Guarantor  against  Borrower  arising as a result of
subrogation or otherwise as a result of Guarantor's  payment of all or a portion
of the  Liabilities.  During the continuance of any Event of Default,  Guarantor
shall not receive or collect, directly or indirectly, from Borrower or any other
party any amount upon the Guarantor Claims.

     Section 4.2 Claims in Bankruptcy. In the event of receivership, bankruptcy,
                 --------------------
reorganization,  arrangement,  debtor's relief, or other insolvency  proceedings
involving  Borrower as debtor,  the Lenders  shall have the right to prove their
claim in any proceeding,  so as to establish their rights  hereunder and receive
directly  from the  receiver,  trustee or other court  custodian,  dividends and
payments which would otherwise be payable upon Guarantor  Claims. In such event,
Guarantor hereby assigns such dividends and payments to the Lenders.  Should the
Administrative   Agent  or  any  Lender  receive,   for  application   upon  the
Liabilities,  any such  dividend  or  payment  which  is  otherwise  payable  to
Guarantor,  and which,  as between  Borrower and Guarantor,  shall  constitute a
credit upon the Guarantor Claims,  then upon payment in full of the Liabilities,
Guarantor  shall  become  subrogated  to the rights of the Lenders to the extent
that such  payments to the  Lenders on the  Guarantor  Claims  have  contributed
toward the liquidation of the Liabilities,  and such  subrogation  shall be with
respect to that portion of the  Liabilities  which would have been unpaid if the
Administrative Agent or a Lender had not received dividends or payments upon the
Guarantor Claims.

     Section 4.3 Payments  Held in Trust.  In  the  event  that  notwithstanding
                 -----------------------
Sections 4.1 and 4.2 above, Guarantor should receive any funds, payments, claims
or distributions which is prohibited by such Sections,  Guarantor agrees to hold
in trust for the Lenders an amount  equal to the amount of all funds,  payments,
claims or distributions so received, and agrees that it shall have absolutely no
dominion over the amount of such funds, payments, claims or distributions except
to pay them  promptly  to the  Administrative  Agent,  and  Guarantor  covenants
promptly to pay the same to the Administrative Agent.

     Section 4.4 Liens  Subordinate.  Guarantor agrees that any liens,  security
                 ------------------
interests,  judgment liens, charges or other encumbrances upon Borrower's assets
securing  payment  of the  Guarantor  Claims  shall be and remain  inferior  and
subordinate to any liens,  security interests,  judgment liens, charges or other
encumbrances  upon  Borrower's  assets  securing  payment  of  the  Liabilities,
regardless   of  whether  such   encumbrances   in  favor  of   Guarantor,   the
Administrative  Agent or the Lenders presently exist or are hereafter created or
attach.  Without the prior written  consent of the Lenders,  Guarantor shall not
(a) exercise or enforce any  creditor's  right it may have against the Borrower,
or (b) foreclose,  repossess, sequester or otherwise take steps or institute any

                                 Exhibit D-2-11



action or proceeding  (judicial or otherwise,  including without  limitation the
commencement  of or  joinder  in  any  liquidation,  bankruptcy,  rearrangement,
debtor's relief or insolvency proceeding) to enforce any lien, mortgages,  deeds
of trust, security interest,  collateral rights, judgments or other encumbrances
on assets of Borrower held by Guarantor.

     Section 4.5 Notation of Records. All promissory notes, or other instruments
                 -------------------
evidencing the Guarantor  Claims accepted by or held by Guarantor (if any) shall
contain a  specific  written  notice  thereon  that the  indebtedness  evidenced
thereby is subordinated under the terms of this Guaranty Agreement.

                                    ARTICLE 5
                                    ---------
                                  Miscellaneous
                                  -------------

     Section 5.1 Successors and Assigns. This Guaranty Agreement is and shall be
                 ----------------------
in every  particular  available to the successors and assigns of the Lenders and
is and shall  always be fully  binding  upon the legal  representatives,  heirs,
successors  and assigns of  Guarantor,  notwithstanding  that some or all of the
monies, the repayment of which this Guaranty Agreement applies,  may be actually
advanced after any bankruptcy, receivership,  reorganization,  death, disability
or other event affecting Guarantor.

     Section 5.2 Notices.  Any   notice  or  demand   to  Guarantor  under or in
                 -------
connection with this Guaranty  Agreement may be given and shall  conclusively be
deemed and considered to have been given and received in accordance with Section
12.02 of the Credit  Agreement,  addressed  to  Guarantor  at the address on the
signature  page hereof or at such other address  provided to the  Administrative
Agent in writing.

     Section 5.3 Business and Financial Information. The Guarantor will promptly
                 ----------------------------------
furnish  to the  Administrative  Agent  and the  Lenders  from time to time upon
request  such  information  regarding  the  business  and affairs and  financial
condition of the Guarantor and its subsidiaries as the Administrative  Agent and
the Lenders may reasonably request.

     Section 5.4 Choice of Law.  This  Guaranty  Agreement  (including,  but not
                 -------------
limited to, the validity and  enforceability  hereof)  shall be governed by, and
construed in accordance with, the laws of the State of Texas.

     Section 5.5 Invalidity. In the event that any one or more of the provisions
                 ----------
contained in this Guaranty  Agreement  shall,  for any reason,  be held invalid,
illegal  or  unenforceable  in  any  respect,  such  invalidity,  illegality  or
unenforceability   shall  not  affect  any  other  provision  of  this  Guaranty
Agreement.

     Section 5.6 ENTIRE AGREEMENT.  THS WRITTEN GUARANTY  AGREEMENT EMBODIES THE
                 ----------------
ENTIRE  AGREEMENT  AND  UNDERSTANDING  BETWEEN THE LENDERS AND THE GUARANTOR AND
SUPERCEDES ALL OTHER AGREEMENTS AND UNDERSTANDINGS BETWEEN SUCH PARTIES RELATING
TO THE SUBJECT  MATTER  HEREOF AND  THEREOF.  THIS  WRITTEN  GUARANTY  AGREEMENT
REPRESENTS THE FINAL  AGREEMENT  BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED

                                 Exhibit D-2-12



BY EVIDENCE OF PRIOR,  CONTEMPORANEOUS,  OR  SUBSEQUENT  ORAL  AGREEMENTS OF THE
PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.







                         [SIGNATURES BEGIN ON NEXT PAGE]


                                 Exhibit D-2-13





     WITNESS THE EXECUTION HEREOF, effective as of the 7th day of April, 2005.

GUARANTOR:              _____________________________________________
- ---------


                        By:   _______________________________________
                              David W. Honeyfield
                              Vice President - Finance



                        Address: _______________________
                                 _______________________


                                       with copy to:

                                 1776 Lincoln Street, Suite 700
                                 Denver, CO  80203





ADMINISTRATIVE AGENT:   WACHOVIA BANK, NATIONAL
                        ASSOCIATION, as Administrative Agent



                        By:   _______________________________________
                        Name: Philip J. Trinder
                        Title:Vice President



                                 Exhibit D-2-14





                                   EXHIBIT D-3














- --------------------------------------------------------------------------------

                                     FORM OF

               AMENDED AND RESTATED PLEDGE AND SECURITY AGREEMENT

                                     Between

                    ST. MARY LAND & EXPLORATION COMPANY,

                                   as Pledgor

                                       and

          WACHOVIA BANK, NATIONAL ASSOCIATION, as Administrative Agent,

                                as Secured Party

                          Effective as of April 7, 2005

- --------------------------------------------------------------------------------



                                 Exhibit D-3-1



               AMENDED AND RESTATED PLEDGE AND SECURITY AGREEMENT
               --------------------------------------------------

     THIS AMENDED AND RESTATED  PLEDGE AND SECURITY  AGREEMENT is made effective
as of April 7, 2005,  by ST.  MARY LAND &  EXPLORATION  COMPANY,  a Delaware
corporation  with principal  offices at 1776 Lincoln Street,  Suite 700, Denver,
Colorado 80203 ("Pledgor"),  in favor of WACHOVIA BANK, NATIONAL ASSOCIATION,  a
national  banking   association  with  offices  at  301  South  College  Street,
Charlotte,  North Carolina 28288, as Administrative Agent (in such capacity, the
"Secured Party") for the benefit of the several lenders now or hereafter parties
to the  hereinafter  defined  Credit  Agreement  (individually,  a "Lender"  and
collectively, the "Lenders").

                                    RECITALS

     A. Pursuant to that certain Credit  Agreement dated as of January 27, 2003,
among  Pledgor,  Secured  Party and the lenders  party  thereto  (the  "Existing
Lenders") (such Credit  Agreement,  as amended and  supplemented,  the "Existing
Credit  Agreement"),  Pledgor  received  certain loans and  extensions of credit
under a revolving  credit  facility made available to Pledgor under the Existing
Credit Agreement, up to the aggregate principal amount of $300,000,000.

     B. The Existing Lenders  conditioned  their  obligations under the Existing
Credit  Agreement  upon the  execution  and  delivery by Pledgor of that certain
Pledge and Security Agreement dated as of January 27, 2003 (the "Existing Pledge
and Security Agreement").

     C.  Pledgor,  Secured  Party and the Lenders  have amended and restated the
Existing  Credit  Agreement by entering  into that certain  Amended and Restated
Credit  Agreement  dated of even date  herewith  (as  amended,  supplemented  or
otherwise modified from time to time, the "Credit Agreement"), whereby, pursuant
to which,  the Lenders have agreed to make certain  loans to and extend  certain
credit for the account of Pledgor  subject to the  limitations  set forth in the
Credit Agreement. The initial loans under the Credit Agreement have been used by
Pledgor to renew, rearrange, modify and extend all amounts outstanding under the
Existing Credit Agreement.

     D. The Secured  Party and the Lenders have  conditioned  their  obligations
under the Credit  Agreement  upon the  execution and delivery by Pledgor of this
Amended and Restated  Pledge and Security  Agreement,  and Pledgor has agreed to
execute and deliver this Amended and Restated Pledge and Security Agreement.

     NOW, THEREFORE, (i) in order to comply with the terms and conditions of the
Credit Agreement,  (ii) to induce the Lenders, at any time or from time to time,
to loan  monies  and extend  credit,  with or  without  security,  to or for the
account of Pledgor in accordance with the terms of the Credit  Agreement,  (iii)
at the special  insistence  and request of the Lenders,  and (iv) for other good
and  valuable  consideration,  the  receipt and  sufficiency  of which is hereby
acknowledged,  Pledgor and Secured  Party hereby agree that the Existing  Pledge
and Security Agreement is hereby amended and restated in its entirety to read as
follows:

                                    ARTICLE 1

                                SECURITY INTEREST
                                -----------------

                                 Exhibit D-3-2



     Section 1.01 Pledge. Pledgor hereby pledges,  assigns and grants to Secured
                  ------
Party a security interest in and right of set-off against the assets referred to
in Section 1.02 (the  "Collateral") to secure the prompt payment and performance
of the "Obligations" (as defined in Section 2.02) and the performance by Pledgor
of this Amended and Restated Pledge and Security Agreement.

     Section 1.02 Collateral.  The Collateral consists of the following types or
                  ----------
items of property which are owned by Pledgor:

          (a) The  securities  described  or  referred  to in Exhibit A attached
     hereto and made a part hereof.

          (b) (i) The  certificates or instruments,  if any,  representing  such
     membership  interests and such units,  (ii) all dividends  (cash,  stock or
     otherwise),  cash, instruments,  rights to subscribe,  purchase or sell and
     all other rights and property  from time to time  received,  receivable  or
     otherwise  distributed  in respect of or in exchange for any or all of such
     membership   interests   or  such  units,   (iii)  all   replacements   and
     substitutions  for any of the property  referred to in this  Section  1.02,
     including,  without limitation,  claims against third parties, and (iv) the
     proceeds,  interest,  profits and other income of or on any of the property
     referred to in this Section 1.02.

It is expressly  contemplated  that additional  securities or other property may
from time to time be pledged, assigned or granted to Secured Party as additional
security for the Obligations,  and the term "Collateral" as used herein shall be
deemed  for all  purposes  hereof  to  include  all such  additional  membership
interests,  units and property,  together  with all other  property of the types
described above related thereto.

     Section 1.03 Transfer of  Collateral.  All   certificates  or   instruments
                  -----------------------
representing or evidencing the Pledged Securities shall be delivered to and held
pursuant  hereto by Secured  Party or a Person  designated  by Secured Party and
shall be in suitable form for transfer by delivery,  or shall be  accompanied by
duly executed instruments of transfer or assignment in blank, or (in the case of
either certificated or uncertificated  securities) Secured Party shall have been
provided with evidence that the Pledged Securities have been otherwise delivered
to Secured Party in accordance  with Section 8.301 of the Code,  all in form and
substance satisfactory to Secured Party. Notwithstanding the preceding sentence,
at Secured  Party's  discretion,  all Pledged  Securities  must be  delivered or
transferred in such manner as to permit  Secured Party to meet the  requirements
of  Section  8.303(a)(3)  of the Code to the  extent of its  security  interest.
Secured Party shall have the right,  at any time in its  discretion  and without
notice to Pledgor, to transfer to or to register in the name of Secured Party or
any of its  nominees any or all of the Pledged  Securities,  subject only to the
revocable  rights  specified in Section 4.02.  In addition,  Secured Party shall
have the right at any time to exchange certificates or instruments  representing
or evidencing  Pledged  Securities for certificates or instruments of smaller or
larger denominations.

                                 Exhibit D-3-3



                                    ARTICLE 2

                                   DEFINITIONS
                                   -----------

     Section 2.01 Terms  Defined  Above.  As  used in this  Amended and Restated
                  ---------------------
Pledge and Security  Agreement,  the terms defined above shall have the meanings
respectively assigned to them.

     Section 2.01 Certain  Definitions.  As  used  in this  Amended and Restated
                  --------------------
Pledge and Security  Agreement,  the  following  terms shall have the  following
meanings, unless the context otherwise requires:

     "Agreement" means this Amended and Restated Pledge and Security  Agreement,
      ---------
as the  same  may  from  time to  time be  amended,  supplemented  or  otherwise
modified.

     "Code"  means the Uniform  Commercial  Code as  presently  in effect in the
      ----
State of Texas,  Articles 1 through 9. Unless otherwise indicated by the context
herein,  all uncapitalized  terms which are defined in the Code shall have their
respective meanings as used in Articles 8 and 9 of the Code.

     "Event of Default" means any event specified in Section 6.01.
      ----------------

     "Obligations"  means  the  collective  reference  to (a) all  indebtedness,
      -----------
obligations  and  liabilities  of Pledgor under or in  connection  with the Loan
Documents,  including,  without limitation, the unpaid principal of and interest
on the Loans and the LC Exposure and all other  obligations  and  liabilities of
Pledgor (including, without limitation, interest accruing at the then applicable
rate provided in the Credit Agreement after the maturity of the Loans and the LC
Exposure  and  interest  accruing at the then  applicable  rate  provided in the
Credit  Agreement  after  the  filing  of any  petition  in  bankruptcy,  or the
commencement of any insolvency,  reorganization or like proceeding,  relating to
Pledgor,  whether or not a claim for  post-filing or  post-petition  interest is
allowed in such  proceeding)  to Secured Party or any Lender (or, in the case of
any Swap  Agreement  referred to below,  any  Affiliate of any Lender),  whether
direct  or  indirect,  absolute  or  contingent,  due or to become  due,  or now
existing or hereafter incurred,  which may arise under, out of, or in connection
with,  the Credit  Agreement,  the other Loan  Documents  or any Swap  Agreement
entered into by Pledgor with any Lender (or any Affiliate of any Lender), or any
other document made,  delivered or given in connection  therewith,  in each case
whether on account of  principal,  interest,  reimbursement  obligations,  fees,
indemnities,  costs, expenses or otherwise (including,  without limitation,  all
reasonable fees and  disbursements of counsel to Secured Party or to the Lenders
that are  required  to be paid by  Pledgor  pursuant  to the terms of any of the
foregoing agreements),  and (b) all obligations of Pledgor which may arise under
or in connection with this Agreement or any other Loan Document to which Pledgor
is a party.

     The  term  "Obligations"  shall  mean  all  indebtedness,  obligations  and
                 -----------
liabilities  described,  referred to or mentioned in the  immediately  preceding
paragraph  of this  definition,  and all  renewals,  rearrangements,  increases,
substitutions,   replacements   and   extensions  for  any  period  thereof  and
amendments, supplements or modifications thereto, in whole or in part.

                                 Exhibit D-3-4



     "Obligor" means any Person, other than Pledgor, liable (whether directly or
      -------
indirectly,  primarily or secondarily)  for the payment or performance of any of
the Obligations whether as maker, co-maker, endorser,  guarantor,  accommodation
party, general partner or otherwise.

     "Pledged  Securities"  means  all  of the  securities  and  other  property
      -------------------
(whether or not the same constitutes a "security" under the Code) referred to in
Section 1.02(a) or 1.02(b) and all additional  securities,  if any, constituting
Collateral under this Agreement.

     Section 2.03 Credit Agreement Terms.  Unless otherwise defined herein,  all
                  ----------------------
terms beginning with a capital letter which are defined in the Credit  Agreement
shall have the same meanings herein as therein.

     Section 2.04 Section References.  Unless otherwise provided for herein, all
                  ------------------
references herein to Sections are to Sections of this Agreement.

                                    ARTICLE 3

                         REPRESENTATIONS AND WARRANTIES
                         ------------------------------

     In  order to  induce  Secured  Party  to  accept  this  Agreement,  Pledgor
represents and warrants to Secured Party (which  representations  and warranties
will survive the creation and payment of the Obligations) that:

     Section 3.01 Ownership of  Collateral;  Encumbrances.   Except as otherwise
                  ---------------------------------------
permitted by the Credit Agreement, Pledgor is the record and beneficial owner of
the  Collateral  free and clear of any Lien  except  for the  security  interest
created by this  Agreement,  and Pledgor has full right,  power and authority to
pledge, assign and grant a security interest in the Collateral to Secured Party.

     Section 3.02 No Required Consent.  No authorization,  consent,  approval or
                  -------------------
other action by, and no notice to or filing with, any governmental  authority or
regulatory  body  (other  than the filing of  financing  statements  in favor of
Secured Party) is required for (i) the due execution,  delivery and  performance
by Pledgor of this Agreement, (ii) the grant by Pledgor of the security interest
granted by this Agreement or (iii) the perfection of such security interest.

     Section 3.03 Pledged  Securities.   The Pledged  Securities  have been duly
                  -------------------
authorized and validly issued, and are fully paid and non-assessable.

     Section 3.04 First  Priority  Security  Interest.  The  pledge  of Pledged
                  -----------------------------------
Securities  pursuant to this  Agreement,  the  delivery to Secured  Party of the
certificates  representing  the Pledged  Securities  accompanied by stock powers
duly executed in blank and the filing of appropriate financing statements in the
relevant locations create a valid and perfected first priority security interest
in the  Collateral,  enforceable  against  Pledgor  and all  third  parties  and
securing payment of the Obligations.

                                 Exhibit D-3-5



                                    ARTICLE 4

                            COVENANTS AND AGREEMENTS
                            ------------------------

     Pledgor  will  at all  times  comply  with  the  covenants  and  agreements
contained in this Article 4, from the date hereof and for so long as any part of
the Obligations  (other than any indemnity which is not yet due and payable) are
outstanding.

     Section 4.01 Sale,  Disposition or  Encumbrance  of  Collateral.  Except as
                  --------------------------------------------------
otherwise not prohibited by the Credit Agreement or this Agreement, Pledgor will
not in any way  encumber any of the  Collateral  (or permit or suffer any of the
Collateral to be encumbered) or sell, pledge,  assign, lend or otherwise dispose
of or transfer  any of the  Collateral  to or in favor of any Person  other than
Secured Party.

     Section 4.02 Voting Rights;  Dividends or Distributions.  Until both (i) an
                  ------------------------------------------
Event of Default shall have  occurred and be continuing  and (ii) either (a) the
Loans have become due and  payable at their  stated  maturity  and have not been
paid, (b) the Loans have been declared due and payable  pursuant to Article X of
the  Credit  Agreement,  or (c)  Secured  Party has given  notice to  Pledgor of
Secured Party's intent to exercise its rights under Section 6.02:

          (a)  Pledgor  shall  be  entitled  to  exercise  any and  all  voting,
management  and/or other consensual rights and powers inuring to an owner of the
Collateral or any part thereof for any purpose not  inconsistent  with the terms
of this Agreement and the other Loan Documents.

          (b) Pledgor shall be entitled to receive and retain (free and clear of
and no longer  subject to this  Agreement or the Lien  created  pursuant to this
Agreement) any and all dividends,  distributions and interest paid in respect of
the Collateral, provided, however, that any and all

                    (i)  dividends  and interest  paid or payable  other than in
          cash in  respect  of, and  instruments  and other  property  received,
          receivable or otherwise  distributed in respect of, or in exchange for
          (including,  without  limitation,  any certificate,  share or interest
          purchased  or exchanged  in  connection  with a tender offer or merger
          agreement),  any  Collateral,

                    (ii)  dividends and other  distributions  paid or payable in
          cash in  respect of any  Collateral  in  connection  with a partial or
          total liquidation or dissolution, or reclassification, and

                    (iii) cash paid, payable or otherwise distributed in respect
          of  principal  of,  or in  redemption  of,  or in  exchange  for,  any
          Collateral,

shall  be,  and  shall  be  promptly  delivered  to  Secured  Party  to hold as,
Collateral  and shall,  if  received  by  Pledgor,  be received in trust for the
benefit of Secured  Party,  be  segregated  from the other  property or funds of
Pledgor,  and be promptly  delivered to Secured  Party as Collateral in the same

                                 Exhibit D-3-6



form as so  received  (with any  necessary  endorsement)  ),  provided  further,
however,  in no event shall the foregoing  proviso be applicable  to, or prevent
the Pledgor from receiving and retaining any securities  that are not pledged or
intended or required to be pledged to the Secured Party pursuant to any Security
Instrument, including this Agreement.

     Section 4.03 Records and  Information.  Pledgor  shall  keep  accurate  and
                  ------------------------
complete records of the Collateral (including proceeds, payments, distributions,
income and profits).  Pledgor will promptly  provide  written  notice to Secured
Party of all  information  which in any way affects the filing of any  financing
statement or other public notices or recordings  pertaining to the perfection of
a security  interest in the Collateral,  or the delivery and possession of items
of  Collateral  for  the  purpose  of  perfecting  a  security  interest  in the
Collateral.

     Section 4.04 Certain Liabilities.  Pledgor hereby assumes all liability for
                  -------------------
the Collateral, the security interest created hereunder and any use, possession,
maintenance,  management,  enforcement  or  collection  of  any  or  all  of the
Collateral.

     Section 4.05 Further Assurances. Upon the request of Secured Party, Pledgor
                  ------------------
shall  (at  Pledgor's   expense)  execute  and  deliver  all  such  assignments,
certificates,  instruments,  securities, financing statements,  notifications to
financial intermediaries,  clearing corporations, issuers of securities or other
third parties or other  documents and give further  assurances  and do all other
acts and  things as Secured  Party may  reasonably  request  to perfect  Secured
Party's  interest in the Collateral or to protect,  enforce or otherwise  effect
Secured Party's rights and remedies hereunder.

     Section 4.06 Rights to Sell. If Secured  Party shall  determine to exercise
                  --------------
its  rights  to  sell  all  or  any of the  Collateral  pursuant  to its  rights
hereunder,  Pledgor agrees that, upon request of Secured Party, Pledgor will, at
its own expense:

          (a) execute and deliver,  and use all reasonable efforts to cause each
issuer of the Collateral  contemplated to be sold and the directors and officers
thereof to execute and deliver,  all such  instruments and documents,  and do or
cause to be done all such other acts and things,  as may be necessary or, in the
reasonable opinion of Secured Party, advisable to register such Collateral under
the  provisions of the Securities Act of 1933, as from time to time amended (the
"Securities Act"), if such registration is, in the reasonable opinion of Secured
Party, necessary or advisable to effect a public distribution of the Collateral,
and to cause the registration statement relating thereto to become effective and
to remain  effective for such period as  prospectuses  are required by law to be
furnished, and to make all amendments and supplements thereto and to the related
prospectus  which, in the reasonable  opinion of Secured Party, are necessary or
advisable, all in conformity with the requirements of the Securities Act and the
rules and  regulations  of the  Securities  and Exchange  Commission  applicable
thereto;

          (b) use all  reasonable  efforts to qualify the  Collateral  under the
state  securities  or "Blue Sky" laws and to obtain all  necessary  governmental
approvals for the sale of the Collateral, as requested by Secured Party;

                                 Exhibit D-3-7




          (c) use all  reasonable  efforts  to cause  each  such  issuer to make
available to its security holders, as soon as practicable, an earnings statement
which will satisfy the provisions of Section 11(a) of the Securities Act; and

          (d) use all  reasonable  efforts  to do or  cause  to be done all such
others acts and things as may be necessary  to make such sale of the  Collateral
or any part thereof valid and binding and in compliance with applicable law.

Pledgor further  acknowledges  the  impossibility  of ascertaining the amount of
damages  which would be  suffered  by Secured  Party by reason of the failure by
Pledgor to perform  any of the  covenants  contained  in this  Section  4.06 and
consequently agrees that if Pledgor shall fail to perform any of such covenants,
it shall pay (to the extent permitted by law), as liquidated damages, and not as
penalty,  an  amount  (in no event to exceed  the  amount  of  Obligations  then
outstanding) equal to the value of the Collateral  affected by Pledgor's failure
to perform any of the  covenants  contained in this Section 4.06 on the date the
Secured Party shall demand compliance with this Section 4.06.

                                    ARTICLE 5

                   RIGHTS, DUTIES AND POWERS OF SECURED PARTY
                   ------------------------------------------

     The following  rights,  duties and powers of Secured  Party are  applicable
irrespective of whether an Event of Default occurs and is continuing:

     Section 5.01 Discharge  Encumbrances.  Secured  Party  may, at its  option,
                  -----------------------
three (3) Business Days after  receipt by Pledgor of prior  written  notice from
Secured Party of its intent to do so,  discharge any Liens at any time levied or
placed on the Collateral  that are  prohibited by the Credit  Agreement and that
are not being contested in good faith by appropriate proceedings. Pledgor agrees
to reimburse  Secured Party within five (5) days after demand for any payment so
made, plus interest  thereon from the date of Secured Party's demand at the rate
per  annum  equal to 2% plus the rate  applicable  to ABR Loans as  provided  in
Section 3.02(a) of the Credit Agreement.

     Section 5.02 Transfer of  Collateral.  Subject  to  the terms of the Credit
                  -----------------------
Agreement,  Secured Party may transfer any or all of the  Obligations,  and upon
any such  transfer  Secured Party may transfer its interest in any or all of the
Collateral and shall be fully discharged thereafter from all liability therefor.
Any transferee of the Collateral shall be vested with all rights, powers, duties
and remedies of Secured Party hereunder.

     Section 5.03 Cumulative and Other Rights.  The rights,  powers and remedies
                  ---------------------------
of Secured Party  hereunder  are in addition to all rights,  powers and remedies
given by law or in equity.  The exercise by Secured  Party of any one or more of
the rights, powers and remedies herein shall not be construed as a waiver of any
other rights,  powers and remedies,  including,  without  limitation,  any other
rights of set-off.

     Section 5.04 Disclaimer  of Certain  Duties.  The powers  conferred  upon
                  ------------------------------
Secured Party by this  Agreement  are to protect its interest in the  Collateral
and shall not impose any duty upon  Secured  Party to exercise  any such powers.
Pledgor  hereby agrees that Secured Party shall not be liable for, nor shall the

                                 Exhibit D-3-8



indebtedness  evidenced by the  Obligations be diminished  by,  Secured  Party's
delay or  failure  to collect  upon,  foreclose,  sell,  take  possession  of or
otherwise obtain value for the Collateral.

     Section 5.05 Custody and  Preservation  of the  Collateral.  Secured  Party
                  ---------------------------------------------
shall  be  deemed  to  have  exercised   reasonable  care  in  the  custody  and
preservation  of the  Collateral in its possession if the Collateral is accorded
treatment  substantially  equal to that which comparable  secured parties accord
comparable  collateral,  it being understood and agreed,  however,  that Secured
Party shall not have  responsibility  for (i) ascertaining or taking action with
respect to calls, conversions,  exchanges,  maturities, tenders or other matters
relative to any  Collateral,  whether or not  Secured  Party has or is deemed to
have knowledge of such matters,  or (ii) taking any necessary  steps to preserve
rights against Persons or entities with respect to any Collateral.

                                    ARTICLE 6

                                EVENTS OF DEFAULT
                                -----------------

     Section 6.01 Events.  An  "Event  of  Default"  (as  defined  in the Credit
                  ------
Agreement)  which has occurred and is  continuing  shall  constitute an Event of
Default under this Agreement.

     Section 6.02 Remedies.  Upon the  occurrence and during the  continuance of
                  --------
any Event of Default, Secured Party may take any or all of the following actions
without notice or demand to Pledgor (except that Secured Party will not take any
action in the case of paragraphs  (b) and (f) below until five (5) Business Days
after  receipt by Pledgor of written  notice from Secured Party of its intent to
do so):

          (a)  Subject  to  applicable   provisions   contained  in  the  Credit
Agreement,  declare all or part of the indebtedness  pursuant to the Obligations
immediately  due and payable  and enforce  payment of the same by Pledgor or any
Obligor.

          (b)  Sell,  in one or  more  sales  and in  one or  more  parcels,  or
otherwise dispose of any or all of the Collateral in any commercially reasonable
manner as Secured Party may elect,  in a public or private  transaction,  at any
location as deemed  reasonable by Secured Party either for cash or credit or for
future  delivery at such price as Secured Party may  reasonably  deem fair,  and
(unless  prohibited by the Uniform Commercial Code, as adopted in any applicable
jurisdiction)  Secured  Party may be the  purchaser of any or all  Collateral so
sold and may apply upon the  purchase  price  therefor any  Obligations  secured
hereby.  Any such sale or transfer by Secured  Party  either to itself or to any
other  Person  shall be  absolutely  free  from any  claim of right by  Pledgor,
including any equity or right of redemption, stay or appraisal which Pledgor has
or may have  under  any rule of law,  regulation  or  statute  now  existing  or
hereafter adopted. Upon any such sale or transfer,  Secured Party shall have the
right to deliver, assign and transfer to the purchaser or transferee thereof the
Collateral  so sold  or  transferred.  If  Secured  Party  reasonably  deems  it
advisable to do so, it may restrict the bidders or  purchasers  of any such sale
or transfer to Persons or entities  who will  represent  and agree that they are
purchasing  the  Collateral  for their own  account and not with the view to the
distribution  or resale of any of the  Collateral.  Secured  Party  may,  at its
discretion, provide for a public sale, and any such public sale shall be held at
such time or times within ordinary business hours and at such place or places as

                                 Exhibit D-3-9



Secured  Party may fix in the notice of such sale.  Secured  Party  shall not be
obligated  to make any sale  pursuant  to any such  notice.  Secured  Party may,
without  notice  or   publication,   adjourn  any  public  or  private  sale  by
announcement  at any time and place  fixed for such  sale,  and such sale may be
made at any time or place to which  the same may be so  adjourned.  In the event
any sale or transfer  hereunder is not  completed or is defective in the opinion
of Secured Party,  such sale or transfer shall not exhaust the rights of Secured
Party  hereunder,  and  Secured  Party shall have the right to cause one or more
subsequent  sales  or  transfers  to be  made  hereunder.  If  only  part of the
Collateral is sold or transferred such that the Obligations  remain  outstanding
(in whole or in part),  Secured Party's rights and remedies  hereunder shall not
be exhausted, waived or modified, and Secured Party is specifically empowered to
make one or more successive sales or transfers until all the Collateral shall be
sold or transferred  and all the Obligations are paid. In the event that Secured
Party elects not to sell the  Collateral,  Secured  Party  retains its rights to
dispose of or utilize the  Collateral or any part or parts thereof in any manner
authorized  or permitted  by law or in equity,  and to apply the proceeds of the
same towards payment of the Obligations.

          (c)  Apply  proceeds  of  the  disposition  of the  Collateral  to the
Obligations  in any manner elected by Secured Party and permitted by the Code or
otherwise permitted by law or in equity.  Such application may include,  without
limitation,  the  reasonable  attorneys'  fees and legal  expenses  incurred  by
Secured Party.

          (d) Appoint  any Person as agent to perform any act or acts  necessary
or incident to any sale or transfer by Secured Party of the Collateral.

          (e) Receive, change the address for delivery, open and dispose of mail
addressed to Pledgor,  and to execute,  assign and endorse  negotiable and other
instruments  for the payment of money,  documents of title or other evidences of
payment,  shipment or storage for any form of Collateral on behalf of and in the
name of Pledgor.

          (f)  Exercise  all other  rights and  remedies  permitted by law or in
equity.

     Section 6.03 Attorney-in-Fact.  Pledgor hereby irrevocably appoints Secured
                  ----------------
Party as Pledgor's attorney-in-fact,  with full authority in the place and stead
of Pledgor and in the name of Pledgor or otherwise, from time to time in Secured
Party's discretion upon the occurrence and during the continuance of an Event of
Default,  but at  Pledgor's  cost and  expense,  three (3)  Business  Days after
receipt by Pledgor of written  notice from Secured Party of its intent to do so,
to take  any  action  and to  execute  any  assignment,  certificate,  financing
statement, stock power, notification, document or instrument which Secured Party
may deem  necessary or advisable to accomplish  the purposes of this  Agreement,
including,  without limitation,  to receive, endorse and collect all instruments
made payable to Pledgor  representing  any dividend,  interest  payment or other
distribution  in respect of the  Collateral or any part thereof and to give full
discharge for the same.

     Section 6.04 Liability for Deficiency.  If any sale or other disposition of
                  ------------------------
Collateral by Secured Party in compliance with the Loan Documents and applicable
law or any other action of Secured Party  hereunder in compliance  with the Loan
Documents  and  applicable  law results in  reduction of the  Obligations,  such
action will not release  Pledgor  from its  liability  to Secured  Party for any

                                 Exhibit D-3-10



unpaid  Obligations,  including (to the extent permitted by law) costs,  charges
and expenses  incurred in the liquidation of Collateral,  together with interest
thereon until paid at the rate per annum equal to 2% plus the rate applicable to
ABR Loans as provided in Section 3.02(a) of the Credit  Agreement,  and the same
shall be immediately due and payable to Secured Party at Secured Party's address
set forth in the opening paragraph hereof.

     Section 6.05 Reasonable  Notice.  If  any  applicable  provision of any law
                  ------------------
requires  Secured Party to give reasonable  notice of any sale or disposition or
other action,  Pledgor  hereby agrees that ten days' prior written  notice shall
constitute  reasonable notice thereof.  Such notice, in the case of public sale,
shall  state the time and place  fixed for such sale and, in the case of private
sale, the time after which such sale is to be made.

     Section 6.06 Pledged  Securities.  Upon both (i) the  occurrence and during
                  -------------------
the  continuance  of an Event of Default and (ii) either (a) the Loans  becoming
due and  payable at their  stated  maturity  and not paid,  (b) the Loans  being
declared due and payable pursuant to Article X of the Credit  Agreement,  or (c)
Secured Party giving prior written  notice to Pledgor of Secured  Party's intent
to exercise its rights under Section 6.02:

          (a) All  rights of  Pledgor  to receive  the  dividends  and  interest
payments which it would  otherwise be authorized to receive and retain  pursuant
to Section 4.02 shall cease,  and all such rights shall thereupon  become vested
in Secured Party who shall  thereupon have the sole right to receive and hold as
Collateral such dividends and interest payments, but Secured Party shall have no
duty to receive and hold such  dividends and interest  payments and shall not be
responsible for any failure to do so or delay in so doing.

          (b) All dividends and interest  payments which are received by Pledgor
contrary to the  provisions  of this Section 6.06 shall be received in trust for
the benefit of Secured  Party,  shall be segregated  from other funds of Pledgor
and shall be promptly  paid over to Secured Party as Collateral in the same form
as so received (with any necessary endorsement).

          (c)  Secured  Party may  exercise  any and all  rights of  conversion,
exchange,  subscription or any other rights, privileges or options pertaining to
any  of the  Pledged  Securities  as if it  were  the  absolute  owner  thereof,
including without limitation,  the right to exchange at its discretion,  any and
all of the Pledged  Securities upon the merger,  consolidation,  reorganization,
recapitalization  or other readjustment of any issuer of such Pledged Securities
or upon the exercise by any such issuer or Secured Party of any right, privilege
or  option  pertaining  to any  of  the  Pledged  Securities  and in  connection
therewith, to deposit and deliver any and all of the Pledged Securities with any
committee, depository, transfer agent, registrar or other designated agency upon
such terms and conditions as it may determine,  all without  liability except to
account for property  actually  received by it, but Secured  Party shall have no
duty to exercise any of the  aforesaid  rights,  privileges or options and shall
not be responsible for any failure to do so or delay in so doing.

     Section 6.07 Non-judicial  Enforcement.  To the  extent  permitted  by law,
                  -------------------------
Secured Party may enforce its rights hereunder without prior judicial process or
judicial  hearing,  and to the extent permitted by law Pledgor  expressly waives
any and all legal rights which might otherwise  require Secured Party to enforce
its rights by judicial process.

                                 Exhibit D-3-11



                                    ARTICLE 7

                            MISCELLANEOUS PROVISIONS
                            ------------------------

     Section 7.01 Notices. Any notice required or permitted to be given under or
                  -------
in  connection  with this  Agreement  shall be in writing and shall be mailed by
first  class or  express  mail,  postage  prepaid,  or sent by telex,  telegram,
telecopy or other  similar  form of rapid  written  transmission  or  personally
delivered to the receiving party. All such communications  shall be mailed, sent
or delivered  at the address  respectively  indicated  in the opening  paragraph
hereof or at such other  address as either  party may have  furnished  the other
party in writing.  Any  communication so addressed and mailed shall be deemed to
be given upon receipt, any notice so sent by rapid written transmission shall be
deemed to be given when  receipt of such  transmission  is  acknowledged  by the
receiving  operator or equipment,  and any  communication so delivered in person
shall be deemed to be given when  receipted for or actually  received by Pledgor
or Secured Party, as the case may be.

     Section 7.02 Amendments and Waivers.  Secured Party's acceptance of partial
                  ----------------------
or delinquent payments or any forbearance,  failure or delay by Secured Party in
exercising any right,  power or remedy hereunder shall not be deemed a waiver of
any  obligation of Pledgor or any Obligor,  or of any right,  power or remedy of
Secured  Party;  and no partial  exercise  of any right,  power or remedy  shall
preclude any other or further  exercise  thereof.  Secured  Party may remedy any
Event of Default hereunder or in connection with the Obligations without waiving
the Event of Default so remedied.  Pledgor  hereby  agrees that if Secured Party
agrees to a waiver of any provision  hereunder,  or an exchange of or release of
the Collateral,  or the addition or release of any Obligor or other Person,  any
such action shall not constitute a waiver of any of Secured Party's other rights
or of Pledgor's obligations hereunder.  This Agreement may be amended only by an
instrument in writing  executed  jointly by Pledgor and Secured Party and may be
supplemented  only by documents  delivered or to be delivered in accordance with
the express terms hereof.

     Section 7.03 Copy as Financing Statement. A photocopy or other reproduction
                  ---------------------------
of this  Agreement may be delivered by Pledgor or Secured Party to any financial
intermediary  or other third party for the purpose of transferring or perfecting
any or all of the  Pledged  Securities  to  Secured  Party  or its  designee  or
assignee.

     Section 7.04 Possession  of  Collateral.  Secured  Party shall be deemed to
                  --------------------------
have  possession of any  Collateral in transit to it or set apart for it (or, in
either case, any of its agents, affiliates or correspondents).

     Section 7.05 Redelivery  of  Collateral.   If  any   sale  or  transfer  of
                  --------------------------
Collateral by Secured Party results in full satisfaction of the Obligations, and
after such sale or transfer and  discharge  there remains a surplus of proceeds,
Secured  Party will  deliver to Pledgor such excess  proceeds in a  commercially
reasonable  time;  provided,  however,  that  Secured  Party  shall not have any
liability  for any  interest,  cost or expense in  connection  with any delay in
delivering such proceeds to Pledgor.

Exhibit D-3-12



     Section 7.06 Governing Law;  Jurisdiction.  This Agreement and the security
                  ----------------------------
interest  granted  hereby shall be construed in accordance  with and governed by
the laws of the State of Texas  (except to the extent that the laws of any other
jurisdiction  govern the  perfection  and  priority  of the  security  interests
granted hereby).

     Section 7.07 Continuing Security Agreement.
                  -----------------------------

          (a) Except as otherwise provided by applicable law (including, without
limitation,  Section  9.620 of the Code),  no action taken or omission to act by
Secured Party hereunder,  including,  without limitation, any exercise of voting
or  consensual  rights  pursuant to Section  6.06 or any other  action  taken or
inaction  pursuant to Section 6.02, shall be deemed to constitute a retention of
the  Collateral in  satisfaction  of the  Obligations or otherwise to be in full
satisfaction of the Obligations,  and the Obligations shall remain in full force
and effect, until Secured Party shall have applied payments (including,  without
limitation,  collections  from  Collateral)  towards the Obligations in the full
amount then outstanding or until such subsequent time as is hereinafter provided
in subsection (b) below.

          (b) To the extent that any payments on the  Obligations or proceeds of
the  Collateral  are  subsequently  invalidated,  declared to be  fraudulent  or
preferential,  set  aside or  required  to be  repaid  to a  trustee,  debtor in
possession,  receiver or other Person under any  bankruptcy  law,  common law or
equitable  cause,  then to such extent the  Obligations  so  satisfied  shall be
revived and  continue as if such  payment or proceeds  had not been  received by
Secured  Party,  and Secured  Party's  security  interests,  rights,  powers and
remedies  hereunder shall continue in full force and effect. In such event, this
Agreement shall be  automatically  reinstated if it shall  theretofore have been
terminated pursuant to Section 7.08.

     Section 7.08 Termination.  The grant of a security  interest  hereunder and
                  -----------
all of Secured Party's rights, powers and remedies in connection therewith shall
remain in full force and effect until  Secured Party has (i)  retransferred  and
delivered  all  Collateral  in its  possession  to Pledgor,  and (ii) executed a
written  release or  termination  statement and  reassigned  to Pledgor  without
recourse or warranty any remaining  Collateral and all rights  conveyed  hereby.
Upon (i) the complete payment of the Obligations (other than any indemnity which
is not yet due and payable),  (ii) the expiration of all outstanding  Letters of
Credit,  and (iii) the  termination of the  Commitments,  Secured Party,  at the
written request and expense of Pledgor, will release,  reassign and transfer the
Collateral  to Pledgor and declare this  Agreement to be of no further  force or
effect.  Notwithstanding  the  foregoing,  Section  4.04 and the  provisions  of
subsection 7.07(b) shall survive the termination of this Agreement.

     Section 7.09 Counterparts; Effectiveness. This Agreement may be executed in
                  ---------------------------
two or more counterparts.  Each counterpart is deemed an original,  but all such
counterparts  taken  together  constitute  one and  the  same  instrument.  This
Agreement becomes effective upon the execution hereof by Pledgor and delivery of
the same to Secured Party,  and it is not necessary for Secured Party to execute
any acceptance hereof or otherwise signify or express its acceptance hereof.

     Section 7.10 Limitation by Law. All rights, remedies and powers provided in
                  -----------------
this  Agreement  may be exercised  only to the extent that the exercise  thereof

                                 Exhibit D-3-13



does not violate any applicable provision of law, and all the provisions of this
Agreement are intended to be subject to all applicable  mandatory  provisions of
law which may be controlling  and to be limited to the extent  necessary so that
they shall not render  this  Agreement  invalid,  unenforceable,  in whole or in
part, or not entitled to be recorded,  registered or filed under the  provisions
of any applicable law.

     Section 7.11 Interest. It is the intention of the parties hereto to conform
                  --------
strictly to usury laws  applicable to Secured Party or any Lender.  Accordingly,
if the transactions contemplated hereby would be usurious under applicable state
or federal law, then, notwithstanding anything to the contrary in this Agreement
or in any other Loan Document, it is agreed as follows: (i) the aggregate of all
consideration  which constitutes  interest under law applicable to Secured Party
or any Lender that is contracted for, taken, reserved, charged or received under
the Obligations, this Agreement or under any other Loan Document or otherwise in
connection with the Obligations shall under no circumstances  exceed the maximum
amount  allowed by such  applicable  law, (ii) in the event that the maturity of
the Obligations is accelerated  for any reason,  or in the event of any required
or permitted prepayment, then such consideration that constitutes interest under
law  applicable  to Secured Party or any Lender may never include more than such
maximum  amount,  and  (iii)  excess  interest,  if  any,  provided  for in this
Agreement, any other Loan Document or otherwise shall be cancelled automatically
and, if  theretofore  paid,  shall be credited by Secured Party on the principal
amount of the  Obligations  (or, to the extent that the principal  amount of the
Obligations  shall  have  been or would  thereby  be paid in full,  refunded  by
Secured  Party  to  Pledgor).  The  right  to  accelerate  the  maturity  of the
Obligations  does not include the right to accelerate any interest which has not
otherwise  accrued on the date of such  acceleration,  and neither Secured Party
nor any  Lender  intend  to  collect  any  unearned  interest  in the  event  of
acceleration.  All sums paid or agreed to be paid to Secured Party or any Lender
for  the  use,  forbearance  or  detention  of  sums  included  in  the  initial
Obligations  shall,  to the extent  permitted by  applicable  law, be amortized,
prorated, allocated and spread throughout the full term of the Obligations until
payment in full so that the rate or amount of interest on account of the initial
Obligations does not exceed the applicable usury ceiling, if any.

                         [Signatures begin on next page]

                                 Exhibit D-3-14





PLEDGOR:                ST. MARY LAND & EXPLORATION COMPANY
- -------


                        By:   _______________________________________

                              David W. Honeyfield
                              Vice President - Finance, Secretary and Treasurer



SECURED PARTY:          WACHOVIA BANK, NATIONAL ASSOCIATION, as
- -------------           Administrative Agent



                        By:   _______________________________________
                        Name: Philip J. Trinder
                              Title: Vice President

                                 Exhibit D-3-15



                                    EXHIBIT A

                               PLEDGED SECURITIES
                               ------------------



1.   St. Mary Energy Company, a Delaware  corporation  ("SMEC") -- 100 shares of
     the common  stock of SMEC,  registered  in the name of St.  Mary Land &
     Exploration  Company  ("Pledgor")  on the books of SMEC, as  represented by
     Certificate No. 001.

2.   Nance Petroleum Corporation, a Montana corporation ("Nance") -

     a.   20,000 shares of the common stock of Nance,  registered in the name of
          Pledgor on the books of Nance, as represented by Certificate No. 034.

     b.   5,000 shares of the common stock of Nance,  registered  in the name of
          Pledgor on the books of Nance, as represented by Certificate No. 015.

                                 Exhibit D-3-16



                                   EXHIBIT D-4










- --------------------------------------------------------------------------------

                                     FORM OF

               AMENDED AND RESTATED PLEDGE AND SECURITY AGREEMENT

                                     Between

                          NANCE PETROLEUM CORPORATION,

                                   as Pledgor

                                       and

          WACHOVIA BANK, NATIONAL ASSOCIATION, as Administrative Agent,

                                as Secured Party

                          Effective as of April 7, 2005

- --------------------------------------------------------------------------------



                                 Exhibit D-4-1



               AMENDED AND RESTATED PLEDGE AND SECURITY AGREEMENT
               --------------------------------------------------


     THIS AMENDED AND RESTATED  PLEDGE AND SECURITY  AGREEMENT is made effective
as of April 7, 2005, by NANCE PETROLEUM CORPORATION,  a Montana corporation with
principal offices at 550 N. 31st Street, Suite 500, Billings, Montana 59103-7168
("Pledgor"), in favor of WACHOVIA BANK, NATIONAL ASSOCIATION, a national banking
  -------
association with offices at 301 South College Street, Charlotte,  North Carolina
28288, as Administrative  Agent (in such capacity,  the "Secured Party") for the
                                                         -------------
benefit of the  several  lenders  now or  hereafter  parties to the  hereinafter
defined  Credit  Agreement  (individually,  a  "Lender"  and  collectively,  the
                                                ------
"Lenders").
 -------

                                    RECITALS

     A. Pursuant to that certain Credit  Agreement dated as of January 27, 2003,
among St.  Mary Land &  Exploration  Company,  a Delaware  corporation  (the
"Borrower"),  Secured  Party  and  the  lenders  party  thereto  (the  "Existing
 --------                                                               --------
Lenders") (such Credit  Agreement,  as amended and  supplemented,  the "Existing
- -------                                                                 --------
Credit  Agreement"),  Pledgor  received  certain loans and  extensions of credit
- -----------------
under a revolving  credit  facility made available to Pledgor under the Existing
Credit Agreement, up to the aggregate principal amount of $300,000,000.

     B. The Existing Lenders  conditioned  their  obligations under the Existing
Credit  Agreement  upon the  execution  and  delivery by Pledgor of that certain
Pledge and Security Agreement dated as of January 27, 2003 (the "Existing Pledge
                                                                 ---------------
and Security Agreement").
- ----------------------

     C. The  Borrower,  Secured  Party and the Lenders have amended and restated
the Existing Credit Agreement by entering into that certain Amended and Restated
Credit  Agreement  dated of even date  herewith  (as  amended,  supplemented  or
otherwise  modified  from time to time,  the "Credit  Agreement")  "),  whereby,
                                              -----------------
pursuant to which,  the Lenders have agreed to make certain  loans to and extend
certain credit for the account of the Borrower  subject to the  limitations  set
forth in the Credit Agreement. The initial loans under the Credit Agreement have
been used by the  Borrower  to renew,  rearrange,  modify and extend all amounts
outstanding under the Existing Credit Agreement.

     D. Pursuant to that certain Amended and Restated  Guaranty  Agreement dated
of even date  herewith,  from  Pledgor  in favor of Secured  Party (as  amended,
supplemented  or other  modified from time to time,  the "Guaranty  Agreement"),
                                                          -------------------
Pledgor has unconditionally guaranteed the prompt payment and performance of all
indebtedness,  obligations  and  liabilities  of the Borrower to the Lenders and
secured Party under or in connection with the Credit Agreement.

     E. The Secured  Party and the Lenders have  conditioned  their  obligations
under the Credit  Agreement  upon the  execution and delivery by Pledgor of this
Amended and Restated  Pledge and Security  Agreement,  and Pledgor has agreed to
execute and deliver this Amended and Restated Pledge and Security Agreement.

     NOW, THEREFORE, (i) in order to comply with the terms and conditions of the
Credit Agreement,  (ii) to induce the Lenders, at any time or from time to time,
to loan  monies  and extend  credit,  with or  without  security,  to or for the
account of Borrower in accordance with the terms of the Credit Agreement,  (iii)

                                 Exhibit D-4-2



at the special  insistence  and request of the Lenders,  and (iv) for other good
and  valuable  consideration,  the  receipt and  sufficiency  of which is hereby
acknowledged,  Pledgor and Secured  Party hereby agree that the Existing  Pledge
and Security Agreement is hereby amended and restated in its entirety to read as
follows:

                                    ARTICLE 1

                                SECURITY INTEREST
                                -----------------

     Section 1.01 Pledge. Pledgor hereby pledges,  assigns and grants to Secured
                  ------
Party a security interest in and right of set-off against the assets referred to
in Section 1.02 (the  "Collateral") to secure the prompt payment and performance
                       ----------
of the "Obligations" (as defined in Section 2.02) and the performance by Pledgor
        -----------
of this Amended and Restated Pledge and Security Agreement.

     Section 1.02 Collateral.  The Collateral consists of the following types or
                  ----------
items of property which are owned by Pledgor:

          (a) The  securities  described  or  referred  to in Exhibit A attached
hereto and made a part hereof.

          (b) (i) The  certificates or instruments,  if any,  representing  such
membership  interests  and  such  units,  (ii)  all  dividends  (cash,  stock or
otherwise),  cash,  instruments,  rights to subscribe,  purchase or sell and all
other rights and property  from time to time  received,  receivable or otherwise
distributed  in  respect  of or in  exchange  for any or all of such  membership
interests or such units, (iii) all replacements and substitutions for any of the
property referred to in this Section 1.02, including, without limitation, claims
against third parties, and (iv) the proceeds, interest, profits and other income
of or on any of the property referred to in this Section 1.02.

It is expressly  contemplated  that additional  securities or other property may
from time to time be pledged, assigned or granted to Secured Party as additional
security for the Obligations,  and the term "Collateral" as used herein shall be
deemed  for all  purposes  hereof  to  include  all such  additional  membership
interests,  units and property,  together  with all other  property of the types
described above related thereto.

     Section 1.03 Transfer of  Collateral.   All  certificates   or  instruments
                  -----------------------
representing or evidencing the Pledged Securities shall be delivered to and held
pursuant  hereto by Secured  Party or a Person  designated  by Secured Party and
shall be in suitable form for transfer by delivery,  or shall be  accompanied by
duly executed instruments of transfer or assignment in blank, or (in the case of
either certificated or uncertificated  securities) Secured Party shall have been
provided with evidence that the Pledged Securities have been otherwise delivered
to Secured Party in accordance  with Section 8.301 of the Code,  all in form and
substance satisfactory to Secured Party. Notwithstanding the preceding sentence,
at Secured  Party's  discretion,  all Pledged  Securities  must be  delivered or
transferred in such manner as to permit  Secured Party to meet the  requirements
of  Section  8.303(a)(3)  of the Code to the  extent of its  security  interest.
Secured Party shall have the right,  at any time in its  discretion  and without
notice to Pledgor, to transfer to or to register in the name of Secured Party or
any of its  nominees any or all of the Pledged  Securities,  subject only to the

                                 Exhibit D-4-3



revocable  rights  specified in Section 4.02.  In addition,  Secured Party shall
have the right at any time to exchange certificates or instruments  representing
or evidencing  Pledged  Securities for certificates or instruments of smaller or
larger denominations.

                                    ARTICLE 2

                                   DEFINITIONS
                                   -----------

     Section 2.01 Terms  Defined  Above.  As  used in this  Amended and Restated
                  ---------------------
Pledge and Security  Agreement,  the terms defined above shall have the meanings
respectively assigned to them.

     Section 2.02 Certain  Definitions.  As  used in this  Amended  and Restated
                  --------------------
Pledge and Security  Agreement,  the  following  terms shall have the  following
meanings, unless the context otherwise requires:

     "Agreement" means this Amended and Restated Pledge and Security  Agreement,
      ---------
as the  same  may  from  time to  time be  amended,  supplemented  or  otherwise
modified.

     "Code"  means the Uniform  Commercial  Code as  presently  in effect in the
      ----
State of Texas,  Articles 1 through 9. Unless otherwise indicated by the context
herein,  all uncapitalized  terms which are defined in the Code shall have their
respective meanings as used in Articles 8 and 9 of the Code.

     "Event of Default" means any event specified in Section 6.01.
      ----------------

     "Obligations"  means  the  collective  reference  to (a) all  indebtedness,
      -----------
obligations and liabilities of the Borrower under or in connection with the Loan
Documents,  including,  without limitation, the unpaid principal of and interest
on the Loans and the LC Exposure and all other  obligations  and  liabilities of
the  Borrower  (including,  without  limitation,  interest  accruing at the then
applicable rate provided in the Credit Agreement after the maturity of the Loans
and the LC Exposure and interest  accruing at the then  applicable rate provided
in the Credit  Agreement after the filing of any petition in bankruptcy,  or the
commencement of any insolvency,  reorganization or like proceeding,  relating to
the Borrower,  whether or not a claim for post-filing or post-petition  interest
is allowed in such  proceeding)  to Secured Party or any Lender (or, in the case
of any Swap Agreement  referred to below, any Affiliate of any Lender),  whether
direct  or  indirect,  absolute  or  contingent,  due or to become  due,  or now
existing or hereafter incurred,  which may arise under, out of, or in connection
with,  the Credit  Agreement,  the other Loan  Documents  or any Swap  Agreement
entered into by the Borrower  with any Lender (or any  Affiliate of any Lender),
or any other document made, delivered or given in connection therewith,  in each
case whether on account of principal, interest, reimbursement obligations, fees,
indemnities,  costs, expenses or otherwise (including,  without limitation,  all
reasonable fees and  disbursements of counsel to Secured Party or to the Lenders
that are required to be paid by the Borrower pursuant to the terms of any of the
foregoing  agreements),  (b) all  indebtedness,  obligations  and liabilities of
Pledgor  under  or in  connection  with  the  Guaranty  Agreement  and  (c)  all
obligations  of  Pledgor  which  may  arise  under or in  connection  with  this
Agreement or any other Loan Document to which Pledgor is a party.

                                 Exhibit D-4-4



     The  term  "Obligations"  shall  mean  all  indebtedness,  obligations  and
                 -----------
liabilities  described,  referred to or mentioned in the  immediately  preceding
paragraph  of this  definition,  and all  renewals,  rearrangements,  increases,
substitutions,   replacements   and   extensions  for  any  period  thereof  and
amendments, supplements or modifications thereto, in whole or in part.

     "Obligor" means any Person, other than Pledgor, liable (whether directly or
      -------
indirectly,  primarily or secondarily)  for the payment or performance of any of
the Obligations whether as maker, co-maker, endorser,  guarantor,  accommodation
party, general partner or otherwise.

     "Pledged  Securities"  means  all  of the  securities  and  other  property
      -------------------
(whether or not the same constitutes a "security" under the Code) referred to in
Section 1.02(a) or 1.02(b) and all additional  securities,  if any, constituting
Collateral under this Agreement.

     Section 2.03 Credit Agreement Terms. Unless otherwise defined herein, terms
                  ----------------------
beginning with a capital letter which are defined in the Credit  Agreement shall
have the same meanings herein as therein.

     Section 2.04 Section References.  Unless otherwise provided for herein, all
                  ------------------
references herein to Sections are to Sections of this Agreement.

                                    ARTICLE 3

                         REPRESENTATIONS AND WARRANTIES
                         ------------------------------

     In  order to  induce  Secured  Party  to  accept  this  Agreement,  Pledgor
represents and warrants to Secured Party (which  representations  and warranties
will survive the creation and payment of the Obligations) that:

     Section 3.01 Ownership of  Collateral;  Encumbrances.   Except as otherwise
                  ---------------------------------------
permitted by the Credit Agreement, Pledgor is the record and beneficial owner of
the  Collateral  free and clear of any Lien  except  for the  security  interest
created by this  Agreement,  and Pledgor has full right,  power and authority to
pledge, assign and grant a security interest in the Collateral to Secured Party.

     Section 3.02 No Required Consent.  No authorization,  consent,  approval or
                  -------------------
other action by, and no notice to or filing with, any governmental  authority or
regulatory  body  (other  than the filing of  financing  statements  in favor of
Secured Party) is required for (i) the due execution,  delivery and  performance
by Pledgor of this Agreement, (ii) the grant by Pledgor of the security interest
granted by this Agreement or (iii) the perfection of such security interest.

     Section 3.03 Pledged  Securities.   The Pledged  Securities  have been duly
                  -------------------
authorized and validly issued, and are fully paid and non-assessable.

     Section 3.04 First  Priority  Security  Interest.  The  pledge  of  Pledged
                  -----------------------------------
Securities  pursuant to this  Agreement,  the  delivery to Secured  Party of the
certificates  representing  the Pledged  Securities  accompanied by stock powers
duly executed in blank and the filing of appropriate financing statements in the
relevant locations create a valid and perfected first priority security interest

                                 Exhibit D-4-5



in the  Collateral,  enforceable  against  Pledgor  and all  third  parties  and
securing payment of the Obligations.

                                    ARTICLE 4

                            COVENANTS AND AGREEMENTS
                            ------------------------

     Pledgor  will  at all  times  comply  with  the  covenants  and  agreements
contained in this Article 4, from the date hereof and for so long as any part of
the Obligations  (other than any indemnity which is not yet due and payable) are
outstanding.

     Section 4.01 Sale,  Disposition or  Encumbrance  of  Collateral.  Except as
                  --------------------------------------------------
otherwise not prohibited by the Credit Agreement or this Agreement, Pledgor will
not in any way  encumber any of the  Collateral  (or permit or suffer any of the
Collateral to be encumbered) or sell, pledge,  assign, lend or otherwise dispose
of or transfer  any of the  Collateral  to or in favor of any Person  other than
Secured Party.

     Section 4.02 Voting Rights;  Dividends or Distributions.  Until both (i) an
                  ------------------------------------------
Event of Default shall have  occurred and be continuing  and (ii) either (a) the
Loans have become due and  payable at their  stated  maturity  and have not been
paid, (b) the Loans have been declared due and payable  pursuant to Article X of
the  Credit  Agreement,  or (c)  Secured  Party has given  notice to  Pledgor of
Secured Party's intent to exercise its rights under Section 6.02:

          (a)  Pledgor  shall  be  entitled  to  exercise  any and  all  voting,
management  and/or other consensual rights and powers inuring to an owner of the
Collateral or any part thereof for any purpose not  inconsistent  with the terms
of this Agreement and the other Loan Documents.

          (b) Pledgor shall be entitled to receive and retain (free and clear of
and no longer  subject to this  Agreement or the Lien  created  pursuant to this
Agreement) any and all dividends,  distributions and interest paid in respect of
the Collateral,  provided,  however, that any and all

                    (i)  dividends  and interest  paid or payable  other than in
          cash in  respect  of, and  instruments  and other  property  received,
          receivable or otherwise  distributed in respect of, or in exchange for
          (including,  without  limitation,  any certificate,  share or interest
          purchased  or exchanged  in  connection  with a tender offer or merger
          agreement), any Collateral,

                    (ii)  dividends and other  distributions  paid or payable in
          cash in  respect of any  Collateral  in  connection  with a partial or
          total liquidation or dissolution, or reclassification, and

                    (iii) cash paid, payable or otherwise distributed in respect
          of  principal  of,  or in  redemption  of,  or in  exchange  for,  any
          Collateral,

shall  be,  and  shall  be  promptly  delivered  to  Secured  Party  to hold as,
Collateral  and shall,  if  received  by  Pledgor,  be received in trust for the
benefit of Secured  Party,  be  segregated  from the other  property or funds of

                                 Exhibit D-4-6



Pledgor,  and be promptly  delivered to Secured  Party as Collateral in the same
form as so  received  (with any  necessary  endorsement)  ),  provided  further,
however,  in no event shall the foregoing  proviso be applicable  to, or prevent
the Pledgor from receiving and retaining any securities  that are not pledged or
intended or required to be pledged to the Secured Party pursuant to any Security
Instrument, including this Agreement.

     Section 4.03 Records and  Information.  Pledgor  shall  keep  accurate  and
                  ------------------------
complete records of the Collateral (including proceeds, payments, distributions,
income and profits).  Pledgor will promptly  provide  written  notice to Secured
Party of all  information  which in any way affects the filing of any  financing
statement or other public notices or recordings  pertaining to the perfection of
a security  interest in the Collateral,  or the delivery and possession of items
of  Collateral  for  the  purpose  of  perfecting  a  security  interest  in the
Collateral.

     Section 4.04 Certain Liabilities.  Pledgor hereby assumes all liability for
                  -------------------
the Collateral, the security interest created hereunder and any use, possession,
maintenance,  management,  enforcement  or  collection  of  any  or  all  of the
Collateral.

     Section 4.05 Further Assurances. Upon the request of Secured Party, Pledgor
                  ------------------
shall  (at  Pledgor's   expense)  execute  and  deliver  all  such  assignments,
certificates,  instruments,  securities, financing statements,  notifications to
financial intermediaries,  clearing corporations, issuers of securities or other
third parties or other  documents and give further  assurances  and do all other
acts and  things as Secured  Party may  reasonably  request  to perfect  Secured
Party's  interest in the Collateral or to protect,  enforce or otherwise  effect
Secured Party's rights and remedies hereunder.

     Section 4.06 Rights to Sell. If Secured  Party shall  determine to exercise
                  --------------
its  rights  to  sell  all  or  any of the  Collateral  pursuant  to its  rights
hereunder,  Pledgor agrees that, upon request of Secured Party, Pledgor will, at
its own expense:

          (a) execute and deliver,  and use all reasonable efforts to cause each
issuer of the Collateral  contemplated to be sold and the directors and officers
thereof to execute and deliver,  all such  instruments and documents,  and do or
cause to be done all such other acts and things,  as may be necessary or, in the
reasonable opinion of Secured Party, advisable to register such Collateral under
the  provisions of the Securities Act of 1933, as from time to time amended (the
"Securities Act"), if such registration is, in the reasonable opinion of Secured
Party, necessary or advisable to effect a public distribution of the Collateral,
and to cause the registration statement relating thereto to become effective and
to remain  effective for such period as  prospectuses  are required by law to be
furnished, and to make all amendments and supplements thereto and to the related
prospectus  which, in the reasonable  opinion of Secured Party, are necessary or
advisable, all in conformity with the requirements of the Securities Act and the
rules and  regulations  of the  Securities  and Exchange  Commission  applicable
thereto;

          (b) use all  reasonable  efforts to qualify the  Collateral  under the
state  securities  or "Blue Sky" laws and to obtain all  necessary  governmental
approvals for the sale of the Collateral, as requested by Secured Party;

                                 Exhibit D-4-7



          (c) use all  reasonable  efforts  to cause  each  such  issuer to make
available to its security holders, as soon as practicable, an earnings statement
which will satisfy the provisions of Section 11(a) of the Securities Act; and

          (d) use all  reasonable  efforts  to do or  cause  to be done all such
others acts and things as may be necessary  to make such sale of the  Collateral
or any part thereof valid and binding and in compliance with applicable law.

Pledgor further  acknowledges  the  impossibility  of ascertaining the amount of
damages  which would be  suffered  by Secured  Party by reason of the failure by
Pledgor to perform  any of the  covenants  contained  in this  Section  4.06 and
consequently agrees that if Pledgor shall fail to perform any of such covenants,
it shall pay (to the extent permitted by law), as liquidated damages, and not as
penalty,  an  amount  (in no event to exceed  the  amount  of  Obligations  then
outstanding) equal to the value of the Collateral  affected by Pledgor's failure
to perform any of the  covenants  contained in this Section 4.06 on the date the
Secured Party shall demand compliance with this Section 4.06.

                                    ARTICLE 5

                   RIGHTS, DUTIES AND POWERS OF SECURED PARTY
                   ------------------------------------------

     The following  rights,  duties and powers of Secured  Party are  applicable
irrespective of whether an Event of Default occurs and is continuing:

     Section 5.01 Discharge  Encumbrances.   Secured  Party  may, at its option,
                  -----------------------
three (3) Business Days after  receipt by Pledgor of prior  written  notice from
Secured Party of its intent to do so,  discharge any Liens at any time levied or
placed on the Collateral  that are  prohibited by the Credit  Agreement and that
are not being contested in good faith by appropriate proceedings. Pledgor agrees
to reimburse  Secured Party within five (5) days after demand for any payment so
made, plus interest  thereon from the date of Secured Party's demand at the rate
per  annum  equal to 2% plus the rate  applicable  to ABR Loans as  provided  in
Section 3.02(a) of the Credit Agreement.

     Section 5.02 Transfer of  Collateral.  Subject  to the terms  of the Credit
                  -----------------------
Agreement,  Secured Party may transfer any or all of the  Obligations,  and upon
any such  transfer  Secured Party may transfer its interest in any or all of the
Collateral and shall be fully discharged thereafter from all liability therefor.
Any transferee of the Collateral shall be vested with all rights, powers, duties
and remedies of Secured Party hereunder.

     Section 5.03 Cumulative and Other Rights.  The rights,  powers and remedies
                  ---------------------------
of Secured Party  hereunder  are in addition to all rights,  powers and remedies
given by law or in equity.  The exercise by Secured  Party of any one or more of
the rights, powers and remedies herein shall not be construed as a waiver of any
other rights,  powers and remedies,  including,  without  limitation,  any other
rights of set-off.

     Section 5.04 Disclaimer  of Certain  Duties.   The  powers  conferred  upon
                  ------------------------------
Secured Party by this  Agreement  are to protect its interest in the  Collateral
and shall not impose any duty upon  Secured  Party to exercise  any such powers.
Pledgor  hereby agrees that Secured Party shall not be liable for, nor shall the

                                 Exhibit D-4-8



indebtedness  evidenced by the  Obligations be diminished  by,  Secured  Party's
delay or  failure  to collect  upon,  foreclose,  sell,  take  possession  of or
otherwise obtain value for the Collateral.

     Section 5.05 Custody and  Preservation  of the  Collateral.  Secured  Party
                  ---------------------------------------------
shall  be  deemed  to  have  exercised   reasonable  care  in  the  custody  and
preservation  of the  Collateral in its possession if the Collateral is accorded
treatment  substantially  equal to that which comparable  secured parties accord
comparable  collateral,  it being understood and agreed,  however,  that Secured
Party shall not have  responsibility  for (i) ascertaining or taking action with
respect to calls, conversions,  exchanges,  maturities, tenders or other matters
relative to any  Collateral,  whether or not  Secured  Party has or is deemed to
have knowledge of such matters,  or (ii) taking any necessary  steps to preserve
rights against Persons or entities with respect to any Collateral.

                                    ARTICLE 6

                                EVENTS OF DEFAULT
                                -----------------

     Section 6.01 Events.   An "Event of  Default"  (as  defined  in the  Credit
                  ------
Agreement)  which has occurred and is  continuing  shall  constitute an Event of
Default under this Agreement.

     Section 6.02 Remedies.  Upon the  occurrence and during the  continuance of
                  --------
any Event of Default, Secured Party may take any or all of the following actions
without notice or demand to Pledgor (except that Secured Party will not take any
action in the case of paragraphs  (b) and (f) below until five (5) Business Days
after  receipt by Pledgor of written  notice from Secured Party of its intent to
do so):

          (a)  Subject  to  applicable   provisions   contained  in  the  Credit
Agreement,  declare all or part of the indebtedness  pursuant to the Obligations
immediately  due and payable  and enforce  payment of the same by Pledgor or any
Obligor.

          (b)  Sell,  in one or  more  sales  and in  one or  more  parcels,  or
otherwise dispose of any or all of the Collateral in any commercially reasonable
manner as Secured Party may elect,  in a public or private  transaction,  at any
location as deemed  reasonable by Secured Party either for cash or credit or for
future  delivery at such price as Secured Party may  reasonably  deem fair,  and
(unless  prohibited by the Uniform Commercial Code, as adopted in any applicable
jurisdiction)  Secured  Party may be the  purchaser of any or all  Collateral so
sold and may apply upon the  purchase  price  therefor any  Obligations  secured
hereby.  Any such sale or transfer by Secured  Party  either to itself or to any
other  Person  shall be  absolutely  free  from any  claim of right by  Pledgor,
including any equity or right of redemption, stay or appraisal which Pledgor has
or may have  under  any rule of law,  regulation  or  statute  now  existing  or
hereafter adopted. Upon any such sale or transfer,  Secured Party shall have the
right to deliver, assign and transfer to the purchaser or transferee thereof the
Collateral  so sold  or  transferred.  If  Secured  Party  reasonably  deems  it
advisable to do so, it may restrict the bidders or  purchasers  of any such sale
or transfer to Persons or entities  who will  represent  and agree that they are
purchasing  the  Collateral  for their own  account and not with the view to the
distribution  or resale of any of the  Collateral.  Secured  Party  may,  at its
discretion, provide for a public sale, and any such public sale shall be held at
such time or times within ordinary business hours and at such place or places as

                                 Exhibit D-4-9



Secured  Party may fix in the notice of such sale.  Secured  Party  shall not be
obligated  to make any sale  pursuant  to any such  notice.  Secured  Party may,
without  notice  or   publication,   adjourn  any  public  or  private  sale  by
announcement  at any time and place  fixed for such  sale,  and such sale may be
made at any time or place to which  the same may be so  adjourned.  In the event
any sale or transfer  hereunder is not  completed or is defective in the opinion
of Secured Party,  such sale or transfer shall not exhaust the rights of Secured
Party  hereunder,  and  Secured  Party shall have the right to cause one or more
subsequent  sales  or  transfers  to be  made  hereunder.  If  only  part of the
Collateral is sold or transferred such that the Obligations  remain  outstanding
(in whole or in part),  Secured Party's rights and remedies  hereunder shall not
be exhausted, waived or modified, and Secured Party is specifically empowered to
make one or more successive sales or transfers until all the Collateral shall be
sold or transferred  and all the Obligations are paid. In the event that Secured
Party elects not to sell the  Collateral,  Secured  Party  retains its rights to
dispose of or utilize the  Collateral or any part or parts thereof in any manner
authorized  or permitted  by law or in equity,  and to apply the proceeds of the
same towards payment of the Obligations.

          (c)  Apply  proceeds  of  the  disposition  of the  Collateral  to the
Obligations  in any manner elected by Secured Party and permitted by the Code or
otherwise permitted by law or in equity.  Such application may include,  without
limitation,  the  reasonable  attorneys'  fees and legal  expenses  incurred  by
Secured Party.

          (d) Appoint  any Person as agent to perform any act or acts  necessary
or incident to any sale or transfer by Secured Party of the Collateral.

          (e) Receive, change the address for delivery, open and dispose of mail
addressed to Pledgor,  and to execute,  assign and endorse  negotiable and other
instruments  for the payment of money,  documents of title or other evidences of
payment,  shipment or storage for any form of Collateral on behalf of and in the
name of Pledgor.

          (f)  Exercise  all other  rights and  remedies  permitted by law or in
equity.

     Section 6.03 Attorney-in-Fact.  Pledgor hereby irrevocably appoints Secured
                  ----------------
Party as Pledgor's attorney-in-fact,  with full authority in the place and stead
of Pledgor and in the name of Pledgor or otherwise, from time to time in Secured
Party's discretion upon the occurrence and during the continuance of an Event of
Default,  but at  Pledgor's  cost and  expense,  three (3)  Business  Days after
receipt by Pledgor of written  notice from Secured Party of its intent to do so,
to take  any  action  and to  execute  any  assignment,  certificate,  financing
statement, stock power, notification, document or instrument which Secured Party
may deem  necessary or advisable to accomplish  the purposes of this  Agreement,
including,  without limitation,  to receive, endorse and collect all instruments
made payable to Pledgor  representing  any dividend,  interest  payment or other
distribution  in respect of the  Collateral or any part thereof and to give full
discharge for the same.

     Section 6.04 Liability for Deficiency.  If any sale or other disposition of
                  ------------------------
Collateral by Secured Party in compliance with the Loan Documents and applicable
law or any other action of Secured Party  hereunder in compliance  with the Loan
Documents  and  applicable  law results in  reduction of the  Obligations,  such
action will not release  Pledgor  from its  liability  to Secured  Party for any

                                 Exhibit D-4-10



unpaid  Obligations,  including (to the extent permitted by law) costs,  charges
and expenses  incurred in the liquidation of Collateral,  together with interest
thereon until paid at the rate per annum equal to 2% plus the rate applicable to
ABR Loans as provided in Section 3.02(a) of the Credit  Agreement,  and the same
shall be immediately due and payable to Secured Party at Secured Party's address
set forth in the opening paragraph hereof.

     Section 6.05 Reasonable  Notice.   If any  applicable  provision of any law
                  ------------------
requires  Secured Party to give reasonable  notice of any sale or disposition or
other action,  Pledgor  hereby agrees that ten days' prior written  notice shall
constitute  reasonable notice thereof.  Such notice, in the case of public sale,
shall  state the time and place  fixed for such sale and, in the case of private
sale, the time after which such sale is to be made.

     Section 6.06 Pledged  Securities.  Upon both (i) the  occurrence and during
                  -------------------
the  continuance  of an Event of Default and (ii) either (a) the Loans  becoming
due and  payable at their  stated  maturity  and not paid,  (b) the Loans  being
declared due and payable pursuant to Article X of the Credit  Agreement,  or (c)
Secured Party giving prior written  notice to Pledgor of Secured  Party's intent
to exercise its rights under Section 6.02:

          (a) All  rights of  Pledgor  to receive  the  dividends  and  interest
payments which it would  otherwise be authorized to receive and retain  pursuant
to Section 4.02 shall cease,  and all such rights shall thereupon  become vested
in Secured Party who shall  thereupon have the sole right to receive and hold as
Collateral such dividends and interest payments, but Secured Party shall have no
duty to receive and hold such  dividends and interest  payments and shall not be
responsible for any failure to do so or delay in so doing.

          (b) All dividends and interest  payments which are received by Pledgor
contrary to the  provisions  of this Section 6.06 shall be received in trust for
the benefit of Secured  Party,  shall be segregated  from other funds of Pledgor
and shall be promptly  paid over to Secured Party as Collateral in the same form
as so received (with any necessary endorsement).

          (c)  Secured  Party may  exercise  any and all  rights of  conversion,
exchange,  subscription or any other rights, privileges or options pertaining to
any  of the  Pledged  Securities  as if it  were  the  absolute  owner  thereof,
including without limitation,  the right to exchange at its discretion,  any and
all of the Pledged  Securities upon the merger,  consolidation,  reorganization,
recapitalization  or other readjustment of any issuer of such Pledged Securities
or upon the exercise by any such issuer or Secured Party of any right, privilege
or  option  pertaining  to any  of  the  Pledged  Securities  and in  connection
therewith, to deposit and deliver any and all of the Pledged Securities with any
committee, depository, transfer agent, registrar or other designated agency upon
such terms and conditions as it may determine,  all without  liability except to
account for property  actually  received by it, but Secured  Party shall have no
duty to exercise any of the  aforesaid  rights,  privileges or options and shall
not be responsible for any failure to do so or delay in so doing.

     Section 6.07 Non-judicial  Enforcement.  To  the  extent  permitted by law,
                  -------------------------
Secured Party may enforce its rights hereunder without prior judicial process or
judicial  hearing,  and to the extent permitted by law Pledgor  expressly waives
any and all legal rights which might otherwise  require Secured Party to enforce
its rights by judicial process.

                                 Exhibit D-4-11



                                    ARTICLE 7

                            MISCELLANEOUS PROVISIONS
                            ------------------------

     Section 7.01 Notices. Any notice required or permitted to be given under or
                  -------
in  connection  with this  Agreement  shall be in writing and shall be mailed by
first  class or  express  mail,  postage  prepaid,  or sent by telex,  telegram,
telecopy or other  similar  form of rapid  written  transmission  or  personally
delivered to the receiving party. All such communications  shall be mailed, sent
or delivered  at the address  respectively  indicated  in the opening  paragraph
hereof or at such other  address as either  party may have  furnished  the other
party in writing.  Any  communication so addressed and mailed shall be deemed to
be given upon receipt, any notice so sent by rapid written transmission shall be
deemed to be given when  receipt of such  transmission  is  acknowledged  by the
receiving  operator or equipment,  and any  communication so delivered in person
shall be deemed to be given when  receipted for or actually  received by Pledgor
or Secured Party, as the case may be.

     Section 7.02 Amendments and Waivers.  Secured Party's acceptance of partial
                  ----------------------
or delinquent payments or any forbearance,  failure or delay by Secured Party in
exercising any right,  power or remedy hereunder shall not be deemed a waiver of
any  obligation of Pledgor or any Obligor,  or of any right,  power or remedy of
Secured  Party;  and no partial  exercise  of any right,  power or remedy  shall
preclude any other or further  exercise  thereof.  Secured  Party may remedy any
Event of Default hereunder or in connection with the Obligations without waiving
the Event of Default so remedied.  Pledgor  hereby  agrees that if Secured Party
agrees to a waiver of any provision  hereunder,  or an exchange of or release of
the Collateral,  or the addition or release of any Obligor or other Person,  any
such action shall not constitute a waiver of any of Secured Party's other rights
or of Pledgor's obligations hereunder.  This Agreement may be amended only by an
instrument in writing  executed  jointly by Pledgor and Secured Party and may be
supplemented  only by documents  delivered or to be delivered in accordance with
the express terms hereof.

     Section 7.03 Copy as Financing Statement. A photocopy or other reproduction
                  ---------------------------
of this  Agreement may be delivered by Pledgor or Secured Party to any financial
intermediary  or other third party for the purpose of transferring or perfecting
any or all of the  Pledged  Securities  to  Secured  Party  or its  designee  or
assignee.

     Section 7.04 Possession  of  Collateral.   Secured Party shall be deemed to
                  --------------------------
have  possession of any  Collateral in transit to it or set apart for it (or, in
either case, any of its agents, affiliates or correspondents).

     Section 7.05 Redelivery  of  Collateral.  If  any   sale  or   transfer  of
                  --------------------------
Collateral by Secured Party results in full satisfaction of the Obligations, and
after such sale or transfer and  discharge  there remains a surplus of proceeds,
Secured  Party will  deliver to Pledgor such excess  proceeds in a  commercially
reasonable  time;  provided,  however,  that  Secured  Party  shall not have any
liability  for any  interest,  cost or expense in  connection  with any delay in
delivering such proceeds to Pledgor.

                                 Exhibit D-4-12



     Section 7.06 Governing Law;  Jurisdiction.  This Agreement and the security
                  ----------------------------
interest  granted  hereby shall be construed in accordance  with and governed by
the laws of the State of Texas  (except to the extent that the laws of any other
jurisdiction  govern the  perfection  and  priority  of the  security  interests
granted hereby).

     Section 7.07 Continuing Security Agreement.
                  -----------------------------

          (a) Except as otherwise provided by applicable law (including, without
limitation,  Section  9.620 of the Code),  no action taken or omission to act by
Secured Party hereunder,  including,  without limitation, any exercise of voting
or  consensual  rights  pursuant to Section  6.06 or any other  action  taken or
inaction  pursuant to Section 6.02, shall be deemed to constitute a retention of
the  Collateral in  satisfaction  of the  Obligations or otherwise to be in full
satisfaction of the Obligations,  and the Obligations shall remain in full force
and effect, until Secured Party shall have applied payments (including,  without
limitation,  collections  from  Collateral)  towards the Obligations in the full
amount then outstanding or until such subsequent time as is hereinafter provided
in subsection (b) below.

          (b) To the extent that any payments on the  Obligations or proceeds of
the  Collateral  are  subsequently  invalidated,  declared to be  fraudulent  or
preferential,  set  aside or  required  to be  repaid  to a  trustee,  debtor in
possession,  receiver or other Person under any  bankruptcy  law,  common law or
equitable  cause,  then to such extent the  Obligations  so  satisfied  shall be
revived and  continue as if such  payment or proceeds  had not been  received by
Secured  Party,  and Secured  Party's  security  interests,  rights,  powers and
remedies  hereunder shall continue in full force and effect. In such event, this
Agreement shall be  automatically  reinstated if it shall  theretofore have been
terminated pursuant to Section 7.08.

     Section 7.08 Termination.  The grant of a security  interest  hereunder and
                  -----------
all of Secured Party's rights, powers and remedies in connection therewith shall
remain in full force and effect until  Secured Party has (i)  retransferred  and
delivered  all  Collateral  in its  possession  to Pledgor,  and (ii) executed a
written  release or  termination  statement and  reassigned  to Pledgor  without
recourse or warranty any remaining  Collateral and all rights  conveyed  hereby.
Upon (i) the complete payment of the Obligations (other than any indemnity which
is not yet due and payable),  (ii) the expiration of all outstanding  Letters of
Credit,  and (iii) the  termination of the  Commitments,  Secured Party,  at the
written request and expense of Pledgor, will release,  reassign and transfer the
Collateral  to Pledgor and declare this  Agreement to be of no further  force or
effect.  Notwithstanding  the  foregoing,  Section  4.04 and the  provisions  of
subsection 7.07(b) shall survive the termination of this Agreement.

     Section 7.09 Counterparts; Effectiveness. This Agreement may be executed in
                  ---------------------------
two or more counterparts.  Each counterpart is deemed an original,  but all such
counterparts  taken  together  constitute  one and  the  same  instrument.  This
Agreement becomes effective upon the execution hereof by Pledgor and delivery of
the same to Secured Party,  and it is not necessary for Secured Party to execute
any acceptance hereof or otherwise signify or express its acceptance hereof.

     Section 7.10 Limitation by Law. All rights, remedies and powers provided in
                  -----------------
this  Agreement  may be exercised  only to the extent that the exercise  thereof

                                 Exhibit D-4-13



does not violate any applicable provision of law, and all the provisions of this
Agreement are intended to be subject to all applicable  mandatory  provisions of
law which may be controlling  and to be limited to the extent  necessary so that
they shall not render  this  Agreement  invalid,  unenforceable,  in whole or in
part, or not entitled to be recorded,  registered or filed under the  provisions
of any applicable law.

     Section 7.11 Interest. It is the intention of the parties hereto to conform
                  --------
strictly to usury laws  applicable to Secured Party or any Lender.  Accordingly,
if the transactions contemplated hereby would be usurious under applicable state
or federal law, then, notwithstanding anything to the contrary in this Agreement
or in any other Loan Document, it is agreed as follows: (i) the aggregate of all
consideration  which constitutes  interest under law applicable to Secured Party
or any Lender that is contracted for, taken, reserved, charged or received under
the Obligations, this Agreement or under any other Loan Document or otherwise in
connection with the Obligations shall under no circumstances  exceed the maximum
amount allowed by such  applicable  law, (ii) in the event that the mat urity of
the Obligations is accelerated  for any reason,  or in the event of any required
or permitted prepayment, then such consideration that constitutes interest under
law  applicable  to Secured Party or any Lender may never include more than such
maximum  amount,  and  (iii)  excess  interest,  if  any,  provided  for in this
Agreement, any other Loan Document or otherwise shall be cancelled automatically
and, if  theretofore  paid,  shall be credited by Secured Party on the principal
amount of the  Obligations  (or, to the extent that the principal  amount of the
Obligations  shall  have  been or would  thereby  be paid in full,  refunded  by
Secured  Party to Pledgor,  or to the  Company,  as  appropriate).  The right to
accelerate  the  maturity  of the  Obligations  does not  include  the  right to
accelerate  any  interest  which has not  otherwise  accrued on the date of such
acceleration,  and neither  Secured  Party nor any Lender  intend to collect any
unearned  interest in the event of  acceleration.  All sums paid or agreed to be
paid to Secured  Party or any Lender for the use,  forbearance  or  detention of
sums  included in the initial  Obligations  shall,  to the extent  permitted  by
applicable law, be amortized, prorated, allocated and spread throughout the full
term of the  Obligations  until  payment  in full so that the rate or  amount of
interest on account of the initial  Obligations  does not exceed the  applicable
usury ceiling, if any.

                         [Signatures begin on next page]

                                 Exhibit D-4-14



PLEDGOR:                NANCE PETROLEUM CORPORATION



                        By:   _______________________________________
                              David W. Honeyfield
                              Vice President - Finance





SECURED PARTY:          WACHOVIA BANK, NATIONAL
                                 ASSOCIATION, as Administrative Agent



                        By:   _______________________________________
                        Name: Philip J. Trinder
                        Title:Vice President



                                 Exhibit D-4-16





                                    EXHIBIT A


                               PLEDGED SECURITIES
                               ------------------



1.   NPC Inc., a Colorado  corporation  -- 100 shares of the common stock of NPC
     Inc., registered in the name of Nance Petroleum Corporation on the books of
     NPC Inc., as represented by Certificate No. 001.



                                 Exhibit D-4-16




                                    EXHIBIT E
                        FORM OF ASSIGNMENT AND ASSUMPTION


     Reference is made to the Amended and Restated Credit  Agreement dated as of
April  7,  2005 (as  amended  and in  effect  on the date  hereof,  the  "Credit
                                                                          ------
Agreement"),  among St. Mary Land &  Exploration  Company, the Lenders named
- ---------
therein and Wachovia Bank, National Association, as Administrative Agent for the
Lenders.  Terms  defined in the Credit  Agreement  are used herein with the same
meanings.

     The Assignor named on the reverse hereof hereby sells and assigns,  without
recourse,  to the Assignee named on the reverse hereof,  and the Assignee hereby
purchases and assumes, without recourse, from the Assignor,  effective as of the
Assignment Date set forth on the reverse hereof,  the interests set forth on the
reverse  hereof  (the  "Assigned   Interest")  in  the  Assignor's   rights  and
                        -------------------
obligations  under the Credit  Agreement,  including,  without  limitation,  the
interests set forth on the reverse  hereof in the  Commitment of the Assignor on
the Assignment Date and Loans owing to the Assignor which are outstanding on the
Assignment Date,  together with the  participations  in Letters of Credit and LC
Disbursements held by the Assignor on the Assignment Date, but excluding accrued
interest and fees to and  excluding the  Assignment  Date.  The Assignee  hereby
acknowledges  receipt  of a copy of the  Credit  Agreement.  From and  after the
Assignment  Date  (i) the  Assignee  shall  be a party  to and be  bound  by the
provisions of the Credit Agreement and, to the extent of the Assigned  Interest,
have the rights and  obligations  of a Lender  thereunder  and (ii) the Assignor
shall,  to the extent of the  Assigned  Interest,  relinquish  its rights and be
released from its obligations under the Credit Agreement.

     This  Assignment  and Assumption is being  delivered to the  Administrative
Agent together with (i) if the Assignee is a Foreign Lender,  any  documentation
required to be  delivered  by the  Assignee  pursuant to Section  5.03(e) of the
Credit Agreement,  duly completed and executed by the Assignee,  and (ii) if the
Assignee is not already a Lender under the Credit  Agreement,  an Administrative
Questionnaire in the form supplied by the  Administrative  Agent, duly completed
by the Assignee.  The Assignor  shall pay the fee payable to the  Administrative
Agent pursuant to Section 12.04(b) of the Credit Agreement.

     This  Assignment  and  Assumption  shall be  governed by and  construed  in
accordance with the laws of the State of Texas.

Date of Assignment:

Legal Name of Assignor:

Legal Name of Assignee:

Assignee's Address for Notices:

Effective Date of Assignment

("Assignment Date"):
  ---------------

                                  Exhibit E-1



======================================= =============================== ===================================
                                                                        Percentage       Assigned       of
                                                                        Facility/Commitment   (set  forth,
                                                                        to  at  least  8  decimals,  as  a
                                                                        percentage  of  the  Facility  and
                                                                        the aggregate  Commitments  of all
Facility                                Principal Amount Assigned       Lenders thereunder)
- --------                                                                        ----------
- --------------------------------------- ------------------------------- -----------------------------------
Commitment Assigned:                    $                                        %
- --------------------------------------- ------------------------------- -----------------------------------
Loans:
- --------------------------------------- ------------------------------- -----------------------------------

======================================= =============================== ===================================


The terms set forth above and on the reverse side hereof are hereby agreed to:

                        [Name of Assignor], as Assignor
                         ----------------

                        By:____________________________________
                        Name:
                        Title:


                        [Name of Assignee], as Assignee
                         ----------------

                        By: ___________________________________
                        Name:
                        Title:


                                  Exhibit E-2



The undersigned hereby consent to the within assignment:1

St. Mary Land & Exploration Company      Wachovia Bank, National
                                             Association, as Administrative
                                             Agent,


By: ______________________                   By: __________________________
Name:                                        Name:
Title:                                       Title:]



________________________
1 Consents to be included to the extent required by Section 9.04(b) of the
  Credit Agreement

                                  Exhibit E-3



                                   EXHIBIT F-1
                     FORM OF COMMITMENT INCREASE CERTIFICATE




                                 [   ], 200[ ]

To:  Wachovia Bank, National Association,
     as Administrative Agent

     The  Borrower,  the  Administrative  Agent and the other Agents and certain
Lenders have heretofore  entered into an Amended and Restated Credit  Agreement,
dated  as of  April  7,  2005,  as  amended  from  time  to  time  (the  "Credit
                                                                          ------
Agreement").  Capitalized  terms not  otherwise  defined  herein  shall have the
- ---------
meaning given to such terms in the Credit Agreement.

     This Commitment Increase Certificate is being delivered pursuant to Section
2.06(c) of the Credit Agreement.

     Please  be  advised  that  the  undersigned  has  agreed  to  increase  its
Commitment  under the Credit  Agreement  effective [ ], 200[ ] from $[ ] to $[ ]
and (b)  that it  shall  continue  to be a party in all  respect  to the  Credit
Agreement and the other Loan Documents.

     The [Borrower/Lender] shall pay the fee payable to the Administrative Agent
pursuant to Section 2.06(c)(ii) of the Credit Agreement.

                              Very truly yours,

                              [                                ]



                              By: ______________________________
                                Name: __________________________
                                Title: _________________________


                                 Exhibit F-1-1





Accepted and Agreed:

Wachovia Bank, National Association,
  as Administrative Agent



By: _____________________________
  Name: _________________________
  Title: ________________________



Accepted and Agreed:

St. Mary Land & Exploration Company



By: _____________________________
  Name: _________________________
  Title: ________________________




                                 Exhibit F-1-2




                                   EXHIBIT F-2
                      FORM OF ADDITIONAL LENDER CERTIFICATE




                                 [   ], 200[ ]


To:  Wachovia Bank, National Association
     as Administrative Agent

     The  Borrower,  the  Administrative  Agent and the other Agents and certain
Lenders have heretofore  entered into an Amended and Restated Credit  Agreement,
dated  as of  April  7,  2005,  as  amended  from  time  to  time  (the  "Credit
                                                                          ------
Agreement").  Capitalized  terms not  otherwise  defined  herein  shall have the
- ---------
meaning given to such terms in the Credit Agreement.

     This Additional Lender  Certificate is being delivered  pursuant to Section
2.06(c) of the Credit Agreement.

     Please be advised  that the  undersigned  has agreed (a) to become a Lender
under the Credit  Agreement  effective [ ], 200[ ] with a Commitment of $[ ] and
(b) that it shall be a party in all  respect  to the  Credit  Agreement  and the
other Loan Documents.

     This Additional Lender Certificate is being delivered to the Administrative
Agent  together  with (i) if the  Additional  Lender  is a Foreign  Lender,  any
documentation  required to be delivered by such  Additional  Lender  pursuant to
Section  5.03(e) of the Credit  Agreement,  duly  completed  and executed by the
Additional Lender, and (ii) an Administrative Questionnaire in the form supplied
by the  Administrative  Agent,  duly  completed by the  Additional  Lender.  The
[Borrower/Additional  Lender]  shall pay the fee  payable to the  Administrative
Agent pursuant to Section 2.06(c)(ii) of the Credit Agreement.

                              Very truly yours,

                              [                                ]



                              By: ______________________________
                                Name: __________________________
                                Title: _________________________


                                 Exhibit F-2-1





Accepted and Agreed:

Wachovia Bank, National Association,
  as Administrative Agent



By: _____________________________
  Name: _________________________
  Title: ________________________



Accepted and Agreed:

St. Mary Land & Exploration Company



By: _____________________________
  Name: _________________________
  Title: ________________________




                                 Exhibit F-2-2





                                  SCHEDULE 7.05
                                   LITIGATION


                                      NONE


                                Schedule 7.05-1




                                  SCHEDULE 7.15
            SUBSIDIARIES AND PARTNERSHIPS; NON-MATERIAL SUBSIDIARIES


- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
                                                                        Principal Place
                                                                        ---------------
                                        Jurisdiction   Organizational     of Business
                                        ------------   --------------     -----------
                                            of         Identification      and Chief                          Percentage
                                            --         --------------      ---------                          ----------
         Material Subsidiaries          Organization       Number       Executive Office       Owner              Owned
         ---------------------          ------------       ------       ----------------       -----              -----
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
Nance Petroleum Corporation ("Nance")     Montana                                              Borrower           100%
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
St. Mary Energy Company                   Delaware                                             Borrower           100%
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
NPC Inc.2                                 Colorado                                              Nance             100%
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
       Non-Material Subsidiaries
       -------------------------
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
Hilltop Investment Partners               Colorado                                             Borrower            50%
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
St. Mary East Texas LP                     Texas                                            SMT Texas LLC          99%
                                                                                               Borrower
                                                                                                                    1%
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
Four Winds Marketing LLC                  Colorado                                             Borrower           100%
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
Box Church Gas Gathering LLC              Colorado                                             Borrower       58.6754%
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
Trinity River Services LLC                 Texas                                               Borrower            25%
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
Sycamore Gas System                       Oklahoma                                             Borrower          3.11%
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
SMT Texas LLC                              Texas                                               Borrower           100%
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
SMEC Texas LLC                             Texas                                           St. Mary Energy        100%
                                                                                               Company
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------
SMEC LP                                    Texas                                             SMEC Texas LLC         99%

                                                                                           St. Mary Energy
                                                                                               Company              1%
- -------------------------------------- -------------- ---------------- ------------------ ------------------ -------------

________________________
2 Will be merged into Nance by the end of June 2005.


                                Schedule 7.15-1



                                  SCHEDULE 7.19
                                 GAS IMBALANCES




                                      NONE


                                Schedule 7.19-1




                                  SCHEDULE 7.20
                               MARKETING CONTRACTS

                                      NONE

                                Schedule 7.20-1




                                  SCHEDULE 7.21
                                 SWAP AGREEMENTS

                                Schedule 7.21-1



GAS SWAPS
                                                                                            Remaining              Estimtd
                Contract                                         Contract Contract Monthly    Yearly   % of  Fixed Market MtM Value
CounterParty      Date   Contract # Price Index Purpose Area      Start     End    Volumes   Volumes  Hedges Price  Price at 4/5/2005
- ------------      ----   ---------- ----------- ------- ----      -----     ---    -------   -------  ------ -----  ----- -----------

JPMorgan        04/05/04 04NG25418  ANR         General MidCon   04/01/05 05/31/05   22,000    44,000        $5.65  $6.78    (49,908)
JPMorgan        10/01/04 742662     Reliant     Nemours Arklatex 04/01/05 12/31/05  114,444 1,030,000        $6.16  $7.48 (1,354,779)
                                      N/S         Acq.
JPMorgan        10/20/04 794404     ANR         General MidCon   04/01/05 12/31/05   40,000   360,000        $6.55  $7.30   (272,089)
JPMorgan        03/07/05 917381     ANR         General MidCon   05/01/05 12/31/05   50,000   400,000        $6.63  $7.39   (304,329)
JPMorgan        03/14/05 921825     ANR         General MidCon   06/01/05 12/31/05   50,000   350,000        $6.96  $7.46   (172,751)
JPMorgan        03/31/05 1010116    ANR         General MidCon   06/01/05 12/31/05   50,000   350,000        $7.48  $7.46      5,145
                                                                                   ------------------
                                                                                    326,444 2,534,000 34.14%
                                                                                   ------------------

BNP Paribas     04/01/04 64502      ANR         General MidCon   04/01/05 05/31/05   22,000    44,000        $5.64  $6.78    (50,347)
BNP Paribas     10/01/04 71816      IF PEPL     Agate   MidCon   04/01/05 12/31/05  103,333   930,000        $5.96  $7.29 (1,237,483)
                                                  Acq.
BNP Paribas     10/08/04 72148      IF Reliant  Nemours Arklatex 04/01/05 12/31/05   20,000   180,000        $6.52  $7.49   (174,065)
                                      N/S         Acq.
BNP Paribas     10/22/04 72840      IF ANR OK   General MidCon   04/01/05 12/31/05   40,000   360,000        $6.80  $7.31   (183,110)
BNP Paribas     03/18/05 79250      IF ANR OK   General MidCon   06/01/05 12/31/05   50,000   350,000        $7.17  $7.46   (100,671)
                                                                                   ------------------
                                                                                    235,333 1,864,000 25.12%
                                                                                   ------------------

J Aron & Co     03/15/04 WNP0CPC    ANR         General MicCon   04/01/05 04/30/05   22,000    22,000        $5.57  $6.60    (22,768)
J Aron & Co     03/11/04 WNP0CC8    ANR         General MicCon   04/01/05 04/30/05   20,800    20,800        $5.50  $6.60    (22,878)
J Aron & Co     03/31/04 WNP0EYH    ANR         General MicCon   04/01/05 05/31/05   22,000    44,000        $5.60  $6.78    (52,105)
J Aron & Co     05/11/04 WNP0LNT    ANR         General MicCon   04/01/05 05/31/05   22,000    44,000        $6.00  $6.78    (34,528)
J Aron & Co     04/07/04 WNP0FZY    ANR         General MicCon   04/01/05 05/31/05   22,000    44,000        $5.61  $6.78    (51,665)
J Aron & Co     06/24/04 WNP0SV0    ANR         General MicCon   04/01/05 07/31/05   25,000   100,000        $6.12  $6.99    (87,295)
J Aron & Co     10/07/04 WNP1BYO    ANR         General MicCon   04/01/05 12/31/05   40,000   360,000        $6.33  $7.30   (348,818)
J Aron & Co     10/21/04 WNP1EPD    ANR         General MicCon   04/01/05 12/31/05   40,000   360,000        $6.69  $7.30   (222,668)
J Aron & Co     03/02/05 WNP1Y1H    ANR         General MicCon   05/01/05 12/31/05   50,000   400,000        $6.51  $7.39   (354,164)
                                                                                   ------------------
                                                                                    263,800 1,394,800 18.79%
                                                                                   ------------------

Calyon          03/12/04 NY1987     ANR         General MidCon   04/01/05 04/30/05   20,800    20,800        $5.49  $6.60    (23,086)
Calyon          04/28/04 NY2212     ANR         General MidCon   04/01/05 05/31/05   22,000    44,000        $5.70  $6.78    (47,711)
Calyon          04/08/04 NY2110     ANR         General MidCon   04/01/05 05/31/05   22,000    44,000        $5.68  $6.78    (48,590)
Calyon          10/13/04 2851       ANR         General MidCon   04/01/05 12/31/05   40,000   360,000        $6.34  $7.30   (344,557)
Calyon          10/26/04 2901       ANR         General MidCon   04/01/05 12/31/05   50,000   450,000        $6.78  $7.30   (234,627)
Calyon          03/08/05 NY3376     ANR         General MidCon   06/01/05 12/31/05   50,000   350,000        $6.83  $7.45   (220,384)
                                                                                   ------------------
                                                                                    204,800 1,268,800 17.10%
                                                                                   ------------------

Wachovia        10/19/04 1005663    ANR         General MidCon   04/01/05 12/31/05   40,000   360,000  4.85% $6.38  $7.30   (330,226)

- ------------------------------------------------------------------------------------------------------------------------- -----------
Total GAS SWAPS - 2005                                                            1,070,378 7,421,600        $6.48  $7.34 (6,340,457)
========================================================================================================================= ===========

JPMorgan        10/01/04 742662     Reliant     Nemours Arklatex 01/01/06 10/31/06  105,000 1,050,000        $5.91  $7.37 (1,534,249)
                                      N/S         Acq.
JPMorgan        03/07/05 917381     ANR         General MidCon   01/01/06 04/30/06   50,000   200,000        $7.07  $7.82   (150,729)
JPMorgan        03/14/05 921825     ANR         General MidCon   01/01/06 04/30/06   50,000   200,000        $7.35  $7.83    (97,537)
JPMorgan        03/31/05 1010116    ANR         General MidCon   01/01/06 05/31/06   50,000   250,000        $7.60  $7.64     (8,478)
                                                                                   ------------------
                                                                                    255,000 1,700,000 46.70%
                                                                                   ------------------

BNP Paribas     10/01/04 71816      IF PEPL     Agate   MidCon   01/01/06 10/31/06  110,000 1,100,000        $5.64  $7.14 (1,651,258)
                                                  Acq.
BNP Paribas     10/08/04 72148      IF Reliant  Nemours Arklatex 01/01/06 12/31/06   20,000   240,000        $6.10  $7.37   (305,080)
                                      N/S         Acq.
BNP Paribas     03/18/05 79250      IF ANR OK   General MicCon   01/01/06 04/30/06   50,000   200,000        $7.44  $7.84    (78,905)
                                                                                   ------------------
                                                                                    180,000 1,540,000 42.31%
                                                                                   ------------------

Calyon          03/08/05 NY3376     ANR         General MidCon   01/01/06 04/30/06   50,000   200,000        $7.293  $7.83  (107,674)
                                                                                   ------------------
                                                                                     50,000   200,000  5.49%
                                                                                   ------------------

J Aron & Co     03/02/05 WNP1Y1H    ANR         General MicCon   01/01/06 04/30/06   50,000   200,000        $6.948  $7.82  (174,468)
                                                                                   ------------------
                                                                                     50,000   200,000  5.49%
                                                                                   ------------------

- ------------------------------------------------------------------------------------------------------------------------- -----------
Total GAS SWAPS - 2006                                                              535,000 3,640,000        $6.32  $7.44 (4,108,378)
========================================================================================================================= ===========

GAS COLLARS

JP Morgan       06/25/04 4NG26442   ANR         General MidCon   04/01/05 07/31/05   25,000   100,000        $5.500 $5.493       689
                         -43(FLOOR
JP Morgan       06/25/04 4NG26442   ANR         General MidCon   04/01/05 07/31/05  (25,000) (100,000)       $6.810 $6.406   (40,373)
                         -43(CAP)
JP Morgan       06/02/04 4NG26257   ANR         General MidCon   04/01/05 06/30/05   25,000    75,000        $5.750 $5.741       647
                         -58(FLOOR)
JP Morgan       06/02/04 4NG26257   ANR         General MidCon   04/01/05 06/30/05  (25,000)  (75,000)       $6.890 $6.627   (19,759)
                         -58(CAP)
JP Morgan       09/29/04 39518      ANR         General MidCon   04/01/05 12/31/05   40,000   360,000        $5.750 $5.692    21,016
                         (FLOOR)
JP Morgan       09/29/04 39518      ANR         General MidCon   04/01/05 12/31/05  (40,000) (360,000)       $7.300 $6.733  (204,237)
                         (CAP)
JP Morgan       10/06/04 51671      ANR         General MidCon   04/01/05 12/31/05   40,000   360,000        $5.611 $5.557    19,648
                         (FLOOR)
JP Morgan       10/06/04 51671      ANR         General MidCon   04/01/05 12/31/05  (40,000) (360,000)       $7.067 $6.407  (237,597)
                         (CAP)

J Aron & Co     10/28/04 PP16T      ANR         General MidCon   04/01/05 12/31/05   50,000   450,000        $6.111 $5.996    51,957
                             (FLOOR)
J Aron & Co     10/28/04 PP16T      ANR         General MidCon   04/01/05 12/31/05  (50,000) (450,000)       $7.839 $7.455  (172,552)
                             (CAP)

- ------------------------------------------------------------------------------------------------------------------------ ------------
Total GAS COLLARS - 2005                                                                                                    (580,561)
======================================================================================================================== ============

                                Schedule 7.21-1




                                  SCHEDULE 7.24
                               MATERIAL AGREEMENTS

1.   Indenture  Agreement dated as of March 13, 2002 between St. Mary Land &
     Exploration Company and Wells Fargo Bank West, N.A. for the Company's 5.75%
     Senior Convertible Notes due 2022.

2.   And the  agreements  set forth on the exhibit list to the Company's  Annual
     Report on Form 10-K for the year  ended  December  31,  2004,  as  material
     contracts included as exhibits 10.1 through 10.48.



                                Schedule 7.24-1




                                SCHEDULE 9.05(a)
                                   INVESTMENTS



                                      NONE

                               Schedule 9.05(a)-1




                                SCHEDULE 9.05(h)
                     EXISTING INVESTMENTS (NON-OIL AND GAS)

1.   50%   general   partnership   interest  in  Hilltop   Investments   holding
     approximately 41 acres of undeveloped land in Jefferson County at C-470 and
     Quincy.

2.   Residual net profits  interest in land located in Grand Junction,  Colorado
     if reclaimed by gravel  operator and sold as lots in  Mid-America  Business
     Park, a rail served industrial park.




                               Schedule 9.05(h)-1

EX-10

                                                                    EXHIBIT 10.2

                     AMENDED AND RESTATED GUARANTY AGREEMENT


                                       by


                             ST. MARY ENERGY COMPANY


                                   in favor of


                      WACHOVIA BANK, NATIONAL ASSOCIATION,
                             AS ADMINISTRATIVE AGENT



                                  April 7, 2005





                                TABLE OF CONTENTS
                                -----------------

                                                                            Page

ARTICLE 1 General Terms........................................................2
  Section 1.1       Terms Defined Above........................................2
  Section 1.2       Certain Definitions........................................2
  Section 1.3       Credit Agreement Definitions...............................3

ARTICLE 2 The Guaranty.........................................................3
  Section 2.1       Liabilities Guaranteed.....................................3
  Section 2.2       Nature of Guaranty.........................................4
  Section 2.3       Administrative Agent's Rights..............................4
  Section 2.4       Guarantor's Waivers........................................4
  Section 2.5       Maturity of Liabilities; Payment...........................5
  Section 2.6       Administrative Agent's Expenses............................5
  Section 2.7       Liability..................................................5
  Section 2.8       Events and Circumstances Not Reducing or Discharging
                    Guarantor's Obligations....................................5
  Section 2.9       Right of Subrogation and Contribution......................7

ARTICLE 3 Representations and Warranties.......................................8
  Section 3.1       By Guarantor...............................................8
  Section 3.2       No Representation by Lenders...............................8

ARTICLE 4 Subordination of Indebtedness........................................9
  Section 4.1       Subordination of All Guarantor Claims......................9
  Section 4.2       Claims in Bankruptcy.......................................9
  Section 4.3       Payments Held in Trust.....................................9
  Section 4.4       Liens Subordinate..........................................9
  Section 4.5       Notation of Records.......................................10

ARTICLE 5 Miscellaneous.......................................................10
  Section 5.1       Successors and Assigns....................................10
  Section 5.2       Notices...................................................10
  Section 5.3       Business and Financial Information........................10
  Section 5.4       Choice of Law.............................................10
  Section 5.5       Invalidity................................................10
  SECTION 5.6       ENTIRE AGREEMENT..........................................10

                                      -i-



                     AMENDED AND RESTATED GUARANTY AGREEMENT
                     ---------------------------------------

         THIS AMENDED AND RESTATED GUARANTY AGREEMENT (this "Guaranty
                                                             --------
Agreement") made by the undersigned guarantor (hereinafter called "Guarantor"),
- ---------                                                          ---------
is in favor of Wachovia Bank, National Association, as Administrative Agent (the
"Administrative Agent") for the lenders (the "Lenders") signatory to the Credit
 --------------------                         -------
Agreement defined below.

                                R E C I T A L S:
                                ----------------

         A. Pursuant to that certain Credit Agreement dated as of January 27,
2003, among St. Mary Land & Exploration Company, a Delaware corporation
(hereinafter called the "Borrower"), the Administrative Agent, and the lenders
                         --------
party thereto (the "Existing Lenders") (such Credit Agreement, as amended and
                    ----------------
supplemented, the "Existing Credit Agreement"), the Borrower received certain
                   -------------------------
loans and extensions of credit under a revolving credit facility made available
to the Borrower under the Existing Credit Agreement, up to the aggregate
principal amount of $300,000,000.

         B. The Existing Lenders conditioned their obligations under the
Existing Credit Agreement upon the execution and delivery by Guarantor of that
certain Guaranty Agreement dated as of January 27, 2003 (the "Existing Guaranty
                                                              -----------------
Agreement").
- ---------

         C. The Borrower, the Administrative Agent, and the Lenders have amended
and restated the Existing Credit Agreement by entering into that certain Amended
and Restated Credit Agreement dated of even date herewith (as amended,
supplemented or otherwise modified from time to time, the "Credit Agreement"),
                                                           ----------------
whereby, pursuant to which, the Lenders have agreed to make certain loans to and
extend certain credit for the account of the Borrower subject to the limitations
set forth in the Credit Agreement. The initial loans under the Credit Agreement
have been used by the Borrower to renew, rearrange, modify and extend all
amounts outstanding under the Existing Credit Agreement.

         D. The Administrative Agent and the Lenders have conditioned their
obligations under the Credit Agreement upon the execution and delivery by
Guarantor of this Amended and Restated Guaranty Agreement, and Guarantor has
agreed to execute and deliver this Amended and Restated Guaranty Agreement.

         NOW, THEREFORE, (i) in order to comply with the terms and conditions of
the Credit Agreement, (ii) to induce the Lenders, at any time or from time to
time, to loan monies and extend credit, with or without security, to or for the
account of Borrower in accordance with the terms of the Credit Agreement, (iii)
at the special insistence and request of the Lenders, and (iv) for other good
and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, Guarantor and the Administrative Agent hereby agree that the
Existing Guaranty Agreement is hereby amended and restated in its entirety to
read as follows:

                                      -1-



                                   ARTICLE 1
                                   ---------
                                  General Terms
                                  -------------

         Section 1.1 Terms Defined Above. As used in this Amended and Restated
                     -------------------
Guaranty Agreement, the terms "Administrative Agent", "Borrower", "Credit
Agreement", "Guarantor" and "Lenders" shall have the meanings indicated above.

         Section 1.2 Certain Definitions. As used in this Amended and Restated
                     -------------------
Guaranty Agreement, the following terms shall have the following meanings,
unless the context otherwise requires (terms defined in the singular shall have
the same meanings when used in the plural and vice versa):
                                              ---- -----

         "Contribution Obligation" shall mean an amount equal, at any time and
          -----------------------
from time to time and for each respective Subsidiary Guarantor, to the product
of (i) its Contribution Percentage times (ii) the sum of all payments made
previous to or at the time of calculation by all Subsidiary Guarantors in
respect of the Liabilities, as a Subsidiary Guarantor (less the amount of any
such payments previously returned to any Subsidiary Guarantor by operation of
law or otherwise, but not including payments received by any Subsidiary
Guarantor by way of its rights of subrogation and contribution under Section 2.9
of any other Guaranty Agreements); provided, however, such Contribution
Obligation for any Subsidiary Guarantor shall in no event exceed such Subsidiary
Guarantor's Maximum Guaranteed Amount, as defined in the respective Guaranty
Agreement of such Subsidiary Guarantor.

         "Contribution Percentage" shall mean for any Subsidiary Guarantor for
          -----------------------
any applicable date as of which such percentage is being determined, an amount
equal to the quotient of (i) the Net Worth of such Subsidiary Guarantor as of
such date, divided by (ii) the sum of the Net Worth of all the Subsidiary
Guarantors as of such date.

         "Guarantor Claims" shall have the meaning indicated in Section 4.1
          ----------------
hereof.

         "Guaranty Agreement" shall mean this Amended and Restated Guaranty
          ------------------
Agreement, and where the context indicates, the "Guaranty Agreement" (as defined
in the Credit Agreement) of any other Subsidiary Guarantor, as the same may from
time to time be amended, modified or supplemented.

         "Liabilities" shall mean (a) any and all Indebtedness, obligations and
          -----------
liabilities of the Borrower pursuant to the Credit Agreement and any other Loan
Document, including without limitation, the unpaid principal of and interest on
the Notes, including without limitation, interest accruing subsequent to the
filing of a petition or other action concerning bankruptcy or other similar
proceeding; (b) any additional loans made by the Lenders to the Borrower; (c)
payment of and performance of any and all present or future obligations of the
Borrower to any Lender or any Affiliate of such Lender under any Swap Agreement
between the Borrower and any Lender or any Affiliate of such Lender; (d) any and
all other indebtedness, obligations and liabilities of any kind of the Borrower
to the Lenders, now or hereafter existing, arising directly between the Borrower
and the Lenders or acquired outright, as a participation, conditionally or as
collateral security from another by the Lenders, absolute or contingent, joint
and/or several, secured or unsecured, due or not due, arising by operation of
law or otherwise, or direct or indirect, including indebtedness, obligations and

                                      -2-



liabilities to the Lenders of the Borrower as a member of any partnership,
syndicate, association or other group, and whether incurred by the Borrower as
principal, surety, endorser, guarantor, accommodation party or otherwise; and
(e) all renewals, rearrangements, increases, extensions for any period,
replacements, amendments or supplements in whole or in part of the Notes or any
documents evidencing the above

         "Maximum Guaranteed Amount" shall mean, for the Guarantor, the greater
          -------------------------
of (i) the "reasonably equivalent value" or "fair consideration" (or equivalent
concept) received by the Guarantor in exchange for the obligation incurred
hereunder, within the meaning of any applicable state or federal fraudulent
conveyance or transfer laws; or (ii) the lesser of (A) the maximum amount that
will not render the Guarantor insolvent, or (B) the maximum amount that will not
leave the Guarantor with any property deemed an unreasonably small capital.
Clauses (A) and (B) are and shall be determined pursuant to and as of the
appropriate date mandated by such applicable state or federal fraudulent
conveyance or transfer laws and to the extent allowed by law take into account
the rights to contribution and subrogation under Section 2.9 in each Guaranty
Agreement so as to provide for the largest Maximum Guaranteed Amount possible.

         "Net Payments" shall mean an amount equal, at any time and from time to
          ------------
time and for each respective Subsidiary Guarantor, to the difference of (i) the
sum of all payments made previous to or at the time of calculation by such
Subsidiary Guarantor in respect of the Liabilities, as a Subsidiary Guarantor,
and in respect of its obligations contained in this Guaranty Agreement, less
(ii) the sum of all such payments previously returned to such Subsidiary
Guarantor by operation of law or otherwise and including payments received by
such Subsidiary Guarantor by way of its rights of subrogation and contribution
under Section 2.9 of any other Guaranty Agreements.

         "Net Worth" shall mean for any Subsidiary Guarantor, determined in
          ---------
accordance with GAAP and calculated on and as of any applicable date on which
such amount is being determined, the difference between (i) the sum of all such
Subsidiary Guarantor's property, at a fair valuation and as of such date, minus
(ii) the sum of all such Subsidiary Guarantor's debts, at a fair valuation and
as of such date, excluding the Liabilities.

         "Subsidiary Guarantors" shall mean the Subsidiaries or other Persons
          ---------------------
party to a Guaranty Agreement, including the Guarantor.

         Section 1.3 Credit Agreement Definitions. Unless otherwise defined
                     ----------------------------
herein, all terms beginning with a capital letter which are defined in the
Credit Agreement shall have the same meanings herein as therein.

                                   ARTICLE 2
                                   ---------
                                  The Guaranty
                                  ------------

         Section 2.1 Liabilities Guaranteed. Guarantor hereby irrevocably and
                     ----------------------
unconditionally guarantees the prompt payment of the Liabilities when due,
whether at maturity or otherwise; provided, however, that, notwithstanding
anything herein or in any other Loan Document to the contrary, the maximum
liability of Guarantor hereunder shall in no event exceed the Maximum Guaranteed
Amount.

                                      -3-



         Section 2.2 Nature of Guaranty. This Guaranty Agreement is an absolute,
                     ------------------
irrevocable, completed and continuing guaranty of payment and not a guaranty of
collection, and no notice of the Liabilities or any extension of credit already
or hereafter contracted by or extended to Borrower need be given to Guarantor.
This Guaranty Agreement may not be revoked by Guarantor and shall continue to be
effective with respect to debt under the Liabilities arising or created after
any attempted revocation by Guarantor and shall remain in full force and effect
until the Liabilities are paid in full and the Commitments are terminated,
notwithstanding that from time to time prior thereto no Liabilities may be
outstanding. Borrower and the Lenders may modify, alter, rearrange, extend for
any period and/or renew from time to time, the Liabilities, and the Lenders may
waive any Default or Events of Default without notice to the Guarantor and in
such event Guarantor will remain fully bound hereunder on the Liabilities. This
Guaranty Agreement shall continue to be effective or be reinstated, as the case
may be, if at any time any payment of the Liabilities is rescinded or must
otherwise be returned by any of the Lenders upon the insolvency, bankruptcy or
reorganization of Borrower or otherwise, all as though such payment had not been
made. This Guaranty Agreement may be enforced by the Administrative Agent and
any subsequent holder of any of the Liabilities and shall not be discharged by
the assignment or negotiation of all or part of the Liabilities. Guarantor
hereby expressly waives presentment, demand, notice of non-payment, protest and
notice of protest and dishonor, notice of Default or Event of Default, notice of
intent to accelerate the maturity and notice of acceleration of the maturity and
any other notice in connection with the Liabilities, and also notice of
acceptance of this Guaranty Agreement, acceptance on the part of the Lenders
being conclusively presumed by the Lenders' request for this Guaranty Agreement
and delivery of the same to the Administrative Agent.

         Section 2.3 Administrative Agent's Rights. Guarantor authorizes the
                     -----------------------------
Administrative Agent, without notice or demand and without affecting Guarantor's
liability hereunder, to obtain a guaranty of the Liabilities from any one or
more Persons and at any time or times to enforce, waive, rearrange, modify,
limit or release any of such other Persons from their obligations under such
guaranties.

         Section 2.4 Guarantor's Waivers.
                     -------------------

                  (a) General. Guarantor waives any right to require any of the
                      -------
Lenders to (i) proceed against Borrower or any other person liable on the
Liabilities, (ii) enforce any of their rights against any other guarantor of the
Liabilities including but not limited to the Subsidiary Guarantors (iii) proceed
or enforce any of their rights against or exhaust any security given to secure
the Liabilities (iv) have Borrower joined with Guarantor in any suit arising out
of this Guaranty Agreement and/or the Liabilities, or (v) pursue any other
remedy in the Lenders' powers whatsoever. The Lenders shall not be required to
mitigate damages or take any action to reduce, collect or enforce the
Liabilities. Guarantor waives any defense arising by reason of any disability,
lack of corporate authority or power, or other defense of Borrower or any other
guarantor of the Liabilities, and shall remain liable hereon regardless of
whether Borrower or any other guarantor be found not liable thereon for any
reason. Whether and when to exercise any of the remedies of the Lenders under
any of the Loan Documents shall be in the sole and absolute discretion of the
Administrative Agent, and no delay by the Administrative Agent in enforcing any
remedy, including delay in conducting a foreclosure sale, shall be a defense to
the Guarantor's liability under this Guaranty Agreement. To the extent allowed

                                      -4-



by applicable law, the Guarantor hereby waives any good faith duty on the part
of the Administrative Agent in exercising any remedies provided in the Loan
Documents.

                  (b) Subrogation. Until the Liabilities have been paid in full,
                      -----------
the Guarantor waives all rights of subrogation or reimbursement against the
Borrower, whether arising by contract or operation of law (including, without
limitation, any such right arising under any federal or state bankruptcy or
insolvency laws) and waives any right to enforce any remedy which the Lenders
now have or may hereafter have against the Borrower, and waives any benefit or
any right to participate in any security now or hereafter held by the
Administrative Agent or any Lender.

         Section 2.5 Maturity of Liabilities; Payment. Guarantor agrees that if
                     --------------------------------
the maturity of any of the Liabilities is accelerated by bankruptcy or
otherwise, such maturity shall also be deemed accelerated for the purpose of
this Guaranty Agreement without demand or notice to Guarantor. Guarantor will,
forthwith upon notice from the Administrative Agent, pay to the Administrative
Agent the amount due and unpaid by Borrower and guaranteed hereby. The failure
of the Administrative Agent to give this notice shall not in any way release
Guarantor hereunder.

         Section 2.6 Administrative Agent's Expenses. If Guarantor fails to pay
                     -------------------------------
the Liabilities after notice from the Administrative Agent of Borrower's failure
to pay any Liabilities when due, and if the Administrative Agent obtains the
services of an attorney for collection of amounts owing by Guarantor hereunder,
or obtaining advice of counsel in respect of any aspect of this Guaranty
Agreement, or if suit is filed to enforce this Guaranty Agreement, or if
proceedings are had in any bankruptcy, probate, receivership or other judicial
proceedings for the establishment or collection of any amount owing by Guarantor
hereunder, or if any amount owing by Guarantor hereunder is collected through
such proceedings, Guarantor agrees to pay to the Administrative Agent the
Administrative Agent's reasonable attorneys' fees.

         Section 2.7 Liability. It is expressly agreed that the liability of the
                     ---------
Guarantor for the payment of the Liabilities guaranteed hereby shall be primary
and not secondary.

         Section 2.8 Events and Circumstances Not Reducing or Discharging
                     ----------------------------------------------------
Guarantor's Obligations. Guarantor hereby consents and agrees to each of the
- -----------------------
following to the fullest extent permitted by law, and agrees that Guarantor's
obligations under this Guaranty Agreement shall not be released, diminished,
impaired, reduced or adversely affected by any of the following, and waives any
rights (including without limitation rights to notice) which Guarantor might
otherwise have as a result of or in connection with any of the following:

                  (a) Modifications, etc. Any renewal, extension, modification,
                      ------------------
increase, decrease, alteration or rearrangement of all or any part of the
Liabilities, or of the Notes, any Loan Document or the Credit Agreement or any
instrument executed in connection therewith, or any contract or understanding
between Borrower and any of the Lenders, or any other Person, pertaining to the
Liabilities.

                                      -5-



                  (b) Adjustment, etc. Any adjustment, indulgence, forbearance
                      ---------------
or compromise that might be granted or given by any of the Lenders to Borrower
or Guarantor or any Person liable on the Liabilities.

                  (c) Condition of Borrower or Guarantor. The insolvency,
                      ----------------------------------
bankruptcy arrangement, adjustment, composition, liquidation, disability,
dissolution, death or lack of power of Borrower or Guarantor or any other Person
at any time liable for the payment of all or part of the Liabilities; or any
dissolution of Borrower or Guarantor, or any sale, lease or transfer of any or
all of the assets of Borrower or Guarantor, or any changes in the shareholders,
partners, or members of Borrower or Guarantor; or any reorganization of Borrower
or Guarantor.

                  (d) Invalidity of Liabilities. The invalidity, illegality or
                      -------------------------
unenforceability of all or any part of the Liabilities, or any document or
agreement executed in connection with the Liabilities, for any reason
whatsoever, including without limitation the fact that the Liabilities, or any
part thereof, exceed the amount permitted by law, the act of creating the
Liabilities or any part thereof is ultra vires, the officers or representatives
                                   ----- -----
executing the documents or otherwise creating the Liabilities acted in excess of
their authority, the Liabilities violate applicable usury laws, the Borrower has
valid defenses, claims or offsets (whether at law, in equity or by agreement)
which render the Liabilities wholly or partially uncollectible from Borrower,
the creation, performance or repayment of the Liabilities (or the execution,
delivery and performance of any document or instrument representing part of the
Liabilities or executed in connection with the Liabilities, or given to secure
the repayment of the Liabilities) is illegal, uncollectible, legally impossible
or unenforceable, or the Credit Agreement or other documents or instruments
pertaining to the Liabilities have been forged or otherwise are irregular or not
genuine or authentic.

                  (e) Release of  Obligors.  Any full or partial  release of the
                      --------------------
liability  of  Borrower  on  the  Liabilities  or  any  part  thereof,   of  any
co-guarantors,  or any other Person now or hereafter liable, whether directly or
indirectly,  jointly,  severally,  or jointly and  severally,  to pay,  perform,
guarantee or assure the payment of the Liabilities or any part thereof, it being
recognized,  acknowledged and agreed by Guarantor that Guarantor may be required
to pay the  Liabilities  in full  without  assistance  or  support  of any other
Person, and Guarantor has not been induced to enter into this Guaranty Agreement
on the basis of a contemplation,  belief,  understanding or agreement that other
parties  other than the Borrower will be liable to perform the  Liabilities,  or
the Lenders will look to other parties to perform the Liabilities.

                  (f) Other Security. The taking or accepting of any other
                      --------------
security, collateral or guaranty, or other assurance of payment, for all or any
part of the Liabilities.

                  (g) Release of Collateral, etc. Any release, surrender,
                      --------------------------
exchange, subordination, deterioration, waste, loss or impairment (including
without limitation negligent, willful, unreasonable or unjustifiable impairment)
of any collateral, property or security, at any time existing in connection
with, or assuring or securing payment of, all or any part of the Liabilities.

                  (h) Care and Diligence. The failure of the Lenders or any
                      ------------------
other Person to exercise diligence or reasonable care in the preservation,
protection, enforcement, sale or other handling or treatment of all or any part

                                      -6-



of such collateral, property or security; provided, however, that Lenders shall
                                          --------  -------
act in a "commercially reasonable" manner as required by applicable provisions
of Article 9 of the Uniform Commercial Code as presently in effect in the State
of Texas when exercising their rights under that certain Pledge and Security
Agreement by and between Borrower and Administrative Agent of even date
herewith.

                  (i) Status of Liens. The fact that any collateral, security,
                      ---------------
security interest or lien contemplated or intended to be given, created or
granted as security for the repayment of the Liabilities shall not be properly
perfected or created, or shall prove to be unenforceable or subordinate to any
other security interest or lien, it being recognized and agreed by Guarantor
that Guarantor is not entering into this Guaranty Agreement in reliance on, or
in contemplation of the benefits of, the validity, enforceability,
collectability or value of any of the collateral for the Liabilities.

                  (j) Payments Rescinded. Any payment by Borrower to the Lenders
                      ------------------
is held to constitute a preference under the bankruptcy laws, or for any reason
the Lenders are required to refund such payment or pay such amount to Borrower
or someone else.

                  (k) Other Actions Taken or Omitted. Any other action taken or
                      ------------------------------
omitted to be taken with respect to the Credit Agreement, the Liabilities, or
the security and collateral therefor, whether or not such action or omission
prejudices Guarantor or increases the likelihood that Guarantor will be required
to pay the Liabilities pursuant to the terms hereof; it being the unambiguous
and unequivocal intention of Guarantor that Guarantor shall be obligated to pay
the Liabilities when due, notwithstanding any occurrence, circumstance, event,
action, or omission whatsoever, whether contemplated or uncontemplated, and
whether or not otherwise or particularly described herein, except for the full
and final payment and satisfaction of the Liabilities.

         Section 2.9 Right of Subrogation and Contribution. If Guarantor makes a
                     -------------------------------------
payment in respect of the Liabilities, it shall be subrogated to the rights of
the Lenders against the Borrower with respect to such payment and shall have the
rights of contribution against the other Subsidiary Guarantors set forth in
Section 2.9 of any other Guaranty Agreements; provided that Guarantor shall not
enforce its rights to any payment by way of subrogation or by exercising its
rights of contribution or reimbursement or the right to participate in any
security now or hereafter held by or for the benefit of the Lenders until all of
the Liabilities have been paid in full. The Guarantor agrees that after all the
Liabilities have been paid in full if its then current Net Payments are less
than the amount of its then current Contribution Obligation, Guarantor shall pay
to any other Subsidiary Guarantors an amount (together with any payments
required of the other Subsidiary Guarantors by Section 2.9 of each other
Guaranty Agreement) such that the Net Payments made by all Subsidiary Guarantors
in respect of the Liabilities shall be shared among all of the Subsidiary
Guarantors in a proportion equal to their respective Contribution Percentage;
provided, however, Guarantor need not make any such payment if at the time such
- --------  -------
payment is to be made Guarantor is illiquid and not making such payment will not
render any other Subsidiary Guarantor insolvent.

                                      -7-



                                   ARTICLE 3
                                   ---------
                         Representations and Warranties
                         ------------------------------

         Section 3.1 By Guarantor. In order to induce the Lenders to accept this
                     ------------
Guaranty Agreement, Guarantor represents and warrants to the Lenders (which
representations and warranties will survive the creation of the Liabilities and
any extension of credit thereunder) that:

                  (a) Benefit to Guarantor. Guarantor's guaranty pursuant to
                      --------------------
this Guaranty Agreement reasonably may be expected to benefit, directly or
indirectly, Guarantor.

                  (b) Existence. Guarantor is a corporation duly organized,
                      ---------
validly existing and in good standing under the laws of the State of Delaware.

                  (c) Power and Authorization. Guarantor is duly authorized and
                      -----------------------
empowered to execute, deliver and perform this Guaranty Agreement and all
necessary action on Guarantor's part requisite for the due execution, delivery
and performance of this Guaranty Agreement has been duly and effectively taken.

                  (d) Binding Obligations. This Guaranty Agreement constitutes
                      -------------------
valid and binding obligations of Guarantor, enforceable in accordance with its
terms, subject to applicable bankruptcy, insolvency, reorganization, moratorium
or other laws affecting creditors' rights generally and subject to general
principals of equity, regardless of whether considered in a proceeding in equity
or at law.

                  (e) Governmental Approvals; No Conflicts. This Guaranty
                      ------------------------------------
Agreement (a) does not require any consent or approval of, registration or
filing with, or any other action by, any Governmental Authority, except such as
have been obtained or made and are in full force and effect, (b) will not
violate any applicable law or regulation or the charter, by-laws or other
organizational documents of the Guarantor or any order of any Governmental
Authority, (c) will not violate or result in a default under any indenture,
agreement or other instrument binding upon the Guarantor or its assets, or give
rise to a right thereunder to require any payment to be made by the Guarantor,
and (d) will not result in the creation or imposition of any Lien on any asset
of the Guarantor.

                  (f) Solvency. The Guarantor hereby represents that (i) it is
                      --------
not insolvent as of the date hereof and will not be rendered insolvent as a
result of this Guaranty Agreement, (ii) it is not engaged in a business or a
transaction, or about to engage in a business or a transaction, for which any
property or assets remaining with such Guarantor thereafter is unreasonably
small capital, and (iii) it does not intend to incur, or believe it will incur,
debts that will be beyond its ability to pay as such debts mature.

         Section 3.2 No Representation by Lenders. Neither the Lenders nor any
                     ----------------------------
other Person has made any representation, warranty or statement to the Guarantor
in order to induce the Guarantor to execute this Guaranty Agreement.

                                      -8-



                                   ARTICLE 4
                                   ---------
                          Subordination of Indebtedness
                          -----------------------------

         Section 4.1 Subordination of All Guarantor Claims. As used herein, the
                     -------------------------------------
term "Guarantor Claims" shall mean all debts and liabilities of Borrower to
Guarantor, whether such debts and liabilities now exist or are hereafter
incurred or arise, or whether the obligation of Borrower thereon be direct,
contingent, primary, secondary, several, joint and several, or otherwise, and
irrespective of whether such debts or liabilities be evidenced by note,
contract, open account, or otherwise, and irrespective of the person or persons
in whose favor such debts or liabilities may, at their inception, have been, or
may hereafter be created, or the manner in which they have been or may hereafter
be acquired by Guarantor. The Guarantor Claims shall include without limitation
all rights and claims of Guarantor against Borrower arising as a result of
subrogation or otherwise as a result of Guarantor's payment of all or a portion
of the Liabilities. During the continuance of any Event of Default, Guarantor
shall not receive or collect, directly or indirectly, from Borrower or any other
party any amount upon the Guarantor Claims.

         Section 4.2 Claims in Bankruptcy. In the event of receivership,
                     --------------------
bankruptcy, reorganization, arrangement, debtor's relief, or other insolvency
proceedings involving Borrower as debtor, the Lenders shall have the right to
prove their claim in any proceeding, so as to establish their rights hereunder
and receive directly from the receiver, trustee or other court custodian,
dividends and payments which would otherwise be payable upon Guarantor Claims.
In such event, Guarantor hereby assigns such dividends and payments to the
Lenders. Should the Administrative Agent or any Lender receive, for application
upon the Liabilities, any such dividend or payment which is otherwise payable to
Guarantor, and which, as between Borrower and Guarantor, shall constitute a
credit upon the Guarantor Claims, then upon payment in full of the Liabilities,
Guarantor shall become subrogated to the rights of the Lenders to the extent
that such payments to the Lenders on the Guarantor Claims have contributed
toward the liquidation of the Liabilities, and such subrogation shall be with
respect to that portion of the Liabilities which would have been unpaid if the
Administrative Agent or a Lender had not received dividends or payments upon the
Guarantor Claims.

         Section 4.3 Payments Held in Trust. In the event that notwithstanding
                     ----------------------
Sections 4.1 and 4.2 above, Guarantor should receive any funds, payments, claims
or distributions which is prohibited by such Sections, Guarantor agrees to hold
in trust for the Lenders an amount equal to the amount of all funds, payments,
claims or distributions so received, and agrees that it shall have absolutely no
dominion over the amount of such funds, payments, claims or distributions except
to pay them promptly to the Administrative Agent, and Guarantor covenants
promptly to pay the same to the Administrative Agent.

         Section 4.4 Liens Subordinate. Guarantor agrees that any liens,
                     -----------------
security interests, judgment liens, charges or other encumbrances upon
Borrower's assets securing payment of the Guarantor Claims shall be and remain
inferior and subordinate to any liens, security interests, judgment liens,
charges or other encumbrances upon Borrower's assets securing payment of the
Liabilities, regardless of whether such encumbrances in favor of Guarantor, the
Administrative Agent or the Lenders presently exist or are hereafter created or
attach. Without the prior written consent of the Lenders, Guarantor shall not
(a) exercise or enforce any creditor's right it may have against the Borrower,

                                      -9-



or (b) foreclose, repossess, sequester or otherwise take steps or institute any
action or proceeding (judicial or otherwise, including without limitation the
commencement of or joinder in any liquidation, bankruptcy, rearrangement,
debtor's relief or insolvency proceeding) to enforce any lien, mortgages, deeds
of trust, security interest, collateral rights, judgments or other encumbrances
on assets of Borrower held by Guarantor.

         Section 4.5 Notation of Records. All promissory notes, or other
                     -------------------
instruments evidencing the Guarantor Claims accepted by or held by Guarantor (if
any) shall contain a specific written notice thereon that the indebtedness
evidenced thereby is subordinated under the terms of this Guaranty Agreement.

                                    ARTICLE 5
                                    ---------
                                  Miscellaneous
                                  -------------

         Section 5.1 Successors and Assigns. This Guaranty Agreement is and
                     ----------------------
shall be in every particular available to the successors and assigns of the
Lenders and is and shall always be fully binding upon the legal representatives,
heirs, successors and assigns of Guarantor, notwithstanding that some or all of
the monies, the repayment of which this Guaranty Agreement applies, may be
actually advanced after any bankruptcy, receivership, reorganization, death,
disability or other event affecting Guarantor.

         Section 5.2 Notices. Any notice or demand to Guarantor under or in
                     -------
connection with this Guaranty Agreement may be given and shall conclusively be
deemed and considered to have been given and received in accordance with Section
12.02 of the Credit Agreement, addressed to Guarantor at the address on the
signature page hereof or at such other address provided to the Administrative
Agent in writing.

         Section 5.3 Business and Financial Information. The Guarantor will
                     ----------------------------------
promptly furnish to the Administrative Agent and the Lenders from time to time
upon request such information regarding the business and affairs and financial
condition of the Guarantor and its subsidiaries as the Administrative Agent and
the Lenders may reasonably request.

         Section 5.4 Choice of Law. This Guaranty Agreement (including, but not
                     -------------
limited to, the validity and enforceability hereof) shall be governed by, and
construed in accordance with, the laws of the State of Texas.

         Section 5.5 Invalidity. In the event that any one or more of the
                     ----------
provisions contained in this Guaranty Agreement shall, for any reason, be held
invalid, illegal or unenforceable in any respect, such invalidity, illegality or
unenforceability shall not affect any other provision of this Guaranty
Agreement.

         SECTION 5.6 ENTIRE AGREEMENT. THIS WRITTEN GUARANTY AGREEMENT EMBODIES
                     ----------------
THE ENTIRE AGREEMENT AND UNDERSTANDING BETWEEN THE LENDERS AND THE GUARANTOR AND
SUPERSEDES ALL OTHER AGREEMENTS AND UNDERSTANDINGS BETWEEN SUCH PARTIES RELATING
TO THE SUBJECT MATTER HEREOF AND THEREOF. THIS WRITTEN GUARANTY AGREEMENT
REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED
BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE

                                      -10-



PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.



                         [SIGNATURES BEGIN ON NEXT PAGE]

                                      -11-





         WITNESS THE EXECUTION HEREOF, effective as of the 7th day of April,
2005.


GUARANTOR:                   ST. MARY ENERGY COMPANY
- ---------


                             By:   /S/ DAVID W. HONEYFIELD
                                   -----------------------
                                   David W. Honeyfield
                                   Vice President - Finance

                             Address: 580 Westlake Park, Suite 600
                                      Houston, Texas 77079

                                          with copy to:

                                      1776 Lincoln Street, Suite 700
                                      Denver, CO  80203


ADMINISTRATIVE AGENT:        WACHOVIA BANK, NATIONAL
- --------------------         ASSOCIATION, as Administrative Agent


                             By:    /S/ PHILIP J. TRINDER
                                    ---------------------
                             Name:  Philip J. Trinder
                             Title: Vice President

                                      -12-

EX-10

                                                                    EXHIBIT 10.3

                     AMENDED AND RESTATED GUARANTY AGREEMENT


                                       by


                           NANCE PETROLEUM CORPORATION


                                   in favor of


                      WACHOVIA BANK, NATIONAL ASSOCIATION,
                             AS ADMINISTRATIVE AGENT



                                  April 7, 2005





                                TABLE OF CONTENTS

                                                                            Page

ARTICLE 1 General Terms........................................................2
  Section 1.1       Terms Defined Above........................................2
  Section 1.2       Certain Definitions........................................2
  Section 1.3       Credit Agreement Definitions...............................3

ARTICLE 2 The Guaranty.........................................................3
  Section 2.1       Liabilities Guaranteed.....................................3
  Section 2.2       Nature of Guaranty.........................................4
  Section 2.3       Administrative Agent's Rights..............................4
  Section 2.4       Guarantor's Waivers........................................4
  Section 2.5       Maturity of Liabilities; Payment...........................5
  Section 2.6       Administrative Agent's Expenses............................5
  Section 2.7       Liability..................................................5
  Section 2.8       Events and Circumstances Not Reducing or Discharging
                    Guarantor's Obligations....................................5
  Section 2.9       Right of Subrogation and Contribution......................7

ARTICLE 3 Representations and Warranties.......................................8
  Section 3.1       By Guarantor...............................................8
  Section 3.2       No Representation by Lenders...............................8

ARTICLE 4 Subordination of Indebtedness........................................9
  Section 4.1       Subordination of All Guarantor Claims......................9
  Section 4.2       Claims in Bankruptcy.......................................9
  Section 4.3       Payments Held in Trust.....................................9
  Section 4.4       Liens Subordinate..........................................9
  Section 4.5       Notation of Records.......................................10

ARTICLE 5 Miscellaneous.......................................................10
  Section 5.1       Successors and Assigns....................................10
  Section 5.2       Notices...................................................10
  Section 5.3       Business and Financial Information........................10
  Section 5.4       Choice of Law.............................................10
  Section 5.5       Invalidity................................................10
  SECTION 5.6       ENTIRE AGREEMENT..........................................10

                                      -i-



                     AMENDED AND RESTATED GUARANTY AGREEMENT
                     ---------------------------------------

         THIS AMENDED AND RESTATED GUARANTY AGREEMENT (this "Guaranty
                                                             --------
Agreement") made by the undersigned guarantor (hereinafter called "Guarantor"),
- ---------                                                          ---------
is in favor of Wachovia Bank, National Association, as Administrative Agent (the
"Administrative Agent") for the lenders (the "Lenders") signatory to the Credit
 --------------------
Agreement defined below.

                                R E C I T A L S:
                                ----------------

         A. Pursuant to that certain Credit Agreement dated as of January 27,
2003, among St. Mary Land & Exploration Company, a Delaware corporation
(hereinafter called the "Borrower"), the Administrative Agent, and the lenders
                         --------
party thereto (the "Existing Lenders") (such Credit Agreement, as amended and
                    ----------------
supplemented, the "Existing Credit Agreement"), the Borrower received certain
                   -------------------------
loans and extensions of credit under a revolving credit facility made available
to the Borrower under the Existing Credit Agreement, up to the aggregate
principal amount of $300,000,000.

         B. The Existing Lenders conditioned their obligations under the
Existing Credit Agreement upon the execution and delivery by Guarantor of that
certain Guaranty Agreement dated as of January 27, 2003 (the "Existing Guaranty
                                                              -----------------
Agreement").
- ---------

         C. The Borrower, the Administrative Agent, and the Lenders have amended
and restated the Existing Credit Agreement by entering into that certain Amended
and Restated Credit Agreement dated of even date herewith (as amended,
supplemented or otherwise modified from time to time, the "Credit Agreement"),
                                                           ----------------
whereby, pursuant to which, the Lenders have agreed to make certain loans to and
extend certain credit for the account of the Borrower subject to the limitations
set forth in the Credit Agreement. The initial loans under the Credit Agreement
have been used by the Borrower to renew, rearrange, modify and extend all
amounts outstanding under the Existing Credit Agreement.

         D. The Administrative Agent and the Lenders have conditioned their
obligations under the Credit Agreement upon the execution and delivery by
Guarantor of this Amended and Restated Guaranty Agreement, and Guarantor has
agreed to execute and deliver this Amended and Restated Guaranty Agreement.

         NOW, THEREFORE, (i) in order to comply with the terms and conditions of
the Credit Agreement, (ii) to induce the Lenders, at any time or from time to
time, to loan monies and extend credit, with or without security, to or for the
account of Borrower in accordance with the terms of the Credit Agreement, (iii)
at the special insistence and request of the Lenders, and (iv) for other good
and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, Guarantor and the Administrative Agent hereby agree that the
Existing Guaranty Agreement is hereby amended and restated in its entirety to
read as follows:

                                      -1-



                                   ARTICLE 1
                                   ---------
                                  General Terms
                                  -------------

         Section 1.1 Terms Defined Above. As used in this Amended and Restated
                     -------------------
Guaranty Agreement, the terms "Administrative Agent", "Borrower", "Credit
Agreement", "Guarantor" and "Lenders" shall have the meanings indicated above.

         Section 1.2 Certain Definitions. As used in this Amended and Restated
                     -------------------
Guaranty Agreement, the following terms shall have the following meanings,
unless the context otherwise requires (terms defined in the singular shall have
the same meanings when used in the plural and vice versa):

         "Contribution Obligation" shall mean an amount equal, at any time and
          -----------------------
from time to time and for each respective Subsidiary Guarantor, to the product
of (i) its Contribution Percentage times (ii) the sum of all payments made
previous to or at the time of calculation by all Subsidiary Guarantors in
respect of the Liabilities, as a Subsidiary Guarantor (less the amount of any
such payments previously returned to any Subsidiary Guarantor by operation of
law or otherwise, but not including payments received by any Subsidiary
Guarantor by way of its rights of subrogation and contribution under Section 2.9
of any other Guaranty Agreements); provided, however, such Contribution
Obligation for any Subsidiary Guarantor shall in no event exceed such Subsidiary
Guarantor's Maximum Guaranteed Amount, as defined in the respective Guaranty
Agreement of such Subsidiary Guarantor.

         "Contribution Percentage" shall mean for any Subsidiary Guarantor for
          -----------------------
any applicable date as of which such percentage is being determined, an amount
equal to the quotient of (i) the Net Worth of such Subsidiary Guarantor as of
such date, divided by (ii) the sum of the Net Worth of all the Subsidiary
Guarantors as of such date.

         "Guarantor Claims" shall have the meaning indicated in Section 4.1
          ----------------
hereof.

         "Guaranty Agreement" shall mean this Amended and Restated Guaranty
          ------------------
Agreement, and where the context indicates, the "Guaranty Agreement" (as defined
in the Credit Agreement) of any other Subsidiary Guarantor, as the same may from
time to time be amended, modified or supplemented.

         "Liabilities" shall mean (a) any and all Indebtedness, obligations and
          -----------
liabilities of the Borrower pursuant to the Credit Agreement and any other Loan
Document, including without limitation, the unpaid principal of and interest on
the Notes, including without limitation, interest accruing subsequent to the
filing of a petition or other action concerning bankruptcy or other similar
proceeding; (b) any additional loans made by the Lenders to the Borrower; (c)
payment of and performance of any and all present or future obligations of the
Borrower to any Lender or any Affiliate of such Lender under any Swap Agreement
between the Borrower and any Lender or any Affiliate of such Lender; (d) any and
all other indebtedness, obligations and liabilities of any kind of the Borrower
to the Lenders, now or hereafter existing, arising directly between the Borrower
and the Lenders or acquired outright, as a participation, conditionally or as
collateral security from another by the Lenders, absolute or contingent, joint
and/or several, secured or unsecured, due or not due, arising by operation of
law or otherwise, or direct or indirect, including indebtedness, obligations and

                                      -2-



liabilities to the Lenders of the Borrower as a member of any partnership,
syndicate, association or other group, and whether incurred by the Borrower as
principal, surety, endorser, guarantor, accommodation party or otherwise; and
(e) all renewals, rearrangements, increases, extensions for any period,
replacements, amendments or supplements in whole or in part of the Notes or any
documents evidencing the above

         "Maximum Guaranteed Amount" shall mean, for the Guarantor, the greater
          -------------------------
of (i) the "reasonably equivalent value" or "fair consideration" (or equivalent
concept) received by the Guarantor in exchange for the obligation incurred
hereunder, within the meaning of any applicable state or federal fraudulent
conveyance or transfer laws; or (ii) the lesser of (A) the maximum amount that
will not render the Guarantor insolvent, or (B) the maximum amount that will not
leave the Guarantor with any property deemed an unreasonably small capital.
Clauses (A) and (B) are and shall be determined pursuant to and as of the
appropriate date mandated by such applicable state or federal fraudulent
conveyance or transfer laws and to the extent allowed by law take into account
the rights to contribution and subrogation under Section 2.9 in each Guaranty
Agreement so as to provide for the largest Maximum Guaranteed Amount possible.

         "Net Payments" shall mean an amount equal, at any time and from time to
          ------------
time and for each respective Subsidiary Guarantor, to the difference of (i) the
sum of all payments made previous to or at the time of calculation by such
Subsidiary Guarantor in respect of the Liabilities, as a Subsidiary Guarantor,
and in respect of its obligations contained in this Guaranty Agreement, less
(ii) the sum of all such payments previously returned to such Subsidiary
Guarantor by operation of law or otherwise and including payments received by
such Subsidiary Guarantor by way of its rights of subrogation and contribution
under Section 2.9 of any other Guaranty Agreements.

         "Net Worth" shall mean for any Subsidiary Guarantor, determined in
          ---------
accordance with GAAP and calculated on and as of any applicable date on which
such amount is being determined, the difference between (i) the sum of all such
Subsidiary Guarantor's property, at a fair valuation and as of such date, minus
(ii) the sum of all such Subsidiary Guarantor's debts, at a fair valuation and
as of such date, excluding the Liabilities.

         "Subsidiary Guarantors" shall mean the Subsidiaries or other Persons
          ---------------------
party to a Guaranty Agreement, including the Guarantor.

         Section 1.3 Credit Agreement Definitions. Unless otherwise defined
                     ----------------------------
herein, all terms beginning with a capital letter which are defined in the
Credit Agreement shall have the same meanings herein as therein.

                                    ARTICLE 2
                                    ---------
                                  The Guaranty
                                  ------------

         Section 2.1 Liabilities Guaranteed. Guarantor hereby irrevocably and
                     ----------------------
unconditionally guarantees the prompt payment of the Liabilities when due,
whether at maturity or otherwise; provided, however, that, notwithstanding
anything herein or in any other Loan Document to the contrary, the maximum
liability of Guarantor hereunder shall in no event exceed the Maximum Guaranteed
Amount.

                                      -3-



         Section 2.2 Nature of Guaranty. This Guaranty Agreement is an absolute,
                     ------------------
irrevocable, completed and continuing guaranty of payment and not a guaranty of
collection, and no notice of the Liabilities or any extension of credit already
or hereafter contracted by or extended to Borrower need be given to Guarantor.
This Guaranty Agreement may not be revoked by Guarantor and shall continue to be
effective with respect to debt under the Liabilities arising or created after
any attempted revocation by Guarantor and shall remain in full force and effect
until the Liabilities are paid in full and the Commitments are terminated,
notwithstanding that from time to time prior thereto no Liabilities may be
outstanding. Borrower and the Lenders may modify, alter, rearrange, extend for
any period and/or renew from time to time, the Liabilities, and the Lenders may
waive any Default or Events of Default without notice to the Guarantor and in
such event Guarantor will remain fully bound hereunder on the Liabilities. This
Guaranty Agreement shall continue to be effective or be reinstated, as the case
may be, if at any time any payment of the Liabilities is rescinded or must
otherwise be returned by any of the Lenders upon the insolvency, bankruptcy or
reorganization of Borrower or otherwise, all as though such payment had not been
made. This Guaranty Agreement may be enforced by the Administrative Agent and
any subsequent holder of any of the Liabilities and shall not be discharged by
the assignment or negotiation of all or part of the Liabilities. Guarantor
hereby expressly waives presentment, demand, notice of non-payment, protest and
notice of protest and dishonor, notice of Default or Event of Default, notice of
intent to accelerate the maturity and notice of acceleration of the maturity and
any other notice in connection with the Liabilities, and also notice of
acceptance of this Guaranty Agreement, acceptance on the part of the Lenders
being conclusively presumed by the Lenders' request for this Guaranty Agreement
and delivery of the same to the Administrative Agent.

         Section 2.3 Administrative Agent's Rights. Guarantor authorizes the
                     -----------------------------
Administrative Agent, without notice or demand and without affecting Guarantor's
liability hereunder, to obtain a guaranty of the Liabilities from any one or
more Persons and at any time or times to enforce, waive, rearrange, modify,
limit or release any of such other Persons from their obligations under such
guaranties.

         Section 2.4 Guarantor's Waivers.
                     -------------------

                  (a) General. Guarantor waives any right to require any of the
                      -------
Lenders to (i) proceed against Borrower or any other person liable on the
Liabilities, (ii) enforce any of their rights against any other guarantor of the
Liabilities including but not limited to the Subsidiary Guarantors (iii) proceed
or enforce any of their rights against or exhaust any security given to secure
the Liabilities (iv) have Borrower joined with Guarantor in any suit arising out
of this Guaranty Agreement and/or the Liabilities, or (v) pursue any other
remedy in the Lenders' powers whatsoever. The Lenders shall not be required to
mitigate damages or take any action to reduce, collect or enforce the
Liabilities. Guarantor waives any defense arising by reason of any disability,
lack of corporate authority or power, or other defense of Borrower or any other
guarantor of the Liabilities, and shall remain liable hereon regardless of
whether Borrower or any other guarantor be found not liable thereon for any
reason. Whether and when to exercise any of the remedies of the Lenders under
any of the Loan Documents shall be in the sole and absolute discretion of the
Administrative Agent, and no delay by the Administrative Agent in enforcing any
remedy, including delay in conducting a foreclosure sale, shall be a defense to
the Guarantor's liability under this Guaranty Agreement. To the extent allowed

                                      -4-



by applicable law, the Guarantor hereby waives any good faith duty on the part
of the Administrative Agent in exercising any remedies provided in the Loan
Documents.

                  (b) Subrogation. Until the Liabilities have been paid in full,
                      -----------
the Guarantor waives all rights of subrogation or reimbursement against the
Borrower, whether arising by contract or operation of law (including, without
limitation, any such right arising under any federal or state bankruptcy or
insolvency laws) and waives any right to enforce any remedy which the Lenders
now have or may hereafter have against the Borrower, and waives any benefit or
any right to participate in any security now or hereafter held by the
Administrative Agent or any Lender.

         Section 2.5 Maturity of Liabilities; Payment. Guarantor agrees that if
                     --------------------------------
the maturity of any of the Liabilities is accelerated by bankruptcy or
otherwise, such maturity shall also be deemed accelerated for the purpose of
this Guaranty Agreement without demand or notice to Guarantor. Guarantor will,
forthwith upon notice from the Administrative Agent, pay to the Administrative
Agent the amount due and unpaid by Borrower and guaranteed hereby. The failure
of the Administrative Agent to give this notice shall not in any way release
Guarantor hereunder.

         Section 2.6 Administrative Agent's Expenses. If Guarantor fails to pay
                     -------------------------------
the Liabilities after notice from the Administrative Agent of Borrower's failure
to pay any Liabilities when due, and if the Administrative Agent obtains the
services of an attorney for collection of amounts owing by Guarantor hereunder,
or obtaining advice of counsel in respect of any aspect of this Guaranty
Agreement, or if suit is filed to enforce this Guaranty Agreement, or if
proceedings are had in any bankruptcy, probate, receivership or other judicial
proceedings for the establishment or collection of any amount owing by Guarantor
hereunder, or if any amount owing by Guarantor hereunder is collected through
such proceedings, Guarantor agrees to pay to the Administrative Agent the
Administrative Agent's reasonable attorneys' fees.

         Section 2.7 Liability. It is expressly agreed that the liability of the
                     ---------
Guarantor for the payment of the Liabilities guaranteed hereby shall be primary
and not secondary.

         Section 2.8 Events and Circumstances Not Reducing or Discharging
                     ----------------------------------------------------
Guarantor's Obligations. Guarantor hereby consents and agrees to each of the
- -----------------------
following to the fullest extent permitted by law, and agrees that Guarantor's
obligations under this Guaranty Agreement shall not be released, diminished,
impaired, reduced or adversely affected by any of the following, and waives any
rights (including without limitation rights to notice) which Guarantor might
otherwise have as a result of or in connection with any of the following:

                  (a) Modifications, etc. Any renewal, extension, modification,
                      ------------------
increase, decrease, alteration or rearrangement of all or any part of the
Liabilities, or of the Notes, any Loan Document or the Credit Agreement or any
instrument executed in connection therewith, or any contract or understanding
between Borrower and any of the Lenders, or any other Person, pertaining to the
Liabilities.

                                      -5-



                  (b) Adjustment, etc. Any adjustment, indulgence, forbearance
                      ---------------
or compromise that might be granted or given by any of the Lenders to Borrower
or Guarantor or any Person liable on the Liabilities.

                  (c) Condition of Borrower or Guarantor. The insolvency,
                      ----------------------------------
bankruptcy arrangement, adjustment, composition, liquidation, disability,
dissolution, death or lack of power of Borrower or Guarantor or any other Person
at any time liable for the payment of all or part of the Liabilities; or any
dissolution of Borrower or Guarantor, or any sale, lease or transfer of any or
all of the assets of Borrower or Guarantor, or any changes in the shareholders,
partners, or members of Borrower or Guarantor; or any reorganization of Borrower
or Guarantor.

                  (d) Invalidity of Liabilities. The invalidity, illegality or
                      -------------------------
unenforceability of all or any part of the Liabilities, or any document or
agreement executed in connection with the Liabilities, for any reason
whatsoever, including without limitation the fact that the Liabilities, or any
part thereof, exceed the amount permitted by law, the act of creating the
Liabilities or any part thereof is ultra vires, the officers or representatives
                                   ----- -----
executing the documents or otherwise creating the Liabilities acted in excess of
their authority, the Liabilities violate applicable usury laws, the Borrower has
valid defenses, claims or offsets (whether at law, in equity or by agreement)
which render the Liabilities wholly or partially uncollectible from Borrower,
the creation, performance or repayment of the Liabilities (or the execution,
delivery and performance of any document or instrument representing part of the
Liabilities or executed in connection with the Liabilities, or given to secure
the repayment of the Liabilities) is illegal, uncollectible, legally impossible
or unenforceable, or the Credit Agreement or other documents or instruments
pertaining to the Liabilities have been forged or otherwise are irregular or not
genuine or authentic.

                  (e) Release of Obligors. Any full or partial release of the
                      -------------------
liability of Borrower on the Liabilities or any part thereof, of any
co-guarantors, or any other Person now or hereafter liable, whether directly or
indirectly, jointly, severally, or jointly and severally, to pay, perform,
guarantee or assure the payment of the Liabilities or any part thereof, it being
recognized, acknowledged and agreed by Guarantor that Guarantor may be required
to pay the Liabilities in full without assistance or support of any other
Person, and Guarantor has not been induced to enter into this Guaranty Agreement
on the basis of a contemplation, belief, understanding or agreement that other
parties other than the Borrower will be liable to perform the Liabilities, or
the Lenders will look to other parties to perform the Liabilities.

                  (f) Other Security. The taking or accepting of any other
                      --------------
security, collateral or guaranty, or other assurance of payment, for all or any
part of the Liabilities.

                  (g) Release of Collateral, etc. Any release, surrender,
                      --------------------------
exchange, subordination, deterioration, waste, loss or impairment (including
without limitation negligent, willful, unreasonable or unjustifiable impairment)
of any collateral, property or security, at any time existing in connection
with, or assuring or securing payment of, all or any part of the Liabilities.

                  (h) Care and Diligence. The failure of the Lenders or any
                      ------------------
other Person to exercise diligence or reasonable care in the preservation,
protection, enforcement, sale or other handling or treatment of all or any part

                                      -6-



of such collateral, property or security; provided, however, that Lenders shall
                                          --------  -------
act in a "commercially reasonable" manner as required by applicable provisions
of Article 9 of the Uniform Commercial Code as presently in effect in the State
of Texas when exercising their rights under that certain Pledge and Security
Agreement by and between Borrower and Administrative Agent of even date
herewith.

                  (i) Status of Liens. The fact that any collateral, security,
                      ---------------
security interest or lien contemplated or intended to be given, created or
granted as security for the repayment of the Liabilities shall not be properly
perfected or created, or shall prove to be unenforceable or subordinate to any
other security interest or lien, it being recognized and agreed by Guarantor
that Guarantor is not entering into this Guaranty Agreement in reliance on, or
in contemplation of the benefits of, the validity, enforceability,
collectability or value of any of the collateral for the Liabilities.

                  (j) Payments Rescinded. Any payment by Borrower to the Lenders
                      ------------------
is held to constitute a preference under the bankruptcy laws, or for any reason
the Lenders are required to refund such payment or pay such amount to Borrower
or someone else.

                  (k) Other Actions Taken or Omitted. Any other action taken or
                      ------------------------------
omitted to be taken with respect to the Credit Agreement, the Liabilities, or
the security and collateral therefor, whether or not such action or omission
prejudices Guarantor or increases the likelihood that Guarantor will be required
to pay the Liabilities pursuant to the terms hereof; it being the unambiguous
and unequivocal intention of Guarantor that Guarantor shall be obligated to pay
the Liabilities when due, notwithstanding any occurrence, circumstance, event,
action, or omission whatsoever, whether contemplated or uncontemplated, and
whether or not otherwise or particularly described herein, except for the full
and final payment and satisfaction of the Liabilities.

         Section 2.9 Right of Subrogation and Contribution. If Guarantor makes a
                     -------------------------------------
payment in respect of the Liabilities, it shall be subrogated to the rights of
the Lenders against the Borrower with respect to such payment and shall have the
rights of contribution against the other Subsidiary Guarantors set forth in
Section 2.9 of any other Guaranty Agreements; provided that Guarantor shall not
enforce its rights to any payment by way of subrogation or by exercising its
rights of contribution or reimbursement or the right to participate in any
security now or hereafter held by or for the benefit of the Lenders until all of
the Liabilities have been paid in full. The Guarantor agrees that after all the
Liabilities have been paid in full if its then current Net Payments are less
than the amount of its then current Contribution Obligation, Guarantor shall pay
to any other Subsidiary Guarantors an amount (together with any payments
required of the other Subsidiary Guarantors by Section 2.9 of each other
Guaranty Agreement) such that the Net Payments made by all Subsidiary Guarantors
in respect of the Liabilities shall be shared among all of the Subsidiary
Guarantors in a proportion equal to their respective Contribution Percentage;
provided, however, Guarantor need not make any such payment if at the time such
- --------  -------
payment is to be made Guarantor is illiquid and not making such payment will not
render any other Subsidiary Guarantor insolvent.

                                      -7-



                                   ARTICLE 3
                                   ---------
                         Representations and Warranties
                         ------------------------------

         Section 3.1 By Guarantor. In order to induce the Lenders to accept this
                     ------------
Guaranty Agreement, Guarantor represents and warrants to the Lenders (which
representations and warranties will survive the creation of the Liabilities and
any extension of credit thereunder) that:

                  (a) Benefit to Guarantor. Guarantor's guaranty pursuant to
                      --------------------
this Guaranty Agreement reasonably may be expected to benefit, directly or
indirectly, Guarantor.

                  (b) Existence. Guarantor is a corporation duly organized,
                      ---------
validly existing and in good standing under the laws of the State of Montana.

                  (c) Power and Authorization. Guarantor is duly authorized and
                      -----------------------
empowered to execute, deliver and perform this Guaranty Agreement and all
necessary action on Guarantor's part requisite for the due execution, delivery
and performance of this Guaranty Agreement has been duly and effectively taken.

                  (d) Binding Obligations. This Guaranty Agreement constitutes
                      -------------------
valid and binding obligations of Guarantor, enforceable in accordance with its
terms, subject to applicable bankruptcy, insolvency, reorganization, moratorium
or other laws affecting creditors' rights generally and subject to general
principals of equity, regardless of whether considered in a proceeding in equity
or at law.

                  (e) Governmental Approvals; No Conflicts. This Guaranty
                      ------------------------------------
Agreement (a) does not require any consent or approval of, registration or
filing with, or any other action by, any Governmental Authority, except such as
have been obtained or made and are in full force and effect, (b) will not
violate any applicable law or regulation or the charter, by-laws or other
organizational documents of the Guarantor or any order of any Governmental
Authority, (c) will not violate or result in a default under any indenture,
agreement or other instrument binding upon the Guarantor or its assets, or give
rise to a right thereunder to require any payment to be made by the Guarantor,
and (d) will not result in the creation or imposition of any Lien on any asset
of the Guarantor.

                  (f) Solvency. The Guarantor hereby represents that (i) it is
                      --------
not insolvent as of the date hereof and will not be rendered insolvent as a
result of this Guaranty Agreement, (ii) it is not engaged in a business or a
transaction, or about to engage in a business or a transaction, for which any
property or assets remaining with such Guarantor thereafter is unreasonably
small capital, and (iii) it does not intend to incur, or believe it will incur,
debts that will be beyond its ability to pay as such debts mature.

         Section 3.2 No Representation by Lenders. Neither the Lenders nor any
                     ----------------------------
other Person has made any representation, warranty or statement to the Guarantor
in order to induce the Guarantor to execute this Guaranty Agreement.

                                      -8-



                                    ARTICLE 4
                                    ---------
                          Subordination of Indebtedness
                          -----------------------------

         Section 4.1 Subordination of All Guarantor Claims. As used herein, the
                     -------------------------------------
term "Guarantor Claims" shall mean all debts and liabilities of Borrower to
Guarantor, whether such debts and liabilities now exist or are hereafter
incurred or arise, or whether the obligation of Borrower thereon be direct,
contingent, primary, secondary, several, joint and several, or otherwise, and
irrespective of whether such debts or liabilities be evidenced by note,
contract, open account, or otherwise, and irrespective of the person or persons
in whose favor such debts or liabilities may, at their inception, have been, or
may hereafter be created, or the manner in which they have been or may hereafter
be acquired by Guarantor. The Guarantor Claims shall include without limitation
all rights and claims of Guarantor against Borrower arising as a result of
subrogation or otherwise as a result of Guarantor's payment of all or a portion
of the Liabilities. During the continuance of any Event of Default, Guarantor
shall not receive or collect, directly or indirectly, from Borrower or any other
party any amount upon the Guarantor Claims.

         Section 4.2 Claims in Bankruptcy. In the event of receivership,
                     --------------------
bankruptcy, reorganization, arrangement, debtor's relief, or other insolvency
proceedings involving Borrower as debtor, the Lenders shall have the right to
prove their claim in any proceeding, so as to establish their rights hereunder
and receive directly from the receiver, trustee or other court custodian,
dividends and payments which would otherwise be payable upon Guarantor Claims.
In such event, Guarantor hereby assigns such dividends and payments to the
Lenders. Should the Administrative Agent or any Lender receive, for application
upon the Liabilities, any such dividend or payment which is otherwise payable to
Guarantor, and which, as between Borrower and Guarantor, shall constitute a
credit upon the Guarantor Claims, then upon payment in full of the Liabilities,
Guarantor shall become subrogated to the rights of the Lenders to the extent
that such payments to the Lenders on the Guarantor Claims have contributed
toward the liquidation of the Liabilities, and such subrogation shall be with
respect to that portion of the Liabilities which would have been unpaid if the
Administrative Agent or a Lender had not received dividends or payments upon the
Guarantor Claims.

         Section 4.3 Payments Held in Trust. In the event that notwithstanding
                     ----------------------
Sections 4.1 and 4.2 above, Guarantor should receive any funds, payments, claims
or distributions which is prohibited by such Sections, Guarantor agrees to hold
in trust for the Lenders an amount equal to the amount of all funds, payments,
claims or distributions so received, and agrees that it shall have absolutely no
dominion over the amount of such funds, payments, claims or distributions except
to pay them promptly to the Administrative Agent, and Guarantor covenants
promptly to pay the same to the Administrative Agent.

         Section 4.4 Liens Subordinate. Guarantor agrees that any liens,
                     -----------------
security interests, judgment liens, charges or other encumbrances upon
Borrower's assets securing payment of the Guarantor Claims shall be and remain
inferior and subordinate to any liens, security interests, judgment liens,
charges or other encumbrances upon Borrower's assets securing payment of the
Liabilities, regardless of whether such encumbrances in favor of Guarantor, the
Administrative Agent or the Lenders presently exist or are hereafter created or
attach. Without the prior written consent of the Lenders, Guarantor shall not
(a) exercise or enforce any creditor's right it may have against the Borrower,

                                      -9-



or (b) foreclose, repossess, sequester or otherwise take steps or institute any
action or proceeding (judicial or otherwise, including without limitation the
commencement of or joinder in any liquidation, bankruptcy, rearrangement,
debtor's relief or insolvency proceeding) to enforce any lien, mortgages, deeds
of trust, security interest, collateral rights, judgments or other encumbrances
on assets of Borrower held by Guarantor.

         Section 4.5 Notation of Records. All promissory notes, or other
                     -------------------
instruments evidencing the Guarantor Claims accepted by or held by Guarantor (if
any) shall contain a specific written notice thereon that the indebtedness
evidenced thereby is subordinated under the terms of this Guaranty Agreement.

                                    ARTICLE 5
                                    ---------
                                  Miscellaneous
                                  -------------

         Section 5.1 Successors and Assigns. This Guaranty Agreement is and
                     ----------------------
shall be in every particular available to the successors and assigns of the
Lenders and is and shall always be fully binding upon the legal representatives,
heirs, successors and assigns of Guarantor, notwithstanding that some or all of
the monies, the repayment of which this Guaranty Agreement applies, may be
actually advanced after any bankruptcy, receivership, reorganization, death,
disability or other event affecting Guarantor.

         Section 5.2 Notices. Any notice or demand to Guarantor under or in
                     -------
connection with this Guaranty Agreement may be given and shall conclusively be
deemed and considered to have been given and received in accordance with Section
12.02 of the Credit Agreement, addressed to Guarantor at the address on the
signature page hereof or at such other address provided to the Administrative
Agent in writing.

         Section 5.3 Business and Financial Information. The Guarantor will
                     ----------------------------------
promptly furnish to the Administrative Agent and the Lenders from time to time
upon request such information regarding the business and affairs and financial
condition of the Guarantor and its subsidiaries as the Administrative Agent and
the Lenders may reasonably request.

         Section 5.4 Choice of Law. This Guaranty Agreement (including, but not
                     -------------
limited to, the validity and enforceability hereof) shall be governed by, and
construed in accordance with, the laws of the State of Texas.

         Section 5.5 Invalidity. In the event that any one or more of the
                     ----------
provisions contained in this Guaranty Agreement shall, for any reason, be held
invalid, illegal or unenforceable in any respect, such invalidity, illegality or
unenforceability shall not affect any other provision of this Guaranty
Agreement.

         SECTION 5.6 ENTIRE AGREEMENT. THIS WRITTEN GUARANTY AGREEMENT EMBODIES
                     ----------------
THE ENTIRE AGREEMENT AND UNDERSTANDING BETWEEN THE LENDERS AND THE GUARANTOR AND
SUPERSEDES ALL OTHER AGREEMENTS AND UNDERSTANDINGS BETWEEN SUCH PARTIES RELATING
TO THE SUBJECT MATTER HEREOF AND THEREOF. THIS WRITTEN GUARANTY AGREEMENT
REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED
BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE

                                      -10-



PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.



                         [SIGNATURES BEGIN ON NEXT PAGE]

                                      -11-





         WITNESS THE EXECUTION HEREOF, effective as of the 7th day of April,
2005.


GUARANTOR:                   NANCE PETROLEUM CORPORATION
- ---------


                             By:   /S/ DAVID W. HONEYFIELD
                                   -----------------------
                                   David W. Honeyfield
                                   Vice President - Finance

                             Address: 550 N. 31st Street, Suite 500
                                      Billings, MT  59103

                                          with copy to:

                                      1776 Lincoln Street, Suite 700
                                      Denver, CO  80203


ADMINISTRATIVE AGENT:        WACHOVIA BANK, NATIONAL
- --------------------         ASSOCIATION, as Administrative Agent


                             By:    /S/ PHILIP J. TRINDER
                                    ---------------------
                             Name:  Philip J. Trinder
                             Title: Vice President

                                      -12-

EX-10

                                                                    EXHIBIT 10.4

                     AMENDED AND RESTATED GUARANTY AGREEMENT


                                       by


                                    NPC INC.


                                   in favor of


                      WACHOVIA BANK, NATIONAL ASSOCIATION,
                             AS ADMINISTRATIVE AGENT



                                  April 7, 2005





                                TABLE OF CONTENTS
                                -----------------

                                                                            Page

ARTICLE 1 General Terms........................................................2
  Section 1.1       Terms Defined Above........................................2
  Section 1.2       Certain Definitions........................................2
  Section 1.3       Credit Agreement Definitions...............................3

ARTICLE 2 The Guaranty.........................................................3
  Section 2.1       Liabilities Guaranteed.....................................3
  Section 2.2       Nature of Guaranty.........................................4
  Section 2.3       Administrative Agent's Rights..............................4
  Section 2.4       Guarantor's Waivers........................................4
  Section 2.5       Maturity of Liabilities; Payment...........................5
  Section 2.6       Administrative Agent's Expenses............................5
  Section 2.7       Liability..................................................5
  Section 2.8       Events and Circumstances Not Reducing or Discharging
                    Guarantor's Obligations....................................5
  Section 2.9       Right of Subrogation and Contribution......................7

ARTICLE 3 Representations and Warranties.......................................8
  Section 3.1       By Guarantor...............................................8
  Section 3.2       No Representation by Lenders...............................8

ARTICLE 4 Subordination of Indebtedness........................................9
  Section 4.1       Subordination of All Guarantor Claims......................9
  Section 4.2       Claims in Bankruptcy.......................................9
  Section 4.3       Payments Held in Trust.....................................9
  Section 4.4       Liens Subordinate..........................................9
  Section 4.5       Notation of Records.......................................10

ARTICLE 5 Miscellaneous.......................................................10
  Section 5.1       Successors and Assigns....................................10
  Section 5.2       Notices...................................................10
  Section 5.3       Business and Financial Information........................10
  Section 5.4       Choice of Law.............................................10
  Section 5.5       Invalidity................................................10
  SECTION 5.6       ENTIRE AGREEMENT..........................................10

                                      -i-



                     AMENDED AND RESTATED GUARANTY AGREEMENT
                     ---------------------------------------

         THIS AMENDED AND RESTATED GUARANTY AGREEMENT (this "Guaranty
                                                             --------
Agreement") made by the undersigned guarantor (hereinafter called "Guarantor"),
- ---------                                                          ---------
is in favor of Wachovia Bank, National Association, as Administrative Agent (the
"Administrative Agent") for the lenders (the "Lenders") signatory to the Credit
 --------------------                         -------
Agreement defined below.

                                R E C I T A L S:
                                ----------------

         A. Pursuant to that certain Credit Agreement dated as of January 27,
2003, among St. Mary Land & Exploration Company, a Delaware corporation
(hereinafter called the "Borrower"), the Administrative Agent, and the lenders
                         --------
party thereto (the "Existing Lenders") (such Credit Agreement, as amended and
                    ----------------
supplemented, the "Existing Credit Agreement"), the Borrower received certain
                   -------------------------
loans and extensions of credit under a revolving credit facility made available
to the Borrower under the Existing Credit Agreement, up to the aggregate
principal amount of $300,000,000.

         B. The Existing Lenders conditioned their obligations under the
Existing Credit Agreement upon the execution and delivery by Guarantor of that
certain Guaranty Agreement dated as of January 27, 2003 (the "Existing Guaranty
                                                              -----------------
Agreement").
- ---------

         C. The Borrower, the Administrative Agent, and the Lenders have amended
and restated the Existing Credit Agreement by entering into that certain Amended
and Restated Credit Agreement dated of even date herewith (as amended,
supplemented or otherwise modified from time to time, the "Credit Agreement"),
                                                           ----------------
whereby, pursuant to which, the Lenders have agreed to make certain loans to and
extend certain credit for the account of the Borrower subject to the limitations
set forth in the Credit Agreement. The initial loans under the Credit Agreement
have been used by the Borrower to renew, rearrange, modify and extend all
amounts outstanding under the Existing Credit Agreement.

         D. The Administrative Agent and the Lenders have conditioned their
obligations under the Credit Agreement upon the execution and delivery by
Guarantor of this Amended and Restated Guaranty Agreement, and Guarantor has
agreed to execute and deliver this Amended and Restated Guaranty Agreement.

         NOW, THEREFORE, (i) in order to comply with the terms and conditions of
the Credit Agreement, (ii) to induce the Lenders, at any time or from time to
time, to loan monies and extend credit, with or without security, to or for the
account of Borrower in accordance with the terms of the Credit Agreement, (iii)
at the special insistence and request of the Lenders, and (iv) for other good
and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, Guarantor and the Administrative Agent hereby agree that the
Existing Guaranty Agreement is hereby amended and restated in its entirety to
read as follows:

                                      -1-



                                   ARTICLE 1
                                   ---------
                                  General Terms
                                  -------------

         Section 1.1 Terms Defined Above. As used in this Amended and Restated
                     -------------------
Guaranty Agreement, the terms "Administrative Agent", "Borrower", "Credit
Agreement", "Guarantor" and "Lenders" shall have the meanings indicated above.

         Section 1.2 Certain Definitions. As used in this Amended and Restated
                     -------------------
Guaranty Agreement, the following terms shall have the following meanings,
unless the context otherwise requires (terms defined in the singular shall have
the same meanings when used in the plural and vice versa):
                                              ---- -----

         "Contribution Obligation" shall mean an amount equal, at any time and
          -----------------------
from time to time and for each respective Subsidiary Guarantor, to the product
of (i) its Contribution Percentage times (ii) the sum of all payments made
previous to or at the time of calculation by all Subsidiary Guarantors in
respect of the Liabilities, as a Subsidiary Guarantor (less the amount of any
such payments previously returned to any Subsidiary Guarantor by operation of
law or otherwise, but not including payments received by any Subsidiary
Guarantor by way of its rights of subrogation and contribution under Section 2.9
of any other Guaranty Agreements); provided, however, such Contribution
Obligation for any Subsidiary Guarantor shall in no event exceed such Subsidiary
Guarantor's Maximum Guaranteed Amount, as defined in the respective Guaranty
Agreement of such Subsidiary Guarantor.

         "Contribution Percentage" shall mean for any Subsidiary Guarantor for
          -----------------------
any applicable date as of which such percentage is being determined, an amount
equal to the quotient of (i) the Net Worth of such Subsidiary Guarantor as of
such date, divided by (ii) the sum of the Net Worth of all the Subsidiary
Guarantors as of such date.

         "Guarantor Claims" shall have the meaning indicated in Section 4.1
          ----------------
hereof.

         "Guaranty Agreement" shall mean this Amended and Restated Guaranty
          ------------------
Agreement, and where the context indicates, the "Guaranty Agreement" (as defined
in the Credit Agreement) of any other Subsidiary Guarantor, as the same may from
time to time be amended, modified or supplemented.

         "Liabilities" shall mean (a) any and all Indebtedness, obligations and
          -----------
liabilities of the Borrower pursuant to the Credit Agreement and any other Loan
Document, including without limitation, the unpaid principal of and interest on
the Notes, including without limitation, interest accruing subsequent to the
filing of a petition or other action concerning bankruptcy or other similar
proceeding; (b) any additional loans made by the Lenders to the Borrower; (c)
payment of and performance of any and all present or future obligations of the
Borrower to any Lender or any Affiliate of such Lender under any Swap Agreement
between the Borrower and any Lender or any Affiliate of such Lender; (d) any and
all other indebtedness, obligations and liabilities of any kind of the Borrower
to the Lenders, now or hereafter existing, arising directly between the Borrower
and the Lenders or acquired outright, as a participation, conditionally or as
collateral security from another by the Lenders, absolute or contingent, joint
and/or several, secured or unsecured, due or not due, arising by operation of
law or otherwise, or direct or indirect, including indebtedness, obligations and

                                      -2-



liabilities to the Lenders of the Borrower as a member of any partnership,
syndicate, association or other group, and whether incurred by the Borrower as
principal, surety, endorser, guarantor, accommodation party or otherwise; and
(e) all renewals, rearrangements, increases, extensions for any period,
replacements, amendments or supplements in whole or in part of the Notes or any
documents evidencing the above

         "Maximum Guaranteed Amount" shall mean, for the Guarantor, the greater
          -------------------------
of (i) the "reasonably equivalent value" or "fair consideration" (or equivalent
concept) received by the Guarantor in exchange for the obligation incurred
hereunder, within the meaning of any applicable state or federal fraudulent
conveyance or transfer laws; or (ii) the lesser of (A) the maximum amount that
will not render the Guarantor insolvent, or (B) the maximum amount that will not
leave the Guarantor with any property deemed an unreasonably small capital.
Clauses (A) and (B) are and shall be determined pursuant to and as of the
appropriate date mandated by such applicable state or federal fraudulent
conveyance or transfer laws and to the extent allowed by law take into account
the rights to contribution and subrogation under Section 2.9 in each Guaranty
Agreement so as to provide for the largest Maximum Guaranteed Amount possible.

         "Net Payments" shall mean an amount equal, at any time and from time to
          ------------
time and for each respective Subsidiary Guarantor, to the difference of (i) the
sum of all payments made previous to or at the time of calculation by such
Subsidiary Guarantor in respect of the Liabilities, as a Subsidiary Guarantor,
and in respect of its obligations contained in this Guaranty Agreement, less
(ii) the sum of all such payments previously returned to such Subsidiary
Guarantor by operation of law or otherwise and including payments received by
such Subsidiary Guarantor by way of its rights of subrogation and contribution
under Section 2.9 of any other Guaranty Agreements.

         "Net Worth" shall mean for any Subsidiary Guarantor, determined in
          ---------
accordance with GAAP and calculated on and as of any applicable date on which
such amount is being determined, the difference between (i) the sum of all such
Subsidiary Guarantor's property, at a fair valuation and as of such date, minus
(ii) the sum of all such Subsidiary Guarantor's debts, at a fair valuation and
as of such date, excluding the Liabilities.

         "Subsidiary Guarantors" shall mean the Subsidiaries or other Persons
          ---------------------
party to a Guaranty Agreement, including the Guarantor.

         Section 1.3 Credit Agreement Definitions. Unless otherwise defined
                     ----------------------------
herein, all terms beginning with a capital letter which are defined in the
Credit Agreement shall have the same meanings herein as therein.

                                   ARTICLE 2
                                   ---------
                                  The Guaranty
                                  ------------

         Section 2.1 Liabilities Guaranteed. Guarantor hereby irrevocably and
                     ----------------------
unconditionally guarantees the prompt payment of the Liabilities when due,
whether at maturity or otherwise; provided, however, that, notwithstanding
anything herein or in any other Loan Document to the contrary, the maximum
liability of Guarantor hereunder shall in no event exceed the Maximum Guaranteed
Amount.

                                      -3-



         Section 2.2 Nature of Guaranty. This Guaranty Agreement is an absolute,
                     ------------------
irrevocable, completed and continuing guaranty of payment and not a guaranty of
collection, and no notice of the Liabilities or any extension of credit already
or hereafter contracted by or extended to Borrower need be given to Guarantor.
This Guaranty Agreement may not be revoked by Guarantor and shall continue to be
effective with respect to debt under the Liabilities arising or created after
any attempted revocation by Guarantor and shall remain in full force and effect
until the Liabilities are paid in full and the Commitments are terminated,
notwithstanding that from time to time prior thereto no Liabilities may be
outstanding. Borrower and the Lenders may modify, alter, rearrange, extend for
any period and/or renew from time to time, the Liabilities, and the Lenders may
waive any Default or Events of Default without notice to the Guarantor and in
such event Guarantor will remain fully bound hereunder on the Liabilities. This
Guaranty Agreement shall continue to be effective or be reinstated, as the case
may be, if at any time any payment of the Liabilities is rescinded or must
otherwise be returned by any of the Lenders upon the insolvency, bankruptcy or
reorganization of Borrower or otherwise, all as though such payment had not been
made. This Guaranty Agreement may be enforced by the Administrative Agent and
any subsequent holder of any of the Liabilities and shall not be discharged by
the assignment or negotiation of all or part of the Liabilities. Guarantor
hereby expressly waives presentment, demand, notice of non-payment, protest and
notice of protest and dishonor, notice of Default or Event of Default, notice of
intent to accelerate the maturity and notice of acceleration of the maturity and
any other notice in connection with the Liabilities, and also notice of
acceptance of this Guaranty Agreement, acceptance on the part of the Lenders
being conclusively presumed by the Lenders' request for this Guaranty Agreement
and delivery of the same to the Administrative Agent.

         Section 2.3 Administrative Agent's Rights. Guarantor authorizes the
                     -----------------------------
Administrative Agent, without notice or demand and without affecting Guarantor's
liability hereunder, to obtain a guaranty of the Liabilities from any one or
more Persons and at any time or times to enforce, waive, rearrange, modify,
limit or release any of such other Persons from their obligations under such
guaranties.

         Section 2.4 Guarantor's Waivers.
                     -------------------

                  (a) General. Guarantor waives any right to require any of the
                      -------
Lenders to (i) proceed against Borrower or any other person liable on the
Liabilities, (ii) enforce any of their rights against any other guarantor of the
Liabilities including but not limited to the Subsidiary Guarantors (iii) proceed
or enforce any of their rights against or exhaust any security given to secure
the Liabilities (iv) have Borrower joined with Guarantor in any suit arising out
of this Guaranty Agreement and/or the Liabilities, or (v) pursue any other
remedy in the Lenders' powers whatsoever. The Lenders shall not be required to
mitigate damages or take any action to reduce, collect or enforce the
Liabilities. Guarantor waives any defense arising by reason of any disability,
lack of corporate authority or power, or other defense of Borrower or any other
guarantor of the Liabilities, and shall remain liable hereon regardless of
whether Borrower or any other guarantor be found not liable thereon for any
reason. Whether and when to exercise any of the remedies of the Lenders under
any of the Loan Documents shall be in the sole and absolute discretion of the
Administrative Agent, and no delay by the Administrative Agent in enforcing any
remedy, including delay in conducting a foreclosure sale, shall be a defense to
the Guarantor's liability under this Guaranty Agreement. To the extent allowed

                                      -4-



by applicable law, the Guarantor hereby waives any good faith duty on the part
of the Administrative Agent in exercising any remedies provided in the Loan
Documents.

                  (b) Subrogation. Until the Liabilities have been paid in full,
                      -----------
the Guarantor waives all rights of subrogation or reimbursement against the
Borrower, whether arising by contract or operation of law (including, without
limitation, any such right arising under any federal or state bankruptcy or
insolvency laws) and waives any right to enforce any remedy which the Lenders
now have or may hereafter have against the Borrower, and waives any benefit or
any right to participate in any security now or hereafter held by the
Administrative Agent or any Lender.

         Section 2.5 Maturity of Liabilities; Payment. Guarantor agrees that if
                     --------------------------------
the maturity of any of the Liabilities is accelerated by bankruptcy or
otherwise, such maturity shall also be deemed accelerated for the purpose of
this Guaranty Agreement without demand or notice to Guarantor. Guarantor will,
forthwith upon notice from the Administrative Agent, pay to the Administrative
Agent the amount due and unpaid by Borrower and guaranteed hereby. The failure
of the Administrative Agent to give this notice shall not in any way release
Guarantor hereunder.

         Section 2.6 Administrative Agent's Expenses. If Guarantor fails to pay
                     -------------------------------
the Liabilities after notice from the Administrative Agent of Borrower's failure
to pay any Liabilities when due, and if the Administrative Agent obtains the
services of an attorney for collection of amounts owing by Guarantor hereunder,
or obtaining advice of counsel in respect of any aspect of this Guaranty
Agreement, or if suit is filed to enforce this Guaranty Agreement, or if
proceedings are had in any bankruptcy, probate, receivership or other judicial
proceedings for the establishment or collection of any amount owing by Guarantor
hereunder, or if any amount owing by Guarantor hereunder is collected through
such proceedings, Guarantor agrees to pay to the Administrative Agent the
Administrative Agent's reasonable attorneys' fees.

         Section 2.7 Liability. It is expressly agreed that the liability of the
                     ---------
Guarantor for the payment of the Liabilities guaranteed hereby shall be primary
and not secondary.

         Section 2.8 Events and Circumstances Not Reducing or Discharging
                     ----------------------------------------------------
Guarantor's Obligations. Guarantor hereby consents and agrees to each of the
- -----------------------
following to the fullest extent permitted by law, and agrees that Guarantor's
obligations under this Guaranty Agreement shall not be released, diminished,
impaired, reduced or adversely affected by any of the following, and waives any
rights (including without limitation rights to notice) which Guarantor might
otherwise have as a result of or in connection with any of the following:

                  (a) Modifications, etc. Any renewal, extension, modification,
                      ------------------
increase, decrease, alteration or rearrangement of all or any part of the
Liabilities, or of the Notes, any Loan Document or the Credit Agreement or any
instrument executed in connection therewith, or any contract or understanding
between Borrower and any of the Lenders, or any other Person, pertaining to the
Liabilities.

                                      -5-



                  (b) Adjustment, etc. Any adjustment, indulgence, forbearance
                      ---------------
or compromise that might be granted or given by any of the Lenders to Borrower
or Guarantor or any Person liable on the Liabilities.

                  (c) Condition of Borrower or Guarantor. The insolvency,
                      ----------------------------------
bankruptcy arrangement, adjustment, composition, liquidation, disability,
dissolution, death or lack of power of Borrower or Guarantor or any other Person
at any time liable for the payment of all or part of the Liabilities; or any
dissolution of Borrower or Guarantor, or any sale, lease or transfer of any or
all of the assets of Borrower or Guarantor, or any changes in the shareholders,
partners, or members of Borrower or Guarantor; or any reorganization of Borrower
or Guarantor.

                  (d) Invalidity of Liabilities. The invalidity, illegality or
                      -------------------------
unenforceability of all or any part of the Liabilities, or any document or
agreement executed in connection with the Liabilities, for any reason
whatsoever, including without limitation the fact that the Liabilities, or any
part thereof, exceed the amount permitted by law, the act of creating the
Liabilities or any part thereof is ultra vires, the officers or representatives
                                   ----- -----
executing the documents or otherwise creating the Liabilities acted in excess of
their authority, the Liabilities violate applicable usury laws, the Borrower has
valid defenses, claims or offsets (whether at law, in equity or by agreement)
which render the Liabilities wholly or partially uncollectible from Borrower,
the creation, performance or repayment of the Liabilities (or the execution,
delivery and performance of any document or instrument representing part of the
Liabilities or executed in connection with the Liabilities, or given to secure
the repayment of the Liabilities) is illegal, uncollectible, legally impossible
or unenforceable, or the Credit Agreement or other documents or instruments
pertaining to the Liabilities have been forged or otherwise are irregular or not
genuine or authentic.

                  (e) Release of  Obligors.  Any full or partial  release of the
                      --------------------
liability  of  Borrower  on  the  Liabilities  or  any  part  thereof,   of  any
co-guarantors,  or any other Person now or hereafter liable, whether directly or
indirectly,  jointly,  severally,  or jointly and  severally,  to pay,  perform,
guarantee or assure the payment of the Liabilities or any part thereof, it being
recognized,  acknowledged and agreed by Guarantor that Guarantor may be required
to pay the  Liabilities  in full  without  assistance  or  support  of any other
Person, and Guarantor has not been induced to enter into this Guaranty Agreement
on the basis of a contemplation,  belief,  understanding or agreement that other
parties  other than the Borrower will be liable to perform the  Liabilities,  or
the Lenders will look to other parties to perform the Liabilities.

                  (f) Other Security. The taking or accepting of any other
                      --------------
security, collateral or guaranty, or other assurance of payment, for all or any
part of the Liabilities.

                  (g) Release of Collateral, etc. Any release, surrender,
                      --------------------------
exchange, subordination, deterioration, waste, loss or impairment (including
without limitation negligent, willful, unreasonable or unjustifiable impairment)
of any collateral, property or security, at any time existing in connection
with, or assuring or securing payment of, all or any part of the Liabilities.

                  (h) Care and Diligence. The failure of the Lenders or any
                      ------------------
other Person to exercise diligence or reasonable care in the preservation,
protection, enforcement, sale or other handling or treatment of all or any part

                                      -6-



of such collateral, property or security; provided, however, that Lenders shall
                                          --------  -------
act in a "commercially reasonable" manner as required by applicable provisions
of Article 9 of the Uniform Commercial Code as presently in effect in the State
of Texas when exercising their rights under that certain Pledge and Security
Agreement by and between Borrower and Administrative Agent of even date
herewith.

                  (i) Status of Liens. The fact that any collateral, security,
                      ---------------
security interest or lien contemplated or intended to be given, created or
granted as security for the repayment of the Liabilities shall not be properly
perfected or created, or shall prove to be unenforceable or subordinate to any
other security interest or lien, it being recognized and agreed by Guarantor
that Guarantor is not entering into this Guaranty Agreement in reliance on, or
in contemplation of the benefits of, the validity, enforceability,
collectability or value of any of the collateral for the Liabilities.

                  (j) Payments Rescinded. Any payment by Borrower to the Lenders
                      ------------------
is held to constitute a preference under the bankruptcy laws, or for any reason
the Lenders are required to refund such payment or pay such amount to Borrower
or someone else.

                  (k) Other Actions Taken or Omitted. Any other action taken or
                      ------------------------------
omitted to be taken with respect to the Credit Agreement, the Liabilities, or
the security and collateral therefor, whether or not such action or omission
prejudices Guarantor or increases the likelihood that Guarantor will be required
to pay the Liabilities pursuant to the terms hereof; it being the unambiguous
and unequivocal intention of Guarantor that Guarantor shall be obligated to pay
the Liabilities when due, notwithstanding any occurrence, circumstance, event,
action, or omission whatsoever, whether contemplated or uncontemplated, and
whether or not otherwise or particularly described herein, except for the full
and final payment and satisfaction of the Liabilities.

         Section 2.9 Right of Subrogation and Contribution. If Guarantor makes a
                     -------------------------------------
payment in respect of the Liabilities, it shall be subrogated to the rights of
the Lenders against the Borrower with respect to such payment and shall have the
rights of contribution against the other Subsidiary Guarantors set forth in
Section 2.9 of any other Guaranty Agreements; provided that Guarantor shall not
enforce its rights to any payment by way of subrogation or by exercising its
rights of contribution or reimbursement or the right to participate in any
security now or hereafter held by or for the benefit of the Lenders until all of
the Liabilities have been paid in full. The Guarantor agrees that after all the
Liabilities have been paid in full if its then current Net Payments are less
than the amount of its then current Contribution Obligation, Guarantor shall pay
to any other Subsidiary Guarantors an amount (together with any payments
required of the other Subsidiary Guarantors by Section 2.9 of each other
Guaranty Agreement) such that the Net Payments made by all Subsidiary Guarantors
in respect of the Liabilities shall be shared among all of the Subsidiary
Guarantors in a proportion equal to their respective Contribution Percentage;
provided, however, Guarantor need not make any such payment if at the time such
- --------  -------
payment is to be made Guarantor is illiquid and not making such payment will not
render any other Subsidiary Guarantor insolvent.

                                      -7-



                                   ARTICLE 3
                                   ---------
                         Representations and Warranties
                         ------------------------------

         Section 3.1 By Guarantor. In order to induce the Lenders to accept this
                     ------------
Guaranty Agreement, Guarantor represents and warrants to the Lenders (which
representations and warranties will survive the creation of the Liabilities and
any extension of credit thereunder) that:

                  (a) Benefit to Guarantor. Guarantor's guaranty pursuant to
                      --------------------
this Guaranty Agreement reasonably may be expected to benefit, directly or
indirectly, Guarantor.

                  (b) Existence. Guarantor is a corporation duly organized,
                      ---------
validly existing and in good standing under the laws of the State of Delaware.

                  (c) Power and Authorization. Guarantor is duly authorized and
                      -----------------------
empowered to execute, deliver and perform this Guaranty Agreement and all
necessary action on Guarantor's part requisite for the due execution, delivery
and performance of this Guaranty Agreement has been duly and effectively taken.

                  (d) Binding Obligations. This Guaranty Agreement constitutes
                      -------------------
valid and binding obligations of Guarantor, enforceable in accordance with its
terms, subject to applicable bankruptcy, insolvency, reorganization, moratorium
or other laws affecting creditors' rights generally and subject to general
principals of equity, regardless of whether considered in a proceeding in equity
or at law.

                  (e) Governmental Approvals; No Conflicts. This Guaranty
                      ------------------------------------
Agreement (a) does not require any consent or approval of, registration or
filing with, or any other action by, any Governmental Authority, except such as
have been obtained or made and are in full force and effect, (b) will not
violate any applicable law or regulation or the charter, by-laws or other
organizational documents of the Guarantor or any order of any Governmental
Authority, (c) will not violate or result in a default under any indenture,
agreement or other instrument binding upon the Guarantor or its assets, or give
rise to a right thereunder to require any payment to be made by the Guarantor,
and (d) will not result in the creation or imposition of any Lien on any asset
of the Guarantor.

                  (f) Solvency. The Guarantor hereby represents that (i) it is
                      --------
not insolvent as of the date hereof and will not be rendered insolvent as a
result of this Guaranty Agreement, (ii) it is not engaged in a business or a
transaction, or about to engage in a business or a transaction, for which any
property or assets remaining with such Guarantor thereafter is unreasonably
small capital, and (iii) it does not intend to incur, or believe it will incur,
debts that will be beyond its ability to pay as such debts mature.

         Section 3.2 No Representation by Lenders. Neither the Lenders nor any
                     ----------------------------
other Person has made any representation, warranty or statement to the Guarantor
in order to induce the Guarantor to execute this Guaranty Agreement.

                                      -8-



                                   ARTICLE 4
                                   ---------
                          Subordination of Indebtedness
                          -----------------------------

         Section 4.1 Subordination of All Guarantor Claims. As used herein, the
                     -------------------------------------
term "Guarantor Claims" shall mean all debts and liabilities of Borrower to
Guarantor, whether such debts and liabilities now exist or are hereafter
incurred or arise, or whether the obligation of Borrower thereon be direct,
contingent, primary, secondary, several, joint and several, or otherwise, and
irrespective of whether such debts or liabilities be evidenced by note,
contract, open account, or otherwise, and irrespective of the person or persons
in whose favor such debts or liabilities may, at their inception, have been, or
may hereafter be created, or the manner in which they have been or may hereafter
be acquired by Guarantor. The Guarantor Claims shall include without limitation
all rights and claims of Guarantor against Borrower arising as a result of
subrogation or otherwise as a result of Guarantor's payment of all or a portion
of the Liabilities. During the continuance of any Event of Default, Guarantor
shall not receive or collect, directly or indirectly, from Borrower or any other
party any amount upon the Guarantor Claims.

         Section 4.2 Claims in Bankruptcy. In the event of receivership,
                     --------------------
bankruptcy, reorganization, arrangement, debtor's relief, or other insolvency
proceedings involving Borrower as debtor, the Lenders shall have the right to
prove their claim in any proceeding, so as to establish their rights hereunder
and receive directly from the receiver, trustee or other court custodian,
dividends and payments which would otherwise be payable upon Guarantor Claims.
In such event, Guarantor hereby assigns such dividends and payments to the
Lenders. Should the Administrative Agent or any Lender receive, for application
upon the Liabilities, any such dividend or payment which is otherwise payable to
Guarantor, and which, as between Borrower and Guarantor, shall constitute a
credit upon the Guarantor Claims, then upon payment in full of the Liabilities,
Guarantor shall become subrogated to the rights of the Lenders to the extent
that such payments to the Lenders on the Guarantor Claims have contributed
toward the liquidation of the Liabilities, and such subrogation shall be with
respect to that portion of the Liabilities which would have been unpaid if the
Administrative Agent or a Lender had not received dividends or payments upon the
Guarantor Claims.

         Section 4.3 Payments Held in Trust. In the event that notwithstanding
                     ----------------------
Sections 4.1 and 4.2 above, Guarantor should receive any funds, payments, claims
or distributions which is prohibited by such Sections, Guarantor agrees to hold
in trust for the Lenders an amount equal to the amount of all funds, payments,
claims or distributions so received, and agrees that it shall have absolutely no
dominion over the amount of such funds, payments, claims or distributions except
to pay them promptly to the Administrative Agent, and Guarantor covenants
promptly to pay the same to the Administrative Agent.

         Section 4.4 Liens Subordinate. Guarantor agrees that any liens,
                     -----------------
security interests, judgment liens, charges or other encumbrances upon
Borrower's assets securing payment of the Guarantor Claims shall be and remain
inferior and subordinate to any liens, security interests, judgment liens,
charges or other encumbrances upon Borrower's assets securing payment of the
Liabilities, regardless of whether such encumbrances in favor of Guarantor, the
Administrative Agent or the Lenders presently exist or are hereafter created or
attach. Without the prior written consent of the Lenders, Guarantor shall not
(a) exercise or enforce any creditor's right it may have against the Borrower,

                                      -9-



or (b) foreclose, repossess, sequester or otherwise take steps or institute any
action or proceeding (judicial or otherwise, including without limitation the
commencement of or joinder in any liquidation, bankruptcy, rearrangement,
debtor's relief or insolvency proceeding) to enforce any lien, mortgages, deeds
of trust, security interest, collateral rights, judgments or other encumbrances
on assets of Borrower held by Guarantor.

         Section 4.5 Notation of Records. All promissory notes, or other
                     -------------------
instruments evidencing the Guarantor Claims accepted by or held by Guarantor (if
any) shall contain a specific written notice thereon that the indebtedness
evidenced thereby is subordinated under the terms of this Guaranty Agreement.

                                   ARTICLE 5
                                   ---------
                                  Miscellaneous
                                  -------------

         Section 5.1 Successors and Assigns. This Guaranty Agreement is and
                     ----------------------
shall be in every particular available to the successors and assigns of the
Lenders and is and shall always be fully binding upon the legal representatives,
heirs, successors and assigns of Guarantor, notwithstanding that some or all of
the monies, the repayment of which this Guaranty Agreement applies, may be
actually advanced after any bankruptcy, receivership, reorganization, death,
disability or other event affecting Guarantor.

         Section 5.2 Notices. Any notice or demand to Guarantor under or in
                     -------
connection with this Guaranty Agreement may be given and shall conclusively be
deemed and considered to have been given and received in accordance with Section
12.02 of the Credit Agreement, addressed to Guarantor at the address on the
signature page hereof or at such other address provided to the Administrative
Agent in writing.

         Section 5.3 Business and Financial Information. The Guarantor will
                     ----------------------------------
promptly furnish to the Administrative Agent and the Lenders from time to time
upon request such information regarding the business and affairs and financial
condition of the Guarantor and its subsidiaries as the Administrative Agent and
the Lenders may reasonably request.

         Section 5.4 Choice of Law. This Guaranty Agreement (including, but not
                     -------------
limited to, the validity and enforceability hereof) shall be governed by, and
construed in accordance with, the laws of the State of Texas.

         Section 5.5 Invalidity. In the event that any one or more of the
                     ----------
provisions contained in this Guaranty Agreement shall, for any reason, be held
invalid, illegal or unenforceable in any respect, such invalidity, illegality or
unenforceability shall not affect any other provision of this Guaranty
Agreement.

         SECTION 5.6 ENTIRE AGREEMENT. THIS WRITTEN GUARANTY AGREEMENT EMBODIES
                     ----------------
THE ENTIRE AGREEMENT AND UNDERSTANDING BETWEEN THE LENDERS AND THE GUARANTOR AND
SUPERSEDES ALL OTHER AGREEMENTS AND UNDERSTANDINGS BETWEEN SUCH PARTIES RELATING
TO THE SUBJECT MATTER HEREOF AND THEREOF. THIS WRITTEN GUARANTY AGREEMENT
REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED
BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE

                                      -10-



PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.



                         [SIGNATURES BEGIN ON NEXT PAGE]

                                      -11-





         WITNESS THE EXECUTION HEREOF, effective as of the 7th day of April,
2005.


GUARANTOR:                   NPC INC.
- ---------


                             By:   /S/ DAVID W. HONEYFIELD
                                   -----------------------
                                   David W. Honeyfield
                                   Vice President - Finance

                             Address: 550 N, 31st Street, Suite 500
                                      Billings, MT  59103

                                          with copy to:

                                      1776 Lincoln Street, Suite 700
                                      Denver, CO  80203


ADMINISTRATIVE AGENT:        WACHOVIA BANK, NATIONAL
- --------------------         ASSOCIATION, as Administrative Agent


                             By:    /S/ PHILIP J. TRINDER
                                    ---------------------
                             Name:  Philip J. Trinder
                             Title: Vice President

                                      -12-

EX-10

                                                                    EXHIBIT 10.5

- --------------------------------------------------------------------------------


               AMENDED AND RESTATED PLEDGE AND SECURITY AGREEMENT
               --------------------------------------------------



                                     Between

                    ST. MARY LAND & EXPLORATION COMPANY,
                                   as Pledgor



                                       and



          WACHOVIA BANK, NATIONAL ASSOCIATION, as Administrative Agent,
                                as Secured Party



                          Effective as of April 7, 2005








- --------------------------------------------------------------------------------




               AMENDED AND RESTATED PLEDGE AND SECURITY AGREEMENT
               --------------------------------------------------


         THIS  AMENDED  AND  RESTATED  PLEDGE  AND  SECURITY  AGREEMENT  is made
effective as of April 7, 2005,  by ST. MARY LAND &  EXPLORATION  COMPANY,  a
Delaware  corporation with principal offices at 1776 Lincoln Street,  Suite 700,
Denver,  Colorado  80203  ("Pledgor"),  in  favor  of  WACHOVIA  BANK,  NATIONAL
                            -------
ASSOCIATION,  a national  banking  association with offices at 301 South College
Street,  Charlotte,  North  Carolina  28288,  as  Administrative  Agent (in such
capacity,  the  "Secured  Party") for the benefit of the several  lenders now or
                 --------------
hereafter parties to the hereinafter defined Credit Agreement  (individually,  a
"Lender" and collectively, the "Lenders").
 ------                         -------

                                    RECITALS
                                    --------

         A. Pursuant to that certain  Credit  Agreement  dated as of January 27,
2003, among Pledgor,  Secured Party and the lenders party thereto (the "Existing
                                                                        --------
Lenders") (such Credit  Agreement,  as amended and  supplemented,  the "Existing
- -------                                                                 --------
Credit  Agreement"),  Pledgor  received  certain loans and  extensions of credit
- -----------------
under a revolving  credit  facility made available to Pledgor under the Existing
Credit Agreement, up to the aggregate principal amount of $300,000,000.

         B.  The  Existing  Lenders  conditioned  their  obligations  under  the
Existing  Credit  Agreement  upon the  execution and delivery by Pledgor of that
certain  Pledge  and  Security  Agreement  dated as of  January  27,  2003  (the
"Existing Pledge and Security Agreement").
 --------------------------------------

         C. Pledgor, Secured Party and the Lenders have amended and restated the
Existing  Credit  Agreement by entering  into that certain  Amended and Restated
Credit  Agreement  dated of even date  herewith  (as  amended,  supplemented  or
otherwise modified from time to time, the "Credit Agreement"), whereby, pursuant
                                           ----------------
to which,  the Lenders have agreed to make certain  loans to and extend  certain
credit for the account of Pledgor  subject to the  limitations  set forth in the
Credit Agreement. The initial loans under the Credit Agreement have been used by
Pledgor to renew, rearrange, modify and extend all amounts outstanding under the
Existing Credit Agreement.

         D. The Secured Party and the Lenders have conditioned their obligations
under the Credit  Agreement  upon the  execution and delivery by Pledgor of this
Amended and Restated  Pledge and Security  Agreement,  and Pledgor has agreed to
execute and deliver this Amended and Restated Pledge and Security Agreement.

         NOW, THEREFORE, (i) in order to comply with the terms and conditions of
the Credit  Agreement,  (ii) to induce the Lenders,  at any time or from time to
time, to loan monies and extend credit, with or without security,  to or for the
account of Pledgor in accordance with the terms of the Credit  Agreement,  (iii)
at the special  insistence  and request of the Lenders,  and (iv) for other good
and  valuable  consideration,  the  receipt and  sufficiency  of which is hereby
acknowledged,  Pledgor and Secured  Party hereby agree that the Existing  Pledge
and Security Agreement is hereby amended and restated in its entirety to read as
follows:

                                       1



                                   ARTICLE 1

                                SECURITY INTEREST
                                -----------------

         Section  1.01 Pledge.  Pledgor  hereby  pledges,  assigns and grants to
                       ------
Secured  Party a security  interest  in and right of set-off  against the assets
referred to in Section 1.02 (the  "Collateral") to secure the prompt payment and
performance  of  the   "Obligations"  (as  defined  in  Section  2.02)  and  the
                        -----------
performance  by  Pledgor  of this  Amended  and  Restated  Pledge  and  Security
Agreement.

         Section 1.02 Collateral. The Collateral consists of the following types
                      ----------
or items of property which are owned by Pledgor:

                  (a) The  securities  described  or  referred  to in  Exhibit A
         attached hereto and made a part hereof.

                  (b) (i) The certificates or instruments,  if any, representing
         such  membership  interests and such units,  (ii) all dividends  (cash,
         stock or otherwise), cash, instruments,  rights to subscribe,  purchase
         or sell and all other rights and property  from time to time  received,
         receivable  or otherwise  distributed  in respect of or in exchange for
         any or all of such  membership  interests  or  such  units,  (iii)  all
         replacements and  substitutions  for any of the property referred to in
         this Section 1.02, including, without limitation,  claims against third
         parties, and (iv) the proceeds,  interest,  profits and other income of
         or on any of the property referred to in this Section 1.02.

It is expressly  contemplated  that additional  securities or other property may
from time to time be pledged, assigned or granted to Secured Party as additional
security for the Obligations,  and the term "Collateral" as used herein shall be
                                             ----------
deemed  for all  purposes  hereof  to  include  all such  additional  membership
interests,  units and property,  together  with all other  property of the types
described above related thereto.

         Section 1.03 Transfer of Collateral.  All  certificates  or instruments
                      ----------------------
representing or evidencing the Pledged Securities shall be delivered to and held
pursuant  hereto by Secured  Party or a Person  designated  by Secured Party and
shall be in suitable form for transfer by delivery,  or shall be  accompanied by
duly executed instruments of transfer or assignment in blank, or (in the case of
either certificated or uncertificated  securities) Secured Party shall have been
provided with evidence that the Pledged Securities have been otherwise delivered
to Secured Party in accordance  with Section 8.301 of the Code,  all in form and
substance satisfactory to Secured Party. Notwithstanding the preceding sentence,
at Secured  Party's  discretion,  all Pledged  Securities  must be  delivered or
transferred in such manner as to permit  Secured Party to meet the  requirements
of  Section  8.303(a)(3)  of the Code to the  extent of its  security  interest.
Secured Party shall have the right,  at any time in its  discretion  and without
notice to Pledgor, to transfer to or to register in the name of Secured Party or
any of its  nominees any or all of the Pledged  Securities,  subject only to the
revocable  rights  specified in Section 4.02.  In addition,  Secured Party shall
have the right at any time to exchange certificates or instruments  representing
or evidencing  Pledged  Securities for certificates or instruments of smaller or
larger denominations.

                                       2



                                   ARTICLE 2

                                   DEFINITIONS
                                   -----------

         Section 2.01 Terms Defined Above.  As used in this Amended and Restated
                      -------------------
Pledge and Security  Agreement,  the terms defined above shall have the meanings
respectively assigned to them.

         Section 2.02 Certain Definitions.  As used in this Amended and Restated
                      -------------------
Pledge and Security  Agreement,  the  following  terms shall have the  following
meanings, unless the context otherwise requires:

                  "Agreement"   means  this  Amended  and  Restated  Pledge  and
                   ---------
         Security  Agreement,  as the  same may  from  time to time be  amended,
         supplemented or otherwise modified.

                  "Code"  means the  Uniform  Commercial  Code as  presently  in
                   ----
         effect in the State of Texas,  Articles 1 through 9.  Unless  otherwise
         indicated  by the context  herein,  all  uncapitalized  terms which are
         defined in the Code shall have  their  respective  meanings  as used in
         Articles 8 and 9 of the Code.

                  "Event of Default" means any event specified in Section 6.01.
                   ----------------

                  "Obligations"  means  the  collective  reference  to  (a)  all
                   -----------
         indebtedness,  obligations  and  liabilities  of  Pledgor  under  or in
         connection with the Loan Documents,  including, without limitation, the
         unpaid  principal  of and interest on the Loans and the LC Exposure and
         all other  obligations and liabilities of Pledgor  (including,  without
         limitation,  interest  accruing at the then applicable rate provided in
         the  Credit  Agreement  after  the  maturity  of the  Loans  and the LC
         Exposure and interest  accruing at the then applicable rate provided in
         the Credit Agreement after the filing of any petition in bankruptcy, or
         the commencement of any insolvency,  reorganization or like proceeding,
         relating  to  Pledgor,  whether  or  not a  claim  for  post-filing  or
         post-petition  interest is allowed in such proceeding) to Secured Party
         or any Lender (or, in the case of any Swap Agreement referred to below,
         any Affiliate of any Lender),  whether direct or indirect,  absolute or
         contingent,  due  or to  become  due,  or  now  existing  or  hereafter
         incurred,  which may arise under,  out of, or in connection  with,  the
         Credit  Agreement,  the  other  Loan  Documents  or any Swap  Agreement
         entered  into by  Pledgor  with any  Lender  (or any  Affiliate  of any
         Lender),  or any other document made,  delivered or given in connection
         therewith,  in each case  whether on account  of  principal,  interest,
         reimbursement  obligations,  fees,  indemnities,   costs,  expenses  or
         otherwise  (including,  without  limitation,  all  reasonable  fees and
         disbursements  of counsel to Secured  Party or to the Lenders  that are
         required  to be paid by  Pledgor  pursuant  to the  terms of any of the
         foregoing  agreements),  and (b) all  obligations  of Pledgor which may
         arise  under or in  connection  with this  Agreement  or any other Loan
         Document to which Pledgor is a party.

                  The  term   "Obligations"   shall   mean   all   indebtedness,
                               -----------
         obligations and liabilities described,  referred to or mentioned in the
         immediately  preceding paragraph of this definition,  and all renewals,
         rearrangements,  increases, substitutions,  replacements and extensions

                                       3



         for any period thereof and  amendments,  supplements  or  modifications
         thereto, in whole or in part.

                  "Obligor"  means  any  Person,  other  than  Pledgor,   liable
                   -------
         (whether  directly or  indirectly,  primarily or  secondarily)  for the
         payment  or  performance  of any of the  Obligations  whether as maker,
         co-maker, endorser, guarantor,  accommodation party, general partner or
         otherwise.

                  "Pledged  Securities"  means all of the  securities  and other
                   -------------------
         property  (whether or not the same  constitutes a "security"  under the
         Code)  referred  to in Section  1.02(a) or 1.02(b)  and all  additional
         securities, if any, constituting Collateral under this Agreement.

         Section 2.03 Credit Agreement Terms.  Unless otherwise  defined herein,
                      ----------------------
all terms  beginning  with a capital  letter  which are  defined  in the  Credit
Agreement shall have the same meanings herein as therein.

         Section 2.04 Section References.  Unless otherwise provided for herein,
                      ------------------
all references herein to Sections are to Sections of this Agreement.

                                   ARTICLE 3

                         REPRESENTATIONS AND WARRANTIES
                         ------------------------------

         In order to induce  Secured  Party to accept  this  Agreement,  Pledgor
represents and warrants to Secured Party (which  representations  and warranties
will survive the creation and payment of the Obligations) that:

         Section 3.01 Ownership of Collateral; Encumbrances. Except as otherwise
                      -------------------------------------
permitted by the Credit Agreement, Pledgor is the record and beneficial owner of
the  Collateral  free and clear of any Lien  except  for the  security  interest
created by this  Agreement,  and Pledgor has full right,  power and authority to
pledge, assign and grant a security interest in the Collateral to Secured Party.

         Section 3.02 No Required Consent. No authorization,  consent,  approval
                      -------------------
or other action by, and no notice to or filing with, any governmental  authority
or  regulatory  body (other than the filing of financing  statements in favor of
Secured Party) is required for (i) the due execution,  delivery and  performance
by Pledgor of this Agreement, (ii) the grant by Pledgor of the security interest
granted by this Agreement or (iii) the perfection of such security interest.

         Section 3.03 Pledged Securities.  The Pledged Securities have been duly
                      ------------------
authorized and validly issued, and are fully paid and non-assessable.

         Section 3.04 First Priority  Security  Interest.  The pledge of Pledged
                      ----------------------------------
Securities  pursuant to this  Agreement,  the  delivery to Secured  Party of the
certificates  representing  the Pledged  Securities  accompanied by stock powers
duly executed in blank and the filing of appropriate financing statements in the
relevant locations create a valid and perfected first priority security interest

                                       4


in the  Collateral,  enforceable  against  Pledgor  and all  third  parties  and
securing payment of the Obligations.

                                   ARTICLE 4

                            COVENANTS AND AGREEMENTS
                            ------------------------

         Pledgor  will at all times  comply with the  covenants  and  agreements
contained in this Article 4, from the date hereof and for so long as any part of
the Obligations  (other than any indemnity which is not yet due and payable) are
outstanding.

         Section 4.01 Sale, Disposition or Encumbrance of Collateral.  Except as
                      ----------------------------------------------
otherwise not prohibited by the Credit Agreement or this Agreement, Pledgor will
not in any way  encumber any of the  Collateral  (or permit or suffer any of the
Collateral to be encumbered) or sell, pledge,  assign, lend or otherwise dispose
of or transfer  any of the  Collateral  to or in favor of any Person  other than
Secured Party.

         Section 4.02 Voting Rights; Dividends or Distributions.  Until both (i)
                      -----------------------------------------
an Event of Default shall have  occurred and be  continuing  and (ii) either (a)
the Loans have become due and payable at their stated maturity and have not been
paid, (b) the Loans have been declared due and payable  pursuant to Article X of
the  Credit  Agreement,  or (c)  Secured  Party has given  notice to  Pledgor of
Secured Party's intent to exercise its rights under Section 6.02:

                  (a) Pledgor  shall be entitled to exercise any and all voting,
         management  and/or  other  consensual  rights and powers  inuring to an
         owner  of the  Collateral  or any  part  thereof  for any  purpose  not
         inconsistent  with  the  terms of this  Agreement  and the  other  Loan
         Documents.

                  (b) Pledgor  shall be entitled to receive and retain (free and
         clear of and no longer  subject to this  Agreement  or the Lien created
         pursuant to this  Agreement) any and all dividends,  distributions  and
         interest paid in respect of the Collateral, provided, however, that any
                                                     --------  -------
         and all

                           (i) dividends and interest paid or payable other than
                  in cash in respect  of,  and  instruments  and other  property
                  received,  receivable or otherwise  distributed in respect of,
                  or  in  exchange  for  (including,   without  limitation,  any
                  certificate,  share or  interest  purchased  or  exchanged  in
                  connection  with a tender  offer  or  merger  agreement),  any
                  Collateral,

                           (ii)  dividends  and  other   distributions  paid  or
                  payable  in cash in respect of any  Collateral  in  connection
                  with  a  partial  or  total  liquidation  or  dissolution,  or
                  reclassification, and

                           (iii) cash paid, payable or otherwise  distributed in
                  respect of principal of, or in  redemption  of, or in exchange
                  for, any Collateral,

shall be, and shall be promptly delivered to Secured Party to hold as,

                                       5



Collateral  and shall,  if  received  by  Pledgor,  be received in trust for the
benefit of Secured  Party,  be  segregated  from the other  property or funds of
Pledgor,  and be promptly  delivered to Secured  Party as Collateral in the same
form as so  received  (with any  necessary  endorsement)  ),  provided  further,
                                                              --------  -------
however,  in no event shall the foregoing  proviso be applicable  to, or prevent
the Pledgor from receiving and retaining any securities  that are not pledged or
intended or required to be pledged to the Secured Party pursuant to any Security
Instrument, including this Agreement.

         Section 4.03 Records and  Information.  Pledgor shall keep accurate and
                      ------------------------
complete records of the Collateral (including proceeds, payments, distributions,
income and profits).  Pledgor will promptly  provide  written  notice to Secured
Party of all  information  which in any way affects the filing of any  financing
statement or other public notices or recordings  pertaining to the perfection of
a security  interest in the Collateral,  or the delivery and possession of items
of  Collateral  for  the  purpose  of  perfecting  a  security  interest  in the
Collateral.

         Section 4.04 Certain Liabilities.  Pledgor hereby assumes all liability
                      -------------------
for the  Collateral,  the  security  interest  created  hereunder  and any  use,
possession, maintenance,  management, enforcement or collection of any or all of
the Collateral.

         Section 4.05 Further  Assurances.   Upon the request of Secured  Party,
                      -------------------
Pledgor shall (at Pledgor's  expense) execute and deliver all such  assignments,
certificates,  instruments,  securities, financing statements,  notifications to
financial intermediaries,  clearing corporations, issuers of securities or other
third parties or other  documents and give further  assurances  and do all other
acts and  things as Secured  Party may  reasonably  request  to perfect  Secured
Party's  interest in the Collateral or to protect,  enforce or otherwise  effect
Secured Party's rights and remedies hereunder.

         Section 4.06 Rights to Sell.    If Secured  Party  shall  determine  to
                      --------------
exercise its rights to sell all or any of the Collateral  pursuant to its rights
hereunder,  Pledgor agrees that, upon request of Secured Party, Pledgor will, at
its own expense:

                  (a) execute and  deliver,  and use all  reasonable  efforts to
         cause each  issuer of the  Collateral  contemplated  to be sold and the
         directors  and  officers  thereof  to  execute  and  deliver,  all such
         instruments  and  documents,  and do or cause to be done all such other
         acts and things,  as may be necessary or, in the reasonable  opinion of
         Secured  Party,   advisable  to  register  such  Collateral  under  the
         provisions of the  Securities Act of 1933, as from time to time amended
         (the  "Securities  Act"),  if such  registration  is, in the reasonable
         opinion of Secured  Party,  necessary  or  advisable to effect a public
         distribution of the Collateral, and to cause the registration statement
         relating  thereto to become  effective and to remain effective for such
         period as prospectuses are required by law to be furnished, and to make
         all amendments and  supplements  thereto and to the related  prospectus
         which,  in the reasonable  opinion of Secured  Party,  are necessary or
         advisable,  all in conformity  with the  requirements of the Securities
         Act and the  rules  and  regulations  of the  Securities  and  Exchange
         Commission applicable thereto;

                  (b) use all reasonable efforts to qualify the Collateral under
         the state  securities  or "Blue Sky" laws and to obtain  all  necessary
         governmental approvals for the sale of the Collateral,  as requested by
         Secured Party;

                                       6



                  (c) use all  reasonable  efforts to cause each such  issuer to
         make  available to its security  holders,  as soon as  practicable,  an
         earnings  statement  which will satisfy the provisions of Section 11(a)
         of the Securities Act; and

                  (d) use all  reasonable  efforts to do or cause to be done all
         such  others acts and things as may be  necessary  to make such sale of
         the  Collateral or any part thereof valid and binding and in compliance
         with applicable law.

Pledgor further  acknowledges  the  impossibility  of ascertaining the amount of
damages  which would be  suffered  by Secured  Party by reason of the failure by
Pledgor to perform  any of the  covenants  contained  in this  Section  4.06 and
consequently agrees that if Pledgor shall fail to perform any of such covenants,
it shall pay (to the extent permitted by law), as liquidated damages, and not as
penalty,  an  amount  (in no event to exceed  the  amount  of  Obligations  then
outstanding) equal to the value of the Collateral  affected by Pledgor's failure
to perform any of the  covenants  contained in this Section 4.06 on the date the
Secured Party shall demand compliance with this Section 4.06.

                                   ARTICLE 5

                   RIGHTS, DUTIES AND POWERS OF SECURED PARTY
                   ------------------------------------------

         The following rights, duties and powers of Secured Party are applicable
irrespective of whether an Event of Default occurs and is continuing:

         Section 5.01 Discharge Encumbrances.  Secured Party may, at its option,
                      ----------------------
three (3) Business Days after  receipt by Pledgor of prior  written  notice from
Secured Party of its intent to do so,  discharge any Liens at any time levied or
placed on the Collateral  that are  prohibited by the Credit  Agreement and that
are not being contested in good faith by appropriate proceedings. Pledgor agrees
to reimburse  Secured Party within five (5) days after demand for any payment so
made, plus interest  thereon from the date of Secured Party's demand at the rate
per  annum  equal to 2% plus the rate  applicable  to ABR Loans as  provided  in
Section 3.02(a) of the Credit Agreement.

         Section 5.02 Transfer of Collateral. Subject to the terms of the Credit
                      ----------------------
Agreement,  Secured Party may transfer any or all of the  Obligations,  and upon
any such  transfer  Secured Party may transfer its interest in any or all of the
Collateral and shall be fully discharged thereafter from all liability therefor.
Any transferee of the Collateral shall be vested with all rights, powers, duties
and remedies of Secured Party hereunder.

         Section 5.03 Cumulative  and Other  Rights.    The  rights,  powers and
                      -----------------------------
remedies of Secured Party  hereunder  are in addition to all rights,  powers and
remedies given by law or in equity.  The exercise by Secured Party of any one or
more of the rights,  powers and  remedies  herein  shall not be  construed  as a
waiver of any other rights, powers and remedies,  including, without limitation,
any other rights of set-off.

                                       7



         Section 5.04 Disclaimer of Certain Duties.   The powers  conferred upon
                      ----------------------------
Secured Party by this  Agreement  are to protect its interest in the  Collateral
and shall not impose any duty upon  Secured  Party to exercise  any such powers.
Pledgor  hereby agrees that Secured Party shall not be liable for, nor shall the
indebtedness  evidenced by the  Obligations be diminished  by,  Secured  Party's
delay or  failure  to collect  upon,  foreclose,  sell,  take  possession  of or
otherwise obtain value for the Collateral.

         Section 5.05 Custody and Preservation of the Collateral.  Secured Party
                      ------------------------------------------
shall  be  deemed  to  have  exercised   reasonable  care  in  the  custody  and
preservation  of the  Collateral in its possession if the Collateral is accorded
treatment  substantially  equal to that which comparable  secured parties accord
comparable  collateral,  it being understood and agreed,  however,  that Secured
Party shall not have  responsibility  for (i) ascertaining or taking action with
respect to calls, conversions,  exchanges,  maturities, tenders or other matters
relative to any  Collateral,  whether or not  Secured  Party has or is deemed to
have knowledge of such matters,  or (ii) taking any necessary  steps to preserve
rights against Persons or entities with respect to any Collateral.

                                   ARTICLE 6

                                EVENTS OF DEFAULT
                                -----------------

         Section 6.01 Events.    An "Event of Default" (as defined in the Credit
                      ------
Agreement)  which has occurred and is  continuing  shall  constitute an Event of
Default under this Agreement.

         Section 6.02 Remedies.  Upon the occurrence and during the  continuance
                      --------
of any Event of  Default,  Secured  Party  may take any or all of the  following
actions  without notice or demand to Pledgor (except that Secured Party will not
take any  action  in the case of  paragraphs  (b) and (f) below  until  five (5)
Business Days after  receipt by Pledgor of written  notice from Secured Party of
its intent to do so):

                  (a) Subject to applicable  provisions  contained in the Credit
         Agreement,  declare  all or part of the  indebtedness  pursuant  to the
         Obligations immediately due and payable and enforce payment of the same
         by Pledgor or any Obligor.

                  (b) Sell, in one or more sales and in one or more parcels,  or
         otherwise  dispose of any or all of the Collateral in any  commercially
         reasonable  manner as Secured  Party may elect,  in a public or private
         transaction,  at any  location as deemed  reasonable  by Secured  Party
         either  for cash or  credit or for  future  delivery  at such  price as
         Secured Party may reasonably  deem fair, and (unless  prohibited by the
         Uniform  Commercial  Code, as adopted in any  applicable  jurisdiction)
         Secured Party may be the purchaser of any or all Collateral so sold and
         may apply upon the  purchase  price  therefor any  Obligations  secured
         hereby.  Any such sale or transfer by Secured Party either to itself or
         to any other Person shall be absolutely free from any claim of right by
         Pledgor, including any equity or right of redemption, stay or appraisal
         which  Pledgor  has or may have  under any rule of law,  regulation  or
         statute  now  existing  or  hereafter  adopted.  Upon any such  sale or
         transfer,  Secured  Party shall have the right to  deliver,  assign and
         transfer to the purchaser or transferee  thereof the Collateral so sold
         or transferred.  If Secured Party  reasonably  deems it advisable to do

                                       8



         so, it may  restrict  the  bidders  or  purchasers  of any such sale or
         transfer to Persons or entities who will  represent and agree that they
         are  purchasing  the  Collateral for their own account and not with the
         view to the  distribution or resale of any of the  Collateral.  Secured
         Party may, at its  discretion,  provide for a public sale, and any such
         public  sale  shall  be held at such  time  or  times  within  ordinary
         business  hours and at such place or places as Secured Party may fix in
         the notice of such sale.  Secured  Party shall not be obligated to make
         any sale pursuant to any such notice. Secured Party may, without notice
         or  publication,  adjourn any public or private sale by announcement at
         any time and place  fixed for such  sale,  and such sale may be made at
         any time or place to which the same may be so  adjourned.  In the event
         any sale or transfer  hereunder is not completed or is defective in the
         opinion of Secured  Party,  such sale or transfer shall not exhaust the
         rights of Secured  Party  hereunder,  and Secured  Party shall have the
         right to cause one or more  subsequent  sales or  transfers  to be made
         hereunder.  If only part of the Collateral is sold or transferred  such
         that the Obligations remain outstanding (in whole or in part),  Secured
         Party's rights and remedies hereunder shall not be exhausted, waived or
         modified,  and Secured Party is  specifically  empowered to make one or
         more successive  sales or transfers  until all the Collateral  shall be
         sold or transferred and all the Obligations are paid. In the event that
         Secured Party elects not to sell the Collateral,  Secured Party retains
         its rights to dispose of or utilize the Collateral or any part or parts
         thereof in any manner authorized or permitted by law or in equity,  and
         to apply the proceeds of the same towards payment of the Obligations.

                  (c) Apply proceeds of the disposition of the Collateral to the
         Obligations in any manner elected by Secured Party and permitted by the
         Code or otherwise  permitted by law or in equity.  Such application may
         include,  without limitation,  the reasonable attorneys' fees and legal
         expenses incurred by Secured Party.

                  (d)  Appoint  any Person as agent to  perform  any act or acts
         necessary  or incident to any sale or transfer by Secured  Party of the
         Collateral.

                  (e) Receive, change the address for delivery, open and dispose
         of mail  addressed  to  Pledgor,  and to  execute,  assign and  endorse
         negotiable and other instruments for the payment of money, documents of
         title or other  evidences of payment,  shipment or storage for any form
         of Collateral on behalf of and in the name of Pledgor.

                  (f) Exercise all other rights and remedies permitted by law or
         in equity.

         Section 6.03 Attorney-in-Fact.   Pledgor  hereby  irrevocably  appoints
                      ----------------
Secured Party as Pledgor's  attorney-in-fact,  with full  authority in the place
and stead of Pledgor and in the name of Pledgor or otherwise,  from time to time
in Secured Party's  discretion upon the occurrence and during the continuance of
an Event of Default, but at Pledgor's cost and expense,  three (3) Business Days
after  receipt by Pledgor of written  notice from Secured Party of its intent to
do so, to take any action and to execute any assignment,  certificate, financing
statement, stock power, notification, document or instrument which Secured Party
may deem  necessary or advisable to accomplish  the purposes of this  Agreement,
including,  without limitation,  to receive, endorse and collect all instruments
made payable to Pledgor  representing  any dividend,  interest  payment or other

                                       9



distribution  in respect of the  Collateral or any part thereof and to give full
discharge for the same.

         Section 6.04 Liability for Deficiency. If any sale or other disposition
                      ------------------------
of  Collateral  by  Secured  Party in  compliance  with the Loan  Documents  and
applicable law or any other action of Secured Party hereunder in compliance with
the Loan Documents and  applicable law results in reduction of the  Obligations,
such action will not release Pledgor from its liability to Secured Party for any
unpaid  Obligations,  including (to the extent permitted by law) costs,  charges
and expenses  incurred in the liquidation of Collateral,  together with interest
thereon until paid at the rate per annum equal to 2% plus the rate applicable to
ABR Loans as provided in Section 3.02(a) of the Credit  Agreement,  and the same
shall be immediately due and payable to Secured Party at Secured Party's address
set forth in the opening paragraph hereof.

         Section 6.05 Reasonable Notice. If any applicable  provision of any law
                      -----------------
requires  Secured Party to give reasonable  notice of any sale or disposition or
other action,  Pledgor  hereby agrees that ten days' prior written  notice shall
constitute  reasonable notice thereof.  Such notice, in the case of public sale,
shall  state the time and place  fixed for such sale and, in the case of private
sale, the time after which such sale is to be made.

         Section 6.06 Pledged  Securities.    Upon both (i) the  occurrence  and
                      -------------------
during  the  continuance  of an Event of Default  and (ii)  either (a) the Loans
becoming  due and payable at their stated  maturity and not paid,  (b) the Loans
being declared due and payable pursuant to Article X of the Credit Agreement, or
(c) Secured  Party giving  prior  written  notice to Pledgor of Secured  Party's
intent to exercise its rights under Section 6.02:

                  (a) All  rights  of  Pledgor  to  receive  the  dividends  and
         interest payments which it would otherwise be authorized to receive and
         retain pursuant to Section 4.02 shall cease,  and all such rights shall
         thereupon  become vested in Secured Party who shall  thereupon have the
         sole  right  to  receive  and hold as  Collateral  such  dividends  and
         interest payments,  but Secured Party shall have no duty to receive and
         hold such dividends and interest  payments and shall not be responsible
         for any failure to do so or delay in so doing.

                  (b) All dividends and interest  payments which are received by
         Pledgor  contrary  to the  provisions  of this  Section  6.06  shall be
         received in trust for the benefit of Secured Party, shall be segregated
         from other funds of Pledgor and shall be promptly  paid over to Secured
         Party as Collateral in the same form as so received (with any necessary
         endorsement).

                  (c)  Secured   Party  may  exercise  any  and  all  rights  of
         conversion,  exchange,  subscription or any other rights, privileges or
         options  pertaining to any of the Pledged  Securities as if it were the
         absolute  owner thereof,  including  without  limitation,  the right to
         exchange at its discretion,  any and all of the Pledged Securities upon
         the merger,  consolidation,  reorganization,  recapitalization or other
         readjustment  of any  issuer  of such  Pledged  Securities  or upon the
         exercise by any such issuer or Secured Party of any right, privilege or
         option  pertaining to any of the Pledged  Securities  and in connection
         therewith, to deposit and deliver any and all of the Pledged Securities
         with any  committee,  depository,  transfer  agent,  registrar or other
         designated  agency upon such terms and  conditions as it may determine,
         all without  liability except to account for property actually received
         by it, but  Secured  Party  shall have no duty to  exercise  any of the

                                       10



         aforesaid  rights,  privileges or options and shall not be  responsible
         for any failure to do so or delay in so doing.

         Section 6.07 Non-judicial Enforcement.  To the extent permitted by law,
                      ------------------------
Secured Party may enforce its rights hereunder without prior judicial process or
judicial  hearing,  and to the extent permitted by law Pledgor  expressly waives
any and all legal rights which might otherwise  require Secured Party to enforce
its rights by judicial process.

                                   ARTICLE 7

                            MISCELLANEOUS PROVISIONS
                            ------------------------

         Section 7.01 Notices.    Any notice  required or  permitted to be given
                      -------
under or in  connection  with this  Agreement  shall be in writing  and shall be
mailed  by first  class or  express  mail,  postage  prepaid,  or sent by telex,
telegram,  telecopy  or other  similar  form of rapid  written  transmission  or
personally  delivered to the receiving party. All such  communications  shall be
mailed, sent or delivered at the address  respectively  indicated in the opening
paragraph hereof or at such other address as either party may have furnished the
other party in writing.  Any  communication  so  addressed  and mailed  shall be
deemed  to  be  given  upon  receipt,  any  notice  so  sent  by  rapid  written
transmission  shall be deemed to be given when receipt of such  transmission  is
acknowledged by the receiving  operator or equipment,  and any  communication so
delivered in person shall be deemed to be given when  receipted  for or actually
received by Pledgor or Secured Party, as the case may be.

         Section 7.02 Amendments  and Waivers.   Secured  Party's  acceptance of
                      -----------------------
partial or delinquent  payments or any forbearance,  failure or delay by Secured
Party in exercising any right,  power or remedy  hereunder shall not be deemed a
waiver of any  obligation of Pledgor or any Obligor,  or of any right,  power or
remedy of Secured Party; and no partial  exercise of any right,  power or remedy
shall preclude any other or further exercise  thereof.  Secured Party may remedy
any Event of Default  hereunder or in connection  with the  Obligations  without
waiving the Event of Default so remedied.  Pledgor hereby agrees that if Secured
Party  agrees to a waiver  of any  provision  hereunder,  or an  exchange  of or
release of the  Collateral,  or the  addition or release of any Obligor or other
Person,  any such action shall not constitute a waiver of any of Secured Party's
other  rights or of  Pledgor's  obligations  hereunder.  This  Agreement  may be
amended only by an instrument in writing executed jointly by Pledgor and Secured
Party and may be supplemented only by documents  delivered or to be delivered in
accordance with the express terms hereof.

         Section 7.03 Copy  as  Financing  Statement.    A  photocopy  or  other
                      ------------------------------
reproduction  of this  Agreement may be delivered by Pledgor or Secured Party to
any financial  intermediary or other third party for the purpose of transferring
or  perfecting  any or all of the  Pledged  Securities  to Secured  Party or its
designee or assignee.

         Section 7.04 Possession of Collateral. Secured Party shall be deemed to
                      ------------------------
have  possession of any  Collateral in transit to it or set apart for it (or, in
either case, any of its agents, affiliates or correspondents).

                                       11



         Section 7.05 Redelivery  of  Collateral.    If any sale or  transfer of
                      --------------------------
Collateral by Secured Party results in full satisfaction of the Obligations, and
after such sale or transfer and  discharge  there remains a surplus of proceeds,
Secured  Party will  deliver to Pledgor such excess  proceeds in a  commercially
reasonable  time;  provided,  however,  that  Secured  Party  shall not have any
liability  for any  interest,  cost or expense in  connection  with any delay in
delivering such proceeds to Pledgor.

         Section 7.06 Governing  Law;  Jurisdiction.    This  Agreement  and the
                      -----------------------------
security  interest  granted  hereby shall be construed  in  accordance  with and
governed  by the laws of the State of Texas  (except to the extent that the laws
of any other  jurisdiction  govern the  perfection  and priority of the security
interests granted hereby).

         Section 7.07 Continuing Security Agreement.
                      -----------------------------

                  (a) Except as otherwise provided by applicable law (including,
         without  limitation,  Section  9.620 of the Code),  no action  taken or
         omission  to  act  by  Secured  Party  hereunder,   including,  without
         limitation,  any exercise of voting or  consensual  rights  pursuant to
         Section 6.06 or any other action taken or inaction  pursuant to Section
         6.02,  shall be deemed to  constitute a retention of the  Collateral in
         satisfaction of the Obligations or otherwise to be in full satisfaction
         of the Obligations,  and the Obligations shall remain in full force and
         effect,  until  Secured Party shall have applied  payments  (including,
         without   limitation,   collections   from   Collateral)   towards  the
         Obligations  in  the  full  amount  then   outstanding  or  until  such
         subsequent time as is hereinafter provided in subsection (b) below.

                  (b) To the extent  that any  payments  on the  Obligations  or
         proceeds of the Collateral are subsequently invalidated, declared to be
         fraudulent  or  preferential,  set aside or  required to be repaid to a
         trustee,  debtor in  possession,  receiver  or other  Person  under any
         bankruptcy law, common law or equitable cause,  then to such extent the
         Obligations  so  satisfied  shall be revived  and  continue  as if such
         payment or proceeds had not been received by Secured Party, and Secured
         Party's security interests, rights, powers and remedies hereunder shall
         continue in full force and effect.  In such event, this Agreement shall
         be  automatically   reinstated  if  it  shall   theretofore  have  been
         terminated pursuant to Section 7.08.

         Section 7.08 Termination.  The grant of a security  interest  hereunder
                      -----------
and all of Secured Party's rights,  powers and remedies in connection  therewith
shall remain in full force and effect until Secured Party has (i)  retransferred
and delivered all Collateral in its  possession to Pledgor,  and (ii) executed a
written  release or  termination  statement and  reassigned  to Pledgor  without
recourse or warranty any remaining  Collateral and all rights  conveyed  hereby.
Upon (i) the complete payment of the Obligations (other than any indemnity which
is not yet due and payable),  (ii) the expiration of all outstanding  Letters of
Credit,  and (iii) the  termination of the  Commitments,  Secured Party,  at the
written request and expense of Pledgor, will release,  reassign and transfer the
Collateral  to Pledgor and declare this  Agreement to be of no further  force or
effect.  Notwithstanding  the  foregoing,  Section  4.04 and the  provisions  of
subsection 7.07(b) shall survive the termination of this Agreement.

                                       12



         Section 7.09 Counterparts;   Effectiveness.    This  Agreement  may  be
                      -----------------------------
executed in two or more  counterparts.  Each  counterpart is deemed an original,
but all such counterparts taken together constitute one and the same instrument.
This  Agreement  becomes  effective  upon the  execution  hereof by Pledgor  and
delivery of the same to Secured Party, and it is not necessary for Secured Party
to execute any acceptance  hereof or otherwise signify or express its acceptance
hereof.

         Section 7.10 Limitation  by Law.    All  rights,  remedies  and  powers
                      ------------------
provided in this Agreement may be exercised only to the extent that the exercise
thereof does not violate any applicable provision of law, and all the provisions
of this  Agreement  are  intended  to be  subject  to all  applicable  mandatory
provisions  of law which may be  controlling  and to be  limited  to the  extent
necessary so that they shall not render this Agreement  invalid,  unenforceable,
in whole or in part,  or not entitled to be recorded,  registered or filed under
the provisions of any applicable law.

         Section 7.11 Interest.   It is the  intention of the parties  hereto to
                      --------
conform  strictly  to usury  laws  applicable  to Secured  Party or any  Lender.
Accordingly,  if the  transactions  contemplated  hereby would be usurious under
applicable state or federal law, then,  notwithstanding anything to the contrary
in this  Agreement or in any other Loan Document,  it is agreed as follows:  (i)
the  aggregate  of  all  consideration  which  constitutes  interest  under  law
applicable  to  Secured  Party or any  Lender  that is  contracted  for,  taken,
reserved, charged or received under the Obligations, this Agreement or under any
other Loan Document or otherwise in connection with the Obligations  shall under
no circumstances  exceed the maximum amount allowed by such applicable law, (ii)
in the event that the maturity of the Obligations is accelerated for any reason,
or in the event of any required or permitted prepayment, then such consideration
that  constitutes  interest  under law applicable to Secured Party or any Lender
may never include more than such maximum amount,  and (iii) excess interest,  if
any, provided for in this Agreement,  any other Loan Document or otherwise shall
be  cancelled  automatically  and,  if  theretofore  paid,  shall be credited by
Secured Party on the principal amount of the Obligations (or, to the extent that
the principal amount of the Obligations shall have been or would thereby be paid
in full,  refunded by Secured  Party to Pledgor).  The right to  accelerate  the
maturity  of the  Obligations  does not  include  the  right to  accelerate  any
interest which has not otherwise accrued on the date of such  acceleration,  and
neither Secured Party nor any Lender intend to collect any unearned  interest in
the event of  acceleration.  All sums paid or agreed to be paid to Secured Party
or any Lender for the use,  forbearance  or  detention  of sums  included in the
initial  Obligations  shall,  to the extent  permitted  by  applicable  law,  be
amortized,  prorated,  allocated  and  spread  throughout  the full  term of the
Obligations  until  payment  in full so that the rate or amount of  interest  on
account of the initial Obligations does not exceed the applicable usury ceiling,
if any.

                         [Signatures begin on next page]

                                       13





PLEDGOR:                ST. MARY LAND & EXPLORATION COMPANY
- -------


                        By:    /S/ DAVID W. HONEYFIELD
                               -----------------------
                               David W. Honeyfield
                               Vice President - Finance, Secretary and Treasurer


SECURED PARTY:          WACHOVIA BANK, NATIONAL ASSOCIATION, as
- -------------           Administrative Agent


                        By:    /S/ PHILIP J. TRINDER
                               ---------------------
                        Name:  Philip J. Trinder
                        Title: Vice President



                                       14



                                    EXHIBIT A

                               PLEDGED SECURITIES
                               ------------------


1.       St. Mary Energy Company, a Delaware  corporation ("SMEC") -- 100 shares
                                                            ----
         of the common  stock of SMEC,  registered  in the name of St. Mary Land
         &  Exploration  Company  ("Pledgor")  on  the  books  of  SMEC,  as
                                        -------
         represented by Certificate No. 001.

2.       Nance Petroleum Corporation, a Montana corporation ("Nance") -
                                                              -----

         a.       20,000 shares of the common stock of Nance,  registered in the
                  name of  Pledgor  on the books of  Nance,  as  represented  by
                  Certificate No. 034.

         b.       5,000 shares of the common stock of Nance,  registered  in the
                  name of  Pledgor  on the books of  Nance,  as  represented  by
                  Certificate No. 015.

EX-10

                                                                    EXHIBIT 10.6

- --------------------------------------------------------------------------------







               AMENDED AND RESTATED PLEDGE AND SECURITY AGREEMENT
               --------------------------------------------------



                                     Between

                          NANCE PETROLEUM CORPORATION,
                                   as Pledgor



                                       and



          WACHOVIA BANK, NATIONAL ASSOCIATION, as Administrative Agent,
                                as Secured Party



                          Effective as of April 7, 2005








- --------------------------------------------------------------------------------






               AMENDED AND RESTATED PLEDGE AND SECURITY AGREEMENT
               --------------------------------------------------


         THIS  AMENDED  AND  RESTATED  PLEDGE  AND  SECURITY  AGREEMENT  is made
effective  as of April  7,  2005,  by NANCE  PETROLEUM  CORPORATION,  a  Montana
corporation with principal offices at 550 N. 31st Street,  Suite 500,  Billings,
Montana 59103-7168 ("Pledgor"), in favor of WACHOVIA BANK, NATIONAL ASSOCIATION,
                     -------
a  national  banking  association  with  offices  at 301 South  College  Street,
Charlotte,  North Carolina 28288, as Administrative Agent (in such capacity, the
"Secured Party") for the benefit of the several lenders now or hereafter parties
 -------------
to the  hereinafter  defined  Credit  Agreement  (individually,  a "Lender"  and
                                                                    ------
collectively, the "Lenders").
                   -------

                                    RECITALS
                                    --------


         A. Pursuant to that certain  Credit  Agreement  dated as of January 27,
2003, among St. Mary Land & Exploration Company, a Delaware corporation (the
"Borrower"),  Secured  Party  and  the  lenders  party  thereto  (the  "Existing
 --------                                                               --------
Lenders") (such Credit  Agreement,  as amended and  supplemented,  the "Existing
- -------                                                                 --------
Credit  Agreement"),  Pledgor  received  certain loans and  extensions of credit
- -----------------
under a revolving  credit  facility made available to Pledgor under the Existing
Credit Agreement, up to the aggregate principal amount of $300,000,000.

         B.  The  Existing  Lenders  conditioned  their  obligations  under  the
Existing  Credit  Agreement  upon the  execution and delivery by Pledgor of that
certain  Pledge  and  Security  Agreement  dated as of  January  27,  2003  (the
"Existing Pledge and Security Agreement").
 --------------------------------------

         C. The  Borrower,  Secured  Party  and the  Lenders  have  amended  and
restated the Existing Credit Agreement by entering into that certain Amended and
Restated Credit Agreement dated of even date herewith (as amended,  supplemented
or otherwise  modified from time to time, the "Credit  Agreement")  "), whereby,
                                               -----------------
pursuant to which,  the Lenders have agreed to make certain  loans to and extend
certain credit for the account of the Borrower  subject to the  limitations  set
forth in the Credit Agreement. The initial loans under the Credit Agreement have
been used by the  Borrower  to renew,  rearrange,  modify and extend all amounts
outstanding under the Existing Credit Agreement.

         D.  Pursuant to that certain  Amended and Restated  Guaranty  Agreement
dated of even date herewith, from Pledgor in favor of Secured Party (as amended,
supplemented  or other  modified from time to time,  the "Guaranty  Agreement"),
                                                          -------------------
Pledgor has unconditionally guaranteed the prompt payment and performance of all
indebtedness,  obligations  and  liabilities  of the Borrower to the Lenders and
secured Party under or in connection with the Credit Agreement.

         E. The Secured Party and the Lenders have conditioned their obligations
under the Credit  Agreement  upon the  execution and delivery by Pledgor of this
Amended and Restated  Pledge and Security  Agreement,  and Pledgor has agreed to
execute and deliver this Amended and Restated Pledge and Security Agreement.

         NOW, THEREFORE, (i) in order to comply with the terms and conditions of
the Credit  Agreement,  (ii) to induce the Lenders,  at any time or from time to
time, to loan monies and extend credit, with or without security,  to or for the
account of Borrower in accordance with the terms of the Credit Agreement,  (iii)

                                       1



at the special  insistence  and request of the Lenders,  and (iv) for other good
and  valuable  consideration,  the  receipt and  sufficiency  of which is hereby
acknowledged,  Pledgor and Secured  Party hereby agree that the Existing  Pledge
and Security Agreement is hereby amended and restated in its entirety to read as
follows:

                                   ARTICLE 1

                                SECURITY INTEREST
                                -----------------

         Section 1.01 Pledge.   Pledgor  hereby  pledges,  assigns and grants to
                      ------
Secured  Party a security  interest  in and right of set-off  against the assets
referred to in Section 1.02 (the  "Collateral") to secure the prompt payment and
                                   ----------
performance  of  the   "Obligations"  (as  defined  in  Section  2.02)  and  the
                        -----------
performance  by  Pledgor  of this  Amended  and  Restated  Pledge  and  Security
Agreement.

         Section 1.02 Collateral. The Collateral consists of the following types
                      ----------
or items of property which are owned by Pledgor:

                  (a) The  securities  described  or  referred  to in  Exhibit A
         attached hereto and made a part hereof.

                  (b) (i) The certificates or instruments,  if any, representing
         such  membership  interests and such units,  (ii) all dividends  (cash,
         stock or otherwise), cash, instruments,  rights to subscribe,  purchase
         or sell and all other rights and property  from time to time  received,
         receivable  or otherwise  distributed  in respect of or in exchange for
         any or all of such  membership  interests  or  such  units,  (iii)  all
         replacements and  substitutions  for any of the property referred to in
         this Section 1.02, including, without limitation,  claims against third
         parties, and (iv) the proceeds,  interest,  profits and other income of
         or on any of the property referred to in this Section 1.02.

It is expressly  contemplated  that additional  securities or other property may
from time to time be pledged, assigned or granted to Secured Party as additional
security for the Obligations,  and the term "Collateral" as used herein shall be
                                             ----------
deemed  for all  purposes  hereof  to  include  all such  additional  membership
interests,  units and property,  together  with all other  property of the types
described above related thereto.

         Section 1.03 Transfer of Collateral.  All  certificates  or instruments
                      ----------------------
representing or evidencing the Pledged Securities shall be delivered to and held
pursuant  hereto by Secured  Party or a Person  designated  by Secured Party and
shall be in suitable form for transfer by delivery,  or shall be  accompanied by
duly executed instruments of transfer or assignment in blank, or (in the case of
either certificated or uncertificated  securities) Secured Party shall have been
provided with evidence that the Pledged Securities have been otherwise delivered
to Secured Party in accordance  with Section 8.301 of the Code,  all in form and
substance satisfactory to Secured Party. Notwithstanding the preceding sentence,
at Secured  Party's  discretion,  all Pledged  Securities  must be  delivered or
transferred in such manner as to permit  Secured Party to meet the  requirements
of  Section  8.303(a)(3)  of the Code to the  extent of its  security  interest.
Secured Party shall have the right,  at any time in its  discretion  and without
notice to Pledgor, to transfer to or to register in the name of Secured Party or

                                       2



any of its  nominees any or all of the Pledged  Securities,  subject only to the
revocable  rights  specified in Section 4.02.  In addition,  Secured Party shall
have the right at any time to exchange certificates or instruments  representing
or evidencing  Pledged  Securities for certificates or instruments of smaller or
larger denominations.

                                    ARTICLE 2

                                   DEFINITIONS
                                   -----------

         Section 2.01 Terms Defined Above.  As used in this Amended and Restated
                      -------------------
Pledge and Security  Agreement,  the terms defined above shall have the meanings
respectively assigned to them.

         Section 2.02 Certain Definitions.  As used in this Amended and Restated
                      -------------------
Pledge and Security  Agreement,  the  following  terms shall have the  following
meanings, unless the context otherwise requires:

                  "Agreement"   means  this  Amended  and  Restated  Pledge  and
                   ---------
         Security  Agreement,  as the  same may  from  time to time be  amended,
         supplemented or otherwise modified.

                  "Code"  means the  Uniform  Commercial  Code as  presently  in
                   ----
         effect in the State of Texas,  Articles 1 through 9.  Unless  otherwise
         indicated  by the context  herein,  all  uncapitalized  terms which are
         defined in the Code shall have  their  respective  meanings  as used in
         Articles 8 and 9 of the Code.

                  "Event of Default" means any event specified in Section 6.01.
                   ----------------

                  "Obligations"  means  the  collective  reference  to  (a)  all
                   -----------
         indebtedness,  obligations  and liabilities of the Borrower under or in
         connection with the Loan Documents,  including, without limitation, the
         unpaid  principal  of and interest on the Loans and the LC Exposure and
         all other  obligations  and  liabilities  of the  Borrower  (including,
         without  limitation,  interest  accruing  at the then  applicable  rate
         provided in the Credit  Agreement  after the  maturity of the Loans and
         the LC  Exposure  and  interest  accruing at the then  applicable  rate
         provided in the Credit  Agreement  after the filing of any  petition in
         bankruptcy,  or the commencement of any insolvency,  reorganization  or
         like proceeding,  relating to the Borrower,  whether or not a claim for
         post-filing or post-petition interest is allowed in such proceeding) to
         Secured  Party or any  Lender  (or,  in the case of any Swap  Agreement
         referred to below,  any  Affiliate  of any Lender),  whether  direct or
         indirect, absolute or contingent, due or to become due, or now existing
         or hereafter incurred,  which may arise under, out of, or in connection
         with,  the  Credit  Agreement,  the other  Loan  Documents  or any Swap
         Agreement  entered  into  by the  Borrower  with  any  Lender  (or  any
         Affiliate  of any Lender),  or any other  document  made,  delivered or
         given in  connection  therewith,  in each case  whether  on  account of
         principal,  interest,  reimbursement  obligations,  fees,  indemnities,
         costs,  expenses  or  otherwise  (including,  without  limitation,  all
         reasonable fees and disbursements of counsel to Secured Party or to the
         Lenders that are  required to be paid by the  Borrower  pursuant to the
         terms  of any of  the  foregoing  agreements),  (b)  all  indebtedness,
         obligations  and liabilities of Pledgor under or in connection with the
         Guaranty  Agreement and (c) all  obligations of Pledgor which may arise

                                       3



         under or in connection  with this  Agreement or any other Loan Document
         to which Pledgor is a party.

                  The  term   "Obligations"   shall   mean   all   indebtedness,
                               -----------
         obligations and liabilities described,  referred to or mentioned in the
         immediately  preceding paragraph of this definition,  and all renewals,
         rearrangements,  increases, substitutions,  replacements and extensions
         for any period thereof and  amendments,  supplements  or  modifications
         thereto, in whole or in part.

                  "Obligor"  means  any  Person,  other  than  Pledgor,   liable
                   -------
         (whether  directly or  indirectly,  primarily or  secondarily)  for the
         payment  or  performance  of any of the  Obligations  whether as maker,
         co-maker, endorser, guarantor,  accommodation party, general partner or
         otherwise.

                  "Pledged  Securities"  means all of the  securities  and other
                   -------------------
         property  (whether or not the same  constitutes a "security"  under the
         Code)  referred  to in Section  1.02(a) or 1.02(b)  and all  additional
         securities, if any, constituting Collateral under this Agreement.

         Section 2.03 Credit Agreement Terms.  Unless otherwise  defined herein,
                      ----------------------
terms beginning with a capital letter which are defined in the Credit  Agreement
shall have the same meanings herein as therein.

         Section 2.04 Section References.  Unless otherwise provided for herein,
                      ------------------
all references herein to Sections are to Sections of this Agreement.

                                   ARTICLE 3

                         REPRESENTATIONS AND WARRANTIES
                         ------------------------------

         In order to induce  Secured  Party to accept  this  Agreement,  Pledgor
represents and warrants to Secured Party (which  representations  and warranties
will survive the creation and payment of the Obligations) that:

         Section 3.01 Ownership of Collateral; Encumbrances. Except as otherwise
                      -------------------------------------
permitted by the Credit Agreement, Pledgor is the record and beneficial owner of
the  Collateral  free and clear of any Lien  except  for the  security  interest
created by this  Agreement,  and Pledgor has full right,  power and authority to
pledge, assign and grant a security interest in the Collateral to Secured Party.

         Section 3.02 No Required Consent. No authorization,  consent,  approval
                      -------------------
or other action by, and no notice to or filing with, any governmental  authority
or  regulatory  body (other than the filing of financing  statements in favor of
Secured Party) is required for (i) the due execution,  delivery and  performance
by Pledgor of this Agreement, (ii) the grant by Pledgor of the security interest
granted by this Agreement or (iii) the perfection of such security interest.

                                       4




         Section 3.03 Pledged Securities.  The Pledged Securities have been duly
                      ------------------
authorized and validly issued, and are fully paid and non-assessable.

         Section 3.04 First Priority  Security  Interest.  The pledge of Pledged
                      ----------------------------------
Securities  pursuant to this  Agreement,  the  delivery to Secured  Party of the
certificates  representing  the Pledged  Securities  accompanied by stock powers
duly executed in blank and the filing of appropriate financing statements in the
relevant locations create a valid and perfected first priority security interest
in the  Collateral,  enforceable  against  Pledgor  and all  third  parties  and
securing payment of the Obligations.

                                   ARTICLE 4

                            COVENANTS AND AGREEMENTS
                            ------------------------

         Pledgor  will at all times  comply with the  covenants  and  agreements
contained in this Article 4, from the date hereof and for so long as any part of
the Obligations  (other than any indemnity which is not yet due and payable) are
outstanding.

         Section 4.01 Sale, Disposition or Encumbrance of Collateral.  Except as
                      ----------------------------------------------
otherwise not prohibited by the Credit Agreement or this Agreement, Pledgor will
not in any way  encumber any of the  Collateral  (or permit or suffer any of the
Collateral to be encumbered) or sell, pledge,  assign, lend or otherwise dispose
of or transfer  any of the  Collateral  to or in favor of any Person  other than
Secured Party.

         Section 4.02 Voting Rights; Dividends or Distributions.  Until both (i)
                      -----------------------------------------
an Event of Default shall have  occurred and be  continuing  and (ii) either (a)
the Loans have become due and payable at their stated maturity and have not been
paid, (b) the Loans have been declared due and payable  pursuant to Article X of
the  Credit  Agreement,  or (c)  Secured  Party has given  notice to  Pledgor of
Secured Party's intent to exercise its rights under Section 6.02:

                  (a) Pledgor  shall be entitled to exercise any and all voting,
         management  and/or  other  consensual  rights and powers  inuring to an
         owner  of the  Collateral  or any  part  thereof  for any  purpose  not
         inconsistent  with  the  terms of this  Agreement  and the  other  Loan
         Documents.

                  (b) Pledgor  shall be entitled to receive and retain (free and
         clear of and no longer  subject to this  Agreement  or the Lien created
         pursuant to this  Agreement) any and all dividends,  distributions  and
         interest paid in respect of the Collateral, provided, however, that any
                                                     --------  -------
         and all

                           (i) dividends and interest paid or payable other than
                  in cash in respect  of,  and  instruments  and other  property
                  received,  receivable or otherwise  distributed in respect of,
                  or  in  exchange  for  (including,   without  limitation,  any
                  certificate,  share or  interest  purchased  or  exchanged  in
                  connection  with a tender  offer  or  merger  agreement),  any
                  Collateral,

                           (ii)  dividends  and  other   distributions  paid  or

                                       5



                  payable  in cash in respect of any  Collateral  in  connection
                  with  a  partial  or  total  liquidation  or  dissolution,  or
                  reclassification, and

                           (iii) cash paid, payable or otherwise  distributed in
                  respect of principal of, or in  redemption  of, or in exchange
                  for, any Collateral,

shall  be,  and  shall  be  promptly  delivered  to  Secured  Party  to hold as,
Collateral  and shall,  if  received  by  Pledgor,  be received in trust for the
benefit of Secured  Party,  be  segregated  from the other  property or funds of
Pledgor,  and be promptly  delivered to Secured  Party as Collateral in the same
form as so  received  (with any  necessary  endorsement)  ),  provided  further,
                                                              --------  -------
however,  in no event shall the foregoing  proviso be applicable  to, or prevent
- -------
the Pledgor from receiving and retaining any securities  that are not pledged or
intended or required to be pledged to the Secured Party pursuant to any Security
Instrument, including this Agreement.

         Section 4.03 Records and  Information.  Pledgor shall keep accurate and
                      ------------------------
complete records of the Collateral (including proceeds, payments, distributions,
income and profits).  Pledgor will promptly  provide  written  notice to Secured
Party of all  information  which in any way affects the filing of any  financing
statement or other public notices or recordings  pertaining to the perfection of
a security  interest in the Collateral,  or the delivery and possession of items
of  Collateral  for  the  purpose  of  perfecting  a  security  interest  in the
Collateral.

         Section 4.04 Certain Liabilities.  Pledgor hereby assumes all liability
                      -------------------
for the  Collateral,  the  security  interest  created  hereunder  and any  use,
possession, maintenance,  management, enforcement or collection of any or all of
the Collateral.

         Section 4.05 Further  Assurances.   Upon the request of Secured  Party,
                      -------------------
Pledgor shall (at Pledgor's  expense) execute and deliver all such  assignments,
certificates,  instruments,  securities, financing statements,  notifications to
financial intermediaries,  clearing corporations, issuers of securities or other
third parties or other  documents and give further  assurances  and do all other
acts and  things as Secured  Party may  reasonably  request  to perfect  Secured
Party's  interest in the Collateral or to protect,  enforce or otherwise  effect
Secured Party's rights and remedies hereunder.

         Section 4.06 Rights to Sell.    If Secured  Party  shall  determine  to
                      --------------
exercise its rights to sell all or any of the Collateral  pursuant to its rights
hereunder,  Pledgor agrees that, upon request of Secured Party, Pledgor will, at
its own expense:

                  (a) execute and  deliver,  and use all  reasonable  efforts to
         cause each  issuer of the  Collateral  contemplated  to be sold and the
         directors  and  officers  thereof  to  execute  and  deliver,  all such
         instruments  and  documents,  and do or cause to be done all such other
         acts and things,  as may be necessary or, in the reasonable  opinion of
         Secured  Party,   advisable  to  register  such  Collateral  under  the
         provisions of the  Securities Act of 1933, as from time to time amended
         (the  "Securities  Act"),  if such  registration  is, in the reasonable
         opinion of Secured  Party,  necessary  or  advisable to effect a public
         distribution of the Collateral, and to cause the registration statement
         relating  thereto to become  effective and to remain effective for such
         period as prospectuses are required by law to be furnished, and to make
         all amendments and  supplements  thereto and to the related  prospectus
         which,  in the reasonable  opinion of Secured  Party,  are necessary or

                                       6



         advisable,  all in conformity  with the  requirements of the Securities
         Act and the  rules  and  regulations  of the  Securities  and  Exchange
         Commission applicable thereto;

                  (b) use all reasonable efforts to qualify the Collateral under
         the state  securities  or "Blue Sky" laws and to obtain  all  necessary
         governmental approvals for the sale of the Collateral,  as requested by
         Secured Party;

                  (c) use all  reasonable  efforts to cause each such  issuer to
         make  available to its security  holders,  as soon as  practicable,  an
         earnings  statement  which will satisfy the provisions of Section 11(a)
         of the Securities Act; and

                  (d) use all  reasonable  efforts to do or cause to be done all
         such  others acts and things as may be  necessary  to make such sale of
         the  Collateral or any part thereof valid and binding and in compliance
         with applicable law.

Pledgor further  acknowledges  the  impossibility  of ascertaining the amount of
damages  which would be  suffered  by Secured  Party by reason of the failure by
Pledgor to perform  any of the  covenants  contained  in this  Section  4.06 and
consequently agrees that if Pledgor shall fail to perform any of such covenants,
it shall pay (to the extent permitted by law), as liquidated damages, and not as
penalty,  an  amount  (in no event to exceed  the  amount  of  Obligations  then
outstanding) equal to the value of the Collateral  affected by Pledgor's failure
to perform any of the  covenants  contained in this Section 4.06 on the date the
Secured Party shall demand compliance with this Section 4.06.

                                   ARTICLE 5

                   RIGHTS, DUTIES AND POWERS OF SECURED PARTY
                   ------------------------------------------

         The following rights, duties and powers of Secured Party are applicable
irrespective of whether an Event of Default occurs and is continuing:

         Section 5.01 Discharge Encumbrances.  Secured Party may, at its option,
                      ----------------------
three (3) Business Days after  receipt by Pledgor of prior  written  notice from
Secured Party of its intent to do so,  discharge any Liens at any time levied or
placed on the Collateral  that are  prohibited by the Credit  Agreement and that
are not being contested in good faith by appropriate proceedings. Pledgor agrees
to reimburse  Secured Party within five (5) days after demand for any payment so
made, plus interest  thereon from the date of Secured Party's demand at the rate
per  annum  equal to 2% plus the rate  applicable  to ABR Loans as  provided  in
Section 3.02(a) of the Credit Agreement.

         Section 5.02 Transfer of Collateral. Subject to the terms of the Credit
                      ----------------------
Agreement,  Secured Party may transfer any or all of the  Obligations,  and upon
any such  transfer  Secured Party may transfer its interest in any or all of the
Collateral and shall be fully discharged thereafter from all liability therefor.
Any transferee of the Collateral shall be vested with all rights, powers, duties
and remedies of Secured Party hereunder.

         Section 5.03 Cumulative  and Other  Rights.    The  rights,  powers and
                      -----------------------------

                                       7



remedies of Secured Party  hereunder  are in addition to all rights,  powers and
remedies given by law or in equity.  The exercise by Secured Party of any one or
more of the rights,  powers and  remedies  herein  shall not be  construed  as a
waiver of any other rights, powers and remedies,  including, without limitation,
any other rights of set-off.

         Section 5.04 Disclaimer of Certain Duties.   The powers  conferred upon
                      ----------------------------
Secured Party by this  Agreement  are to protect its interest in the  Collateral
and shall not impose any duty upon  Secured  Party to exercise  any such powers.
Pledgor  hereby agrees that Secured Party shall not be liable for, nor shall the
indebtedness  evidenced by the  Obligations be diminished  by,  Secured  Party's
delay or  failure  to collect  upon,  foreclose,  sell,  take  possession  of or
otherwise obtain value for the Collateral.

         Section 5.05 Custody and Preservation of the Collateral.  Secured Party
                      ------------------------------------------
shall  be  deemed  to  have  exercised   reasonable  care  in  the  custody  and
preservation  of the  Collateral in its possession if the Collateral is accorded
treatment  substantially  equal to that which comparable  secured parties accord
comparable  collateral,  it being understood and agreed,  however,  that Secured
Party shall not have  responsibility  for (i) ascertaining or taking action with
respect to calls, conversions,  exchanges,  maturities, tenders or other matters
relative to any  Collateral,  whether or not  Secured  Party has or is deemed to
have knowledge of such matters,  or (ii) taking any necessary  steps to preserve
rights against Persons or entities with respect to any Collateral.

                                   ARTICLE 6

                                EVENTS OF DEFAULT
                                -----------------

         Section 6.01 Events.    An "Event of Default" (as defined in the Credit
                      ------
Agreement)  which has occurred and is  continuing  shall  constitute an Event of
Default under this Agreement.

         Section 6.02 Remedies.  Upon the occurrence and during the  continuance
                      --------
of any Event of  Default,  Secured  Party  may take any or all of the  following
actions  without notice or demand to Pledgor (except that Secured Party will not
take any  action  in the case of  paragraphs  (b) and (f) below  until  five (5)
Business Days after  receipt by Pledgor of written  notice from Secured Party of
its intent to do so):

                  (a) Subject to applicable  provisions  contained in the Credit
         Agreement,  declare  all or part of the  indebtedness  pursuant  to the
         Obligations immediately due and payable and enforce payment of the same
         by Pledgor or any Obligor.

                  (b) Sell, in one or more sales and in one or more parcels,  or
         otherwise  dispose of any or all of the Collateral in any  commercially
         reasonable  manner as Secured  Party may elect,  in a public or private
         transaction,  at any  location as deemed  reasonable  by Secured  Party
         either  for cash or  credit or for  future  delivery  at such  price as
         Secured Party may reasonably  deem fair, and (unless  prohibited by the
         Uniform  Commercial  Code, as adopted in any  applicable  jurisdiction)
         Secured Party may be the purchaser of any or all Collateral so sold and
         may apply upon the  purchase  price  therefor any  Obligations  secured
         hereby.  Any such sale or transfer by Secured Party either to itself or

                                       8



         to any other Person shall be absolutely free from any claim of right by
         Pledgor, including any equity or right of redemption, stay or appraisal
         which  Pledgor  has or may have  under any rule of law,  regulation  or
         statute  now  existing  or  hereafter  adopted.  Upon any such  sale or
         transfer,  Secured  Party shall have the right to  deliver,  assign and
         transfer to the purchaser or transferee  thereof the Collateral so sold
         or transferred.  If Secured Party  reasonably  deems it advisable to do
         so, it may  restrict  the  bidders  or  purchasers  of any such sale or
         transfer to Persons or entities who will  represent and agree that they
         are  purchasing  the  Collateral for their own account and not with the
         view to the  distribution or resale of any of the  Collateral.  Secured
         Party may, at its  discretion,  provide for a public sale, and any such
         public  sale  shall  be held at such  time  or  times  within  ordinary
         business  hours and at such place or places as Secured Party may fix in
         the notice of such sale.  Secured  Party shall not be obligated to make
         any sale pursuant to any such notice. Secured Party may, without notice
         or  publication,  adjourn any public or private sale by announcement at
         any time and place  fixed for such  sale,  and such sale may be made at
         any time or place to which the same may be so  adjourned.  In the event
         any sale or transfer  hereunder is not completed or is defective in the
         opinion of Secured  Party,  such sale or transfer shall not exhaust the
         rights of Secured  Party  hereunder,  and Secured  Party shall have the
         right to cause one or more  subsequent  sales or  transfers  to be made
         hereunder.  If only part of the Collateral is sold or transferred  such
         that the Obligations remain outstanding (in whole or in part),  Secured
         Party's rights and remedies hereunder shall not be exhausted, waived or
         modified,  and Secured Party is  specifically  empowered to make one or
         more successive  sales or transfers  until all the Collateral  shall be
         sold or transferred and all the Obligations are paid. In the event that
         Secured Party elects not to sell the Collateral,  Secured Party retains
         its rights to dispose of or utilize the Collateral or any part or parts
         thereof in any manner authorized or permitted by law or in equity,  and
         to apply the proceeds of the same towards payment of the Obligations.

                  (c) Apply proceeds of the disposition of the Collateral to the
         Obligations in any manner elected by Secured Party and permitted by the
         Code or otherwise  permitted by law or in equity.  Such application may
         include,  without limitation,  the reasonable attorneys' fees and legal
         expenses incurred by Secured Party.

                  (d)  Appoint  any Person as agent to  perform  any act or acts
         necessary  or incident to any sale or transfer by Secured  Party of the
         Collateral.

                  (e) Receive, change the address for delivery, open and dispose
         of mail  addressed  to  Pledgor,  and to  execute,  assign and  endorse
         negotiable and other instruments for the payment of money, documents of
         title or other  evidences of payment,  shipment or storage for any form
         of Collateral on behalf of and in the name of Pledgor.

                  (f) Exercise all other rights and remedies permitted by law or
         in equity.

         Section 6.03 Attorney-in-Fact.   Pledgor  hereby  irrevocably  appoints
                      ----------------
Secured Party as Pledgor's  attorney-in-fact,  with full  authority in the place
and stead of Pledgor and in the name of Pledgor or otherwise,  from time to time
in Secured Party's  discretion upon the occurrence and during the continuance of
an Event of Default, but at Pledgor's cost and expense,  three (3) Business Days

                                       9



after  receipt by Pledgor of written  notice from Secured Party of its intent to
do so, to take any action and to execute any assignment,  certificate, financing
statement, stock power, notification, document or instrument which Secured Party
may deem  necessary or advisable to accomplish  the purposes of this  Agreement,
including,  without limitation,  to receive, endorse and collect all instruments
made payable to Pledgor  representing  any dividend,  interest  payment or other
distribution  in respect of the  Collateral or any part thereof and to give full
discharge for the same.

         Section 6.04 Liability for Deficiency. If any sale or other disposition
                      ------------------------
of  Collateral  by  Secured  Party in  compliance  with the Loan  Documents  and
applicable law or any other action of Secured Party hereunder in compliance with
the Loan Documents and  applicable law results in reduction of the  Obligations,
such action will not release Pledgor from its liability to Secured Party for any
unpaid  Obligations,  including (to the extent permitted by law) costs,  charges
and expenses  incurred in the liquidation of Collateral,  together with interest
thereon until paid at the rate per annum equal to 2% plus the rate applicable to
ABR Loans as provided in Section 3.02(a) of the Credit  Agreement,  and the same
shall be immediately due and payable to Secured Party at Secured Party's address
set forth in the opening  paragraph hereof.

         Section 6.05 Reasonable Notice. If any applicable  provision of any law
                      -----------------
requires  Secured Party to give reasonable  notice of any sale or disposition or
other action,  Pledgor  hereby agrees that ten days' prior written  notice shall
constitute  reasonable notice thereof.  Such notice, in the case of public sale,
shall  state the time and place  fixed for such sale and, in the case of private
sale, the time after which such sale is to be made.

         Section 6.06 Pledged  Securities.    Upon both (i) the  occurrence  and
                      -------------------
during  the  continuance  of an Event of Default  and (ii)  either (a) the Loans
becoming  due and payable at their stated  maturity and not paid,  (b) the Loans
being declared due and payable pursuant to Article X of the Credit Agreement, or
(c) Secured  Party giving  prior  written  notice to Pledgor of Secured  Party's
intent to exercise its rights under Section 6.02:

                  (a) All  rights  of  Pledgor  to  receive  the  dividends  and
         interest payments which it would otherwise be authorized to receive and
         retain pursuant to Section 4.02 shall cease,  and all such rights shall
         thereupon  become vested in Secured Party who shall  thereupon have the
         sole  right  to  receive  and hold as  Collateral  such  dividends  and
         interest payments,  but Secured Party shall have no duty to receive and
         hold such dividends and interest  payments and shall not be responsible
         for any failure to do so or delay in so doing.

                  (b) All dividends and interest  payments which are received by
         Pledgor  contrary  to the  provisions  of this  Section  6.06  shall be
         received in trust for the benefit of Secured Party, shall be segregated
         from other funds of Pledgor and shall be promptly  paid over to Secured
         Party as Collateral in the same form as so received (with any necessary
         endorsement).

                  (c)  Secured   Party  may  exercise  any  and  all  rights  of
         conversion,  exchange,  subscription or any other rights, privileges or
         options  pertaining to any of the Pledged  Securities as if it were the
         absolute  owner thereof,  including  without  limitation,  the right to
         exchange at its discretion,  any and all of the Pledged Securities upon
         the merger,  consolidation,  reorganization,  recapitalization or other
         readjustment  of any  issuer  of such  Pledged  Securities  or upon the

                                       10



         exercise by any such issuer or Secured Party of any right, privilege or
         option  pertaining to any of the Pledged  Securities  and in connection
         therewith, to deposit and deliver any and all of the Pledged Securities
         with any  committee,  depository,  transfer  agent,  registrar or other
         designated  agency upon such terms and  conditions as it may determine,
         all without  liability except to account for property actually received
         by it, but  Secured  Party  shall have no duty to  exercise  any of the
         aforesaid  rights,  privileges or options and shall not be  responsible
         for any failure to do so or delay in so doing.

         Section 6.07 Non-judicial Enforcement.  To the extent permitted by law,
                      ------------------------
Secured Party may enforce its rights hereunder without prior judicial process or
judicial  hearing,  and to the extent permitted by law Pledgor  expressly waives
any and all legal rights which might otherwise  require Secured Party to enforce
its rights by judicial process.

                                   ARTICLE 7

                            MISCELLANEOUS PROVISIONS
                            ------------------------

         Section 7.01 Notices.    Any notice  required or  permitted to be given
                      -------
under or in  connection  with this  Agreement  shall be in writing  and shall be
mailed  by first  class or  express  mail,  postage  prepaid,  or sent by telex,
telegram,  telecopy  or other  similar  form of rapid  written  transmission  or
personally  delivered to the receiving party. All such  communications  shall be
mailed, sent or delivered at the address  respectively  indicated in the opening
paragraph hereof or at such other address as either party may have furnished the
other party in writing.  Any  communication  so  addressed  and mailed  shall be
deemed  to  be  given  upon  receipt,  any  notice  so  sent  by  rapid  written
transmission  shall be deemed to be given when receipt of such  transmission  is
acknowledged by the receiving  operator or equipment,  and any  communication so
delivered in person shall be deemed to be given when  receipted  for or actually
received by Pledgor or Secured Party, as the case may be.

         Section 7.02 Amendments  and Waivers.   Secured  Party's  acceptance of
                      -----------------------
partial or delinquent  payments or any forbearance,  failure or delay by Secured
Party in exercising any right,  power or remedy  hereunder shall not be deemed a
waiver of any  obligation of Pledgor or any Obligor,  or of any right,  power or
remedy of Secured Party; and no partial  exercise of any right,  power or remedy
shall preclude any other or further exercise  thereof.  Secured Party may remedy
any Event of Default  hereunder or in connection  with the  Obligations  without
waiving the Event of Default so remedied.  Pledgor hereby agrees that if Secured
Party  agrees to a waiver  of any  provision  hereunder,  or an  exchange  of or
release of the  Collateral,  or the  addition or release of any Obligor or other
Person,  any such action shall not constitute a waiver of any of Secured Party's
other  rights or of  Pledgor's  obligations  hereunder.  This  Agreement  may be
amended only by an instrument in writing executed jointly by Pledgor and Secured
Party and may be supplemented only by documents  delivered or to be delivered in
accordance with the express terms hereof.

         Section 7.03 Copy  as  Financing  Statement.    A  photocopy  or  other
                      ------------------------------
reproduction  of this  Agreement may be delivered by Pledgor or Secured Party to
any financial  intermediary or other third party for the purpose of transferring
or  perfecting  any or all of the  Pledged  Securities  to Secured  Party or its
designee or assignee.

                                       11



         Section 7.04 Possession of Collateral. Secured Party shall be deemed to
                      ------------------------
have  possession of any  Collateral in transit to it or set apart for it (or, in
either case, any of its agents, affiliates or correspondents).

         Section 7.05 Redelivery  of  Collateral.    If any sale or  transfer of
                      --------------------------
Collateral by Secured Party results in full satisfaction of the Obligations, and
after such sale or transfer and  discharge  there remains a surplus of proceeds,
Secured  Party will  deliver to Pledgor such excess  proceeds in a  commercially
reasonable  time;  provided,  however,  that  Secured  Party  shall not have any
liability  for any  interest,  cost or expense in  connection  with any delay in
delivering such proceeds to Pledgor.

         Section 7.06 Governing  Law;  Jurisdiction.    This  Agreement  and the
                      -----------------------------
security  interest  granted  hereby shall be construed  in  accordance  with and
governed  by the laws of the State of Texas  (except to the extent that the laws
of any other  jurisdiction  govern the  perfection  and priority of the security
interests granted hereby).

         Section 7.07 Continuing Security Agreement.
                      -----------------------------

                  (a) Except as otherwise provided by applicable law (including,
         without  limitation,  Section  9.620 of the Code),  no action  taken or
         omission  to  act  by  Secured  Party  hereunder,   including,  without
         limitation,  any exercise of voting or  consensual  rights  pursuant to
         Section 6.06 or any other action taken or inaction  pursuant to Section
         6.02,  shall be deemed to  constitute a retention of the  Collateral in
         satisfaction of the Obligations or otherwise to be in full satisfaction
         of the Obligations,  and the Obligations shall remain in full force and
         effect,  until  Secured Party shall have applied  payments  (including,
         without   limitation,   collections   from   Collateral)   towards  the
         Obligations  in  the  full  amount  then   outstanding  or  until  such
         subsequent time as is hereinafter provided in subsection (b) below.

                  (b) To the extent  that any  payments  on the  Obligations  or
         proceeds of the Collateral are subsequently invalidated, declared to be
         fraudulent  or  preferential,  set aside or  required to be repaid to a
         trustee,  debtor in  possession,  receiver  or other  Person  under any
         bankruptcy law, common law or equitable cause,  then to such extent the
         Obligations  so  satisfied  shall be revived  and  continue  as if such
         payment or proceeds had not been received by Secured Party, and Secured
         Party's security interests, rights, powers and remedies hereunder shall
         continue in full force and effect.  In such event, this Agreement shall
         be  automatically   reinstated  if  it  shall   theretofore  have  been
         terminated pursuant to Section 7.08.

         Section 7.08 Termination.  The grant of a security  interest  hereunder
                      -----------
and all of Secured Party's rights,  powers and remedies in connection  therewith
shall remain in full force and effect until Secured Party has (i)  retransferred
and delivered all Collateral in its  possession to Pledgor,  and (ii) executed a
written  release or  termination  statement and  reassigned  to Pledgor  without
recourse or warranty any remaining  Collateral and all rights  conveyed  hereby.
Upon (i) the complete payment of the Obligations (other than any indemnity which
is not yet due and payable),  (ii) the expiration of all outstanding  Letters of
Credit,  and (iii) the  termination of the  Commitments,  Secured Party,  at the
written request and expense of Pledgor, will release,  reassign and transfer the
Collateral  to Pledgor and declare this  Agreement to be of no further  force or

                                       12



effect.  Notwithstanding  the  foregoing,  Section  4.04 and the  provisions  of
subsection 7.07(b) shall survive the termination of this Agreement.

         Section 7.09 Counterparts;   Effectiveness.    This  Agreement  may  be
                      -----------------------------
executed in two or more  counterparts.  Each  counterpart is deemed an original,
but all such counterparts taken together constitute one and the same instrument.
This  Agreement  becomes  effective  upon the  execution  hereof by Pledgor  and
delivery of the same to Secured Party, and it is not necessary for Secured Party
to execute any acceptance  hereof or otherwise signify or express its acceptance
hereof.

         Section 7.10 Limitation  by Law.    All  rights,  remedies  and  powers
                      ------------------
provided in this Agreement may be exercised only to the extent that the exercise
thereof does not violate any applicable provision of law, and all the provisions
of this  Agreement  are  intended  to be  subject  to all  applicable  mandatory
provisions  of law which may be  controlling  and to be  limited  to the  extent
necessary so that they shall not render this Agreement  invalid,  unenforceable,
in whole or in part,  or not entitled to be recorded,  registered or filed under
the provisions of any applicable law.

         Section 7.11 Interest.   It is the  intention of the parties  hereto to
                      --------
conform  strictly  to usury  laws  applicable  to Secured  Party or any  Lender.
Accordingly,  if the  transactions  contemplated  hereby would be usurious under
applicable state or federal law, then,  notwithstanding anything to the contrary
in this  Agreement or in any other Loan Document,  it is agreed as follows:  (i)
the  aggregate  of  all  consideration  which  constitutes  interest  under  law
applicable  to  Secured  Party or any  Lender  that is  contracted  for,  taken,
reserved, charged or received under the Obligations, this Agreement or under any
other Loan Document or otherwise in connection with the Obligations  shall under
no circumstances  exceed the maximum amount allowed by such applicable law, (ii)
in the event that the maturity of the Obligations is accelerated for any reason,
or in the event of any required or permitted prepayment, then such consideration
that  constitutes  interest  under law applicable to Secured Party or any Lender
may never include more than such maximum amount,  and (iii) excess interest,  if
any, provided for in this Agreement,  any other Loan Document or otherwise shall
be  cancelled  automatically  and,  if  theretofore  paid,  shall be credited by
Secured Party on the principal amount of the Obligations (or, to the extent that
the principal amount of the Obligations shall have been or would thereby be paid
in  full,  refunded  by  Secured  Party  to  Pledgor,  or  to  the  Company,  as
appropriate).  The right to accelerate the maturity of the Obligations  does not
include the right to accelerate any interest which has not otherwise  accrued on
the date of such  acceleration,  and neither Secured Party nor any Lender intend
to collect any unearned interest in the event of acceleration.  All sums paid or
agreed to be paid to Secured  Party or any Lender  for the use,  forbearance  or
detention  of sums  included in the  initial  Obligations  shall,  to the extent
permitted  by  applicable  law, be  amortized,  prorated,  allocated  and spread
throughout  the full term of the  Obligations  until payment in full so that the
rate or amount of interest on account of the initial Obligations does not exceed
the applicable usury ceiling, if any.




                         [Signatures begin on next page]

                                       13





PLEDGOR:                NANCE PETROLEUM CORPORATION
- -------


                        By:      /S/ DAVID W. HONEYFIELD
                                 -----------------------
                                 David W. Honeyfield
                                 Vice President - Finance


SECURED PARTY:          WACHOVIA BANK, NATIONAL ASSOCIATION, as
- -------------           Administrative Agent


                        By:      /S/ PHILIP J. TRINDER
                                 ---------------------
                        Name:    Philip J. Trinder
                        Title:   Vice President




                                       14





                                    EXHIBIT A

                               PLEDGED SECURITIES
                               ------------------


1.       NPC Inc., a Colorado  corporation  -- 100 shares of the common stock of
         NPC Inc.,  registered in the name of Nance Petroleum Corporation on the
         books of NPC Inc., as represented by Certificate No. 001.

EX-10

                                                                    EXHIBIT 10.7

              SUPPLEMENT AND AMENDMENT TO DEED OF TRUST, MORTGAGE,
            LINE OF CREDIT MORTGAGE, ASSIGNMENT, SECURITY AGREEMENT,
                     FIXTURE FILING AND FINANCING STATEMENT


         THIS  SUPPLEMENT  AND  AMENDMENT  TO DEED OF TRUST,  MORTGAGE,  LINE OF
CREDIT MORTGAGE,  ASSIGNMENT,  SECURITY AGREEMENT,  FIXTURE FILING AND FINANCING
STATEMENT (this  "Supplement") is entered into as of the effective time and date
hereinafter  stated (the  "Effective  Date") by ST. MARY LAND &  EXPLORATION
COMPANY ("Parent"),  a Delaware corporation (Taxpayer I.D. No. 41-0518430);  ST.
MARY ENERGY  COMPANY  ("Energy"),  a Delaware  corporation  (Taxpayer  I.D.  No.
76-0554924);  NANCE  PETROLEUM  CORPORATION  ("Nance"),  a  Montana  corporation
(Taxpayer I.D. No.  81-0309883);  and NPC Inc. ("NPC"),  a Colorado  corporation
(Taxpayer I.D. No.  11-3668557)  (Parent,  Energy,  Nance,  and NPC being herein
individually and collectively called "Mortgagor");  to Jay Chernosky, as Trustee
with respect to Property located in the State of Texas, whose address for notice
is 1001 Fannin  Street,  Suite 2255,  Houston,  Texas 77002,  for the benefit of
WACHOVIA BANK, NATIONAL ASSOCIATION,  as Administrative Agent (in such capacity,
the  "Agent")  for  the  lenders  (collectively,  the  "Lenders")  party  to the
hereinafter defined Credit Agreement.

                                    RECITALS

         A. Parent,  the Agent and the Lenders  entered into that certain Credit
Agreement dated as of January 27, 2003, by and among Parent, the Agent, and each
of the  Lenders  (together  with all  amendments  or  modifications  thereof and
supplements thereto the "Existing Credit Agreement").

         B. Each of Energy, Nance and NPC have guaranteed the prompt payment and
performance of all  indebtedness,  obligations  and liabilities of the Parent to
the Lenders  and/or  Agent  pursuant to the terms and  conditions  of a separate
Guaranty Agreement each dated as of January 27, 2003 (each an "Existing Guaranty
Agreement").

         C. The  indebtedness,  obligations  and  liabilities  of (i) the Parent
under or in connection with the Existing Credit Agreement and (ii) Energy, Nance
and NPC  under or in  connection  with the  Existing  Guaranty  Agreements,  are
secured by, among other things,  that certain Deed of Trust,  Mortgage,  Line of
Credit Mortgage,  Assignment,  Security Agreement,  Fixture Filing and Financing
Statement more particularly described in Annex I attached hereto and made a part
hereof for all purposes  (together with all supplements and amendments  thereto,
the "Mortgage").

         D. The Mortgage was duly recorded as set forth on attached Annex I.

         E.  Parent,  the Agent and the Lenders  have  amended and  restated the
Existing  Credit  Agreement by entering  into that certain  Amended and Restated
Credit  Agreement  dated as of April 7, 2005  (together  with all  amendments or
modifications thereof and supplements thereto, the "Credit Agreement"), whereby,
pursuant to which,  the Lenders have agreed to make certain  Loans to and extend
credit for the  account of Parent  subject to the  limitations  set forth in the

                                      -1-



Credit Agreement. The initial loans under the Credit Agreement have been used by
Parent to renew,  extend,  rearrange and modify all outstanding  indebtedness of
Parent under the Existing Credit Agreement.

         F.  Each of  Energy,  Nance and NPC have  amended  and  restated  their
respective  Existing Guaranty Agreement by entering into a "Guaranty  Agreement"
(as  defined in the  Credit  Agreement)  guaranteeing  the  prompt  payment  and
performance of all  indebtedness,  obligations  and liabilities of the Parent to
the Lenders and/or Agent under or in connection with the Credit Agreement.

         G. Mortgagor hereby desires to supplement and amend the Mortgage by (a)
adding to the  Mortgaged  Property  described  therein and  covered  thereby all
rights,  titles,  interests  and  estates  now owned or  hereafter  acquired  by
Mortgagor in and to the properties  described on Exhibit A-1 attached hereto and
made a part hereof for all  purposes,  and (b) amending in its entirety  Section
1.3 (Secured Indebtedness) of the Mortgage.

         NOW,  THEREFORE,  for good and valuable  consideration  in hand paid by
Mortgagor  to Agent and in  consideration  of the debts and  trusts  hereinafter
mentioned,  the receipt and sufficiency of all of which is hereby  acknowledged,
Mortgagor and Agent do hereby agree as follows:

                                   ARTICLE I
                               Grant and Mortgage
                               ------------------

         Section 1.1 Grant and Mortgage.  Mortgagor, for and in consideration of
                     ------------------
the sum of Ten  Dollars  ($10.00)  to  Mortgagor  in hand paid,  and in order to
secure the payment of the "secured  indebtedness"  (hereinafter defined) and the
performance  of  the   obligations,   covenants,   agreements,   warranties  and
undertakings of Mortgagor described in the Mortgage, as supplemented and amended
hereby, does hereby (a) GRANT, BARGAIN, SELL, CONVEY,  TRANSFER,  ASSIGN AND SET
OVER to Jay Chernosky,  as Trustee ("Trustee"),  and grant to Trustee a POWER OF
SALE  (pursuant  to the  Mortgage,  as  supplemented  and  amended  hereby,  and
applicable  law) with respect to, those of the following  described  properties,
rights and interests which are located in (or cover  properties  located in) the
State of Texas  and to which  the laws of any such  state  are  applicable  with
respect to the Mortgage, as supplemented and amended hereby, and/or the liens or
security  interests  created  hereby (the  "Additional  Deed of Trust  Mortgaged
Properties"),  and (b) MORTGAGE,  ASSIGN,  WARRANT,  PLEDGE AND  HYPOTHECATE  to
Agent,  and  grant  to  Agent a POWER  OF SALE  (pursuant  to the  Mortgage,  as
supplemented and amended hereby, and applicable law) with respect to, all of the
following  described rights,  interests and properties which were not granted to
Trustee  in  clause  (a)  above  (including,  without  limitation,  those of the
following  described  properties,  rights and interests which are located in (or
cover properties  located in ) the States of Louisiana,  Montana,  North Dakota,
Oklahoma or Wyoming and to which the laws of any such state are applicable  with
respect to the Mortgage, as supplemented and amended hereby, and/or the liens or
security   interests   created   hereby)  (the   "Additional   Other   Mortgaged
Properties"):

                  (a) The oil,  gas and/or  other  mineral  properties,  mineral
servitudes,  and/or  mineral  rights which are described in Exhibit A-1 attached
hereto and made a part hereof;

                                      -2-



                  (b) Without  limitation  of the  foregoing,  all other  right,
title and interest of Mortgagor of whatever kind or character (whether now owned
or hereafter  acquired by operation of law or  otherwise) in and to (i) the oil,
gas and/or mineral leases or other  agreements  described in Exhibit A-1 hereto,
(ii) the lands  described or referred to in Exhibit A-1 (or  described in any of
the instruments  described or referred to in Exhibit A-1), without regard to any
limitations  as to specific lands or depths that may be set forth in Exhibit A-1
hereto or in any of the leases or other  agreements  described  in  Exhibit  A-1
hereto and (iii) any other lands (including submerged lands) located anywhere in
the United States of America;

                  (c)  All  of  Mortgagor's   interest  (whether  now  owned  or
hereafter  acquired by operation of law or  otherwise)  in and to all  presently
existing and  hereafter  created oil, gas and/or  mineral  unitization,  pooling
and/or communitization agreements, declarations and/or orders, and in and to the
properties,   rights  and  interests  covered  and  the  units  created  thereby
(including, without limitation, units formed under orders, rules, regulations or
other  official  acts  of  any  federal,   state  or  other   authority   having
jurisdiction), which cover, affect or otherwise relate to the properties, rights
and interests described in clause A or B above;

                  (d) All of  Mortgagor's  interest in and rights under (whether
now owned or hereafter  acquired by operation of law or otherwise) all presently
existing  and  hereafter   created  operating   agreements,   equipment  leases,
production sales contracts,  processing agreements,  transportation  agreements,
gas balancing agreements, farmout and/or farm-in agreements, salt water disposal
agreements,  area of mutual  interest  agreements,  and other  contracts  and/or
agreements which cover,  affect,  or otherwise relate to the properties,  rights
and  interests  described in clause A, B or C above or to the  operation of such
properties,  rights  and  interests  or  to  the  treating,  handling,  storing,
processing,  transporting or marketing of oil, gas, other hydrocarbons, or other
minerals  produced from (or allocated to) such properties,  rights and interests
(including,  but not limited to, those contracts  listed in Exhibit A-1 hereto),
as same may be amended or supplemented from time to time;

                  (e)  All  of  Mortgagor's   interest  (whether  now  owned  or
hereafter acquired by operation of law or otherwise) in and to all improvements,
fixtures,  movable or immovable property and other real and/or personal property
(including,  without limitation,  all wells, pumping units,  wellhead equipment,
tanks, pipelines, flow lines, gathering lines,  compressors,  dehydration units,
separators,   meters,  buildings,  injection  facilities,  salt  water  disposal
facilities,  and power,  telephone  and  telegraph  lines),  and all  easements,
servitudes,  rights-of-way,  surface leases, licenses, permits and other surface
rights, which are now or hereafter used, or held for use, in connection with the
properties,  rights and  interests  described  in clause A, B or C above,  or in
connection with the operation of such  properties,  rights and interests,  or in
connection with the treating,  handling,  storing,  processing,  transporting or
marketing of oil, gas, other  hydrocarbons,  or other minerals produced from (or
allocated to) such properties, rights and interests; and

                  (f) All rights,  estates, powers and privileges appurtenant to
the foregoing rights, interests and properties.

         TO  HAVE  AND TO HOLD  (a)  the  Additional  Deed  of  Trust  Mortgaged
Properties  unto the Trustee,  and its  successors or substitutes in this trust,
and to its or their successors and assigns, in trust,  however,  upon the terms,

                                      -3-



provisions  and  conditions  herein  set  forth,  and (b) the  Additional  Other
Mortgaged  Properties unto Agent, and Agent's  successors and assigns,  upon the
terms,  provisions and conditions herein set forth (the Additional Deed of Trust
Mortgaged  Properties and the Additional  Other Mortgaged  Properties are herein
sometimes collectively called the "Additional Mortgaged Properties").

         Section 1.2 Grant of Security Interest.  Mortgagor hereby confirms that
                     --------------------------
it has heretofore granted, bargained, sold, conveyed, transferred, assigned, set
over, mortgaged, warranted, pledged and hypothecated to the Agent, and granted a
security  interest  to the Agent in,  the  "Property"  (as such term is  amended
hereby),  and  Mortgagor  hereby  further  grants,  bargains,   sells,  conveys,
transfers, assigns, sets over, mortgages,  warrants, pledges and hypothecates to
Agent, and grants a security  interest to Agent in, the Property,  to secure the
payment and performance of the secured indebtedness hereinafter referred to.

         Section 1.3 Secured Indebtedness. Section 1.3 of the Mortgage is hereby
                     --------------------
amended in its entirety to read as follows:

                  "Section 1.3 Secured  Indebtedness.  This Mortgage is executed
                               ---------------------
         and  delivered  by the  Mortgagor to secure and enforce the payment and
         performance of the following:

                           (a)  Payment  of  and  performance  of  any  and  all
                  indebtedness,  obligations and liabilities, including interest
                  (including,  without  limitation,  interest accruing after the
                  maturity of the "Loans" (as defined in the hereinafter defined
                  Credit  Agreement)  made by each Lender and interest  accruing
                  after  the  filing  of  any  petition  in  bankruptcy,  or the
                  commencement  of  any  insolvency,   reorganization   or  like
                  proceeding, relating to the Parent, whether or not a claim for
                  post-filing  or  post-petition  interest  is  allowed  in such
                  proceeding)  of the Parent  whether now  existing or hereafter
                  arising under or in connection  with that certain  Amended and
                  Restated  Credit  Agreement  dated as of April 7, 2005, by and
                  among Parent, Agent and the Lenders (as the same may from time
                  to time be amended or supplemented, the "Credit Agreement") or
                  any  other   "Loan   Document"   (as  defined  in  the  Credit
                  Agreement),  including,  without  limitation,  the "Notes" (as
                  defined in the Credit  Agreement)  in the  aggregate  original
                  principal  amount of  $500,000,000  with final  maturity on or
                  before April 7, 2010. The initial Loans made by the Lenders to
                  the Parent  under the Credit  Agreement  represent  a renewal,
                  extension,  rearrangement  and modification of all outstanding
                  indebtedness   of  the  Parent  under  the  "Existing   Credit
                  Agreement" (as defined in the Credit Agreement).

                           (b)   Payment   and   performance   of  any  and  all
                  indebtedness,  obligations  and liabilities of each of Energy,
                  Nance and NPC whether now existing or hereafter  arising under
                  or in connection with its respective  "Guaranty Agreement" (as
                  defined in the Credit Agreement).

                                      -4-



                           (c) Any sums  which  may be  advanced  or paid by the
                  Agent or any  Lender  under the terms  hereof or of the Credit
                  Agreement  or any Loan  Document  on account of the failure of
                  the  Mortgagor to comply with the  covenants of the  Mortgagor
                  contained  herein or in the Credit Agreement or any other Loan
                  Document;  and all other indebtedness of the Mortgagor arising
                  pursuant to the provisions of this Mortgage.

                           (d) Payment of and performance of any and all present
                  or future obligations of the Mortgagor  according to the terms
                  of any present or future  interest rate or currency swap, rate
                  cap, rate floor, rate collar,  forward rate agreement or other
                  exchange  or rate  protection  agreements  or any option  with
                  respect to any such  transaction  now  existing  or  hereafter
                  entered  into  between  the  Mortgagor  and any Lender (or any
                  Affiliate of such Lender).

                           (e) Payment of and performance of any and all present
                  or future obligations of the Mortgagor  according to the terms
                  of any present or future swap agreements,  cap, floor, collar,
                  forward  agreement or other exchange or protection  agreements
                  relating to crude oil,  natural gas or other  hydrocarbons  or
                  any option with respect to any such  transaction  now existing
                  or hereafter entered into between the Mortgagor and any Lender
                  (or any Affiliate of such Lender).

                           (f) Performance of all "Letter of Credit  Agreements"
                  (as  defined in the Credit  Agreement)  executed  from time to
                  time by the Parent or any  Subsidiary  of the Parent  under or
                  pursuant  to  the  Credit  Agreement  and  all   reimbursement
                  obligations for drawn or undrawn portions under any "Letter of
                  Credit" (as defined in the Credit  Agreement) now  outstanding
                  or   hereafter   issued   under  or  pursuant  to  the  Credit
                  Agreement."

         Section 1.4 Assignment of Production,  Accounts and Proceeds. Mortgagor
                     ------------------------------------------------
hereby confirms that it has heretofore absolutely and unconditionally  assigned,
transferred and set over and does hereby absolutely and unconditionally  assign,
transfer  and  set  over  to  Agent,  its  successors  and  assigns,  all of the
"Production"  (as defined in the Mortgage,  as supplemented  and amended hereby)
which accrues to  Mortgagor's  interest in the "Mortgaged  Properties"  (as such
term is  amended  hereby),  and all  "Production  Proceeds"  (as  defined in the
Mortgage,  as supplemented and amended hereby),  together with the immediate and
continuing right to collect and receive all such Production Proceeds.

                                   ARTICLE II
                             Definitions; References
                             -----------------------

         Section 2.1 Definitions.   All  capitalized  terms used but not defined
                     -----------
herein  shall  have the  meanings  assigned  to such terms in the  Mortgage,  as
supplemented and amended hereby.

                                      -5-



         Section 2.2 References.
                     ----------

                  (a) All  references in the Mortgage to "this  Mortgage"  shall
mean the Mortgage as  supplemented  and amended  hereby and as the same may from
time to time be further supplemented or amended.

                  (b) All  references in the Mortgage to "Mortgaged  Properties"
are  hereby  supplemented  and  amended  to  include  the  Additional  Mortgaged
Properties as defined and described in this  Supplement as if reference  thereto
were  fully made in the  Mortgage  at the time the  Mortgage  was  executed  and
recorded.

                  (c) All  references in the Mortgage to  "Property"  are hereby
supplemented  and  amended to include the  Additional  Mortgaged  Properties  as
defined and described in this Supplement as if reference thereto were fully made
in the Mortgage at the time the Mortgage was executed and recorded.

                  (d) All  references in the Mortgage to "Schedule I" are hereby
amended and supplemented to include the Wells described on Schedule I-A attached
to this  Supplement  as if reference  thereto were fully made in the Mortgage at
the time the Mortgage was executed.

                  (e) All  references  in the Mortgage to "Schedule I Wells" are
hereby amended and  supplemented  to include the Wells described on Schedule I-A
attached  to this  Supplement  as if  reference  thereto  were fully made in the
Mortgage at the time the Mortgage was executed.

                  (f) All references in the Mortgage to "Credit Agreement" shall
mean the Credit Agreement (as defined in the Recitals hereto).

                  (g) All  references  in the  Mortgage  to  "Agent"  shall mean
Wachovia Bank, National Association, as Administrative Agent for the Lenders.

                  (h) All references in the Mortgage to "Lenders" shall mean the
Lenders now or hereafter party to the Credit Agreement.

                  (i) All  references in the Mortgage to "secured  indebtedness"
and "indebtedness  secured hereby" shall mean all indebtedness,  obligations and
liabilities of Mortgagor  referred to in Section 1.3 of this  Supplement,  which
amends in its entirety  Section 1.3 of the  Mortgage,  together with any and all
renewals, rearrangements, modifications, increases and extensions thereof.

                  (j) All  references  in the Mortgage to "Notes" shall mean the
promissory  notes  issued,  executed and  delivered by the Parent to the Lenders
under the Credit Agreement, together with any and all renewals,  rearrangements,
modifications, increases and extensions thereof.


                  (k) All references in the Mortgage to "Loan  Documents"  shall
mean the Loan Documents (as defined in the Credit Agreement).

                                      -6-



                                  ARTICLE III
                                  Miscellaneous
                                  -------------

         Section 3.1 Extent of Amendments. The parties hereto hereby acknowledge
                     --------------------
and agree that except as specifically  amended,  changed or modified hereby, the
Mortgage  shall  remain in full force and effect in  accordance  with its terms.
None of the  rights,  titles  and  interests  existing  and to exist  under  the
Mortgage are hereby  released,  diminished  or impaired,  and  Mortgagor  hereby
reaffirms all covenants, representations and warranties made in the Mortgage.

         Section 3.2 Counterparts.   This  Supplement may be executed in several
                     ------------
counterparts,  all of  which  are  identical,  except  that,  (a) to  facilitate
recordation,  certain  counterparts  hereof  may  include  only that  portion of
Exhibit  A-1  which  contains  descriptions  of the  properties  located  in (or
otherwise subject to the recording or filing  requirements and/or protections of
the recording or filing acts or regulations  of) the recording  jurisdiction  in
which the  particular  counterpart  is to be  recorded,  and other  portions  of
Exhibit A-I shall be included in such  counterparts  by  reference  only and (b)
Schedule I-A is attached only to the master  counterparts  hereof being retained
by Mortgagor and Agent.




                          [SIGNATURES BEGIN NEXT PAGE]

                                      -7-



         EXECUTED this 7 day of April, 2005, to be effective, however, as of
                       -
April 7, 2005.

WITNESSES:               ST. MARY LAND & EXPLORATION
                         COMPANY
/S/ DEBRA J. ARROYO
- -------------------
Name: Debra J. Arroyo
      ---------------    By: /S/ DAVID W. HONEYFIELD
                             -----------------------
/S/ MOLLY DOLTON             David W. Honeyfield
- ----------------             Vice President - Finance, Secretary and Treasurer
Name: Molly Dolton
      ------------





The address and tax identification number of Parent are:

1776 Lincoln Street, Suite 700
Denver, Colorado 80203
(Denver County)
Taxpayer ID. No. 41-05 18430

The  address of Agent is:
201 South College Street
8th Floor NC 0680
Charlotte, NC 28288

The addresses of Trustees is:
Jay Chernosky
1001 Fannin Street, Suite 2255
Houston, Texas 77002

This instrument prepared by:
Craig W. Murray
Vinson & Elkins L.L.P.
1001 Fannin, Suite 2300
Houston, TX  77002


                                      -8-





STATE OF COLORADO                 ss.
                                  ss.
COUNTY OF DENVER                  ss.

         BE IT REMEMBERED THAT I, the undersigned authority, a notary public
duly qualified, commissioned, sworn and acting in and for the county and state
aforesaid, and being authorized in such county and state to take
acknowledgments, hereby certify that, on this 7 day of April, 2005, THERE
                                              -
personally appeared before me: David W. Honeyfield, the Vice President -
Finance, Secretary and Treasurer of St. Mary Land & Exploration Company, a
Delaware corporation, known to me to be such officer, such corporation being a
party to the foregoing instrument.

                  The foregoing instrument was acknowledged before me on this
                  day, by such person, the above designated officer of the
                  corporation specified following such person's name, on behalf
                  of said corporation.

                  On this date before me, the undersigned authority, personally
                  came and appeared such person, to me personally known and
                  known by me to be the person whose genuine signature is
                  affixed to the foregoing document as the above designated
                  officer of the corporation specified following such person's
                  name, who signed said document before me in the presence of
                  the two witnesses, whose names are thereto subscribed as such,
                  being competent witnesses, and who acknowledged, in my
                  presence and in the presence of said witnesses, that he signed
                  the above and foregoing document as his own free act and deed
                  on behalf of such corporation by authority of its board of
                  directors and as the free act and deed of such corporation and
                  for the uses and purposes therein set forth and apparent.

         IN WITNESS WHEREOF, I have hereunto set my hand and official seal in
the City of Denver, Denver County, Colorado on the day and year first above
written.

                            /S/ JAMES C. ROBERTSON
                            ----------------------
                            NOTARY PUBLIC, in and for the State of Colorado

                            James C. Robertson
                            ------------------
My commission expires:      (printed name)

February 14, 2009
- -----------------
[SEAL]


                                      -9-



         EXECUTED this 7 day of April, 2005, to be effective, however, as of
                       -
April 7, 2005.

WITNESSES:               ST. MARY ENERGY COMPANY

/S/ DEBRA J. ARROYO
- -------------------
Name: Debra J. Arroyo
      ---------------    By: /S/ DAVID W. HONEYFIELD
                             -----------------------
/S/ MOLLY DOLTON             David W. Honeyfield
- ----------------             Vice President - Finance, Secretary and Treasurer
Name: Molly Dolton
      ------------



The address and tax identification number of Energy are:

580 Westlake Park Blvd., Suite 600
Houston, Texas 77079
Taxpayer ID. No. 76-0554924


STATE OF COLORADO                 ss.
                                  ss.
COUNTY OF DENVER                  ss.

         BE IT REMEMBERED THAT I, the undersigned authority, a notary public
duly qualified, commissioned, sworn and acting in and for the county and state
aforesaid, and being authorized in such county and state to take
acknowledgments, hereby certify that, on this 7 day of April, 2005, there
                                              _
personally appeared before me: David W. Honeyfield, the Vice President -
Finance, Secretary and Treasurer of St. Mary Energy Company, a Delaware
corporation, known to me to be such officer, such corporation being a party to
the foregoing instrument.

                  The foregoing instrument was acknowledged before me on this
                  day, by such person, the above designated officer of the
                  corporation specified following such person's name, on behalf
                  of said corporation.

                  On this date before me, the undersigned authority, personally
                  came and appeared such person, to me personally known and
                  known by me to be the person whose genuine signature is
                  affixed to the foregoing document as tile above designated
                  officer of the corporation specified following such person's
                  name, who signed said document before me in the presence of
                  the two witnesses, whose names are thereto subscribed as such,
                  being competent witnesses, and who acknowledged, in my
                  presence and in tile presence of said witnesses, that he
                  signed the above and foregoing document as his own free act
                  and deed on behalf of such corporation by authority of its
                  board of directors and as the free act and deed of such
                  corporation and for the uses and purposes therein set forth
                  and apparent.

                                      -10-



         IN WITNESS WHEREOF, I have hereunto set my hand and official seal in
the City of Denver, Denver County, Colorado on the day and year first above
written.

                            /S/ JAMES C. ROBERTSON
                            ----------------------
                            NOTARY PUBLIC, in and for the State of Colorado

                            James C. Robertson
                            ------------------
My commission expires:      (printed name)

February 14, 2009
- -----------------
[SEAL]


                                      -11-




         EXECUTED this 7 day of April, 2005, to be effective, however, as of
                       -
April 7, 2005.

WITNESSES:               NANCE PETROLEUM CORPORATION

/S/ DEBRA J. ARROYO
- -------------------
Name: Debra J. Arroyo
      ---------------    By: /S/ DAVID W. HONEYFIELD
                             -----------------------
/S/ MOLLY DOLTON             David W. Honeyfield
- ----------------             Vice President - Finance
Name: Molly Dolton
      ------------


The address and tax identification number of Nance are:

550 North 31st Street, Suite 500
Billings, Montana 59101
(Yellowstone County)
Taxpayer ID. No. 8 1-0309883


STATE OF COLORADO                 ss.
                                  ss.
COUNTY OF DENVER                  ss.

         BE IT REMEMBERED THAT I, the undersigned authority, a notary public
duly qualified, commissioned, sworn and acting in and for the county and state
aforesaid, and being authorized in such county and state to take
acknowledgments, hereby certify that, on this 7 day of April, 2005, there
                                              -
personally appeared before me: David W. Honeyfield, the Vice President -Finance
of Nance Petroleum Corporation, a Montana corporation, known to me to be such
officer, such corporation being a party to the foregoing instrument.

                  The foregoing instrument was acknowledged before mc on this
                  day, by such person, the above designated officer of the
                  corporation specified following such person's name, on behalf
                  of said corporation.

                  On this date before me, the undersigned authority, personally
                  came and appeared such person, to me personally known and
                  known by me to be the person whose genuine signature is
                  affixed to the foregoing document as the above designated
                  officer of the corporation specified following such person's
                  name, who signed said document before me in the presence of
                  the two witnesses, whose names are thereto subscribed as such,
                  being competent witnesses, and who acknowledged, in my
                  presence and in the presence of said witnesses, that he signed
                  the above and foregoing document as his own free act and deed
                  on behalf of such corporation by authority of its board of
                  directors and as the free act and deed of such corporation and
                  for the uses and purposes therein set forth and apparent.


         IN WITNESS WHEREOF. I have hereunto set my hand and official seal in
the City of Denver, Denver County, Colorado, on the day and year first above
written.

                            /S/ JAMES C. ROBERTSON
                            ----------------------
                            NOTARY PUBLIC, in and for the State of Colorado

                            James C. Robertson
                            ------------------
My commission expires:      (printed name)

February 14, 2009
- -----------------
[SEAL]


                                      -13-





         EXECUTED this 7 day of April, 2005, to be effective, however, as of
                       -
April 7, 2005.

WITNESSES:               NPC INC.

/S/ DEBRA J. ARROYO
- -------------------
Name: Debra J. Arroyo
      ---------------    By: /S/ DAVID W. HONEYFIELD
                             -----------------------
/S/ MOLLY DOLTON             David W. Honeyfield
- ----------------             Vice President - Finance
Name: Molly Dolton
      ------------




The address and tax identification number of NPC Inc. are:

550 North 31st Street, Suite 500
Billings, Montana  59101
(Yellowstone County)
Taxpayer ID. No. 11-3668557


STATE OF COLORADO                   ss.
CITY AND                                    ss.
COUNTY OF DENVER                            ss.

         BE IT REMEMBERED THAT I, the undersigned authority, a notary public
duly qualified, commissioned, sworn and acting in and for the county and state
aforesaid, and being authorized in such county and state to take
acknowledgments, hereby certify that, on this 7 day of April, 2005, there
                                              -
personally appeared before me: David W. Honeyfield, the Vice President - Finance
of NPC INC., a Colorado corporation, known to me to be such officer, such
corporation being a party to the foregoing instrument.

                  The foregoing instrument was acknowledged before me on this
                  day, by such person, the above designated officer of the
                  corporation specified following such person's name, on behalf
                  of said corporation.

                  On this date before me, the undersigned authority, personally
                  came and appeared such person, to me personally known and
                  known by me to be the person whose genuine signature is
                  affixed to the foregoing document as the above designated
                  officer of the corporation specified following such person's
                  name, who signed said document before me in the presence of
                  the two witnesses, whose names are thereto subscribed as such,
                  being competent witnesses, and who acknowledged, in my
                  presence and in the presence of said witnesses, that he signed
                  the above and foregoing document as his own free act and deed
                  on behalf of such corporation by authority of its board of
                  directors and as the free act and deed of such corporation and
                  for the uses and purposes therein set forth and apparent.


         IN WITNESS WHEREOF, I have hereunto set my hand and official seal in
the City of Denver, Denver County, Colorado, on the day and year first above
written.

                            /S/ JAMES C. ROBERTSON
                            ----------------------
                            NOTARY PUBLIC, in and for the State of Colorado

                            James C. Robertson
                            ------------------
My commission expires:      (printed name)

February 14, 2009
- -----------------
[SEAL]


                                      -15-




         EXECUTED this 7 day of April, 2005, to be effective, however, as of
                       _
April 7, 2005.

WITNESSES:               WACHOVIA BANK, NATIONAL
                         ASSOCIATION, as Administrative Agent

- ------------------
Name:-------------
                         By:    /S/ PHILIP J. TRINDER
                                ---------------------
- ------------------              Name:  Philip J. Trinder
Name: ------------              Title: Vice President




The address of Agent is:

201 South College Street
8th Floor NC 0680
Charlotte, North Carolina 28288


STATE OF TEXAS                ss.
                              ss.
COUNTY OF HARRIS              ss.

         BE IT REMEMBERED THAT I, the undersigned authority, a notary public
duly qualified, commissioned, sworn and acting in and for the county and state
aforesaid, and being authorized in such county and state to take
acknowledgments, hereby certify that, on this 7 day of April, 2005, there
                                              -
personally appeared before me: Philip J. Trinder, the Vice President of Wachovia
Bank, National Association, a national banking association, known to me to be
such officer, such banking association being a party to the foregoing
instrument.

                  The foregoing instrument was acknowledged before me on this
                  day, by such person, the above designated officer of the
                  banking association specified following such person's name, on
                  behalf of said banking association.

                  On this date before me, the undersigned authority, personally
                  came and appeared such person, to me personally known and
                  known by me to be the person whose genuine signature is
                  affixed to the foregoing document as the above designated
                  officer of the banking association specified following such
                  person's name, who signed said document before me in the
                  presence of the two witnesses, whose names are thereto
                  subscribed as such, being competent witnesses, and who
                  acknowledged, in my presence and in the presence of said
                  witnesses, that he signed the above and foregoing document as
                  his own free act and deed on behalf of such banking
                  association by authority of its board of directors and as the
                  free act and deed of such banking association and for the uses
                  and purposes therein set forth and apparent.


         IN WITNESS WHEREOF, I have hereunto set my hand and official seal in
the City of Houston, Harris County, Texas, on the day and year first above
written.

                            -----------------------------------------------
                            NOTARY PUBLIC, in and for the State of Texas


                            -----------------------------------------------
My commission expires:      (printed name)


- -----------------
[SEAL]


                                      -17-

EX-10

                                                                    EXHIBIT 10.8

(LA, MT, ND, OK, TX, WY)

                DEED OF TRUST, MORTGAGE, LINE OF CREDIT MORTGAGE
                 ASSIGNMENT, SECURITY AGREEMENT, FIXTURE FILING
                             AND FINANCING STATEMENT

                                      FROM

                     ST. MARY LAND & EXPLORATION COMPANY
                         (Taxpayer I.D. No. 41-05 18430)

                             ST. MARY ENERGY COMPANY
                         (Taxpayer I.D. No. 76-0554924)

                           NANCE PETROLEUM CORPORATION
                         (Taxpayer I.D. No. 8 1-0309883)

                                    NPC INC.
                         (Taxpayer I.D. No. 11-3668557)

                                       TO

                             JAY CHERNOSKY, TRUSTEE

                                       AND

                      WACHOVIA BANK, NATIONAL ASSOCIATION,
                             as Administrative Agent

                       Dated Effective as of April 7, 2005

A CARBON, PHOTOGRAPHIC, FACSIMILE, OR OTHER REPRODUCTION OF THIS INSTRUMENT IS
SUFFICIENT AS A FINANCING STATEMENT.

THIS INSTRUMENT CONTAINS AFTER-ACQUIRED PROPERTY PROVISIONS, SECURES PAYMENT OF
FUTURE ADVANCES, AND COVERS PROCEEDS OF COLLATERAL.

THIS INSTRUMENT COVERS, AMONG OTHER THINGS, (A) GOODS WHICH ARE OR ARE TO BECOME
FIXTURES  RELATED TO THE REAL PROPERTY  DESCRIBED  HEREIN,  AND (B) AS-EXTRACTED
COLLATERAL  RELATED TO THE REAL PROPERTY  DESCRIBED  HEREIN  (INCLUDING  WITHOUT
LIMITATION,  OIL, GAS, OTHER MINERALS AND OTHER SUBSTANCES OF VALUE WHICH MAY BE
EXTRACTED FROM THE EARTH AND ACCOUNTS ARISING OUT OF THE SALE AT THE WELLHEAD OR
MINEHEAD  THEREOF).  THIS  INSTRUMENT  IS TO BE FILED FOR  RECORD,  AMONG  OTHER
PLACES, IN THE REAL ESTATE OR COMPARABLE RECORDS OF THE COUNTIES AND/OR PARISHES
REFERENCED  IN  EXHIBIT  A HERETO  AND SUCH  FILING  SHALL  SERVE,  AMONG  OTHER
PURPOSES, AS A FIXTURE FILING AND AS A FINANCING STATEMENT COVERING AS-EXTRACTED



COLLATERAL.  THE  MORTGAGOR  HAS AN INTEREST OF RECORD IN THE REAL ESTATE AND/OR
IMMOVABLE PROPERTY CONCERNED, WHICH INTEREST IS DESCRIBED IN SECTION 1.1 OF THIS
INSTRUMENT.

A POWER OF SALE HAS BEEN  GRANTED  IN THIS  MORTGAGE.  APOWER  OF SALE MAY ALLOW
- --------------------------------------------------------------------------------
AGENT (AS HEREINAFTER DEFINED) OR TI-IF TRUSTEE (AS HEREINAFTER DEFINED) TO TAKE
- --------------------------------------------------------------------------------
THE MORTGAGED  PROPERTIES  AND SELL THEM WITHOUT GOING TO COURT IN A FORECLOSURE
- --------------------------------------------------------------------------------
ACTION  UPON  DEFAULT  BY THE  MORTGAGOR  (AS  HEREINAFTER  DEFINED)  UNDER THIS
- --------------------------------------------------------------------------------
MORTGAGE.
- ---------


WHEN RECORDED OR FILED RETURN TO:                  THIS DOCUMENT PREPARED BY:

Vinson & Elkins L.L.P.                         Craig W. Murray
2300 First City Tower                              Vinson & Elkins L.L.P.
Houston, Texas 77002                               2300 First City Tower
Attention: Brian R. Howard                         Houston, Texas 77002



                DEED OF TRUST, MORTGAGE, LINE OF CREDIT MORTGAGE
                 ASSIGNMENT, SECURITY AGREEMENT, FIXTURE FILING
                             AND FINANCING STATEMENT
                                (this "Mortgage")

                                   ARTICLE I.

                     Granting Clauses: Secured Indebtedness
                     --------------------------------------

     Section 1.1 Grant and Mortgage.  St. Mary Land & Exploration Company, a
                 ------------------
Delaware corporation ("Parent"), St. Mary Energy Company, a Delaware corporation
("Energy"),  Nance Petroleum Corporation,  a Montana corporation ("Nance"),  and
NPC Inc., a Colorado  corporation ("NPC");  Parent,  Energy, Nance and NPC being
herein  collectively  called "Mortgagor" and Energy,  Nance and NPC being herein
sometimes   collectively   called  a   "Subsidiary   Mortgagor"),   for  and  in
consideration  of the sum of Ten Dollars ($10.00) to Mortgagor in hand paid, and
in order to secure the payment of the secured indebtedness  hereinafter referred
to and the performance of the obligations, covenants, agreements, warranties and
undertakings of Mortgagor hereinafter described, does hereby (a) GRANT, BARGAIN,
SELL, CONVEY, TRANSFER, ASSIGN AND SET OVER to Trustee (as hereinafter defined),
and grant to Trustee a POWER OF SALE  (pursuant to this Mortgage and  applicable
law) with respect to, those of the following  described  properties,  rights and
interests  which are  located in (or cover  properties  located in) the State of
Texas or which are  located  within (or cover  properties  located  within)  the
offshore area over which the United States of America asserts  jurisdiction  and
to which the laws of any such state are applicable with respect to this Mortgage
and/or  the liens or  security  interests  created  hereby  (the  "Deed of Trust
Mortgaged   Properties"),   and  (b)  MORTGAGE,   ASSIGN,  WARRANT,  PLEDGE  AND
HYPOTHECATE to Agent (as defined in Section 1.3(a) below),  and grant to Agent a
POWER OF SALE  (pursuant to this Mortgage and  applicable  law) with respect to,
all of the following  described rights,  interests and properties which were not
granted to Trustee in clause (a) above (including,  without limitation, those of
the following  described  properties,  rights and interests which are located in
(or cover  properties  located  in ) the  States of  Louisiana,  Montana,  North
Dakota,  Oklahoma  or Wyoming or which are located  within (or cover  properties
located  within)  the  offshore  area over  which the  United  States of America
asserts jurisdiction and to which the laws of any such state are applicable with
respect to this Mortgage and/or the liens or security  interests created hereby)
(the "Other Mortgaged Properties"):

          A. The oil, gas and/or other mineral  properties,  mineral servitudes,
and/or mineral rights which are described in Exhibit A attached  hereto and made
a part hereof;

          B. Without  limitation of the  foregoing,  all other right,  title and
interest  of  Mortgagor  of whatever  kind or  character  (whether  now owned or
hereafter  acquired by operation of law or otherwise) in and to (i) the oil, gas
and/or mineral leases or other  agreements  described in Exhibit A hereto,  (ii)
the lands  described  or  referred to in Exhibit A (or  described  in any of the
instruments  described  or  referred  to in Exhibit  A),  without  regard to any
limitations  as to  specific  lands or depths that may be set forth in Exhibit A
hereto or in any of the leases or other agreements described in Exhibit A hereto
and (iii) any other lands  (including  submerged  lands) located anywhere in the
United  States of America or located  offshore the United  States of America but

                                      -1-



within the  offshore  area over which the United  States of America or any State
thereof asserts jurisdiction;

          C.  All of  Mortgagor's  interest  (whether  now  owned  or  hereafter
acquired by operation of law or otherwise) in and to all presently  existing and
hereafter   created  oil,  gas  and/or  mineral   unitization,   pooling  and/or
communitization  agreements,  declarations  and/or  orders,  and  in  and to the
properties,   rights  and  interests  covered  and  the  units  created  thereby
(including, without limitation, units formed under orders, rules, regulations or
other  official  acts  of  any  federal,   state  or  other   authority   having
jurisdiction), which cover, affect or otherwise relate to the properties, rights
and interests described in clause A or B above;

          D. All of Mortgagor's  interest in and rights under (whether now owned
or hereafter  acquired by operation of law or otherwise) all presently  existing
and hereafter created operating agreements,  equipment leases,  production sales
contracts,  processing  agreements,  transportation  agreements,  gas  balancing
agreements,  farmout and/or farm-in agreements,  salt water disposal agreements,
area of mutual interest agreements,  and other contracts and/or agreements which
cover,  affect,  or otherwise  relate to the  properties,  rights and  interests
described  in clause  A, B or C above or to the  operation  of such  properties,
rights  and  interests  or  to  the  treating,  handling,  storing,  processing,
transporting  or marketing of oil, gas,  other  hydrocarbons,  or other minerals
produced  from  (or  allocated  to)  such   properties,   rights  and  interests
(including,  but not limited to, those contracts listed in Exhibit A hereto), as
same may be amended or supplemented from time to time;

          E.  All of  Mortgagor's  interest  (whether  now  owned  or  hereafter
acquired by operation of law or otherwise) in and to all improvements, fixtures,
movable  or  immovable   property  and  other  real  and/or  personal   property
(including,  without limitation,  all wells, pumping units,  wellhead equipment,
tanks, pipelines, flow lines, gathering lines,  compressors,  dehydration units,
separators,   meters,  buildings,  injection  facilities,  salt  water  disposal
facilities,  and power,  telephone  and  telegraph  lines),  and all  easements,
servitudes,  rights-of-way,  surface leases, licenses, permits and other surface
rights, which are now or hereafter used, or held for use, in connection with the
properties,  rights and  interests  described  in clause A, B or C above,  or in
connection with the operation of such  properties,  rights and interests,  or in
connection with the treating,  handling,  storing,  processing,  transporting or
marketing of oil, gas, other  hydrocarbons,  or other minerals produced from (or
allocated to) such properties, rights and interests; and

          F. All  rights,  estates,  powers and  privileges  appurtenant  to the
foregoing rights, interests and properties.

     TO HAVE AND TO HOLD (a) the Deed of  Trust  Mortgaged  Properties  unto the
Trustee,  and its successors or  substitutes in this trust,  and to its or their
successors  and  assigns,  in trust,  however,  upon the terms,  provisions  and
conditions herein set forth, and (b) the Other Mortgaged  Properties unto Agent,
and Agent's  successors and assigns,  upon the terms,  provisions and conditions
herein set forth (the Deed of Trust Mortgaged Properties and the Other Mortgaged
Properties are herein sometimes collectively called the "Mortgaged Properties").
As used  throughout  this Mortgage,  the term "Trustee" shall mean Jay Chernosky
whose address is 1001 Fannin Street, Suite 2255, Houston, Texas 77002.

                                      -2-



     Section 1.2 Grant of  Security  Interest.  In order  to further  secure the
                 ----------------------------
payment of the secured indebtedness  hereinafter referred to and the performance
of the  obligations,  covenants,  agreements,  warranties,  and  undertakings of
Mortgagor hereinafter described, Mortgagor hereby grants to Agent (as defined in
Section  1.3(a) below) a security  interest in the entire  interest of Mortgagor
(whether now owned or hereafter  acquired by operation of law or  otherwise)  in
and to:

     (a) to the extent a security interest may be created therein, the Mortgaged
Properties;

     (b) all oil, gas, other  hydrocarbons,  and other minerals produced from or
allocated to the Mortgaged  Properties,  and any products  processed or obtained
therefrom  (herein  collectively  called the  "Production"),  together  with all
proceeds of Production  (regardless of whether Production to which such proceeds
relate  occurred on or before or after the date  hereof),  and together with all
liens and security interests securing payment of the proceeds of the Production,
including,  but not limited to, those liens and security  interests provided for
under  (i)  statutes  enacted  in  the  jurisdictions  in  which  the  Mortgaged
Properties  are located,  or (ii)  statutes  made  applicable  to the  Mortgaged
Properties under federal law (or some combination of federal and state law);

     (c) without  limitation  of any other  provisions  of this Section 1.2, all
payments   received  in  lieu  of  production  from  the  Mortgaged   Properties
(regardless of whether such payments accrued,  and/or the events which gave rise
to such payments  occurred,  on or before or after the date hereof),  including,
without  limitation,  "take or pay"  payments  and  similar  payments,  payments
received in  settlement  of or pursuant to a judgment  rendered  with respect to
take or pay or similar obligations or other obligations under a production sales
contract,  payments  received  in buyout or  buydown  or other  settlement  of a
production  sales  contract,  and  payments  received  under a gas  balancing or
similar  agreement as a result of (or received  otherwise  in  settlement  of or
pursuant to judgment  rendered  with  respect to) rights held by  Mortgagor as a
result of Mortgagor  (and/or its  predecessors  in title) taking or having taken
less gas from lands covered by a Mortgaged Property (or lands pooled or unitized
therewith) than their ownership of such Mortgaged Property would entitle them to
receive (the  payments  described  in this  subsection  (c) being herein  called
"Payments in Lieu of Production");

     (d) all equipment, inventory, improvements, fixtures, accessions, goods and
other personal  property or movable property of whatever nature now or hereafter
located on or used or held for use in connection  with the Mortgaged  Properties
(or in connection with the operation thereof or the treating, handling, storing,
processing,  transporting,  or  marketing of  Production),  and all licenses and
permits of whatever  nature now or hereafter  used or held for use in connection
with the Mortgaged  Properties (or in connection  with the operation  thereof or
the  treating,  handling,  storing,  processing,  transporting,  or marketing of
Production),  and all renewals or replacements of the foregoing or substitutions
for the foregoing;

     (e) all  contract  rights,  choses  in  action  (i.e.,  rights  to  enforce
contracts  or to bring  claims  thereunder),  commercial  tort  claims and other
general  intangibles  (regardless  of whether the same arose,  and/or the events
which  gave rise to the same  occurred,  on or before or after the date  hereof)
related to the Mortgaged Properties, the operation thereof (whether Mortgagor is
operator or  non-operator),  or the  treating,  handling,  storing,  processing,

                                      -3-



transporting, or marketing of Production (including,  without limitation, any of
the same  relating to payment of proceeds of Production or to payment of amounts
which could constitute Payments in Lieu of Production);

     (f) Without  limitation of the generality of the foregoing,  any rights and
interests  of Mortgagor  under any present or future  hedge or swap  agreements,
cap, floor, collar, exchange, forward or other hedge or protection agreements or
transactions  relating to crude oil, natural gas or other  hydrocarbons,  or any
option  with  respect to any such  agreement  or  transaction  now  existing  or
hereafter entered into by or on behalf of Mortgagor;

     (g) all geological, geophysical, engineering, accounting, title, legal, and
other  technical or business  data  concerning  the  Mortgaged  Properties,  the
Production or any other item of Property (as hereinafter  defined) which are now
or hereafter in the possession of Mortgagor or in which  Mortgagor can otherwise
grant a  security  interest,  and all books,  files,  records,  magnetic  media,
software and other forms of recording or obtaining access to such data;

     (h) all money,  documents,  instruments,  chattel paper (including  without
limitation,  electronic  chattel paper and tangible  chattel  paper),  rights to
payment evidenced by chattel paper, securities,  accounts,  payment intangibles,
general  intangibles,  letters of credit,  letter-of-credit  rights,  supporting
obligations  and  rights to payment  of money  arising  from or by virtue of any
transaction  (regardless  of whether such  transaction  occurred on or before or
after the date hereof)  related to the Mortgaged  Properties,  the Production or
any other item of Property;

     (i) all rights,  titles and  interests  now owned or hereafter  acquired by
Mortgagor in any and all goods, inventory,  equipment,  as-extracted collateral,
documents, money, instruments,  intellectual property,  certificated securities,
uncertificated  securities,  investment property,  letters of credit,  rights to
proceeds  of  written  letters  of  credit  and other  letter-of-credit  rights,
commercial  tort  claims,   deposit  accounts,   payment  intangibles,   general
intangibles,  contract rights,  chattel paper  (including,  without  limitation,
electronic  chattel  paper  and  tangible  chattel  paper),  rights  to  payment
evidenced by chattel  paper,  software,  supporting  obligations  and  accounts,
wherever located, and all rights and privileges with respect thereto (all of the
properties,  rights and interests  described in subsections  (a), (b), (c), (d),
(e),  (f),  (g) and (h) above and this  subsection  (i) being  herein  sometimes
collectively called the "Collateral"); and

     (j) all proceeds of the  Collateral,  whether such proceeds or payments are
goods,  money,  documents,  instruments,  chattel paper,  securities,  accounts,
payment intangibles,  general intangibles,  fixtures,  real/immovable  property,
personal/  movable  property or other  assets  (the  Mortgaged  Properties,  the
Collateral   and  the  proceeds  of  the  Collateral   being  herein   sometimes
collectively called the "Property").

Except as  otherwise  expressly  provided  in this  Mortgage,  all terms in this
Mortgage  relating to the  Collateral  and the grant of the  foregoing  security
interest  which are  defined in the Texas  Uniform  Commercial  Code (the "UCC")
shall have the meanings  assigned to them in Article 9 (or, absent definition in
Article 9, in any other  Article) of the UCC, as those  meanings may be amended,
revised  or  replaced  from time to time.  Notwithstanding  the  foregoing,  the
parties  intend that the terms used herein which are defined in the UCC have, at
all times, the broadest and most inclusive  meanings possible.  Accordingly,  if
the UCC shall in the  future be  amended  or held by a court to define  any term
used herein more  broadly or  inclusively  than the UCC in effect on the date of

                                      -4-



this  Mortgage,  then such term, as used herein,  shall be given such  broadened
meaning.  If the UCC shall in the future be amended or held by a court to define
any term used herein more narrowly, or less inclusively,  than the UCC in effect
on the date of this Mortgage,  such amendment or holding shall be disregarded in
defining terms used in this Mortgage

     Section 1.3 Secured  Indebtedness.  This Mortgage is executed and delivered
                 ---------------------
by the  Mortgagor  to secure and  enforce the  payment  and  performance  of the
following:

     (a) Payment of and performance of any and all indebtedness, obligations and
liabilities,   including  interest  (including,  without  limitation,   interest
accruing  after the  maturity  of the  "Loans"  (as  defined in the  hereinafter
defined Credit  Agreement)  made by each Lender and interest  accruing after the
filing of any petition in bankruptcy,  or the  commencement  of any  insolvency,
reorganization  or like  proceeding,  relating to the  Parent,  whether or not a
claim for post-filing or  post-petition  interest is allowed in such proceeding)
of the Parent  whether now existing or hereafter  arising under or in connection
with that certain  Amended and Restated  Credit  Agreement  dated as of April 7,
2005,  by  and  among  Parent,   Wachovia   Bank,   National   Association,   as
Administrative Agent (in such capacity, the "Agent") and the Lenders as the same
may from time to time be amended or supplemented, the "Credit Agreement") or any
other "Loan Document" (as defined in the Credit Agreement),  including,  without
limitation,  the "Notes" (as defined in the Credit  Agreement)  in the aggregate
original principal amount of $500,000,000 with final maturity on or before April
7, 2010.

     (b) Payment and  performance of any and all  indebtedness,  obligations and
liabilities of Energy,  Nance and NPC whether now existing or hereafter  arising
under or in connection  with the "Guaranty  Agreement" (as defined in the Credit
Agreement).

     (c) Any sums which may be advanced or paid by the Agent or any Lender under
the terms hereof or of the Credit  Agreement or any Loan  Document on account of
the failure of the  Mortgagor  to comply  with the  covenants  of the  Mortgagor
contained herein or in the Credit Agreement or any other Loan Document;  and all
other  indebtedness of the Mortgagor  arising pursuant to the provisions of this
Mortgage.

     (d) Payment of and performance of any and all present or future obligations
of the Mortgagor  according to the terms of any present or future  interest rate
or currency swap, rate cap, rate floor,  rate collar,  forward rate agreement or
other exchange or rate  protection  agreements or any option with respect to any
such  transaction  now existing or hereafter  entered into between the Mortgagor
and any Lender (or any Affiliate of such Lender).

     (e) Payment of and performance of any and all present or future obligations
of the  Mortgagor  according  to  the  terms  of  any  present  or  future  swap
agreements,   cap,  floor,  collar,  forward  agreement  or  other  exchange  or
protection  agreements  relating to crude oil, natural gas or other hydrocarbons
or any option with  respect to any such  transaction  now  existing or hereafter
entered  into  between the  Mortgagor  and any Lender (or any  Affiliate of such
Lender).

     (f)  Performance  of all "Letter of Credit  Agreements"  (as defined in the
Credit Agreement)  executed from time to time by the Parent or any Subsidiary of

                                      -5-



the Parent  under or  pursuant  to the Credit  Agreement  and all  reimbursement
obligations  for drawn or undrawn  portions  under any  "Letter  of Credit"  (as
defined in the Credit  Agreement) now  outstanding or hereafter  issued under or
pursuant to the Credit Agreement.

     Section 1.4 Secured  Indebtedness.  The indebtedness referred to in Section
                 ---------------------
1.3,  and  all  renewals,   extensions  and  modifications   thereof,   and  all
substitutions therefor, in whole or in part, are herein sometimes referred to as
the  "secured   indebtedness"  or  the  "indebtedness  secured  hereby".  It  is
contemplated  and  acknowledged  that  the  secured   indebtedness  may  include
revolving  credit loans and advances  from time to time,  and that this Mortgage
shall have effect,  as of the date hereof,  to secure all secured  indebtedness,
regardless  of whether any amounts are advanced on the date hereof or on a later
date or, whether having been advanced,  are later repaid in part or in whole and
further advances made at a later date.

     Section 1.5 MAXIMUM SECURED AMOUNT. NOTWITHSTANDING ANY PROVISION HEREOF TO
                 ----------------------
THE CONTRARY,  THE OUTSTANDING  INDEBTEDNESS  SECURED BY PROPERTY LOCATED IN THE
STATES OF  LOUISIANA  OR MONTANA  SHALL  NOT,  AT ANY TIME OR FROM TIME TO TIME,
EXCEED AN AGGREGATE MAXIMUM AMOUNT OF $600,000,000.

     Section 1.6 Intentionally Left Blank.
                 ------------------------
     Section 1.7 Limit  on  Secured  Indebtedness  and  Collateral.  It  is  the
                 -------------------------------------------------
intention of each Subsidiary Mortgagor, Agent and Lenders that this Mortgage not
constitute a fraudulent  transfer or  fraudulent  conveyance  under any state or
federal law that may be applied hereto.  Each  Subsidiary  Mortgagor and, by its
acceptance hereof, Agent hereby acknowledge and agree that,  notwithstanding any
other provision of this Mortgage:  (a) the  indebtedness  secured hereby by such
Subsidiary Mortgagor shall be limited to the maximum amount of indebtedness that
can be incurred or secured by such Subsidiary  Mortgagor  without rendering this
Mortgage subject to avoidance under Section 548 of the United States  Bankruptcy
Code or any comparable  provisions of any  applicable  state or federal law, and
(b) the Property granted by such Subsidiary Mortgagor hereunder shall be limited
to the  maximum  amount  of  Property  that can be  granted  by such  Subsidiary
Mortgagor without rendering this Mortgage subject to avoidance under Section 548
of the  United  States  Bankruptcy  Code  or any  comparable  provisions  of any
applicable state or federal law.

                                  ARTICLE II.

                    Representations, Warranties and Covenants
                    -----------------------------------------

     Section 2.1 Mortgagor represents, warrants, and covenants as follows:

     (a)  Title  and  Permitted  Encumbrances.   Mortgagor  has,  and  Mortgagor
          -----------------------------------
covenants to maintain, good and defensible title to the Property, free and clear
of all liens, security interests, and encumbrances except for (i) the contracts,
agreements,   burdens,   encumbrances   and  other  matters  set  forth  in  the
descriptions  of certain of the Mortgaged  Properties on Exhibit A hereto,  (ii)
the liens and security  interests  evidenced by this Mortgage,  (iii)  statutory
liens for  taxes  which  are not yet  delinquent,  (iv)  liens  under  operating
agreements,  pooling  orders and  unitization  agreements,  and  mechanics'  and

                                      -6-



materialmen's  liens, with respect to obligations which are not yet due, and (v)
other  liens and  security  interests  (if any) in favor of Agent  (the  matters
described in the foregoing clauses (i), (ii), (iii),  (iv), and (v) being herein
called the "Permitted Encumbrances"); Mortgagor will warrant and defend title to
the Property,  subject as aforesaid,  against the claims and demands  (including
claims  which  would be a  Permitted  Encumbrance  under item (vi) above) of all
persons claiming or to claim the same or any part thereof. Without limitation of
the foregoing,  the ownership by Mortgagor of the Mortgaged  Properties does and
will,  with  respect to each well or unit  identified  on Schedule  I,  attached
hereto and made a part  hereof,  entitle  Mortgagor  to receive  (subject to the
terms and provisions of this Mortgage) a decimal or percentage share of the oil,
gas and other  hydrocarbons  produced  from,  or allocated to, such well or unit
equal to not less than the decimal or percentage  share set forth, for such well
or unit,  in the  column  headed  "Net  Revenue  Interest"  (or words of similar
import) on Schedule I, and cause  Mortgagor to be obligated to bear a decimal or
percentage share of the cost of operation of such well or unit equal to not more
than the decimal or  percentage  share set forth,  for such well or unit, in the
column headed "Working Interest" (or words of similar import) on Schedule I. The
above-described  shares of production which Mortgagor is entitled to receive and
shares of expenses which  Mortgagor is obligated to bear are not and will not be
subject to change  (other  than  changes  which arise  pursuant  to  non-consent
provisions of operating  agreements  described in Exhibit A in  connection  with
operations  hereafter  proposed),  except,  and only to the  extent  that,  such
changes are  reflected in Schedule I. There is not and will not be any unexpired
financing  statement  covering  any part of the  Property  on file in any public
office  naming any party  other than Agent as  secured  party.  Upon  request by
Agent, Mortgagor will deliver to Agent schedules of all internal and third party
information  identifying the Mortgaged  Properties (such as, for example,  lease
names and  numbers  assigned  by  Mortgagor  or the  operator  of any  Mortgaged
Property,  well  and/or  unit  and/or  property  names and  numbers  assigned by
purchasers of Production,  and internal identification names and numbers used by
Mortgagor in accounting for revenues,  costs,  and joint  interest  transactions
attributable to the Mortgaged Properties). The listing of Permitted Encumbrances
above is made for the purpose of limiting certain  warranties and covenants made
by Mortgagor  herein;  such  listing is not  intended to affect the  description
herein of the Mortgaged  Properties  nor to  subordinate  the liens and security
interests hereunder to any Permitted Encumbrances.

     (b)  Leases and Contracts; Performance of Obligations.  The oil, gas and/or
          ------------------------------------------------
mineral leases, contracts, servitudes and other agreements forming a part of the
Property, to the extent the same cover or otherwise relate to the Property,  are
in full force and effect, and Mortgagor agrees to so maintain them in full force
and effect.  All rents,  royalties and other payments due and payable under such
leases,  contracts,  servitudes  and other  agreements,  or under the  Permitted
Encumbrances,  or  otherwise  attendant  to the  ownership  or  operation of the
Property,  have  been,  and will  continue  to be,  properly  and  timely  paid.
Mortgagor  is not in  default  with  respect  to  Mortgagor's  obligations  (and
Mortgagor  is not aware of any default by any third  party with  respect to such
third party's  obligations) under such leases,  contracts,  servitudes and other
agreements,  or under the Permitted Encumbrances,  or otherwise attendant to the
ownership  or operation of any part of the  Property,  where such default  could
adversely  affect the  ownership or operation of the  Property;  Mortgagor  will
fulfill all such obligations  coming due in the future.  There are no situations
where  Mortgagor is aware that a contingent  liability may exist to account on a
basis  less  favorable  to  Mortgagor  than on the basis on which  Mortgagor  is
currently accounting.

                                      -7-



     (c)  Sale of Production. No Mortgaged Property is or will become subject to
          ------------------
any  contractual or other  arrangement  (i) whereby payment for production is or
can be  deferred  for a  substantial  period  after  the  month  in  which  such
production is delivered (i.e., for wells in pay status,  in the case of oil, not
in excess of 60 days,  and in the case of gas, not in excess of 90 days, and for
wells not in pay status,  the time period  provided by statute) or (ii)  whereby
payments  are made to  Mortgagor  other than by checks,  drafts,  wire  transfer
advises  or  other  similar  writings,  instruments  or  communications  for the
immediate  payment of money.  Except for production sales contracts,  processing
agreements or  transportation  agreements (or other  agreements  relating to the
marketing of Production)  listed on Exhibit A (in connection  with the Mortgaged
Properties  to where they  relate),  (1) except for the  contracts and Mortgaged
Properties  associated therewith as set forth on Schedule 2.1 (c)A, no Mortgaged
Property is or will become subject to any  contractual or other  arrangement for
the sale,  processing or  transportation  of Production (or otherwise related to
the  marketing of  Production)  which cannot be cancelled on 120 days' (or less)
notice and (ii) all contractual or other  arrangements for the sale,  processing
or  transportation  of  Production  (or  otherwise  related to the  marketing of
Production)  shall be bona fide  transactions,  and except for  contractual  and
other  arrangements  with Four Winds Marketing,  LLC, will be with third parties
not  affiliated  with  Mortgagor,  and shall,  with respect to all contracts and
other  arrangements  be at the best price (and on the best terms) then available
(such price shall,  in the case of  Production  sales which are subject to price
controls,  be  determined  giving  consideration  to such  fact).  Mortgagor  is
presently  receiving a price for all production from (or  attributable  to) each
Mortgaged Property covered by a production sales contract listed on Exhibit A as
computed  in  accordance  with the  terms of such  contract,  and is not  having
deliveries of production from such Mortgaged  Property  curtailed  substantially
below such  property's  delivery  capacity.  Neither  Mortgagor,  nor any of its
predecessors in title, has received prepayments (including,  but not limited to,
payments  for gas  not  taken  pursuant  to  "take  or  pay"  or  other  similar
arrangements) for any oil, gas or other hydrocarbons  produced or to be produced
from the  Mortgaged  Properties  after the date  hereof,  and  Mortgagor  hereby
covenants not to enter into any such advance or prepayment  arrangements whereby
it accepts consideration for oil, gas or other hydrocarbons not yet produced. No
Mortgaged  Property  is or will  become  subject  to any  "take or pay" or other
similar  arrangement  (i)  which  can be  satisfied  in  whole or in part by the
production or transportation of gas from other properties or (ii) as a result of
which  production from the Mortgaged  Properties may be required to be delivered
to one or more third parties without payment (or without full payment)  therefor
as a result of payments  made,  or other  actions  taken,  with respect to other
properties.  To the best of Mortgagor's knowledge,  the gas imbalances set forth
in Schedule 7.19 of the Credit Agreement  reflects the gas balancing position of
the Mortgaged  Properties as of January 27, 2003. Except as otherwise  disclosed
to Agent in writing,  as of December  31, 2001,  there is no Mortgaged  Property
with respect to which  Mortgagor,  or its  predecessors in title,  has, prior to
such date, taken more ("overproduced"), or less ("underproduced"),  gas from the
lands  covered  thereby (or pooled or  unitized  therewith)  than its  ownership
interest in such Mortgaged Property would entitle it to take which has resulted,
on  such  date,  in  Mortgagor  being  materially   overproduced  or  materially
underproduced with respect to such Mortgaged Property.  Mortgagor will not after
the date hereof  become  "overproduced"  (as above  defined) with respect to any
well  on the  Mortgaged  Properties  (or on any  unit  in  which  the  Mortgaged
Properties  participate),  in an amount in  excess of  Mortgagor's  share of gas
produced from such well during the preceding four calendar months.  No Mortgaged
Property is or will become  subject to a gas balancing  arrangement  under which

                                      -8-



one or more third parties may take a portion of the production  attributable  to
such Mortgaged  Property without payment (or without full payment) therefor as a
result of production  having been taken from, or as a result of other actions or
inactions with respect to, other properties. No Mortgaged Property is subject at
the  present  time to any  regulatory  refund  obligation  and,  to the  best of
Mortgagor's knowledge, no facts exist which might cause the same to be imposed.

     (d)  Condition of Personal or Movable  Property. The equipment,  inventory,
          ------------------------------------------
improvements,  fixtures,  goods and  other  tangible  personal/movable  property
forming a part of the Property are and will remain (and with respect to Property
not operated by Mortgagor, to the best of Mortgagor's knowledge, such equipment,
inventory,  fixtures, goods and other tangible personal/movable property are and
will remain) in good repair and  condition  and are and will be adequate for the
normal operation of the Property in accordance with prudent industry  standards;
all of such Property is, and will remain,  located on the Mortgaged  Properties,
except  for  that  portion  thereof  which  is or  shall  be  located  elsewhere
(including  that usually  located on the Mortgaged  Properties  but  temporarily
located  elsewhere) in the course of the normal  operation of the  Property,  or
which is hereafter sold or otherwise  disposed of as permitted  under the Credit
Agreement.

     (e)  Operation of Mortgaged Properties. The Mortgaged Properties,  and with
          ---------------------------------
respect to  Mortgaged  Properties  not  operated  by  Mortgagor,  to the best of
Mortgagor's knowledge,  such non-operated Mortgaged Properties,  (and properties
unitized  therewith)  are being  (and,  to the extent  the same could  adversely
affect the  ownership or operation of the  Mortgaged  Properties  after the date
hereof, have in the past been), and hereafter will be, maintained,  operated and
developed in a good and workmanlike  manner, in accordance with prudent industry
standards and in conformity with all applicable laws and all rules,  regulations
and  orders  of all duly  constituted  authorities  having  jurisdiction  and in
conformity with all oil, gas and/or other mineral leases and other contracts and
agreements  forming a part of the Property and in conformity  with the Permitted
Encumbrances;  specifically  in this  connection,  (i) no Mortgaged  Property is
subject to having  allowable  production after the date hereof reduced below the
full and regular allowable (including the maximum permissible tolerance) because
of any  overproduction  (whether  or not the same was  permissible  at the time)
prior to the date  hereof and (ii) none of the wells  located  on the  Mortgaged
Properties (or properties  unitized  therewith) are or will be deviated from the
vertical more than the maximum permitted by applicable laws, regulations,  rules
and orders,  and such wells are, and will remain,  bottomed  under and producing
from,  with the well bores wholly within,  the Mortgaged  Properties (or, in the
case  of  wells  located  on  properties  unitized   therewith,   such  unitized
properties). There are no wells listed on Schedule I hereto ("Schedule I Wells")
being redrilled, deepened, plugged back or reworked, and no other operations are
being  conducted for which consent is required  under the  applicable  operating
agreement  (or which are other than normal  operation  of existing  wells on the
Mortgaged Properties);  except as otherwise disclosed to Agent in writing, there
are no  proposals in excess of $500,000 net to  Mortgagor's  interest  currently
outstanding  (whether  made by  Mortgagor  or by any other  party) to  re-drill,
deepen,  plug  back,  or  rework  Schedule  I Wells,  or to  conduct  any  other
operations  under the applicable  joint operating  agreement,  or to abandon any
Schedule I Wells  (nor are there any such  proposals  which  have been  approved
either by  Mortgagor or any other  party,  with respect to which the  operations
covered thereby have not been commenced). Except as otherwise disclosed to Agent
in writing,  there are no dry holes, or otherwise inactive wells, located on the
Mortgaged  Properties  or on lands  pooled  or  unitized  therewith  (including,
without  limitation,  any wells  which  would,  if  located  in  Texas,  require

                                      -9-



compliance  with Railroad  Commission  Rule 14(b)(2)) that in the aggregate will
cost  more  than  $500,000,  net to  Mortgagor's  interest  and  net of  salvage
proceeds, to plug and abandon,  except for wells that have been properly plugged
and  abandoned.  Mortgagor  has, and will have in the future,  all  governmental
licenses and permits  necessary or  appropriate to own and operate the Property;
Mortgagor  has not  received  notice of any  violations  in  respect of any such
licenses or permits.

     (f)  Sale or Disposal.Mortgagor will not, without the prior written consent
          ----------------
of Agent, sell, exchange,  lease, transfer, or otherwise dispose of any part of,
or  interest  in,  the  Property  other  than (i)  sales,  transfers  and  other
dispositions of machinery,  equipment and other personal/  movable  property and
fixtures made in connection with a release, surrender or abandonment of a lease,
(ii) sales,  transfers and other dispositions of machinery,  equipment and other
personal/movable  property and fixtures in connection  with the abandonment of a
well, (iii) sales, transfers and other dispositions of machinery,  equipment and
other  personal/movable  property and fixtures  which are (A) obsolete for their
intended  purpose  and  disposed  of in the  ordinary  course of business or (B)
replaced by articles of at least equal  suitability and value owned by Mortgagor
free and clear of all liens except this Mortgage and the Permitted Encumbrances,
(iv) sales of Production  which are made in the ordinary  course of business and
in compliance  with Section 2.1(c) hereof;  provided that nothing in clause (iv)
shall  be  construed  as  limiting  Agent's  rights  under  Article  III of this
Mortgage, and (v) sales, transfers and other dispositions of oil and gas leases,
but only to the  extent  such  sale,  transfer  or other  disposition  is in the
ordinary  course of business and does not  materially  and adversely  affect the
value of the Property in the aggregate. In the event and during the continuation
of a default (as  hereinafter  defined),  Mortgagor  shall at all times keep the
Property and its proceeds separate and distinct from other property of Mortgagor
and shall keep accurate and complete records of the Property and its proceeds.

     (g)  Suits and Claims. Except as  otherwise  disclosed to Agent in writing,
          ----------------
there are no Suits, actions, claims, investigations,  inquiries,  proceedings or
demands  pending (or. to the best of Mortgagor's  knowledge,  threatened)  which
affect the Properties  (including,  without  limitation,  any which challenge or
otherwise  pertain to Mortgagor's  title to the  Properties)  and no judicial or
administrative  actions,  suits  or  proceedings  pending  (or,  to the  best of
Mortgagor's  knowledge,  threatened)  against  Mortgagor.   Notwithstanding  the
foregoing,  Mortgagor's  representation  in this Section with respect to pending
suits, actions, claims, investigations,  inquiries, proceedings or demands which
affect  Properties which are not operated by Mortgagor,  except those pertaining
to Mortgagor's  title to such  non-operated  Properties,  will be limited to the
best of Mortgagor's knowledge.

     (h)  Environmental.
          -------------

          (A) Current  Status.  The  Property  (and with respect to Property not
              ---------------
     operated  by  Mortgagor,  to  the  best  of  Mortgagor's  knowledge,   such
     non-operated  Property)  and  Mortgagor  are not in material  violation  of
     Applicable  Environmental Laws (below defined), or subject to any existing,
     pending or, to the best knowledge of Mortgagor, threatened investigation or
     inquiry by any  governmental  authority  or any other  person under or with
     respect to  Applicable  Environmental  Laws,  or  subject  to any  remedial
     obligations under Applicable Environmental Laws, and are in compliance with
     all permits and licenses required under Applicable  Environmental Laws, and

                                      -10-



     this  representation  will  continue  to  be  true  and  correct  following
     disclosure  to the  applicable  governmental  authorities  of all  relevant
     facts, conditions and circumstances, if any, pertaining to the Property and
     Mortgagor.  "Applicable Environmental Laws" shall mean any applicable laws,
     orders, rules, or regulations  (including,  without limitation,  the common
     law) pertaining to safety, health or the environment, as such laws, orders,
     rules or regulations  now exist or are hereafter  enacted  and/or  amended.
     Applicable   Environmental   Laws   include,   without   limitation,    the
     Comprehensive  Environmental Response,  Compensation,  and Liability Act of
     1980, as amended by the Superfund  Amendments  and  Reauthorization  Act of
     1986 (as amended,  hereinafter called "CERCLA"),  the Resource Conservation
     and Recovery Act of 1976, as amended by the Used Oil Recycling Act of 1980,
     the Solid Waste  Disposal Act  Amendments  of 1980,  and the  Hazardous and
     Solid Waste Amendments of 1984 (as amended,  hereinafter called "RCRA") and
     applicable  state  and  local  law).  Mortgagor  undertook,  at the time of
     acquisition  of the  Property,  all  appropriate  inquiry into the previous
     ownership  and uses of the  Property  consistent  with good  commercial  or
     customary practice. Mortgagor has taken all commercial and reasonable steps
     necessary to determine and has determined  that no hazardous  substances or
     solid wastes have been disposed of or otherwise  released at, into, upon or
     under the Property.  The use which  Mortgagor  makes and intends to make of
     the Property will not result in the use, treatment,  storage or disposal or
     other release of any hazardous  substance or solid waste at, into,  upon or
     under  the  Property,   except  such  usage,   and  temporary   storage  in
     anticipation  of usage,  as is in the  ordinary  course of business  and in
     compliance  with  Applicable   Environmental  Laws.  The  terms  "hazardous
     substance"  and "release" as used in this Mortgage  shall have the meanings
     specified  in  CERCLA,  and the terms  "solid  waste"  and  "disposal"  (or
     "disposed")  shall have the meanings  specified in RCRA;  provided,  in the
     event either  CERCLA or RCRA is amended so as to broaden the meaning of any
     term defined  thereby,  such broader meaning shall apply  subsequent to the
     effective date of such amendment and provided  further,  to the extent that
     the laws of the  states  in which  the  Mortgaged  Properties  are  located
     establish a meaning for "hazardous substance," "release," "solid waste," or
     "disposal"  which is broader than that  specified in either CERCLA or RCRA,
     such broader meaning shall apply.  The "Associated  Property' (as such term
     is hereinafter defined) is not in violation of any Applicable Environmental
     Laws for which  Mortgagor  or its  predecessors  in the  Property  would be
     responsible.  The term "Associated Property" as used in this Mortgage shall
     mean any and all interests in and to (and or carved out of) the lands which
     are  described or referred to in Exhibit A hereto,  or which are  otherwise
     described in any of the oil, gas and/or mineral leases or other instruments
     described in or referred to in such Exhibit A, whether or not such property
     interests are owned by Mortgagor.

          (B) Future  Performance.  Mortgagor  will use its best  efforts not to
              -------------------
     cause or permit the Property or the Associated  Property or Mortgagor to be
     in material  violation  of, or do  anything  or permit  anything to be done
     which will subject the Property or the Associated  Property to any material
     remedial  obligations  under,  or result  in  material  noncompliance  with
     applicable permits and licenses under, any Applicable  Environmental  Laws,
     assuming  disclosure  to the  applicable  governmental  authorities  of all
     relevant facts,  conditions and  circumstances,  if any,  pertaining to the

                                      -11-



     Property or the  Associated  Property and Mortgagor  will  promptly  notify
     Agent in writing of any  existing,  pending  or, to the best  knowledge  of
     Mortgagor,  threatened  investigation,   claim,  suit  or  inquiry  by  any
     governmental  authority  or any person in  connection  with any  Applicable
     Environmental  Laws, provided that, with respect to Properties not operated
     by Mortgagor,  Mortgagor shall notify Agent of any investigations,  claims,
     suits or inquiries,  whether  existing,  pending,  or threatened,  of which
     Mortgagor becomes aware. Mortgagor will take all steps reasonably necessary
     to  determine  that no  hazardous  substances  or solid  wastes  have  been
     disposed of or otherwise  released on or to the Property or the  Associated
     Property. Mortgagor will use commercial and reasonable efforts not to cause
     or permit the disposal or other release of any hazardous substance or solid
     waste at, into,  upon or under the Property or the Associated  Property and
     covenants  and agrees to keep or cause the Property  and/or the  Associated
     Property to be kept free of any hazardous  substance or solid waste (except
     such use, and temporary  storage in  anticipation of use, as is required in
     the ordinary  course of business,  all while in compliance  with Applicable
     Environmental Laws), and to remove the same (or if removal is prohibited by
     law, to take whatever action is required by law) promptly upon discovery at
     its sole expense.  Upon Agent's  reasonable  request,  at any time and from
     time to time during the existence of this Mortgage,  Mortgagor will provide
     at Mortgagor's  sole expense an inspection or audit of the Property and the
     Associated  Property from an  engineering  or  consulting  firm approved by
     Agent, indicating the presence or absence of hazardous substances and solid
     waste on the Property  and/or the Associated  Property and compliance  with
     Applicable Environmental Laws. In the event of a violation,  Mortgagor will
     diligently  work  to  cure  such  violation,   including  remediation,   if
     necessary,  and so long as Mortgagor diligently  prosecutes efforts to cure
     the violation, Mortgagor will not be in breach of this provision.

     (i)  Not Abandon  Wells; Participate  in  Operations.  Mortgagor  will not,
          -----------------------------------------------
without prior written consent of Agent,  abandon,  or consent to the abandonment
of, any well  producing from the Mortgaged  Properties  (or properties  unitized
therewith)  so long as such well is capable (or is subject to being made capable
through  drilling,  reworking or other operations which it would be commercially
feasible to conduct)  of  producing  oil,  gas, or other  hydrocarbons  or other
minerals in commercial  quantities (as determined without considering the effect
of this  Mortgage).  In the event and  during  the  continuation  of a  default,
Mortgagor  will not,  without  prior  written  consent  of  Agent,  elect not to
participate in a proposed operation on the Mortgaged Properties where the effect
of such  election  would be the  forfeiture  either  temporarily  (i.e.  until a
certain sum of money is received out of the forfeited  interest) or  permanently
of any material interest in the Mortgaged Properties.

     (j)  Defense of Mortgage.If the validity or priority of this Mortgage or of
          -------------------
any rights, titles, liens or security interests created or evidenced hereby with
respect to the  Property or any part  thereof or the title of  Mortgagor  to the
Property  shall be endangered  or  questioned  or shall be attacked  directly or
indirectly or if any legal  proceedings  are instituted  against  Mortgagor with
respect thereto,  Mortgagor will give prompt written notice thereof to Agent and
at Mortgagor's own cost and expense will diligently  endeavor to cure any defect
that may be developed or claimed,  and will take all  necessary and proper steps
for the defense of such legal  proceedings,  including,  but not limited to, the
employment of counsel,  the prosecution or defense of litigation and the release
or discharge  of all adverse  claims,  and Trustee and Agent,  or either of them
(whether or not named as parties to legal proceedings with respect thereto), are

                                      -12



hereby  authorized  and  empowered  to take  such  additional  steps as in their
judgment and  discretion  may be necessary or proper for the defense of any such
legal proceedings or the protection of the validity or priority of this Mortgage
and the  rights,  titles,  liens and  security  interests  created or  evidenced
hereby,  including but not limited to the employment of independent counsel, the
prosecution or defense of litigation, the compromise or discharge of any adverse
claims made with respect to the Property,  the purchase of any tax title and the
removal of prior liens or security interests, and all reasonable expenditures so
made of every kind and character shall be a demand  obligation (which obligation
Mortgagor  hereby  expressly  promises  to pay) owing by  Mortgagor  to Agent or
Trustee  (as the case may be) and shall  bear  interest  from the date  expended
until paid at the rate described in Section 2.3 hereof,  and the party incurring
such expenses  shall be subrogated  to all rights of the person  receiving  such
payment.

     (k)  Fees  and  Expenses;  Indemnity.  Mortgagor  will  pay all  reasonable
          -------------------------------
appraisal fees, recording fees, taxes, brokerage fees and commissions,  abstract
and other  records  search  fees,  attorneys'  fees and  expenses  and all other
reasonable costs and expenses of every character  incurred by Mortgagor or Agent
or any Lender in connection  with the closing of the loan or loans  evidenced by
the Loan Documents and any and all amendments,  supplements or  modifications to
such loan transaction or transactions.  Mortgagor will reimburse Trustee,  Agent
and each Lender (for purposes of this paragraph,  the terms  "Trustee",  "Agent"
and "Lender"  shall include the  directors,  officers,  partners,  employees and
agents  of  Trustee,  Agent or any  Lender,  respectively,  and any  persons  or
entities owned or controlled by or affiliated with Trustee, Agent or any Lender,
respectively) for all  expenditures,  including  reasonable  attorneys' fees and
expenses, incurred or expended in connection with (i) the breach by Mortgagor of
any  covenant,  agreement  or  condition  contained  herein or in any other Loan
Document,  (ii) the exercise of any rights and  remedies  hereunder or under any
other Loan Document,  and (iii) the protection of the Property  and/or liens and
security interests therein.  Mortgagor will indemnify and hold harmless Trustee,
Agent and each Lender  from and against  (and will  reimburse  such  indemnified
parties  for) all  claims,  demands,  liabilities,  losses,  damages  (including
without  limitation  consequential  damages),   causes  of  action,   judgments,
penalties,   costs  and  expenses   (including  without  limitation   reasonable
attorneys'  fees and expenses)  which may be imposed upon,  asserted  against or
incurred  or paid by the  Trustee,  the Agent or any  Lender on  account  of, in
connection  with,  or arising  out of (A) any bodily  injury or death or natural
resource,  human health or property damage occurring in, at, into, under or upon
(or,  to the extent  such  injury,  death or damage is related to  Mortgagor  or
Mortgagor's  ownership  or operation  of the  Property,  in the vicinity of) the
Property  through any cause  whatsoever,  (B) any act performed or omitted to be
performed  hereunder or the breach of any representation or warranty herein, (C)
the  exercise  of any  rights  and  remedies  hereunder  or under any other Loan
Document, (D) any transaction,  act, omission, event or circumstance arising out
of or in any way connected  with the Property or with this Mortgage or any other
Loan Document, (E) any violation on or prior to the Release Date (as hereinafter
defined) of any Applicable  Environmental Law, (F) any act,  omission,  event or
circumstance  existing or occurring  on or prior to the Release Date  (including
without  limitation  the  presence on or under the  Property  or the  Associated
Property or release at, into, upon, under or from the Property or the Associated
Property of  hazardous  substances  or solid  wastes  disposed  of or  otherwise
released)  resulting  from or in connection  with the  ownership,  construction,
occupancy,  operation,  use and/or maintenance of the Property or the Associated
Property,  regardless  of  whether  the act,  omission,  event  or  circumstance
constituted a violation of any Applicable  Environmental  Law at the time of its
existence  or  occurrence,  and (G) any and all claims or  proceedings  (whether

                                      -13



brought by private party or  governmental  agencies)  for human  health,  bodily
injury,  property  damage,  abatement  or  remediation.   environmental  damage.
cleanup. mitigation, removal, natural resource damage or impairment or any other
injury or damage resulting from or relating to any hazardous or toxic substance,
solid waste or  contaminated  material  located upon or migrating  into, from or
through the Property or the Associated  Property  (whether or not the release of
such  materials was caused by Mortgagor,  a tenant or subtenant or a prior owner
or tenant or subtenant on the Property or the Associated Property and whether or
not the alleged  liability  is  attributable  to the use,  treatment,  handling,
storage,  generation,  transportation,  removal or disposal  of such  substance,
waste or material or the mere presence of such  substance,  waste or material on
or under the Property or the Associated Property),  which the Trustee and/or the
Agent and/or any Lender may have  liability with respect to due to the making of
the loan or loans  evidenced by any Notes,  the granting of this  Mortgage,  the
exercise of any rights under the Loan Documents, or otherwise.  Agent shall have
the right to compromise and adjust any such claims,  actions and judgments.  and
in addition to the rights to be indemnified as herein provided, all amounts paid
in compromise,  satisfaction or discharge of any such claim, action or judgment,
and all court  costs,  reasonable  attorneys'  fees and other  expenses of every
character expended by Agent, Trustee or any Lender pursuant to the provisions of
this section shall be a demand  obligation  (which  obligation  Mortgagor hereby
expressly  promises  to pay)  owing  by  Mortgagor  to the  applicable  party or
parties.  The  "Release  Date" as used  herein  shall  mean the  earlier  of the
following  two dates:  (i) the date on which the  indebtedness  and  obligations
secured  hereby have been paid and  performed in full, or (ii) the date on which
the lien of this Mortgage is foreclosed or a deed in lieu of such foreclosure is
fully  effective  and  recorded.  WITHOUT  LIMITATION,  IT IS THE  INTENTION  OF
MORTGAGOR AND MORTGAGOR  AGREES THAT THE  FOREGOING  INDEMNITIES  SHALL APPLY TO
EACH INDEMNIFIED  PARTY WITH RESPECT TO CLAIMS,  DEMANDS,  LIABILITIES,  LOSSES,
DAMAGES, CAUSES OF ACTION, JUDGMENTS,  PENALTIES,  COSTS AND EXPENSES (INCLUDING
WITHOUT  LIMITATION  REASONABLE  ATTORNEYS'  FEES) WHICH IN WHOLE OR IN PART ARE
CAUSED BY OR ARISE OUT OF THE NEGLIGENCE OF SUCH (AND/OR ANY OTHER)  INDEMNIFIED
PARTY. However,  such indemnities shall not apply to any particular  indemnified
party  (but  shall  apply to the other  indemnified  parties)  to the extent the
subject  of the  indemnification  is  caused  by or  arises  out  of  the  gross
negligence  or willful  misconduct of such  particular  indemnified  party.  The
foregoing  indemnities  shall not  terminate  upon the Release  Date or upon the
release,  foreclosure or other termination of this Mortgage but will survive the
Release Date, foreclosure of this Mortgage or conveyance in lieu of foreclosure,
and the repayment of the secured  indebtedness  and the discharge and release of
this Mortgage and the other  documents  evidencing  and/or  securing the secured
indebtedness.  Any amount to be paid  hereunder by  Mortgagor to Agent,  Trustee
and/or  any  Lender  shall be a demand  obligation  owing  by  Mortgagor  to the
applicable  party  or  parties  and  shall  be  subject  to and  covered  by the
provisions of Section 2.3 hereof.

     (l)  Insurance.  Mortgagor  will keep (and with  respect  to  Property  not
          ---------
operated  by  Mortgagor,  will use its best  efforts  to keep)  such part of the
Property which is of an insurable  nature and of a character  usually insured by
persons  operating  similar  properties,  insured with  companies of  recognized
responsibility  satisfactory  to Agent and in such amounts as are  acceptable to
Agent (and in the  absence of  specification  of such  amounts by Agent,  in the
amount of the full value of such property,  less  reasonable  deductibles not to

                                      -14



exceed deductibles  customary in the industry for similarly situated  businesses
and properties), against loss or damage by fire, casualty and from other hazards
customarily insured against by persons operating similar  properties.  Mortgagor
shall  also  provide  such  other  insurance  as  Agent  may  from  time to time
reasonably  require;  such  coverage to be carried with  companies of recognized
responsibility  satisfactory  to Agent.  All policies  evidencing such insurance
shall contain  clauses  providing that the proceeds  thereof shall be payable to
Agent as its interest  may appear and  providing  that such  policies may not be
cancelled, reduced or otherwise affected without at least thirty (30) days prior
written notice to Agent. Upon request by Agent, Mortgagor shall deliver to Agent
the original policies, evidence of payment of premiums,  certificates evidencing
renewals,  and such other  information  regarding  such  insurance  as Agent may
request.  In the event of any loss under any  insurance  policies  so carried by
Mortgagor,  Agent shall have the right (but not the obligation) to make proof of
loss and collect the same,  and all amounts so received  shall be applied toward
costs,  charges and expenses  (including  reasonable  attorneys'  fees), if any,
incurred in the collection thereof, then to the payment, in the order determined
by Agent in its own  discretion,  of the secured  indebtedness,  and any balance
remaining shall be subject to the order of Mortgagor. Agent is hereby authorized
but not obligated to enforce in its name or in the name of Mortgagor  payment of
any or all of said  policies  or  settle  or  compromise  any  claim in  respect
thereof,  and to collect and make receipts for the proceeds thereof and Agent is
hereby appointed  Mortgagor's agent and attorney-in-fact to endorse any check or
draft payable to Mortgagor in order to collect the proceeds of insurance. In the
event  of  foreclosure  of this  Mortgage,  or  other  transfer  of title to the
Property in extinguishment in whole or in part of the secured indebtedness,  all
right,  title and interest of Mortgagor  in and to such  policies  then in force
concerning the Property and all proceeds payable thereunder shall thereupon vest
in the purchaser at such  foreclosure  or other  transferee in the event of such
other  transfer  of  title.  Mortgagor  shall  at all  times  maintain  adequate
insurance  against its  liability  on account of damages to persons or property,
which  insurance  shall be carried by  companies  of  recognized  responsibility
satisfactory  to Agent,  and shall be for such  amounts and insure  against such
risks as are customary in the industry for  similarly  situated  businesses  and
properties.  Mortgagor shall at all times maintain cost of regaining  control of
well insurance and similar  insurance to the extent customary in the industry in
the pertinent area of operations.

     (m)  Further  Assurances. Mortgagor will, on request of Agent, (i) promptly
          -------------------
correct any defect, error or omission which may be discovered in the contents of
this  Mortgage,  or  in  any  other  Loan  Document,  or  in  the  execution  or
acknowledgment  of this  Mortgage  or any other  Loan  Document;  (ii)  execute,
acknowledge, deliver and record and/or file such further instruments (including,
without  limitation,  further deeds of trust,  mortgages,  security  agreements,
financing statements,  continuation  statements,  and assignments of production,
accounts, funds, contract rights, general intangibles, and proceeds) and do such
further  acts as may be  necessary,  desirable  or  proper  to  carry  out  more
effectively  the purposes of this  Mortgage and the other Loan  Documents and to
more fully identify and subject to the liens and security  interests  hereof any
property  intended to be covered  hereby,  including  specifically,  but without
limitation,   any   renewals,   additions,   substitutions,   replacements,   or
appurtenances to the Property; and (iii) execute, acknowledge, deliver, and file
and/or record any document or instrument  (including  specifically any financing
statement)  desired  by  Agent to  protect  the  lien or the  security  interest
hereunder against the rights or interests of third persons.  Mortgagor shall pay
all costs connected with any of the foregoing.

                                      -15



     (n) Name and Place of Business  and  Formation.  Except as disclosed in the
         ------------------------------------------
Credit Agreement, Mortgagor has not, during the preceding five years, been known
by or used  any  other  corporate  or  partnership,  trade or  fictitious  name.
Mortgagor will not cause or permit any change to be made in its name,  identity,
state of  formation  or  corporate  or  partnership  structure,  or its  federal
employer  identification  number unless  Mortgagor  shall have notified Agent of
such  change at least  thirty  (30)  days  prior to the  effective  date of such
change,  and shall have first taken all action required by Agent for the purpose
of further  perfecting  or  protecting  the liens and security  interests in the
Property  created hereby.  Mortgagor's  exact name is the name set forth in this
Mortgage. Mortgagor's location is as follows:

                  Mortgagor is a registered organization which is organized
                  under the laws of one of the states comprising the United
                  States (e.g. corporation, limited partnership, registered
                  limited liability partnership or limited liability company).
                  Mortgagor is located (as determined pursuant to the UCC) in
                  the state under the laws which it was organized, as follows:

                  Name of Mortgagor                   State of Organization
                  ---------------------------------------------------------

                  Parent                              Delaware
                  Energy                              Delaware
                  Nance                               Montana
                  NPC                                 Colorado

                  Mortgagor's principal place of business and chief executive
                  office, and the place where Mortgagor keeps its books and
                  records concerning the Property (including, particularly, the
                  records with respect to "Production Proceeds", as defined in
                  Section 3.1 hereof, from the Mortgaged Properties) has for the
                  preceding four months, been, and will continue to be (unless
                  Mortgagor notifies Agent of any change in writing at least
                  thirty (30) days prior to the date of such change), the
                  address set forth opposite the signature of Mortgagor to this
                  Mortgage.

     (o)  Not a Foreign  Person. Mortgagor is not a "foreign  person" within the
          ---------------------
meaning of the Internal  Revenue Code of 1986, as amended,  (hereinafter  called
the "Code"), Sections 1445 and 7701 (i.e. Mortgagor is not a non-resident alien,
foreign  corporation,  foreign  partnership,  foreign trust or foreign estate as
those terms are defined in the Code and any regulations promulgated thereunder).

     Section 2.2 Compliance  by  Operator.  As  to  any  part  of the  Mortgaged
                 ------------------------
Properties  which is not a working  interest,  Mortgagor agrees to take all such
commercial and reasonable  action and to exercise all rights and remedies as are
reasonably  available  to  Mortgagor to cause the owner or owners of the working
interest  in such  properties  to  comply  with  the  covenants  and  agreements
contained  herein;  and as to any part of the  Mortgaged  Properties  which is a
working  interest  but  which  is  operated  by a party  other  than  Mortgagor,
Mortgagor  agrees  to take all such  commercial  and  reasonable  action  and to
exercise  all rights and  remedies  as are  reasonably  available  to  Mortgagor
(including,  but not limited to, all rights under any  operating  agreement)  to

                                      -16-



cause  the  party  who is the  operator  of such  property  to  comply  with the
covenants and agreements contained herein.

     Section 2.3 Performance on Mortgagor's  Behalf.  Mortgagor  agrees that, if
                 ----------------------------------
Mortgagor  fails  to  perform  any act or to take  any  action  which  hereunder
Mortgagor  is required to perform or take,  or to pay any money which  hereunder
Mortgagor is required to pay, Agent,  in Mortgagor's  name or its own name, may,
but shall not be obligated to, perform or cause to be performed such act or take
such  action or pay such  money,  and any  expenses so incurred by Agent and any
money so paid by Agent shall be a demand  obligation owing by Mortgagor to Agent
(which  obligation  Mortgagor hereby expressly  promises to pay) and Agent, upon
making such  payment,  shall be  subrogated  to all of the rights of the person,
corporation or body politic receiving such payment. Each amount due and owing by
Mortgagor to Trustee  and/or Agent and/or any Lender  pursuant to this  Mortgage
shall bear interest each day, from the date of such expenditure or payment until
paid, at a rate equal to the rate as provided for past due  principal  under the
Notes (provided that,  should  applicable law provide for a maximum  permissible
rate of  interest  on such  amounts,  such rate shall not be  greater  than such
maximum  permissible  rate);  all such  amounts,  together  with  such  interest
thereon,  shall be a part of the  secured  indebtedness  and shall be secured by
this Mortgage.

                                  ARTICLE III.

                 Assignment of Production, Accounts and Proceeds
                 -----------------------------------------------

     Section 3.1 Assignment of Production.  Mortgagor does hereby absolutely and
                 ------------------------
unconditionally  assign,  transfer  and set over to Agent all  Production  which
accrues to  Mortgagor's  interest in the Mortgaged  Properties,  all proceeds of
such  Production  and all Payments in Lieu of  Production  (herein  collectively
referred to as the  "Production  Proceeds"),  together  with the  immediate  and
continuing  right to collect and receive  such  Production  Proceeds.  Mortgagor
directs and instructs any and all  purchasers of any  Production to pay to Agent
all of the Production Proceeds accruing to Mortgagor's  interest until such time
as  such   purchasers  have  been  furnished  with  evidence  that  all  secured
indebtedness  has been paid and that this Mortgage has been released.  Mortgagor
agrees that no purchasers of the Production  shall have any  responsibility  for
the application of any funds paid to Agent.

     Section 3.2 Effectuating    Payment  of  Production   Proceeds   to  Agent.
                 --------------------------------------------------------------
Independent  of  the  foregoing   provisions  and  authorities  herein  granted,
Mortgagor  agrees to execute and deliver any and all transfer  orders,  division
orders  and  other  instruments  that may be  requested  by Agent or that may be
required by any  purchaser  of any  Production  for the purpose of  effectuating
payment  of the  Production  Proceeds  to  Agent.  If under any  existing  sales
agreements,  other than  division  orders or  transfer  orders,  any  Production
Proceeds  are  required to be paid by the  purchaser  to Mortgagor so that under
such existing  agreements payment cannot be made of such Production  Proceeds to
Agent,  Mortgagor's  interest  in  all  Production  Proceeds  under  such  sales
agreements and in all other Production Proceeds which for any reason may be paid
to  Mortgagor  shall,  when  received by  Mortgagor,  constitute  trust funds in
Mortgagor's  hands  and  shall  be  immediately  paid  over  to  Agent.  Without
limitation upon any of the foregoing,  Mortgagor hereby constitutes and appoints
Agent as Mortgagor's  special attorney in-fact (with full power of substitution,
either  generally or for such periods or purposes as Agent may from time to time

                                      -17



prescribe) in the name, place and stead of Mortgagor to do any and every act and
exercise  any and  every  power  that  Mortgagor  might or could do or  exercise
personally  with respect to all  Production  and  Production  Proceeds (the same
having been  assigned by  Mortgagor  to Agent  pursuant to Section 3.1  hereof),
expressly inclusive, but not limited to, the right, power and authority to:

     (a)  Execute  and  deliver in the name of  Mortgagor  any and all  transfer
orders,  division orders, letters in lieu of transfer orders,  indemnifications,
certificates  and other  instruments  of every  nature that may be  requested or
required by any purchaser of Production from any of the Mortgaged Properties for
the  purposes of  effectuating  payment of the  Production  Proceeds to Agent or
which Agent may otherwise deem necessary or appropriate to effect the intent and
purposes of the assignment contained in Section 3.1; and

     (b) If under any product sales  agreements  other than  division  orders or
transfer  orders,  any  Production  Proceeds  are  required  to be  paid  by the
purchaser to Mortgagor so that under such existing  agreements payment cannot be
made of such Production  Proceeds to Agent, to make, execute and enter into such
sales  agreements  or other  agreements  as are  necessary to direct  Production
Proceeds to be payable to Agent;

giving and granting  unto said  attorney-in-fact  full power and authority to do
and perform any and every act and thing whatsoever necessary and requisite to be
done as fully and to all intents and purposes, as Mortgagor might or could do if
personally  present;   and  Mortgagor  shall  be  bound  thereby  as  fully  and
effectively as if Mortgagor had personally executed,  acknowledged and delivered
any of the  foregoing  certificates  or  documents.  The powers and  authorities
herein conferred upon Agent may be exercised by Agent through any person who, at
the time of the execution of the particular instrument,  is an officer of Agent.
The power of attorney herein conferred is granted for valuable consideration and
hence is coupled  with an  interest  and is  irrevocable  so long as the secured
indebtedness, or any part thereof, shall remain unpaid. All persons dealing with
Agent or any  substitute  shall be fully  protected  in treating  the powers and
authorities  conferred by this  paragraph as continuing in full force and effect
until  advised by Agent that all the secured  indebtedness  is fully and finally
paid.  Agent may,  but shall not be  obligated  to, take such action as it deems
appropriate in an effort to collect the  Production  Proceeds and any reasonable
expenses (including  reasonable attorney's fees) so incurred by Agent shall be a
demand  obligation of Mortgagor  and shall be part of the secured  indebtedness,
and shall bear interest each day, from the date of such  expenditure  or payment
until paid, at the rate described in Section 2.3 hereof.

     Section 3.3 Change of  Purchaser.  To  the  extent a default  has  occurred
                 --------------------
hereunder and is  continuing,  should any person now or hereafter  purchasing or
taking  Production  fail to make  payment  promptly  to Agent of the  Production
Proceeds, Agent shall, subject to then existing contractual  prohibitions,  have
the right to make, or to require  Mortgagor to make, a change of purchaser,  and
the right to  designate  or approve the new  purchaser,  and Agent shall have no
liability or responsibility in connection  therewith so long as ordinary care is
used in making such designation.

     Section 3.4 Application of Production  Proceeds.  So long as no default has
                 -----------------------------------
occurred  hereunder,  the  Production  Proceeds  received  by Agent  during each

                                      -18



calendar month shall on the first business day of the next  succeeding  calendar
month (or, at the option of Agent,  on any earlier  date) be applied by Agent as
follows:

          FIRST,  to the  payment  of all  secured  indebtedness  then  due  and
          -----
     payable, in such manner and order as Agent deems advisable;

          SECOND, to the prepayment of the remainder of the secured indebtedness
          ------
     in such manner and order and to such extent as Agent deems advisable; and

          THIRD, the remainder, if any, of the Production Proceeds shall be paid
          -----
     over to Mortgagor or to  Mortgagor's  order or to such other parties as may
     be entitled thereto by law.

After a default  hereunder has occurred,  all  Production  Proceeds from time to
time in the hands of Agent  shall be  applied  by it toward  the  payment of all
secured indebtedness  (principal,  interest,  attorneys' fees and other fees and
expenses) at such times and in such manner and order and to such extent as Agent
deems advisable.

     Section 3.5 Release  From  Liability;  Indemnification.   Agent   and   its
                 ------------------------------------------
successors  and assigns are hereby  released and absolved from all liability for
failure to enforce  collection  of the  Production  Proceeds  and from all other
responsibility  in connection  therewith,  except the  responsibility of each to
account to Mortgagor for funds actually  received by each.  Mortgagor  agrees to
indemnify and hold  harmless  Agent (for  purposes of this  paragraph,  the term
"Agent" shall include the directors, officers, partners, employees and agents of
Agent and any persons or entities  owned or  controlled  by or  affiliated  with
Agent)  from and  against  all claims,  demands,  liabilities,  losses,  damages
(including  without  limitation   consequential  damages),   causes  of  action,
judgments,   penalties,   costs  and  expenses   (including  without  limitation
reasonable  attorneys'  fees and  expenses)  imposed upon,  asserted  against or
incurred or paid by Agent by reason of the assertion that Agent received, either
before or after  payment  in full of the  secured  indebtedness,  funds from the
production of oil, gas, other  hydrocarbons  or other minerals  claimed by third
persons (and/or funds attributable to sales of production which (i) were made at
prices in excess of the maximum price  permitted by applicable  law or (ii) were
otherwise made in violation of laws, rules,  regulations and/or orders governing
such sales), and Agent shall have the right to defend against any such claims or
actions,  employing  attorneys of its own  selection,  and if not furnished with
indemnity  satisfactory  to it,  Agent  shall have the right to  compromise  and
adjust any such claims, actions and judgments,  and in addition to the rights to
be  indemnified  as herein  provided,  all amounts paid by Agent in  compromise,
satisfaction or discharge of any such claim,  action or judgment,  and all court
costs, reasonable attorneys' fees and other expenses of every character expended
by Agent pursuant to the provisions of this section shall be a demand obligation
(which obligation Mortgagor hereby expressly promises to pay) owing by Mortgagor
to Agent and shall bear interest, from the date expended until paid, at the rate
described in Section 2.3 hereof.  The foregoing  indemnities shall not terminate
upon the Release Date or upon the release,  foreclosure or other  termination of
this Mortgage but will survive the Release Date, foreclosure of this Mortgage or
conveyance in lieu of foreclosure, and the repayment of the secured indebtedness
and  the  discharge  and  release  of this  Mortgage  and  the  other  documents
evidencing and/or securing the secured indebtedness.  WITHOUT LIMITATION,  IT IS
THE INTENTION OF MORTGAGOR AND MORTGAGOR AGREES THAT THE FOREGOING  RELEASES AND

                                      -19



INDEMNITIES  SHALL APPLY TO EACH  INDEMNIFIED  PARTY WITH RESPECT TO ALL CLAIMS,
DEMANDS,   LIABILITIES,    LOSSES,   DAMAGES   (INCLUDING   WITHOUT   LIMITATION
CONSEQUENTIAL  DAMAGES),  CAUSES  OF  ACTION,  JUDGMENTS,  PENALTIES,  COSTS AND
EXPENSES (INCLUDING WITHOUT LIMITATION  REASONABLE ATTORNEYS' FEES AND EXPENSES)
WHICH IN WHOLE OR IN PART ARE CAUSED BY OR ARISE OUT OF THE  NEGLIGENCE  OF SUCH
(AND/OR ANY OTHER) INDEMNIFIED PARTY.  However, such indemnities shall not apply
to any particular  indemnified  party (but shall apply to the other  indemnified
parties) to the extent the subject of the indemnification is caused by or arises
out of the gross negligence or willful misconduct of such particular indemnified
party.

     Section 3.6 Mortgagor's  Absolute  Obligation to Pay Notes.  Nothing herein
                 ----------------------------------------------
contained  shall  detract  from or limit the  obligations  of  Mortgagor to make
prompt payment of the Notes, and any and all other secured indebtedness,  at the
time and in the manner provided herein and in the Loan Documents,  regardless of
whether the Production and Production Proceeds herein assigned are sufficient to
pay same, and the rights under this Article III shall be cumulative of all other
rights under the Loan Documents.

     Section 3.7 Rights Under  Oklahoma Oil and Gas Owners' Lien Act.  Mortgagor
                 ---------------------------------------------------
hereby grants,  sells,  assigns and sets over unto Agent during the term hereof,
all of  Mortgagor's  rights and interests  pursuant to the provisions of the Oil
and Gas Owners' Lien Act (OKLA. STAT. tit. 52, ss.ss. 548.l-548.6 (the "Oklahoma
Act"), hereby vesting in Agent all of Mortgagor's rights as an interest owner to
the continuing  security interest in and lien upon the oil or gas severed or the
proceeds of sale. Agent may, at its option,  file the verified notice of lien in
order to perfect  such lien,  but shall not be obligated to make such filing and
shall not be held liable to  Mortgagor  for any act or omission  pursuant to the
Oklahoma Act.

     Section 3.8 Intentionally Left Blank.
                 ------------------------

     Section 3.9 Rights Under Wyoming Statutes.  Mortgagor hereby appoints Agent
                 -----------------------------
as its  attorney-in-fact  to pursue any and all lien rights of the  Mortgagor to
liens and security  interests in the Mortgaged  Properties  securing  payment of
Production Proceeds attributable to the Mortgaged Properties, including, without
limitation,  those liens and security interests provided for by Section 34.1-9-3
19, Wyoming Statutes Annotated, 1988 Republished Edition (June 1991), as amended
or  recodified.  Mortgagor  further  assigns  to Agent  any and all such  liens,
security  interests,  financing  statements,  or similar  interests of Mortgagor
attributable to its interests in the Mortgaged Properties or Production Proceeds
therefrom arising under or created by statutory provision, judicial decision, or
otherwise.

                                  ARTICLE IV.

                              Remedies Upon Default
                              ---------------------

     Section 4.1 Default. The term "default" as used in this Mortgage shall mean
                 -------
the occurrence of any of the following events:

                                      -20-



     (a) the  occurrence  of an "Event of  Default"  as  defined  in the  Credit
Agreement; or

     (b) the failure of Mortgagor  to make due and punctual  payment of any Note
or of any other secured  indebtedness or of any installment of principal thereof
or  interest  thereon,  or any part  thereof,  as the same shall  become due and
payable (taking into account any applicable  grace period,  if any,  provided in
the Loan  Documents),  whether at a date for payment of a fixed  installment  or
contingent or other payment, or as a result of acceleration, or otherwise; or

     (c) the failure of Mortgagor to pay over to Agent any  Production  Proceeds
which  are  receivable  by Agent  under  this  Mortgage  but  which  are paid to
Mortgagor  rather than Agent  (either as  provided  for in Section 3.2 hereof or
otherwise),  except  Production  Proceeds  paid over to Mortgagor by Agent under
clause THIRD of Section 3.4; or

     (d) the  failure of  Mortgagor  timely and  properly  to  observe,  keep or
perform any covenant,  agreement,  warranty or condition  herein or in any other
Loan Document required to be observed, kept or performed, if such failure is not
remedied  within the applicable  grace period provided for in such Loan Document
or, if such Loan Document  does not provide for such a grace  period,  within 30
days  after  written  notice  and  demand by Agent for the  performance  of such
covenant, agreement, warranty or condition; or

     (e) any representation contained herein (or in any certificate delivered by
Mortgagor in connection  herewith) or contained in any other Loan  Document,  or
otherwise heretofore or hereafter made by or on behalf of Mortgagor, shall prove
to have been false or misleading in any material respect on the date made (or on
the date as of which made); or

     (f) the  occurrence  of a "default"  or "event of  default"  under any Loan
Document  other  than this  Mortgage,  which  default  is not cured  within  the
applicable grace period (if any) provided for in such other Loan Document; or

     (g) Mortgagor  suffers the entry against it of a judgment,  decree or order
for relief by a court of competent  jurisdiction  in an  involuntary  proceeding
commenced  under any applicable  bankruptcy,  insolvency or other similar law of
any  jurisdiction  now or  hereafter  in effect,  including  the  United  States
Bankruptcy  Code,  as from  time  to  time  amended,  or has  such a  proceeding
commenced against it which remains undismissed for a period of 30 days; or

     (h) Mortgagor  commences a voluntary case under any applicable  bankruptcy,
insolvency  or similar  law now or  hereafter  in effect,  including  the United
States Bankruptcy Code, as from time to time amended, or applies for or consents
to the entry of an order for relief in an  involuntary  case under any such law;
or Mortgagor makes a general assignment for the benefit of creditors or fails to
pay (or admits in writing its  inability  to pay) its debts as such debts become
due; or Mortgagor  takes  corporate or other action in furtherance of any of the
foregoing; or

     (i)  Mortgagor  suffers the  appointment  of or taking of  possession  by a
receiver,  liquidator,  assignee,  custodian,  trustee,  sequestrator or similar
official for a substantial part of its assets or for any part of the Property in
a proceeding  brought  against or initiated  by it and (1) such  appointment  or

                                      -21



taking is  neither  made  ineffective  nor  discharged  within 30 days after the
making of such  appointment  or within 30 days  after such  taking,  or (2) such
appointment  or taking is  consented  to,  requested  by,  or  acquiesced  to by
Mortgagor; or

     (j)  Mortgagor  suffers a writ or  warrant  of  attachment  or any  similar
process to be issued by any court  against  all or any  substantial  part of its
assets or any part of the  Property,  and such writ or warrant of  attachment or
any similar  process is not stayed or released within 30 days after the entry or
levy thereof or after any stay is vacated or set aside; or

     (k) Any of the events referred to above in subsections (g), (h), (i) or (j)
shall occur with respect to any guarantor of the secured  indebtedness and shall
not be remedied  within the  applicable  grace period (if any) set forth in such
subsections.

     Section 4.2 Acceleration of Secured Indebtedness.  Upon the occurrence of a
                 ------------------------------------
default  described in subsection (g), (h), (i) or (j) of Section 4.1 above,  all
of the secured  indebtedness  shall  thereupon be  immediately  due and payable,
without presentment,  demand, protest, notice of protest,  declaration or notice
of  acceleration  or intention to accelerate,  putting the Mortgagor in default,
dishonor, notice of dishonor or any other notice or declaration of any kind, all
of which are  hereby  expressly  waived by  Mortgagor,  and the liens  evidenced
hereby  shall be subject to  foreclosure  in any manner  provided  for herein or
provided  for by law as Agent may  elect.  During the  continuance  of any other
default, Agent at any time and from time to time may without notice to Mortgagor
or any other person declare any or all of the secured  indebtedness  immediately
due and payable and all such secured indebtedness shall thereupon be immediately
due and  payable,  without  presentment,  demand,  protest,  notice of  protest,
declaration or notice of  acceleration  or intention to accelerate,  putting the
Mortgagor  in  default,  dishonor,  notice of  dishonor  or any other  notice or
declaration of any kind, all of which are hereby  expressly waived by Mortgagor,
and the liens  evidenced  hereby shall be subject to  foreclosure  in any manner
provided for herein or provided for by law as Agent may elect.

     Section 4.3 Pre-Foreclosure  Remedies. Upon the occurrence of a default, or
                 -------------------------
any event or circumstance which, with the lapse of time or the giving of notice,
or both,  would  constitute a default  hereunder,  and  following  any period to
attempt to cure such default, if any, provided in the Credit Agreement, Agent is
authorized,   prior  or  subsequent  to  the   institution  of  any  foreclosure
proceedings,  to enter  upon the  Property,  or any  part  thereof,  and to take
possession of the Property and all books and records  relating  thereto,  and to
exercise without  interference from Mortgagor any and all rights which Mortgagor
has  with  respect  to the  management,  possession,  operation,  protection  or
preservation of the Property. If necessary to obtain the possession provided for
above, Agent may invoke any and all remedies to dispossess Mortgagor, including,
without limitation, summary proceeding or restraining order, Mortgagor agrees to
peacefully  surrender  possession  of the  Property  upon  default.  All  costs,
expenses  and  liabilities  of every  character  incurred by Agent in  managing,
operating, maintaining, protecting or preserving the Property shall constitute a
demand obligation (which obligation  Mortgagor hereby expressly promises to pay)
owing by Mortgagor  to Agent and shall bear  interest  from date of  expenditure
until paid at the rate  described  in Section  2.3  hereof,  all of which  shall
constitute  a portion of the secured  indebtedness  and shall be secured by this
Mortgage  and by any other  instrument  securing  the secured  indebtedness.  In
connection  with any action taken by Agent  pursuant to this Section 4.3,  AGENT
SHALL NOT BE LIABLE FOR ANY LOSS  SUSTAINED BY MORTGAGOR  RESULTING FROM ANY ACT
OR OMISSION OF AGENT (INCLUDING AGENT'S OWN NEGLIGENCE) IN MANAGING THE PROPERTY

                                      -22-



UNLESS  SUCH LOSS IS CAUSED BY THE WILLFUL  MISCONDUCT  OR GROSS  NEGLIGENCE  OF
AGENT, nor shall Agent be obligated to perform or discharge any obligation, duty
or liability  of Mortgagor  arising  under any  agreement  forming a part of the
Property  or arising  under any  Permitted  Encumbrance  or  otherwise  arising.
Mortgagor  hereby assents to, ratifies and confirms any and all actions of Agent
with respect to the Property taken under this Section 4.3.

     Section 4.4 Foreclosure.
                 -----------

     (a) Upon the  occurrence of a default,  Trustee is authorized and empowered
and it shall be Trustee's  special duty at the request of Agent to sell the Deed
of Trust Mortgaged Properties, or any part thereof, as an entirety or in parcels
as Agent may elect, at such place or places and otherwise in the manner and upon
such  notice  as  may be  required  by  law  or,  in  the  absence  of any  such
requirement, as Trustee may deem appropriate. If Trustee shall have given notice
of sale hereunder,  any successor or substitute Trustee thereafter appointed may
complete the sale and the conveyance of the property pursuant thereto as if such
notice had been given by the  successor or  substitute  Trustee  conducting  the
sale. Cumulative of the foregoing and the other provisions of this Section 4.4:

          (i) As to any  portion  of the  Deed  of  Trust  Mortgaged  Properties
     located in the State of Texas (or within the  offshore  area over which the
     United States of America asserts jurisdiction and to which the laws of such
     state are  applicable  with  respect to this  Mortgage  and/or the liens or
     security  interests created hereby),  such sales of all or any part of such
     Deed of Trust Mortgaged  Properties shall be conducted at the courthouse of
     any  county  (whether  or not the  counties  in  which  such  Deed of Trust
     Mortgaged  Properties are located are  contiguous) in the State of Texas in
     which any part of such Deed of Trust  Mortgaged  Properties  is situated or
     which lies shoreward of any Deed of Trust Mortgaged  Property (i.e., to the
     extent a particular Deed of Trust  Mortgaged  Property lies offshore within
     the  reasonable   projected   seaward  extension  of  the  relevant  county
     boundary), at public venue to the highest bidder for cash between the hours
     of ten o'clock a.m. and four o'clock p.m. on the first Tuesday in any month
     or at such other  place,  time and date as provided by the  statutes of the
     State of Texas then in force  governing  sales of real estate  under powers
     conferred  by deed of  trust,  after  having  given  notice of such sale in
     accordance with such statutes.

          A POWER OF SALE HAS BEEN GRANTED IN THIS MORTGAGE. A POWER OF SALE MAY
          ----------------------------------------------------------------------
     ALLOW TRUSTEE TO TAKE THE MORTGAGED  PROPERTIES AND SELL THEM WITHOUT GOING
     ---------------------------------------------------------------------------
     TO COURT IN A  FORECLOSURE  ACTION  UPON  DEFAULT BY  MORTGAGOR  UNDER THIS
     ---------------------------------------------------------------------------
     MORTGAGE.
     ---------

     (b) Upon the occurrence of a default, this Mortgage may be foreclosed as to
the Other Mortgaged Properties,  or any part thereof, in any manner permitted by
applicable  law.  Cumulative of the  foregoing and the other  provisions of this
Section 4.4:

                                      -23



          (i) As to Other Mortgaged Properties located in the State of Louisiana
     (or  within  the  offshore  area over  which the  United  States of America
     asserts  jurisdiction  and to which the laws of such  state are  applicable
     with  respect  to this  Mortgage  and/or  the liens or  security  interests
     created hereby), Agent may foreclose this Mortgage by executory process, or
     any other process,  subject to, and on the terms and conditions required or
     permitted by,  applicable law, and shall have the right to appoint a keeper
     of such Other Mortgaged Properties.

          (ii)  As to  Other  Mortgaged  Properties  located  in  the  State  of
     Oklahoma, Mortgagor hereby confers on Agent the power to sell the Mortgaged
     Properties  in  accordance   with  the  Oklahoma  Power  of  Sale  Mortgage
     Foreclosure  Act (OKLA.  STAT.  tit. 46, ss.ss.  41-49),  as the same maybe
     amended from time to time.  Mortgagor  hereby  represents and warrants that
     this Mortgage  transaction does not involve a consumer loan as said term is
     defined in Section 3-104 of Title 14A of the Oklahoma  Statutes,  that this
     Mortgage  does not  secure  an  extension  of  credit  made  primarily  for
     agricultural  purposes as defined in paragraph 4 of Section  1-301 of Title
     14A of the Oklahoma  Statutes,  and that this Mortgage is not a mortgage on
     the Mortgagor's homestead.

               A POWER OF SALE HAS BEEN  GRANTED  IN THIS  MORTGAGE.  A POWER OF
               -----------------------------------------------------------------
          SALE MAY ALLOW AGENT TO TAKE THE  MORTGAGED  PROPERTIES  AND SELL THEM
          ----------------------------------------------------------------------
          WITHOUT  GOING  TO COURT  IN A  FORECLOSURE  ACTION  UPON  DEFAULT  BY
          ----------------------------------------------------------------------
          MORTGAGOR UNDER THIS MORTGAGE.
          ------------------------------

     (c) Upon the  occurrence  of a default,  Agent may  exercise  its rights of
enforcement with respect to the Collateral under the Texas Business and Commerce
Code,  as amended,  the  Louisiana  Commercial  Laws,  as  amended,  the Uniform
Commercial  Code of the State of  Oklahoma,  as  amended,  or under the  Uniform
Commercial  Code or any other  statute  in force in any state to the  extent the
same is applicable law.  Cumulative of the foregoing and the other provisions of
this Section 4.4:

          (i) To the extent permitted by law, Agent may enter upon the Mortgaged
     Properties or otherwise upon  Mortgagor's  premises to take  possession of,
     assemble and collect the Collateral or to render it unusable; and

          (ii) Agent may require  Mortgagor to assemble the  Collateral and make
     it available at a place Agent  designates  which is mutually  convenient to
     allow Agent to take possession or dispose of the Collateral; and

          (iii) Written  notice mailed to Mortgagor as provided  herein at least
     five (5) days prior to the date of public sale of the  Collateral  or prior
     to the date after which private sale of the  Collateral  will be made shall
     constitute reasonable notice; and

          (iv) in the  event  of a  foreclosure  of the  liens  and/or  security
     interests  evidenced hereby, the Collateral,  or any part thereof,  and the
     Mortgaged Properties,  or any part thereof, may, at the option of Agent, be
     sold, as a whole or in parts,  together or separately  (including,  without

                                      -24-



     limitation,  where a  portion  of the  Mortgaged  Properties  is sold,  the
     Collateral related thereto may be sold in connection therewith); and

          (v) the  expenses of sale  provided for in clause FIRST of Section 4.7
     shall include the reasonable  expenses of retaking the  Collateral,  or any
     part  thereof,  holding the same and  preparing  the same for sale or other
     disposition; and

          (vi) should,  under this  subsection,  the  Collateral  be disposed of
     other than by sale, any proceeds of such disposition shall be treated under
     Section 4.7 as if the same were sales proceeds; and

          (vii) as to the Collateral located in or otherwise subject to the laws
     of the State of Louisiana,  Agent may foreclose this Mortgage as a security
     agreement  affecting  the  Collateral  by executory  process,  or any other
     process,  subject to, and on the terms and conditions required or permitted
     by  applicable  law,  and shall  have the right to appoint a keeper of such
     Collateral.

     (d) To the extent  permitted by applicable  law, the sale hereunder of less
than the whole of the  Property  shall not  exhaust  the  powers of sale  herein
granted or the right to judicial  foreclosure,  and successive sale or sales may
be made until the whole of the Property  shall be sold,  and, if the proceeds of
such  sale of less  than  the  whole  of the  Property  shall  be less  than the
aggregate of the indebtedness  secured hereby and the expense of conducting such
sale, this Mortgage and the liens and security  interests hereof shall remain in
full force and effect as to the unsold portion of the Property just as though no
sale had been made; provided, however, that Mortgagor shall never have any right
to  require  the sale of less than the whole of the  Property.  In the event any
sale  hereunder is not  completed or is defective in the opinion of Agent,  such
sale shall not  exhaust  the powers of sale  hereunder  or the right to judicial
foreclosure,  and Agent shall have the right to cause a subsequent sale or sales
to be made.  Any sale may be  adjourned  by  announcement  at the time and place
appointed for such sale without further notice except as may be required by law.
The Trustee or his successor or substitute,  and the Agent acting under power of
sale,  may appoint or delegate  any one or more  persons as agent to perform any
act or acts  necessary  or incident to any sale held by it  (including,  without
limitation,  the  posting  of  notices  and  the  conduct  of  sale),  and  such
appointment  need not be in writing or recorded,  Any and all statements of fact
or other recitals made in any deed or deeds,  or other  instruments of transfer,
given in connection with a sale as to nonpayment of the secured  indebtedness or
as to the  occurrence of any default,  or as to all of the secured  indebtedness
having been declared to be due and payable,  or as to the request to sell, or as
to notice of time,  place and terms of sale and the properties to be sold having
been duly given,  or, with respect to any sale by the Trustee,  or any successor
or substitute trustee, as to the refusal, failure or inability to act of Trustee
or any substitute or successor  trustee or the  appointment of any substitute or
successor trustee,  or as to any other act or thing having been duly done, shall
be taken as prima  facie  evidence  of the  truth  of the  facts so  stated  and
recited.  Notwithstanding  any  reference  herein  to the  Notes  or the  Credit
Agreement or any other Loan  Document,  all persons  dealing with the  Mortgaged
Properties  shall be entitled to rely on any document,  or  certificate,  of the
Agent as to the occurrence of an event,  such as an Event of Default,  and shall
not be charged with or forced to review any  provision of any other  document to
determine the accuracy thereof.  With respect to any sale held in foreclosure of
the liens and/or security  interests  covered hereby,  it shall not be necessary
for the Trustee,  Agent,  any public officer acting under  execution or order of

                                      -25-



the court or any other party to have  physically  present or  constructively  in
his/her  or its  possession,  either at the time of or prior to such  sale,  the
Property or any part thereof.

     (e) As to Property now or hereafter located in, or otherwise subject to the
laws  of,  the  State  of   Louisiana,   Mortgagor   acknowledges   the  secured
indebtedness,  whether now existing or to arise  hereafter,  and for  Mortgagor,
Mortgagor's heirs, devisees,  personal representatives,  successors and assigns,
hereby  confesses  judgment for the full amount of the secured  indebtedness  in
favor of the Lender.  Mortgagor  further  agrees that the Agent may cause all or
any part of the  Property  to be seized and sold after due  process of law,  the
Mortgagor  waiving  the  benefit  of all laws or parts of laws  relative  to the
appraisement of property seized and sold under executory  process or other legal
process, and consenting that all or any part of the Property may be sold without
appraisement,  either in its entirety or in lots and  parcels,  as the Agent may
determine,  to the highest  bidder for cash or on such terms as the plaintiff in
such  proceedings  may  direct.  Mortgagor  hereby  waives  (i) the  benefit  of
appraisement  provided  for in  articles  2332,  2336,  2723,  and  2724  of the
Louisiana Code of Civil  Procedure and all other laws  conferring the same; (ii)
the demand and three (3) days notice of demand as provided in articles  2639 and
2721 of the  Louisiana  Code of Civil  Procedure;  (iii) the  notice of  seizure
provided for in articles 2293 and 2721 of the Louisiana Code of Civil Procedure;
(iv) the three (3) days  delay  provided  for in  articles  2331 and 2722 of the
Louisiana Code of Civil  Procedure;  and (v) all other laws providing  rights of
notice,  demand,  appraisement,  or delay.  Mortgagor  expressly  authorizes and
agrees  that Agent  shall  have the right to  appoint a keeper of such  Property
pursuant to the terms and  provisions  of La. R.S.  9:5131 et seq.  and La. R.S.
9:5136 et seq., which keeper may be the Agent, any agent or employee thereof, or
any other person,  firm, or  corporation.  Compensation  for the services of the
keeper is hereby  fixed at five  percent  (5%) of the  amount due or sued for or
claimed or sought to be protected,  preserved, or enforced in the proceeding for
the  recognition  or  enforcement  of this  Mortgage and shall be secured by the
liens and security interests of this Mortgage.

     Section 4.5 Effective  as  Mortgage.  As  to the  Deed of  Trust  Mortgaged
                 -----------------------
Properties,  this instrument  shall be effective as a mortgage as well as a deed
of trust and upon the  occurrence  of a default may be foreclosed as to the Deed
of Trust Mortgaged  Properties,  or any portion thereof, in any manner permitted
by  applicable  law,  and any  foreclosure  suit may be brought by Trustee or by
Agent.  To the  extent,  if any,  required  to cause  this  instrument  to be so
effective as a mortgage as well as a deed of trust,  Mortgagor  hereby mortgages
the Deed of Trust  Mortgaged  Properties  to Agent.  In the event a  foreclosure
hereunder as to the Deed of Trust  Mortgaged  Properties,  or any part  thereof,
shall be commenced by Trustee, or his substitute or successor,  Agent may at any
time before the sale of such properties  direct Trustee to abandon the sale, and
may  then  institute  suit  for  the  foreclosure  of this  Mortgage  as to such
properties.  It is  agreed  that  if  Agent  should  institute  a suit  for  the
foreclosure of this Mortgage,  Agent may at any time before the entry of a final
judgment in said suit dismiss the same, and require  Trustee,  its substitute or
successor, to sell the Deed of Trust Mortgaged Properties,  or any part thereof,
in accordance with the provisions of this Mortgage.

     Section 4.6 Receiver.  In addition to all other  remedies  herein  provided
                 --------
for,  Mortgagor  agrees that,  upon the  occurrence of a default or any event or
circumstance  which,  with the lapse of time or the giving of  notice,  or both,
would  constitute  a  default  hereunder,  Agent  shall as a matter  of right be

                                      -26-



entitled to the  appointment  of a receiver or receivers  for all or any part of
the  Property,  whether  such  receivership  be incident to a proposed  sale (or
sales) of such  property or  otherwise,  and without  regard to the value of the
Property or the solvency of any person or persons  liable for the payment of the
indebtedness   secured  hereby,   and  Mortgagor  does  hereby  consent  to  the
appointment  of such receiver or receivers,  waives any and all defenses to such
appointment,  and agrees not to oppose any  application  therefor by Agent,  and
agrees that such appointment  shall in no manner impair,  prejudice or otherwise
affect the rights of Agent under Article III hereof.  Mortgagor expressly waives
notice of a hearing for  appointment of a receiver and the necessity for bond or
an  accounting  by the  receiver.  Nothing  herein is to be construed to deprive
Agent or any  Lender  of any other  right,  remedy  or  privilege  it may now or
hereafter have under the law to have a receiver appointed. Any money advanced by
Agent in  connection  with any such  receivership  shall be a demand  obligation
(which obligation Mortgagor hereby expressly promises to pay) owing by Mortgagor
to Agent and shall bear  interest,  from the date of making such  advancement by
Agent until paid, at the rate described in Section 2.3 hereof.

     Section  4.7  Proceeds  of  Foreclosure.  The  proceeds of any sale held in
                   -------------------------
foreclosure of the liens and/or  security  interests  evidenced  hereby shall be
applied:

          FIRST, to the payment of all necessary costs and expenses  incident to
          -----
     such  foreclosure  sale,  including  but not limited to all court costs and
     charges of every character in the event  foreclosed by suit or any judicial
     proceeding and including but not limited to a reasonable fee to the Trustee
     if such sale was made by the Trustee acting under the provisions of Section
     4.4(a) and including but not limited to the compensation of the keeper,  if
     any;

          SECOND,  to  the  payment  of  the  secured  indebtedness   (including
          ------
     specifically without limitation the principal, interest and attorneys' fees
     due and unpaid on the Notes and the  amounts  due and unpaid and owed under
     this Mortgage) in such manner and order as Agent may elect; and

          THIRD,  the  remainder,  if any  there  shall  be,  shall  be  paid to
          -----
     Mortgagor, or to Mortgagor's heirs, devisees,  representatives,  successors
     or assigns, or such other persons as may be entitled thereto by law.

     Section 4.8 Lender as Purchaser.  Any Lender shall have the right to become
                 -------------------
the  purchaser  at any sale held in  foreclosure  of the liens  and/or  security
interests  evidenced  hereby,  and any Lender  purchasing at any such sale shall
have the right to credit upon the amount of the bid made therefor, to the extent
necessary to satisfy such bid, the secured indebtedness owing to such Lender, or
if such  Lender  holds  less  than all of such  indebtedness,  the pro rata part
thereof  owing to such Lender,  accounting  to all other  Lenders not joining in
such  bid in cash for the  portion  of such  bid or bids  apportionable  to such
non-bidding Lender or Lenders.

     Section 4.9 Foreclosure  as to Matured  Debt.   Upon  the  occurrence  of a
                 --------------------------------
default,  Agent shall have the right to proceed  with  foreclosure  of the liens
and/or security interests  evidenced hereby without declaring the entire secured
indebtedness  due,  and in such  event,  any such  foreclosure  sale may be made
subject to the unmatured part of the secured  indebtedness  and shall not in any
manner affect the  unmatured  part of the secured  indebtedness,  but as to such

                                      -27-



unmatured  part,  this  Mortgage  shall  remain in full force and effect just as
though no sale had been  made.  The  proceeds  of such sale  shall be applied as
provided in Section 4.7 except that the amount paid under clause SECOND  thereof
shall be only the matured portion of the secured  indebtedness  and any proceeds
of such  sale in excess  of those  provided  for in  clauses  FIRST  and  SECOND
(modified as provided  above) shall be applied as provided in clause  SECOND AND
THIRD of  Section  3.4  hereof.  Several  sales  may be made  hereunder  without
exhausting the right of sale for any unmatured part of the secured indebtedness.

     Section 4.10 Remedies  Cumulative.   All remedies  herein  provided for are
                  --------------------
cumulative of each other and of all other remedies  existing at law or in equity
and are cumulative of any and all other remedies  provided for in any other Loan
Document, and, in addition to the remedies herein provided, there shall continue
to be available all such other remedies as may now or hereafter  exist at law or
in equity for the collection of the secured  indebtedness and the enforcement of
the covenants herein and the foreclosure of the liens and/or security  interests
evidenced  hereby,  and the resort to any remedy provided for hereunder or under
any such  other Loan  Document  or  provided  for by law shall not  prevent  the
concurrent or subsequent employment of any other appropriate remedy or remedies.

     Section 4.11 Discretion  as to Security.   Agent may resort to any security
                  --------------------------
given by this Mortgage or to any other security now existing or hereafter  given
to secure the payment of the secured  indebtedness,  in whole or in part, and in
such  portions  and in such  order  as may  seem  best to  Agent in its sole and
uncontrolled discretion,  and any such action shall not in any way be considered
as a  waiver  of  any of the  rights,  benefits,  liens  or  security  interests
evidenced by this Mortgage.

     Section 4.12 Mortgagor's  Waiver of Certain  Rights.   To  the full  extent
                  --------------------------------------
Mortgagor may do so, Mortgagor agrees that Mortgagor will not at any time insist
upon, plead,  claim or take the benefit or advantage of any law now or hereafter
in  force  providing  for  any  appraisement,   valuation,  stay,  extension  or
redemption,   and  Mortgagor,   for  Mortgagor,   Mortgagor's  heirs,  devisees,
representatives,  successors  and  assigns,  and for any  and all  persons  ever
claiming any interest in the  Property,  to the extent  permitted by  applicable
law, hereby waives and releases all rights of appraisement,  valuation,  stay of
execution, redemption, notice of intention to mature or declare due the whole of
the secured indebtedness,  notice of election to mature or declare due the whole
of the  secured  indebtedness  and all  rights  to a  marshaling  of  assets  of
Mortgagor,  including the Property,  or to a sale in inverse order of alienation
in the  event of  foreclosure  of the liens  and/or  security  interests  hereby
created.  Mortgagor shall not have or assert any right under any statute or rule
of law  pertaining  to the  marshaling  of  assets,  sale in  inverse  order  of
alienation,  the  exemption  of  homestead,  the  administration  of  estates of
decedents, or other matters whatever to defeat, reduce or affect the right under
the terms of this  Mortgage to a sale of the Property for the  collection of the
secured  indebtedness  without any prior or different resort for collection,  or
the  right  under the  terms of this  Mortgage  to the  payment  of the  secured
indebtedness  out of the proceeds of sale of the Properly in preference to every
other  claimant  whatever.  If any law  referred  to in this  section and now in
force,  of which  Mortgagor or  Mortgagor's  heirs,  devisees,  representatives,
successors  or  assigns  or any  other  persons  claiming  any  interest  in the
Mortgaged  Properties  or the  Collateral  might  take  advantage  despite  this
section, shall hereafter be repealed or cease to be in force, such law shall not
thereafter be deemed to preclude the application of this section.

                                      -28



     Section 4.13 Mortgagor as Tenant Post-Foreclosure.  In the event there is a
                  ------------------------------------
foreclosure sale hereunder and at the time of such sale Mortgagor or Mortgagor's
heirs,  devisees,  representatives,  successors  or assigns or any other persons
claiming  any  interest  in the  Property  by,  through or under  Mortgagor  are
occupying  or using  the  Property,  or any  part  thereof,  each and all  shall
immediately become the tenant of the purchaser at such sale, which tenancy shall
be a  tenancy  from day to day,  terminable  at the will of either  landlord  or
tenant,  at a  reasonable  rental per day based  upon the value of the  property
occupied,  such rental to be due daily to the purchaser. To the extent permitted
by  applicable  law,  the  purchaser  at such sale  shall,  notwithstanding  any
language  herein  apparently  to the  contrary,  have the sole  option to demand
immediate  possession following the sale or to permit the occupants to remain as
tenants at will.  In the event the tenant fails to surrender  possession of said
property upon demand,  the purchaser shall be entitled to institute and maintain
a summary  action for possession of the property (such as an action for forcible
entry and detainer) in any court having jurisdiction.

     Section 4.14 Waiver of Oklahoma Appraisement. As to Property situated in or
                  -------------------------------
otherwise  subject  to the laws of the State of  Oklahoma,  appraisement  of the
Property  is hereby  waived (or not) at the option of Agent,  such  option to be
exercised at the time judgment is rendered in any  foreclosure  hereof or at any
time prior thereto.

                                   ARTICLE V.

                                  Miscellaneous
                                  -------------

     Section 5.1 Scope of  Mortgage.  This   Mortgage  is a deed of  trust  and
                 ------------------
mortgage  of both  real/immovable  and  personal/movable  property,  a  security
agreement, a financing statement and an assignment, and also covers proceeds and
fixtures.

     Section 5.2 Effective as a Financing Statement.  This Mortgage, among other
                 ----------------------------------
things,  covers  goods which are or are to become  fixtures  related to the real
property  described herein,  and covers  as-extracted  collateral related to the
real property described herein.  This Mortgage shall be effective as a financing
statement  (i) filed as a fixture  filing with respect to all fixtures  included
within the Property,  (ii) covering as-extracted  collateral with respect to all
as-extracted  collateral  included  within  the  Property  (including,   without
limitation, all oil, gas, other minerals and other substances of value which may
be  extracted  from the earth and all  accounts  arising  out of the sale at the
wellhead or minehead  thereof),  and (iii)  covering  all other  Property.  This
Mortgage  is to be filed for record in the  real/immovable  property  records of
each county or parish where any part of the Mortgaged  Properties is situated or
which lies shoreward of any Mortgaged  Property (i.e., to the extent a Mortgaged
Property lies offshore  within the projected  seaward  extension of the relevant
county or parish boundaries), and may also be filed in the offices of the Bureau
of Land Management,  the Minerals Management Service, the General Land Office or
any relevant federal, state, local or tribal agency (or any successor agencies).
The mailing  address of Mortgagor  is the address of Mortgagor  set forth at the
end of this Mortgage and the address of Agent from which information  concerning
the  security  interests  hereunder  may be obtained is the address of Agent set
forth at the end of this Mortgage.  Nothing contained in this paragraph shall be
construed  to  limit  the  scope of this  Mortgage  nor its  effectiveness  as a
financing statement covering any type of Property.

                                      -29-



     Section 5.3 Reproduction of Mortgage as Financing Statement;  Authorization
                 ---------------------------------------------------------------
to  File.  A  carbon,  photographic,  facsimile  or other  reproduction  of this
- --------
Mortgage  or of any  financing  statement  relating  to this  Mortgage  shall be
sufficient as a financing statement for any purpose.  Without limiting any other
provision  herein,  Mortgagor hereby  authorizes Agent to file, in any filing or
recording  office,  one  or  more  financing   statements  and  any  renewal  or
continuation  statements thereof,  describing the Property,  including,  without
limitation,  a  financing  statement  covering  "all  assets of  Mortgagor,  all
proceeds therefrom and all rights and privileges with respect thereto."

     Section 5.4 Notice to  Account  Debtors.   In  addition   to,  but  without
                 ---------------------------
limitation of, the rights granted in Article III hereof,  Agent may, at any time
after a default has occurred that is continuing,  notify the account  debtors or
obligors  of any  accounts,  chattel  paper,  negotiable  instruments  or  other
evidences of indebtedness included in the Collateral to pay Agent directly.

     Section 5.5 Waivers. Agent may at any time and from time to time in writing
                 -------
waive  compliance by Mortgagor with any covenant herein made by Mortgagor to the
extent and in the manner  specified in such writing,  or consent to  Mortgagor's
doing  any act  which  hereunder  Mortgagor  is  prohibited  from  doing,  or to
Mortgagor's  failing to do any act which hereunder  Mortgagor is required to do,
to the extent and in the manner  specified in such writing,  or release any part
of the Property or any interest therein or any Production Proceeds from the lien
and  security  interest of this  Mortgage,  without the joinder of Trustee.  Any
party liable, either directly or indirectly, for the secured indebtedness or for
any covenant  herein or in any other Loan  Document may be released  from all or
any part of such obligations without impairing or releasing the liability of any
other party. No such act shall in any way impair any rights or powers  hereunder
except to the extent specifically agreed to in such writing.

     Section 5.6 No  Impairment  of Security.  The lien,  security  interest and
                 ---------------------------
other  security  rights  hereunder  shall  not be  impaired  by any  indulgence,
moratorium or release which may be granted,  including,  but not limited to, any
renewal,  extension  or  modification  which may be granted  with respect to any
secured indebtedness, or any surrender, compromise, release, renewal, extension,
exchange  or  substitution  which  maybe  granted  in  respect  of the  Property
(including without limitation Production  Proceeds),  or any part thereof or any
interest  therein,  or any  release  or  indulgence  granted  to  any  endorser,
guarantor or surety of any secured indebtedness.

     Section 5.7 Acts Not Constituting Waiver. Any default may be waived without
                 ----------------------------
waiving  any other  prior or  subsequent  default.  Any  default may be remedied
without waiving the default remedied.  Neither failure to exercise, nor delay in
exercising,  any right, power or remedy upon any default shall be construed as a
waiver of such  default or as a waiver of the right to exercise  any such right,
power or remedy at a later  date.  No single or partial  exercise  of any right,
power or remedy  hereunder shall exhaust the same or shall preclude any other or
further exercise thereof, and every such right, power or remedy hereunder may be
exercised at any time and from time to time,  No  modification  or waiver of any
provision  hereof nor consent to any departure by Mortgagor  therefrom  shall in
any event be  effective  unless the same shall be in writing and signed by Agent
and then  such  waiver  or  consent  shall  be  effective  only in the  specific
instances,  for the purpose for which given and to the extent therein specified.
No  notice to nor  demand  on  Mortgagor  in any case  shall of  itself  entitle
Mortgagor  to any  other  or  further  notice  or  demand  in  similar  or other

                                      -30-



circumstances.  Acceptance of any payment in an amount less than the amount then
due on any secured  indebtedness  shall be deemed an  acceptance on account only
and shall not in any way excuse the existence of a default hereunder.

     Section 5.8 Mortgagor's  Successors.  In  the  event the  ownership  of the
                 -----------------------
Property or any part thereof  becomes  vested in a person other than  Mortgagor,
then, without notice to Mortgagor,  such successor or successors in interest may
be dealt with, with reference to this Mortgage and to the  indebtedness  secured
hereby,  in the same manner as with  Mortgagor,  without in any way vitiating or
discharging   Mortgagor's   liability  hereunder  or  for  the  payment  of  the
indebtedness  or performance of the obligations  secured hereby.  No transfer of
the Property,  no  forbearance,  and no extension of the time for the payment of
the  indebtedness  secured hereby shall operate to release,  discharge,  modify,
change or affect,  in whole or in part, the liability of Mortgagor  hereunder or
for the payment of the  indebtedness or performance of the  obligations  secured
hereby or the liability of any other person  hereunder or for the payment of the
indebtedness secured hereby.

     Section 5.9 Place of Payment.  All secured  indebtedness which may be owing
                 ----------------
hereunder at any time by Mortgagor  shall be payable at the place  designated in
the Credit Agreement (or if no such designation is made, at the address of Agent
indicated  at the end of this  Mortgage),  or at such  other  place as Agent may
designate in writing.

     Section 5.10 Subrogation to Existing Liens.  To the extent that proceeds of
                  -----------------------------
the Notes are used to pay indebtedness secured by any outstanding lien, security
interest,  charge or prior encumbrance against the Property,  such proceeds have
been advanced at  Mortgagor's  request,  and the party or parties  advancing the
same shall be  subrogated  to any and all rights,  security  interests and liens
owned by any owner or  holder of such  outstanding  liens,  security  interests,
charges or encumbrances, irrespective of whether said liens, security interests,
charges or encumbrances  are released,  and it is expressly  understood that, in
consideration of the payment of such  indebtedness,  Mortgagor hereby waives and
releases  all demands and causes of action for offsets and payments to, upon and
in connection with the said indebtedness.

     Section 5.11 Application of Payments to Certain  Indebtedness.  If any part
                  ------------------------------------------------
of the secured  indebtedness  cannot be lawfully  secured by this Mortgage or if
any part of the  Property  cannot be lawfully  subject to the lien and  security
interest hereof to the full extent of such indebtedness,  then all payments made
shall be applied on said indebtedness first in discharge of that portion thereof
which is not secured by this Mortgage.

     Section 5.12 Compliance  With Usury Laws.   It is the intent of  Mortgagor,
                  ---------------------------
Lender  and all  other  parties  to the Loan  Documents  to  contract  in strict
compliance with applicable usury law from time to time in effect. In furtherance
thereof,  it is  stipulated  and  agreed  that none of the terms and  provisions
contained  herein or in the other  Loan  Documents  shall ever be  construed  to
create a  contract  to pay,  for the use,  forbearance  or  detention  of money,
interest in excess of the maximum amount of interest  permitted to be charged by
applicable law from time to time in effect.

     Section 5.13 Substitute Trustee. The Trustee may resign by an instrument in
                  ------------------
writing  addressed  to Agent,  or  Trustee  may be  removed  at any time with or

                                      -31-



without  cause by an  instrument  in writing  executed by Agent.  In case of the
death,  resignation,  removal,  or  disqualification  of Trustee,  or if for any
reason  Agent  shall deem it  desirable  to appoint a  substitute  or  successor
trustee  to act  instead  of the  herein  named  trustee  or any  substitute  or
successor trustee,  then Agent shall have the right and is hereby authorized and
empowered to appoint a successor trustee, or a substitute trustee, without other
formality than  appointment and designation in writing executed by Agent and the
authority  hereby  conferred  shall extend to the appointment of other successor
and substitute trustees  successively until the indebtedness  secured hereby has
been paid in full,  or until the  Property is sold  hereunder.  In the event the
secured  indebtedness is owned by more than one person or entity,  the holder or
holders of not less than a majority  in the  amount of such  indebtedness  shall
also have the right and  authority  to make the  appointment  of a successor  or
substitute  trustee  as  provided  for in the  preceding  sentence  or to remove
Trustee as provided in the first sentence of this section,  Such appointment and
designation  by Agent shall be full  evidence of the right and authority to make
the  same and of all  facts  therein  recited.  If  Agent  is a  corporation  or
association and such appointment is executed in its behalf by an officer of such
corporation or association,  such appointment shall be conclusively  presumed to
be executed with  authority and shall be valid and  sufficient  without proof of
any action by the board of directors or any superior  officer of the corporation
or  association.   Agent  may  act  through  an  agent  or  attorney-in-fact  in
substituting trustees.  Upon the making of any such appointment and designation,
all of the estate and title of Trustee in the Deed of Trust Mortgaged Properties
shall vest in the named  successor or substitute  Trustee and such  successor or
substitute shall thereupon succeed to, and shall hold, possess and execute,  all
the rights,  powers,  privileges,  immunities  and duties herein  conferred upon
Trustee; but nevertheless, upon the written request of Agent or of the successor
or substitute  Trustee,  the Trustee ceasing to act shall execute and deliver an
instrument  transferring  to such  successor  or  substitute  Trustee all of the
estate and title in the Deed of Trust  Mortgaged  Properties  of the  Trustee so
ceasing to act, together with all the rights, powers, privileges, immunities and
duties herein  conferred upon the Trustee,  and shall duly assign,  transfer and
deliver any of the properties and moneys held by said Trustee  hereunder to said
successor or  substitute  Trustee,  All  references  herein to Trustee  shall be
deemed to refer to Trustee (including any successor or substitute  appointed and
designated as herein provided) from time to time acting hereunder.

     Section 5.14 No Liability for Trustee.  THE TRUSTEE SHALL NOT BE LIABLE FOR
                  ------------------------
ANY ERROR OF  JUDGMENT  OR ACT DONE BY TRUSTEE IN GOOD  FAITH,  OR BE  OTHERWISE
RESPONSIBLE  OR  ACCOUNTABLE  UNDER  ANY  CIRCUMSTANCES  WHATSOEVER  (INCLUDING,
WITHOUT  LIMITATION,  THE  TRUSTEE'S  NEGLIGENCE),  EXCEPT FOR  TRUSTEE'S  GROSS
NEGLIGENCE  OR WILLFUL  MISCONDUCT.  The Trustee shall have the right to rely on
any instrument, document or signature authorizing or supporting any action taken
or  proposed to be taken by the  Trustee  hereunder,  believed by the Trustee in
good faith to be genuine.  All moneys  received by Trustee shall,  until used or
applied as herein  provided,  be held in trust for the  purposes  for which they
were  received,  but need not be  segregated in any manner from any other moneys
(except to the extent  required by law), and Trustee shall be under no liability
for interest on any moneys received by him hereunder.  Mortgagor hereby ratifies
and confirms any and all acts which the herein named Trustee or its successor or
successors,  substitute  or  substitutes,  shall do lawfully  by virtue  hereof.
Mortgagor  will reimburse  Trustee for, and indemnify and save Trustee  harmless
against, any and all liability and expenses (including attorneys fees) which may
be  incurred  by  Trustee  in the  performance  of  his  duties.  The  foregoing

                                      -32-



indemnities  shall  not  terminate  upon  the  release,   foreclosure  or  other
termination of this Mortgage but will survive such release,  termination  and/or
foreclosure  of this  Mortgage,  or conveyance in lieu of  foreclosure,  and the
repayment  of the secured  indebtedness  and the  discharge  and release of this
Mortgage  and  the  other  documents  evidencing  and/or  securing  the  secured
indebtedness. Any amount to be paid hereunder by Mortgagor to Trustee shall be a
demand  obligation  owing by  Mortgagor  to Trustee  and shall be subject to and
covered by the provisions of Section 2.3 hereof.

     Section 5.15 Release of Mortgage.   If all of the secured  indebtedness  be
                  -------------------
paid as the same becomes due and payable,  all other  requirements of the Credit
Agreement are satisfied and all of the covenants,  warranties,  undertakings and
agreements  made in this  Mortgage  are kept and  performed,  and if neither the
Mortgagor  nor any Lender is bound to the other or to any third person to permit
any obligation or secured indebtedness to be incurred then or thereafter,  then,
upon sixty (60) days prior written  notice (or such lesser number of days as may
be mandated by applicable  law), the Mortgagor may request that this Mortgage be
terminated.  Upon such  termination  the  Mortgagor  may further  request that a
written act of release of this Mortgage be provided  (except this Mortgage shall
be reinstated to the extent expressly  provided  herein,  and will continue with
respect to indemnification  and other rights which are to continue following the
release hereof).  Agent agrees to deliver such an act of release (subject to the
foregoing  limitation),  all at the cost and  expense of the  Mortgagor,  within
thirty (30) days (or such lesser number of days as may be mandated by applicable
law) of receiving such request unless Agent in good faith,  has cause to believe
that   Mortgagor  is  not   entitled  to  a   termination   of  this   Mortgage.
Notwithstanding  the  foregoing,  it  is  understood  and  agreed  that  certain
indemnifications,  and other  rights,  which  are  provided  herein to  continue
following the release  hereof,  shall  continue in effect  notwithstanding  such
release;  and  provided  that if any  payment  to Lender,  or Agent,  is held to
constitute a preference or a voidable transfer under applicable state or federal
laws or if for any other  reason  Lender,  or Agent,  is required to refund such
payment to the payor  thereof or to pay the amount  thereof to any third  party,
this Mortgage shall be reinstated to the extent of such payment or payments.

     Section 5.16 Notices. All notices,  requests,  consents,  demands and other
                  -------
communications  required or permitted hereunder shall be in writing and shall be
deemed  sufficiently  given or furnished if delivered by personal  delivery,  by
telecopy,  by delivery  service  with proof of  delivery,  or by  registered  or
certified United States mail, postage prepaid, at the addresses specified at the
end of this Mortgage  (unless  changed by similar notice in writing given by the
particular  party  whose  address  is  to  be  changed).   Any  such  notice  or
communication  shall be deemed to have  been  given (a) in the case of  personal
delivery or delivery service,  as of the date of first attempted delivery at the
address and in the manner  provided  herein,  (b) in the case of telecopy,  upon
receipt,  and (c) in the case of  registered  or certified  United  States mail,
three days after deposit in the mail. Notwithstanding the foregoing, or anything
else in the Loan Documents which may appear to the contrary, any notice given in
connection  with a foreclosure of the liens and/or  security  interests  created
hereunder,  or otherwise in connection with the exercise by Agent, any Lender or
Trustee of their  respective  rights hereunder or under any other Loan Document,
which is given in a manner permitted by applicable law shall  constitute  proper
notice; without limitation of the foregoing,  notice given in a form required or
permitted  by statute  shall (as to the  portion of the  Property  to which such
statute is applicable) constitute proper notice.

                                      -33-



     Section 5.17 Invalidity of Certain  Provisions.  A  determination  that any
                  ---------------------------------
provision  of this  Mortgage is  unenforceable  or invalid  shall not affect the
enforceability or validity of any other provision and the determination that the
application of any provision of this Mortgage to any person or  circumstance  is
illegal or unenforceable shall not affect the enforceability or validity of such
provision as it may apply to other persons or circumstances.

     Section 5.18 Gender;  Titles.  Within  this  Mortgage,  words of any gender
                  ---------------
shall be held and  construed  to  include  any  other  gender,  and words in the
singular  number shall be held and  construed to include the plural,  unless the
context   otherwise   requires.   Titles  appearing  at  the  beginning  of  any
subdivisions hereof are for convenience only, do not constitute any part of such
subdivisions,  and shall be disregarded in construing the language  contained in
such subdivisions.

     Section 5.19 Recording.  Mortgagor  will   cause   this  Mortgage  and  all
                  ---------
amendments and supplements thereto and substitutions  therefor and all financing
statements and continuation  statements relating thereto to be recorded,  filed,
re-recorded  and  refiled in such  manner and in such places as Trustee or Agent
shall reasonably request and will pay all such recording,  filing,  re-recording
and refiling taxes, fees and other charges.

     Section 5.20 Reporting Compliance.  Mortgagor agrees to comply with any and
                  --------------------
all reporting requirements  applicable to the transaction evidenced by the Notes
and secured by this Mortgage which are set forth in any law, statute, ordinance,
rule,  regulation,  order or determination of any  governmental  authority,  and
further  agrees  upon  request of Agent to furnish  Agent with  evidence of such
compliance.

     Section 5.21 Certain Consents.  Except where otherwise  expressly  provided
                  ----------------
herein, in any instance hereunder where the approval, consent or the exercise of
judgment  of Agent or any Lender is  required,  the  granting  or denial of such
approval or consent and the exercise of such  judgment  shall be within the sole
discretion  of such party,  and such party  shall not,  for any reason or to any
extent,  be required to grant such approval or consent or exercise such judgment
in any particular manner, regardless of the reasonableness of either the request
or the judgment of such party.

     Section 5.22 Certain Obligations of Mortgagor. Without limiting Mortgagor's
                  --------------------------------
obligations  hereunder,  Mortgagor's  liability  hereunder and the  indebtedness
secured hereby shall extend to and include all post petition interest, expenses,
and other  duties  and  liabilities  with  respect  to  Mortgagor's  obligations
hereunder  which  would  be  owed  but  for  the  fact  that  the  same  may  be
unenforceable  due to the existence of a bankruptcy,  reorganization  or similar
proceeding.

     Section 5.23 Authority of Agent.  The persons  constituting  Lender may, by
                  ------------------
agreement  among  them,  provide  for and  regulate  the  exercise of rights and
remedies  hereunder,  but,  unless and until modified to the contrary in writing
signed by all such  persons and  recorded in the same  counties  and parishes as
this  Mortgage  is  recorded,  (i) all  persons  other  than  Mortgagor  and its
affiliates  shall  be  entitled  to rely  on the  releases,  waivers,  consents,
approvals,   notifications  and  other  acts  (including,   without  limitation,
appointment of substitute or successor trustee,  or trustees,  hereunder and the
bidding  in of all or any part of the  secured  indebtedness  held by any one or
more  Lenders,  whether the same be  conducted  under the  provisions  hereof or
otherwise) of Agent,  without  inquiry into any such agreements or the existence
of required consent or approval of any persons  constituting  Lender and without

                                      -34-



the joinder of any party other than Agent in such releases,  waivers,  consents,
approvals, notifications or other acts and (ii) all notices, requests, consents,
demands and other communications required or permitted to be given hereunder may
be given to Agent.

     Section 5.24 Counterparts.  This   Mortgage  may  be  executed  in  several
                  ------------
counterparts,  all of  which  are  identical,  except  that,  (a) to  facilitate
recordation,  certain  counterparts  hereof  may  include  only that  portion of
Exhibit A which contains descriptions of the properties located in (or otherwise
subject  to the  recording  or filing  requirements  and/or  protections  of the
recording or filing acts or regulations of) the recording  jurisdiction in which
the particular  counterpart  is to be recorded,  and other portions of Exhibit A
shall be included in such  counterparts  by reference only and (b) Schedule I is
attached only to the master  counterparts hereof being retained by Mortgagor and
Agent, (c) only those counterparts  hereof being retained by Agent and Mortgagor
or otherwise containing counterpart descriptions of Mortgaged Properties located
in (or  otherwise  subject  to  the  recording  or  filing  requirements  and/or
protections  of the  recording  or filing acts or  regulations  of) the State of
Louisiana will have Annex I attached  thereto,  Annex I is included in all other
counterparts  by  reference  only,  and (d) the  execution  of this  Mortgage by
Mortgagor  may  not  be  witnessed  on  those  counterparts   hereof  containing
descriptions of Mortgaged  Properties  located in states where witnesses are not
required and/or encouraged by applicable law. All of such counterparts  together
shall constitute one and the same instrument.

     Section 5.25 Multiple Parties  Constituting  Mortgagor.  Unless the context
                  -----------------------------------------
clearly  indicates  otherwise,  as used in this Mortgage,  "Mortgagor" means the
Mortgagors  named in  Section  1.1  hereof or any of them.  The  obligations  of
Mortgagor hereunder shall be joint and several.

     Section 5.26 Successors  and Assigns.   The terms,  provisions,  covenants,
                  -----------------------
representations,  indemnifications  and conditions  hereof shall be binding upon
Mortgagor,  and the successors and assigns of Mortgagor,  and shall inure to the
benefit  of  Agent,  Trustee  and each  person  constituting  Lender  and  their
respective  successors and assigns,  and shall constitute covenants running with
the  Mortgaged  Properties.  Should  the  agency  under  which  Agent  serves be
terminated,  or otherwise  cease to exist,  Lenders  (including  the  respective
successors and assigns of each person constituting Lender named herein) shall be
deemed to be the  successors  to  Agent.  All  references  in this  Mortgage  to
Mortgagor,  Agent,  Trustee  or  Lenders  shall be  deemed to  include  all such
successors and assigns.

     Section 5.27 FINAL  AGREEMENT OF THE  PARTIES.  THE WRITTEN LOAN  DOCUMENTS
                  --------------------------------------------------------------
REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY
- --------------------------------------------------------------------------------
EVIDENCE  OF  PRIOR.  CONTEMPORANEOUS.  OR  SUBSEQUENT  ORAL  AGREEMENTS  OF THE
- --------------------------------------------------------------------------------
PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.
- --------------------------------------------------------------------

     Section 5.28 CHOICE OF LAW.  WITHOUT  REGARD TO  PRINCIPLES OF CONFLICTS OF
                  -------------
LAW,  THIS  MORTGAGE  SHALL BE  CONSTRUED  AND ENFORCED IN  ACCORDANCE  WITH AND
GOVERNED BY THE LAWS OF THE STATE OF TEXAS  APPLICABLE TO CONTRACTS  MADE AND TO

                                      -35-



BE  PERFORMED  ENTIRELY  WITHIN SUCH STATE AND THE LAWS OF THE UNITED  STATES OF
AMERICA, EXCEPT THAT TO THE EXTENT THAT THE LAW OF A STATE IN WHICH A PORTION OF
THE  PROPERTY IS LOCATED (OR WHICH IS OTHERWISE  APPLICABLE  TO A PORTION OF THE
PROPERTY)  NECESSARILY  OR,  IN THE SOLE  DISCRETION  OF  LENDER,  APPROPRIATELY
GOVERNS WITH  RESPECT TO  PROCEDURAL  AND  SUBSTANTIVE  MATTERS  RELATING TO THE
CREATION,  PERFECTION AND ENFORCEMENT OF THE LIENS, SECURITY INTERESTS AND OTHER
RIGHTS AND REMEDIES OF THE TRUSTEE OR THE LENDER GRANTED HEREIN, THE LAW OF SUCH
STATE SHALL  APPLY AS TO THAT  PORTION OF THE  PROPERTY  LOCATED IN (OR WHICH IS
OTHERWISE SUBJECT TO THE LAWS OF) SUCH STATE.

     Section 5.29 Reliance on  Certificate  or  Statement  of Agent.   All third
                  -------------------------------------------------
parties  may  rely  upon a  certificate  or  statement  of the  Agent  as to the
occurrence of any act or event, including, but not limited to, the occurrence of
a default  hereunder,  or the occurrence of an Event of Default under the Credit
Agreement.

     Section 5.30 Appearance.  Resolutions,  For   purposes  of  Louisiana  law,
                  ----------
including but not limited to the  availability of executory  process,  Mortgagor
has appeared on this date before the undersigned  Notary Public and witnesses in
order to execute this Mortgage.  Mortgagor attaches, as Annex I, to counterparts
hereof  being  recorded  in  Louisiana  certified  resolutions  of its  Board of
Directors authorizing the execution and delivery of this Mortgage.

     Section 5.31 Paraph.  Mortgagor  acknowledges  that no  promissory  note or
                  ------
other  instrument  has been  presented to the  undersigned  Notary  Public to be
paraphed for identification herewith.

     Section 5.32 Acceptance  by Agent.  In accordance  with  the  provisions of
                  --------------------
Louisiana  Civil Code  article  3289,  Agent has  accepted  the  benefits of the
Mortgage without the necessity of execution by Agent.

                         [Signatures Begin on Next Page]





     THUS DONE AND PASSED this 7 day of April, 2005, to be effective, however,
                               -
as of April 7, 2005, in my presence and in the presence of the undersigned
competent witnesses who hereunto sign their names with Mortgagor and me, Notary,
after reading of the whole.


WITNESSES:                      ST. MARY LAND & EXPLORATION
                                COMPANY
/S/ DEBRA J. ARROYO
- -------------------
Name:  Debra J. Arroyo
       ---------------
                                By:  /S/ DAVID W. HONEYFIELD
                                     -----------------------
                                     David W. Honeyfield
/S/ MOLLY DOLTON                     Vice President - Finance, Secretary and
- ----------------                     Treasurer
Name:  Molly Dolton
       ------------

                             /S/ JAMES C. ROBERTSON

                               James C. Robertson
                               ------------------
                                  NOTARY PUBLIC


The address and tax identification number of Parent are:
1776 Lincoln Street, Suite 700
Denver, Colorado 80203
(Denver County)
Taxpayer I.D. No. 41-05 18430

The  address of Agent is:
201 South College Street
8th Floor NC 0680
Charlotte, NC 28288

The addresses of Trustee is:
Jay Chernosky
1001 Fannin Street, Suite 2255
Houston, Texas 77002

This instrument prepared by:
Craig W. Murray
Vinson & Elkins L.L.P.
1001 Fannin, Suite 2300
Houston, TX  77002








STATE OF COLORADO                   ss.
                                    ss.
COUNTY OF DENVER                    ss.

     BE IT REMEMBERED  THAT I, the undersigned  authority,  a notary public duly
qualified,  commissioned,  sworn  and  acting  in and for the  county  and state
aforesaid,   and   being   authorized   in  such   county   and  state  to  take
acknowledgments,  hereby  certify that, on this 7 day of April,  2005,  THERE
                                                -
personally  appeared  before  me:  David W.  Honeyfield,  the Vice  President  -
Finance,  Secretary and Treasurer of St. Mary Land &  Exploration Company, a
Delaware  corporation,  known to me to be such officer, such corporation being a
party to the foregoing instrument.

               The foregoing  instrument was acknowledged before me on this day,
               by such person,  the above designated  officer of the corporation
               specified  following  such  person's  name,  on  behalf  of  said
               corporation.

               On this date  before me, the  undersigned  authority,  personally
               came and appeared such person,  to me personally  known and known
               by me to be the person whose genuine  signature is affixed to the
               foregoing  document  as  the  above  designated  officer  of  the
               corporation  specified  following  such person's name, who signed
               said  document  before me in the  presence of the two  witnesses,
               whose  names are  thereto  subscribed  as such,  being  competent
               witnesses,  and  who  acknowledged,  in my  presence  and  in the
               presence  of  said  witnesses,  that  he  signed  the  above  and
               foregoing document as his own free act and deed on behalf of such
               corporation  by authority  of its board of  directors  and as the
               free  act and  deed  of such  corporation  and for the  uses  and
               purposes therein set forth and apparent.

     IN WITNESS  WHEREOF,  I have  hereunto set my hand and official seal in the
City of Denver, Denver County, Colorado on the day and year first above written.

                                /S/ JAMES C. ROBERTSON
                                ----------------------
                                NOTARY PUBLIC, in and for the State of Colorado

                                James C. Robertson
                                ------------------
My commission expires:          (printed name)

February 14, 2009
- -----------------

[SEAL]




     THUS DONE AND PASSED this 7 day of April, 2005, to be effective, however,
                               -
as of April 7, 2005, in my presence and in the presence of the undersigned
competent witnesses who hereunto sign their names with Mortgagor and me, Notary,
after reading of the whole.

WITNESSES:                      ST. MARY ENERGY COMPANY

/S/ DEBRA J. ARROYO
- -------------------
Name:  Debra J. Arroyo
       ---------------
                                By:  /S/ DAVID W. HONEYFIELD
                                     -----------------------
                                     David W. Honeyfield
/S/ MOLLY DOLTON                     Vice President - Finance, Secretary and
- ----------------                     Treasurer
Name:  Molly Dolton
       ------------

                             /S/ JAMES C. ROBERTSON

                               James C. Robertson
                               ------------------
                                  NOTARY PUBLIC

The address and tax identification number of Energy are:

580 Westlake Park Blvd., Suite 600
Houston, Texas  77079
(Harris County)
Taxpayer ID. No. 76-0554924


STATE OF COLORADO                   ss.
                                    ss.
COUNTY OF DENVER                    ss.

     BE IT REMEMBERED THAT I, the undersigned authority, a notary public duly
qualified, commissioned, sworn and acting in and for the county and state
aforesaid, and being authorized in such county and state to take
acknowledgments, hereby certify that, on this 7 day of April, 2005, there
                                              -
personally appeared before me: David W. Honeyfield, the Vice President -
Finance, Secretary and Treasurer of St. Mary Energy Company, a Delaware
corporation, known to me to be such officer, such corporation being a party to
the foregoing instrument.

               The foregoing  instrument was acknowledged before me on this day,
               by such person,  the above designated  officer of the corporation
               specified  following  such  person's  name,  on  behalf  of  said
               corporation.

               On this date  before me, the  undersigned  authority,  personally
               came and appeared such person,  to me personally  known and known
               by me to be the person whose genuine  signature is affixed to the
               foregoing  document  as  the  above  designated  officer  of  the
               corporation  specified  following  such person's name, who signed
               said  document  before me in the  presence of the two  witnesses,
               whose  names are  thereto  subscribed  as such,  being  competent
               witnesses,  and  who  acknowledged,  in my  presence  and  in the
               presence  of  said  witnesses,  that  he  signed  the  above  and
               foregoing document as his own free act and deed on behalf of such
               corporation  by authority  of its board of  directors  and as the
               free  act and  deed  of such  corporation  and for the  uses  and
               purposes therein set forth and apparent.

     IN WITNESS WHEREOF, I have hereunto set my hand and official seal in the
City of Denver, Denver County, Colorado on the day and year first above written.

                                /S/ JAMES C. ROBERTSON
                                ----------------------
                                NOTARY PUBLIC, in and for the State of Colorado

                                James C. Robertson
                                ------------------
My commission expires:          (printed name)

February 14, 2009
- -----------------

[SEAL]






     THUS DONE AND PASSED this 7 day of April, 2005, to be effective, however,
                               -
as of April 7, 2005, in my presence and in the presence of the undersigned
competent witnesses who hereunto sign their names with Mortgagor and me, Notary,
after reading of the whole.

WITNESSES:                      NANCE PETROLEUM CORPORATION

/S/ DEBRA J. ARROYO
- -------------------
Name:  Debra J. Arroyo
       ---------------
                                By:  /S/ DAVID W. HONEYFIELD
                                     -----------------------
                                     David W. Honeyfield
/S/ MOLLY DOLTON                     Vice President - Finance
- ----------------
Name:  Molly Dolton
       ------------

                             /S/ JAMES C. ROBERTSON

                               James C. Robertson
                               ------------------
                                  NOTARY PUBLIC

The address and tax identification number of Nance are:

550 North 31st Street, Suite 500
Billings, Montana 59101
(Yellowstone County)
Taxpayer I.D. No. 8 1-0309883


STATE OF COLORADO                           ss.
                                            ss.
COUNTY OF DENVER                            ss.

     BE IT REMEMBERED THAT I, the undersigned authority, a notary public duly
qualified, commissioned, sworn and acting in and for the county and state
aforesaid, and being authorized in such county and state to take
acknowledgments, hereby certify that, on this 7 day of April, 2005, there
                                              -
personally appeared before me: David W. Honeyfield, the Vice President - Finance
of Nance Petroleum Corporation, a Montana corporation, known to me to be such
officer, such corporation being a party to the foregoing instrument.

               The foregoing  instrument was acknowledged before me on this day,
               by such person,  the above designated  officer of the corporation
               specified  following  such  person's  name,  on  behalf  of  said
               corporation.

               On this date  before me, the  undersigned  authority,  personally
               came and appeared such person,  to me personally  known and known
               by me to be the person whose genuine  signature is affixed to the
               foregoing  document  as  the  above  designated  officer  of  the
               corporation  specified  following  such person's name, who signed
               said  document  before me in the  presence of the two  witnesses,
               whose  names are  thereto  subscribed  as such,  being  competent
               witnesses,  and  who  acknowledged,  in my  presence  and  in the
               presence  of  said  witnesses,  that  he  signed  the  above  and
               foregoing document as his own free act and deed on behalf of such
               corporation  by authority  of its board of  directors  and as the
               free  act and  deed  of such  corporation  and for the  uses  and
               purposes therein set forth and apparent.


     IN WITNESS  WHEREOF.  I have  hereunto set my hand and official seal in the
City of  Denver,  Denver  County,  Colorado,  on the day and  year  first  above
written.

                                /S/ JAMES C. ROBERTSON
                                ----------------------
                                NOTARY PUBLIC, in and for the State of Colorado

                                James C. Robertson
                                ------------------
My commission expires:          (printed name)

February 14, 2009
- -----------------

[SEAL]






     THUS DONE AND PASSED this 7 day of April, 2005, to be effective, however,
                               -
as of April 7, 2005, in my presence and in the presence of the undersigned
competent witnesses who hereunto sign their names with Mortgagor and me, Notary,
after reading of the whole.

WITNESSES:                      NPC INC.

/S/ DEBRA J. ARROYO
- -------------------
Name:  Debra J. Arroyo
       ---------------
                                By:  /S/ DAVID W. HONEYFIELD
                                     -----------------------
                                     David W. Honeyfield
/S/ MOLLY DOLTON                     Vice President - Finance
- ----------------
Name:  Molly Dolton
       ------------

                             /S/ JAMES C. ROBERTSON

                               James C. Robertson
                               ------------------
                                  NOTARY PUBLIC

The address and tax identification number of Operating are:

550 North 31st Street, Suite 500
Billings, Montana 59101
(Yellowstone County)
Taxpayer I.D. No. 11-3668557


STATE OF COLORADO                   ss.
                                    ss.
COUNTY OF DENVER                    ss.

     BE IT REMEMBERED THAT I, the undersigned authority, a notary public duly
qualified, commissioned, sworn and acting in and for the county and state
aforesaid, and being authorized in such county and state to take
acknowledgments, hereby certify that, on this 7 day of April, 2005, there
                                              -
personally appeared before me: David W. Honeyfield, the Vice President - Finance
of NPC Inc., a Colorado corporation. known to me to be such officer, such
corporation being a party to the foregoing instrument.

               The foregoing  instrument was acknowledged before me on this day,
               by such person,  the above designated  officer of the corporation
               specified  following  such  person's  name,  on  behalf  of  said
               corporation.

               On this date  before me, the  undersigned  authority,  personally
               came and appeared such person,  to me personally  known and known
               by me to be the person whose genuine  signature is affixed to the
               foregoing  document  as  the  above  designated  officer  of  the
               corporation  specified  following  such person's name, who signed
               said  document  before me in the  presence of the two  witnesses,
               whose  names are  thereto  subscribed  as such,  being  competent
               witnesses,  and  who  acknowledged,  in my  presence  and  in the
               presence  of  said  witnesses,  that  he  signed  the  above  and
               foregoing document as his own free act and deed on behalf of such
               corporation  by authority  of its board of  directors  and as the
               free  act and  deed  of such  corporation  and for the  uses  and
               purposes therein set forth and apparent.


     IN WITNESS  WHEREOF,  I have  hereunto set my hand and official seal in the
City of  Denver,  Denver  County,  Colorado,  on the day and  year  first  above
written.

                                /S/ JAMES C. ROBERTSON
                                ----------------------
                                NOTARY PUBLIC, in and for the State of Colorado

                                James C. Robertson
                                ------------------
My commission expires:          (printed name)

February 14, 2009

[SEAL]






                                    EXHIBIT A

              [Description of leases and lands, grouped with wells]

     Need actual land descriptions for the States of North Dakota,  Oklahoma and
Wyoming -references to recorded instruments containing  descriptions  sufficient
for all other states







                                   SCHEDULE I

     [List  of  Wells  with  corresponding  Working  Interests  and Net  Revenue
interests]

EX-31

                                                                    EXHIBIT 31.1

                             CEO CERTIFICATIONS FOR
                          FIRST QUARTER 2005 FORM 10-Q


I, Mark A. Hellerstein certify that:

1.       I have reviewed this quarterly report on Form 10-Q of St. Mary Land
         & Exploration Company;

2.       Based on my knowledge, this report does not contain any untrue
         statement of a material fact or omit to state a material fact necessary
         to make the statements made, in light of the circumstances under which
         such statements were made, not misleading with respect to the period
         covered by this report;

3.       Based on my knowledge, the financial statements, and other financial
         information included in this report, fairly present in all material
         respects the financial condition, results of operations and cash flows
         of the registrant as of, and for, the periods presented in this report;

4.       The registrant's other certifying officer and I are responsible for
         establishing and maintaining disclosure controls and procedures (as
         defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal
         control over financial reporting (as defined in Exchange Act Rules
         13a-15(f) and 15d-15(f)) for the registrant and have:

         (a)      Designed such disclosure controls and procedures, or caused
                  such disclosure controls and procedures to be designed under
                  our supervision, to ensure that material information relating
                  to the registrant, including its consolidated subsidiaries, is
                  made known to us by others within those entities, particularly
                  during the period in which this report is being prepared;

         (b)      Designed such internal control over financial reporting, or
                  caused such internal control over financial reporting to be
                  designed under our supervision, to provide reasonable
                  assurance regarding the reliability of financial reporting and
                  the preparation of financial statements for external purposes
                  in accordance with generally accepted accounting principles;

         (c)      Evaluated the effectiveness of the registrant's disclosure
                  controls and procedures and presented in this report our
                  conclusions about the effectiveness of the disclosure controls
                  and procedures, as of the end of the period covered by this
                  report based on such evaluation; and

         (d)      Disclosed in this report any change in the registrant's
                  internal control over financial reporting that occurred during
                  the registrant's most recent fiscal quarter that has
                  materially affected, or is reasonably likely to materially
                  affect, the registrant's internal control over financial
                  reporting; and

                                      B-1


5.       The registrant's other certifying officer and I have disclosed, based
         on our most recent evaluation of internal control over financial
         reporting, to the registrant's auditors and the audit committee of the
         registrant's board of directors (or persons performing the equivalent
         functions):

         (a)      All significant deficiencies and material weaknesses in the
                  design or operation of internal control over financial
                  reporting which are reasonably likely to adversely affect the
                  registrant's ability to record, process, summarize and report
                  financial information; and

         (b)      Any fraud, whether or not material, that involves management
                  or other employees who have a significant role in the
                  registrant's internal control over financial reporting.


Date:  May 2, 2005

/S/ MARK A. HELLERSTEIN
- -----------------------
Mark A. Hellerstein
 Chief Executive Officer

EX-31

                                                                    EXHIBIT 31.2

                          VP FINANCE CERTIFICATIONS FOR
                          FIRST QUARTER 2005 FORM 10-Q


I, David W. Honeyfield, certify that:

1.       I have reviewed this quarterly report on Form 10-Q of St. Mary Land
         & Exploration Company;

2.       Based on my knowledge, this report does not contain any untrue
         statement of a material fact or omit to state a material fact necessary
         to make the statements made, in light of the circumstances under which
         such statements were made, not misleading with respect to the period
         covered by this report;

3.       Based on my knowledge, the financial statements, and other financial
         information included in this report, fairly present in all material
         respects the financial condition, results of operations and cash flows
         of the registrant as of, and for, the periods presented in this report;

4.       The registrant's other certifying officer and I are responsible for
         establishing and maintaining disclosure controls and procedures (as
         defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal
         control over financial reporting (as defined in Exchange Act Rules
         13a-15(f) and 15d-15(f)) for the registrant and have:

         (a)      Designed such disclosure controls and procedures, or caused
                  such disclosure controls and procedures to be designed under
                  our supervision, to ensure that material information relating
                  to the registrant, including its consolidated subsidiaries, is
                  made known to us by others within those entities, particularly
                  during the period in which this report is being prepared;

         (b)      Designed such internal control over financial reporting, or
                  caused such internal control over financial reporting to be
                  designed under our supervision, to provide reasonable
                  assurance regarding the reliability of financial reporting and
                  the preparation of financial statements for external purposes
                  in accordance with generally accepted accounting principles;

         (c)      Evaluated the effectiveness of the registrant's disclosure
                  controls and procedures and presented in this report our
                  conclusions about the effectiveness of the disclosure controls
                  and procedures, as of the end of the period covered by this
                  report based on such evaluation; and

         (d)      Disclosed in this report any change in the registrant's
                  internal control over financial reporting that occurred during
                  the registrant's most recent fiscal quarter that has
                  materially affected, or is reasonably likely to materially
                  affect, the registrant's internal control over financial
                  reporting; and

                                      B-1



5.       The registrant's other certifying officer and I have disclosed, based
         on our most recent evaluation of internal control over financial
         reporting, to the registrant's auditors and the audit committee of the
         registrant's board of directors (or persons performing the equivalent
         functions):

         (a)      All significant deficiencies and material weaknesses in the
                  design or operation of internal control over financial
                  reporting which are reasonably likely to adversely affect the
                  registrant's ability to record, process, summarize and report
                  financial information; and

         (b)      Any fraud, whether or not material, that involves management
                  or other employees who have a significant role in the
                  registrant's internal control over financial reporting.


Date:  May 2, 2005

/S/ DAVID W. HONEYFIELD
- -----------------------
David W. Honeyfield
Vice President - Finance

EX-32

                                                                    EXHIBIT 32.1


                                  CERTIFICATION
                                   PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


         In connection with the Quarterly Report on Form 10-Q of St. Mary Land
& Exploration Company (the "Company") for the quarterly period ended March
31, 2005 as filed with the Securities and Exchange Commission on the date hereof
(the "Report"), Mark A. Hellerstein, as Chief Executive Officer of the Company,
and David W. Honeyfield, as Vice President - Finance of the Company, each hereby
certifies, pursuant to and solely for the purpose of 18 U.S.C. Section 1350, as
adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best
of his knowledge and belief, that:

         (1) The Report fully complies with the requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

         (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company.




/S/ MARK A. HELLERSTEIN
- -----------------------
Mark A. Hellerstein
Chief Executive Officer
May 2, 2005



/S/ DAVID W. HONEYFIELD
- -----------------------
David W. Honeyfield
Vice President - Finance
(principal financial officer)
May 2, 2005