10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D. C. 20549

FORM 10-Q

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

For the quarterly period ended September 30, 2012

OR

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

Commission file number: 001-31465

NATURAL RESOURCE PARTNERS L.P.

(Exact name of registrant as specified in its charter)

Delaware	35-2164875
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)

601 Jefferson Street, Suite 3600

Houston, Texas 77002

(Address of principal executive offices)

(Zip Code)

(713) 751-7507

(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 has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).     Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definition of “accelerated filer”, “large accelerated filer”, and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large Accelerated Filer	x	Accelerated Filer	¨
Non-accelerated Filer	¨ (Do not check if a smaller reporting company)	Smaller Reporting Company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

At November 7, 2012 there were 106,027,836 Common Units outstanding.

TABLE OF CONTENTS

	Page
PART I. FINANCIAL INFORMATION
ITEM 1. Financial Statements
Consolidated Balance Sheets as of September 30, 2012 and December 31, 2011		4
Consolidated Statements of Comprehensive Income For the Three and Nine Months Ended September  30, 2012 and 2011		5
Consolidated Statements of Cash Flows For the Nine Months Ended September 30, 2012 and 2011		6
Consolidated Statements of Partners’ Capital as of September 30, 2012 and December 31, 2011		7
Notes to Consolidated Financial Statements		8
ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations
Executive Overview		18
Results of Operations		22
Liquidity and Capital Resources		26
Related Party Transactions		28
Environmental		30
ITEM 3. Quantitative and Qualitative Disclosures About Market Risk		31
ITEM 4. Controls and Procedures		32
PART II. OTHER INFORMATION
ITEM 1. Legal Proceedings		33
ITEM 1A. Risk Factors		33
ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds		33
ITEM 3. Defaults Upon Senior Securities		33
ITEM 4. Mine Safety Disclosures		33
ITEM 5. Other Information		33
ITEM 6. Exhibits		34
Signatures		35

2

Forward-Looking Statements

Statements included in this Form 10-Q are forward-looking statements. In addition, we and our representatives may from time to time make other oral or written statements that are also forward-looking statements.

Such forward-looking statements include, among other things, statements regarding capital expenditures, acquisitions and dispositions, expected commencement dates of mining, projected quantities of future production by our lessees and projected demand for or supply of coal, aggregates and oil and gas that will affect sales levels, prices and royalties and other revenues realized by us.

These forward-looking statements are made based upon management’s current plans, expectations, estimates, assumptions and beliefs concerning future events impacting us and therefore involve a number of risks and uncertainties. We caution that forward-looking statements are not guarantees and that actual results could differ materially from those expressed or implied in the forward-looking statements.

You should not put undue reliance on any forward-looking statements. Please read “Item 1A. Risk Factors” in our Form 10-K for the year ended December 31, 2011 for important factors that could cause our actual results of operations or our actual financial condition to differ.

Prior Year Financial Information

We restated certain income-related items with respect to 2011 to properly reflect them in the correct quarter. Please read Note 17. “Supplemental Financial Information (unaudited)” in our Form 10-K for the year ended December 31, 2011 for additional information related to the restatements of our prior year financial data.

3

Part I. Financial Information

Item 1. Financial Statements

NATURAL RESOURCE PARTNERS L.P.

CONSOLIDATED BALANCE SHEETS

(In thousands, except unit data)

	September 30,			December 31,
	2012			2011
	(Unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	122,419		$	214,922
Accounts receivable, net of allowance for doubtful accounts		36,761			30,923
Accounts receivable - affiliates		10,077			10,138
Other		218			832
Total current assets		169,475			256,815
Land		24,515			24,534
Plant and equipment, net		33,968			46,185
Coal and other mineral rights, net		1,352,800			1,257,501
Intangible assets, net		71,900			75,164
Loan financing costs, net		4,430			4,846
Long-term contracts receivable - affiliate		55,741			—
Other assets, net		849			604
Total assets	$	1,713,678		$	1,665,649
LIABILITIES AND PARTNERS’ CAPITAL
Current liabilities:
Accounts payable and accrued liabilities	$	3,223		$	2,366
Accounts payable - affiliates		573			375
Obligation related to acquisitions		—			500
Current portion of long-term debt		87,230			30,801
Accrued incentive plan expenses - current portion		7,585			8,374
Property, franchise and other taxes payable		5,602			6,316
Accrued interest		7,990			10,761
Total current liabilities		112,203			59,493
Deferred revenue		123,689			113,303
Accrued incentive plan expenses		8,915			11,670
Long-term debt		852,039			836,268
Partners’ capital:
Common units outstanding (106,027,836)		604,430			629,253
General partner’s interest		10,013			10,517
Non-controlling interest		2,845			5,638
Accumulated other comprehensive loss		(456	)		(493	)
Total partners’ capital		616,832			644,915
Total liabilities and partners’ capital	$	1,713,678		$	1,665,649

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

4

NATURAL RESOURCE PARTNERS L.P.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands, except per unit data)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
	(Unaudited)						(Unaudited)
				(Restated)						(Restated)
Revenues:
Coal royalties	$	70,259		$	74,976		$	193,053		$	211,583
Aggregate royalties		1,643			2,099			5,061			5,124
Processing fees		1,641			3,967			6,905			10,229
Transportation fees		5,007			4,765			14,361			12,608
Oil and gas royalties		1,246			5,059			6,712			10,047
Property taxes		3,602			2,974			11,421			9,563
Minimums recognized as revenue		1,096			2,429			13,748			5,456
Override royalties		3,359			4,131			11,998			10,666
Other		6,322			2,764			13,452			9,272
Total revenues		94,175			103,164			276,711			284,548
Operating costs and expenses:
Depreciation, depletion and amortization		14,485			19,819			42,066			51,576
Asset impairment		—			90,932			—			90,932
General and administrative		8,225			5,521			24,204			22,156
Property, franchise and other taxes		4,853			3,915			13,640			10,918
Transportation costs		446			540			1,446			1,531
Coal royalty and override payments		523			233			1,396			700
Total operating costs and expenses		28,532			120,960			82,752			177,813
Income (loss) from operations		65,643			(17,796	)		193,959			106,735
Other income (expense):
Interest expense		(13,677	)		(12,779	)		(40,815	)		(35,795	)
Interest income		35			16			104			40
Income (loss) before non-controlling interest		52,001			(30,559	)		153,248			70,980
Less non-controlling interest		—			—			—			51
Net income (loss)	$	52,001		$	(30,559	)	$	153,248		$	70,929
Net income (loss) attributable to:
General partner	$	1,040		$	(611	)	$	3,065		$	1,419
Limited partners	$	50,961		$	(29,948	)	$	150,183		$	69,510
Basic and diluted net income (loss) per limited partner unit	$	0.48		$	(0.28	)	$	1.42		$	0.66
Weighted average number of units outstanding		106,028			106,028			106,028			106,028
Comprehensive income (loss)	$	52,015		$	(30,545	)	$	153,285		$	70,968

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

5

NATURAL RESOURCE PARTNERS L.P.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

	Nine Months Ended September 30,
	2012			2011
	(Unaudited)
				(Restated)
Cash flows from operating activities:
Net income	$	153,248		$	70,929
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization		42,066			51,576
Asset impairment		—			90,932
Gains on sale of assets		(8,823	)		(1,058	)
Gain on reserve swap		—			(2,990	)
Non-cash interest charge, net		453			493
Non-controlling interest		—			51
Change in operating assets and liabilities:
Accounts receivable		666			(12,770	)
Other assets		369			556
Accounts payable and accrued liabilities		1,055			213
Accrued interest		(2,771	)		(1,710	)
Deferred revenue		11,867			24,541
Accrued incentive plan expenses		(3,544	)		(14	)
Property, franchise and other taxes payable		(714	)		(2,427	)
Net cash provided by operating activities		193,872			218,322
Cash flows from investing activities:
Acquisition of land, coal and other mineral rights		(134,463	)		(107,509	)
Acquisition or construction of plant and equipment		(681	)		(325	)
Proceeds from sale of assets		15,047			5,500
Return on direct financing lease and contractual override		2,399			—
Acquisition of contracts		(59,009	)		—
Net cash used in investing activities		(176,707	)		(102,334	)
Cash flows from financing activities:
Proceeds from loans		103,000			335,000
Repayment of loans		(30,800	)		(210,519	)
Deferred financing costs		—			(2,774	)
Repayment of obligation related to acquisitions		(500	)		(7,625	)
Costs associated with equity transactions		(59	)		(141	)
Distributions to partners		(181,309	)		(175,323	)
Net cash used in financing activities		(109,668	)		(61,382	)
Net increase (decrease) in cash and cash equivalents		(92,503	)		54,606
Cash and cash equivalents at beginning of period		214,922			95,506
Cash and cash equivalents at end of period	$	122,419		$	150,112
Supplemental cash flow information:
Cash paid during the period for interest	$	43,113		$	37,074
Non-cash activities:
Obligation related to purchase of reserves and infrastructure	$	—		$	4,100
Non-controlling interest		—			373
Note receivable from sale of asset		1,808			—

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

6

NATURAL RESOURCE PARTNERS L.P.

CONSOLIDATED STATEMENTS OF PARTNERS’ CAPITAL

(In thousands, except unit data)

	Common Units					General Partner			Non- Controlling Interest			Accumulated Other Comprehensive
	Units		Amounts			Amounts			Amounts			Income (Loss)			Total
Balance at December 31, 2011		106,027,836	$	629,253		$	10,517		$	5,638		$	(493	)	$	644,915
Cost associated with equity transactions		—		(59	)		—			—			—			(59	)
Distributions		—		(174,947	)		(3,569	)		(2,793	)		—			(181,309	)
Net income		—		150,183			3,065			—			—			153,248
Loss on interest hedge		—		—			—			—			37			37
Comprehensive income		—		—			—			—			37			153,285
Balance at September 30, 2012		106,027,836	$	604,430		$	10,013		$	2,845		$	(456	)	$	616,832

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

7

NATURAL RESOURCE PARTNERS L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.    Basis of Presentation and Organization

The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2012 are not necessarily indicative of the results that may be expected for future periods.

You should refer to the information contained in the footnotes included in Natural Resource Partners L.P.’s 2011 Annual Report on Form 10-K in connection with the reading of these unaudited interim consolidated financial statements. The Partnership restated certain income-related items with respect to 2011 to properly reflect them in the correct quarter. Please read Note 17. “Supplemental Financial Information (unaudited)” in the Partnership’s Form 10-K for the year ended December 31, 2011 for additional information related to the restatements of its prior year interim financial data.

The Partnership engages principally in the business of owning, managing and leasing mineral properties in the United States. The Partnership owns coal reserves in the three major coal-producing regions of the United States: Appalachia, the Illinois Basin and the Western United States, as well as lignite reserves in the Gulf Coast region. The Partnership also owns aggregate reserves in several states across the country. The Partnership does not operate any mines on its properties, but leases reserves to experienced operators under long-term leases that grant the operators the right to mine the Partnership’s reserves in exchange for royalty payments. Lessees are generally required to make payments based on the higher of a percentage of the gross sales price or a fixed royalty per ton, in addition to a minimum payment.

In addition, the Partnership owns transportation and preparation equipment, other mineral related rights and oil and gas properties on which it earns revenue.

The general partner of the Partnership is NRP (GP) LP, a Delaware limited partnership, whose general partner is GP Natural Resource Partners LLC, a Delaware limited liability company.

2.    Recent Accounting Pronouncements

In June 2011, the FASB amended the presentation of comprehensive income. The amendments in this update gave the Partnership the option to present the total comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendments in this update also require the Partnership to present changes in accumulated other comprehensive income by component in the statement of unitholders’ equity or in the notes to the financial statements. These amendments are effective for fiscal years and interim periods within those years, beginning on or after December 15, 2011. The Partnership adopted this amendment on January 1, 2012 and elected to present other comprehensive income in a single continuous statement, Consolidated Statements of Comprehensive Income. The Partnership also elected to present changes in accumulated other comprehensive income in the Consolidated Statements of Partners’ Capital.

In May 2011, the FASB amended fair value measurement and disclosure requirements. The amendments result in common fair value measurement and disclosure requirements in U.S. GAAP and International Financial Reporting Standards (IFRSs). Some of the amendments clarify the FASB’s intent about the application of existing fair value measurement requirements. Other amendments change a particular principal or requirement for measuring fair value or for disclosing information about fair value measurements. These amendments are effective for fiscal years and interim periods within those years, beginning on or after December 15, 2011. The Partnership adopted this amendment on January 1, 2012. The amendment did not have a material impact on its financial position, results of operations, cash flows or notes to the financial statements.

Other accounting standards that have been issued by the FASB or other standards-setting bodies are not expected to have a material impact on the Partnership’s financial position, results of operations and cash flows.

8

3.    Significant Acquisitions

Colt. In September 2009, the Partnership signed a definitive agreement to acquire approximately 200 million tons of coal reserves related to the Deer Run Mine in Illinois from Colt, LLC, an affiliate of the Cline Group, through several separate transactions for a total purchase price of $255 million. During the three and nine month periods ended September 30, 2012, the Partnership paid $40.0 million and $80.0 million, respectively, to complete the acquisition of reserves at this mine.

Oklahoma Oil and Gas. From December 2011 through June 2012, the Partnership acquired approximately 19,200 net mineral acres located in the Mississippian Lime oil play in Northern Oklahoma for approximately $63.9 million, of which 15,600 net mineral acres were acquired during the first nine months of 2012 for $51.3 million.

Sugar Camp. In March 2012, the Partnership acquired from Sugar Camp Energy, an affiliate of the Cline Group, the rail loadout and associated infrastructure assets at the Sugar Camp mine in Illinois for total consideration of $50.0 million. At the time of the acquisition, the Partnership also entered into a lease agreement related to the rail loadout and associated facilities that has been accounted for as a direct financing lease. The lease provides for payments based upon tons of coal transported over the facilities subject to quarterly recoupable minimum payments of $1.25 million. The lease is for a term of 20 years but may be extended by the lessee. Total projected remaining payments under the lease at September 30, 2012 are $97.1 million with unearned income of $47.6 million. The unearned income will be reflected as transportation fees over the term of the lease using the effective interest method. Any amounts in excess of the contractual minimums will be recorded as transportation fees as earned. The net amount receivable under the lease as of September 30, 2012 was $50.0 million, of which $1.7 million is included in accounts receivable – affiliates while the remaining is included in long-term contracts receivable - affiliate. The Partnership recognized $2.6 million in transportation fees during the nine months ended September 30, 2012 related to this lease.

In a separate transaction, the Partnership acquired, from Ruger, LLC, an affiliate of the Cline Group, a contractual overriding royalty interest for $8.9 million that will provide for payments based upon production from specific tons at the Sugar Camp operations. This overriding royalty was accounted for as a financing arrangement and is reflected as an affiliate receivable. The payments the Partnership receives with respect to the overriding royalty will be reflected partially as a return of the initial investment and partially as override revenue over the life of the contract using the effective interest method based upon actual production and adjusted periodically for differences in projected and actual production. The net amount receivable under the agreement as of September 30, 2012 was $7.3 million of which $1.1 million is included in accounts receivable – affiliates while the remaining is included in long-term contracts receivable - affiliate. The Partnership recognized $0.8 million in overriding royalty during the nine months ended September 30, 2012 related to the contractual overriding royalty interest.

4.    Plant and Equipment

The Partnership’s plant and equipment consist of the following:

	September 30, 2012			December 31, 2011
	(In thousands)
	(Unaudited)
Plant construction in process	$	—		$	78
Plant and equipment at cost		55,271			67,175
Less accumulated depreciation		(21,303	)		(21,068	)
Net book value	$	33,968		$	46,185
	Nine months ended September 30,
	2012			2011
	(In thousands)
	(Unaudited)
Total depreciation expense on plant and equipment	$	5,259		$	6,681

9

During the third quarter the Partnership sold a preparation plant to Taggart Global USA, LLC, a related party, for $12.3 million. See Note 9. “Related Party Transactions” for an understanding of Taggart and the Partnership’s relationship. The Partnership received $10.5 million in cash and a note receivable from Taggart, payable over three years for the balance. The note receivable balance at September 30, 2012 was $1.8 million. The Partnership recorded a gain of $4.7 million included in Other income of the Consolidated Statements of Income for the third quarter of 2012. The net book value of the asset sold was $7.6 million.

5.    Coal and Other Mineral Rights

The Partnership’s coal and other mineral rights consist of the following:

	September 30, 2012			December 31, 2011
	(In thousands)
	(Unaudited)
Coal and other mineral rights	$	1,774,297		$	1,645,451
Less accumulated depletion and amortization		(421,497	)		(387,950	)
Net book value	$	1,352,800		$	1,257,501

	Nine months ended September 30,
	2012		2011
	(In thousands)
	(Unaudited)
			(Restated)
Total depletion and amortization expense on coal and other mineral rights	$	33,547	$	36,646

6.    Intangible Assets

Amounts recorded as intangible assets along with the balances and accumulated amortization are reflected in the table below:

	September 30, 2012			December 31, 2011
	(In thousands)
	(Unaudited)
Contract intangibles	$	89,420		$	89,420
Less accumulated amortization		(17,520	)		(14,256	)
Net book value	$	71,900		$	75,164

	Nine months ended September 30,
	2012		2011
	(In thousands) (Unaudited)
Total amortization expense on intangible assets	$	3,264	$	8,248

10

The estimates of future amortization expense relating to intangible assets for the periods indicated below are based on current mining plans, which are subject to revision in future periods.

	Estimated Amortization Expense
	(In thousands)
	(Unaudited)
Remainder of 2012	$	503
For year ended December 31, 2013		4,664
For year ended December 31, 2014		4,500
For year ended December 31, 2015		4,500
For year ended December 31, 2016		4,500

7.    Long-Term Debt

Long-term debt consists of the following:

	September 30, 2012			December 31, 2011
	(In thousands)
$300 million floating rate revolving credit facility, due August 2016	$	103,000		$	—
5.55% senior notes, with semi-annual interest payments in June and December, maturing June 2013		35,000			35,000
4.91% senior notes, with semi-annual interest payments in June and December, with annual principal payments in June, maturing in June 2018		27,700			32,317
8.38% senior notes, with semi-annual interest payments in March and September, with scheduled principal payments beginning March 2013, maturing in March 2019		150,000			150,000
5.05% senior notes, with semi-annual interest payments in January and July, with annual principal payments in July, maturing in July 2020		61,538			69,230
5.31% utility local improvement obligation, with annual principal and interest payments, maturing in March 2021		1,731			1,922
5.55% senior notes, with semi-annual interest payments in June and December, with annual principal payments in June, maturing in June 2023		30,300			33,600
4.73% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2023		75,000			75,000
5.82% senior notes, with semi-annual interest payments in March and September, with annual principal payments in March, maturing in March 2024		180,000			195,000
8.92% senior notes, with semi-annual interest payments in March and September, with scheduled principal payments beginning March 2014, maturing in March 2024		50,000			50,000
5.03% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2026		175,000			175,000
5.18% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2026		50,000			50,000
Total debt		939,269			867,069
Less – current portion of long term debt		(87,230	)		(30,801	)
Long-term debt	$	852,039		$	836,268

11

Principal payments due in:

	Senior Notes		Credit Facility		Total
	(In thousands)
Remainder of 2012	$	—	$	—	$	—
2013		87,230		—		87,230
2014		80,983		—		80,983
2015		80,983		—		80,983
2016		80,983		103,000		183,983
Thereafter		506,090		—		506,090
	$	836,269	$	103,000	$	939,269

The senior note purchase agreement contains covenants requiring our operating subsidiary to:

• Maintain a ratio of consolidated indebtedness to consolidated EBITDDA (as defined in the note purchase agreement) of no more than 4.0 to 1.0 for the four most recent quarters;

• not permit debt secured by certain liens and debt of subsidiaries to exceed 10% of consolidated net tangible assets (as defined in the note purchase agreement); and

• maintain the ratio of consolidated EBITDDA to consolidated fixed charges (consisting of consolidated interest expense and consolidated operating lease expense) at not less than 3.5 to 1.0.

The 8.38% and 8.92% senior notes also provide that in the event that the Partnership’s leverage ratio exceeds 3.75 to 1.00 at the end of any fiscal quarter, then in addition to all other interest accruing on these notes, additional interest in the amount of 2.00% per annum shall accrue on the notes for the two succeeding quarters and for as long thereafter as the leverage ratio remains above 3.75 to 1.00.

The Partnership made principal payments of $30.8 million on its senior notes during the nine months ended September 30, 2012.

At September 30, 2012, the Partnership had $103 million outstanding on its revolving credit facility; while at December 31, 2011 the Partnership did not have any outstanding balance. The weighted average interest rates for the nine months ended September 30, 2012 and year ended December 31, 2011 were 2.13% and 1.83%, respectively. The Partnership incurs a commitment fee on the undrawn portion of the revolving credit facility at rates ranging from 0.18% to 0.40% per annum. The facility includes an accordion feature whereby the Partnership may request its lenders to increase their aggregate commitment to a maximum of $500 million on the same terms.

The revolving credit facility contains covenants requiring the Partnership to maintain:

• a ratio of consolidated indebtedness to consolidated EBITDDA (as defined in the credit agreement) not to exceed 4.0 to 1.0 and,

• a ratio of consolidated EBITDDA to consolidated fixed charges (consisting of consolidated interest expense and consolidated lease operating expense) of not less than 3.5 to 1.0 for the four most recent quarters.

The Partnership was in compliance with all terms under its long-term debt as of September 30, 2012.

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8.    Fair Value

The Partnership’s financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable and long-term debt. The carrying amount of the Partnership’s financial instruments included in accounts receivable and accounts payable approximates their fair value due to their short-term nature except for the accounts receivable – affiliate relating to the Sugar Camp override and Taggart preparation plant sale that includes both current and long-term portions. The Partnership’s cash and cash equivalents include money market accounts and are considered a Level 1 measurement. The fair market value and carrying value of the contractual override, Taggart note receivable and long-term senior notes are as follows:

	Fair Value As Of				Carrying Value As Of
	September 30, 2012		December 31, 2011		September 30, 2012		December 31, 2011
	(In thousands)
	(Unaudited)				(Unaudited)
Assets
Sugar Camp override, current     and long - term	$	8,724	$	—	$	7,294	$	—
Taggart plant sale, current     and long-term	$	1,808	$	—	$	1,808	$	—
Liabilities
Long-term debt, current and long-term	$	881,023	$	915,959	$	836,269	$	867,069

The fair value of the Sugar Camp override, Taggart plant sale and long-term debt is estimated by management using comparable term risk-free treasury issues with a market rate component determined by current financial instruments with similar characteristics which is a Level 3 measurement. Since the Partnership’s credit facility is variable rate debt, its fair value approximates its carrying amount.

9.    Related Party Transactions

Reimbursements to Affiliates of our General Partner

The Partnership’s general partner does not receive any management fee or other compensation for its management of Natural Resource Partners L.P. However, in accordance with the partnership agreement, the general partner and its affiliates are reimbursed for expenses incurred on the Partnership’s behalf. All direct general and administrative expenses are charged to the Partnership as incurred. The Partnership also reimburses indirect general and administrative costs, including certain legal, accounting, treasury, information technology, insurance, administration of employee benefits and other corporate services incurred by our general partner and its affiliates. The Partnership had an amount payable to Quintana Minerals Corporation of $0.3 million at September 30, 2012 for services provided by Quintana to the Partnership and a payable of $0.3 million to Western Pocahontas Properties for an overriding royalty interest on one of the Partnership’s leases.

The reimbursements to affiliates of the Partnership’s general partner for services performed by Western Pocahontas Properties and Quintana Minerals Corporation are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)
Reimbursement for services	$	2,303	$	2,050	$	7,230	$	6,203

The Partnership also leases an office building in Huntington, West Virginia from Western Pocahontas Properties and pays $0.6 million in lease payments each year through December 31, 2018.

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Cline Affiliates

Various companies controlled by Chris Cline lease coal reserves from the Partnership, and the Partnership provides coal transportation services to them for a fee. At September 30, 2012, Mr. Cline, both individually and through another affiliate, Adena Minerals, LLC, owns a 31% interest in the Partnership’s general partner, as well as 12,617,673 common units. Revenues from the Cline affiliates are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)
			(Restated)				(Restated)
Coal royalty revenues	$	12,894	$	14,790	$	34,351	$	30,673
Processing fees		715		885		1,745		2,078
Transportation fees		5,008		4,765		14,362		12,609
Minimums recognized as revenue		—		—		9,556		—
Override revenue		1,075		704		2,768		1,384
Other revenue		—		—		—		2,990
	$	19,692	$	21,144	$	62,782	$	49,734

At September 30, 2012, the Partnership had amounts due from Cline affiliates totaling $62.9 million, of which $57.3 million was attributable to agreements relating to the recent Sugar Camp acquisition. See Note 3. “Significant Acquisitions” for further disclosure relating to the Sugar Camp agreements. The Partnership had received $57.7 million in minimum royalty payments that have not been recouped by Cline affiliates, of which $20.8 million was received in the current year. The $9.6 million in minimums recognized as revenue during the first nine months of 2012 was attributable to an agreement in 2012 by Gatling Ohio, LLC to relinquish its recoupment rights.

During 2011, the Partnership recognized a $3.0 million gain on a reserve exchange of over one million tons in Illinois with Williamson Energy, a Cline affiliate. The fair value of the reserves was estimated using Level 3 cash flow approach. The expected cash flows were developed using estimated annual sales tons, forecasted sales prices and anticipated market royalty rates. The tons received will be fully mined during 2012, while the tons exchanged are not included in the current mine plans. The gain is included in Other revenues on the Consolidated Statements of Comprehensive Income.

Quintana Capital Group GP, Ltd.

Corbin J. Robertson, Jr. is a principal in Quintana Capital Group GP, Ltd., which controls several private equity funds focused on investments in the energy business. In connection with the formation of Quintana Capital, the Partnership adopted a formal conflicts policy that establishes the opportunities that will be pursued by the Partnership and those that will be pursued by Quintana Capital. The governance documents of Quintana Capital’s affiliated investment funds reflect the guidelines set forth in NRP’s conflicts policy.

A fund controlled by Quintana Capital owns a significant membership interest in Taggart Global USA, LLC, including the right to nominate two members of Taggart’s 5-person board of directors. The Partnership owns and leases preparation plants to Taggart Global, which designs, builds and operates the plants. The lease payments are based on the sales price for the coal that is processed through the facilities. During the third quarter, the Partnership sold a preparation plant to Taggart for $12.3 million. The Partnership received $10.5 million in cash and a note receivable from Taggart, payable over three years for the balance. As a result of the sale, the Partnership recorded a gain of $4.7 million included in Other revenue in the Statements of Comprehensive Income. The note receivable balance at September 30, 2012 was $1.8 million.

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The Partnership currently leases three facilities to Taggart. Revenues from Taggart are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)				(In thousands) (Unaudited)
Processing fees	$	664	$	2,962	$	4,321	$	7,587

At September 30, 2012, the Partnership had accounts receivable of $0.7 million from Taggart.

A fund controlled by Quintana Capital owns Kopper-Glo, a small coal mining company that is one of the Partnership’s lessees with operations in Tennessee. Revenues from Kopper-Glo are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)				(In thousands) (Unaudited)
Coal royalty revenues	$	996	$	440	$	2,594	$	1,192

The Partnership also had accounts receivable totaling $0.4 million from Kopper-Glo at September 30, 2012.

10.    Commitments and Contingencies

Legal

The Partnership is involved, from time to time, in various legal proceedings arising in the ordinary course of business. While the ultimate results of these proceedings cannot be predicted with certainty, Partnership management believes these claims will not have a material effect on the Partnership’s financial position, liquidity or operations.

Environmental Compliance

The operations that the Partnership’s lessees conduct on the Partnership’s properties are subject to environmental laws and regulations adopted by various governmental authorities in the jurisdictions in which these operations are conducted. As an owner of coal reserves, as well as surface interests in some properties, the Partnership may be liable for environmental conditions occurring at the Partnership’s properties. The terms of substantially all of the Partnership’s leases require the lessee to comply with all applicable laws and regulations, including environmental laws and regulations. Lessees post reclamation bonds assuring that reclamation will be completed as required by the relevant permit, and substantially all of the leases require the lessee to indemnify the Partnership against, among other things, environmental liabilities. Some of these indemnifications survive the termination of the lease. The Partnership makes regular visits to the mines to ensure compliance with lease terms, but the duty to comply with all regulations rests with the lessees. The Partnership believes that its lessees will be able to comply with existing regulations and does not expect any lessee’s failure to comply with environmental laws and regulations to have a material impact on the Partnership’s financial condition or results of operations. The Partnership also carries pollution liability insurance, and West Virginia has established a fund to satisfy any shortfall in the Partnership’s lessees’ reclamation obligations, but this fund may not be sufficient to cover the Partnership’s costs in the event that it is determined to be responsible for environmental contamination.

The Partnership’s lessees regularly conduct reclamation work on the properties under lease to them. Because the Partnership is not the permittee of the operations on its properties, the Partnership is not responsible for the costs associated with the reclamation. However, the Partnership has received a Notice of Intent to File a Citizen Suit in connection with alleged selenium discharges from one of its properties in West Virginia. Mining has now ceased on the property, but was originally conducted by Pittston Coal Company, which assigned the lease to Massey Energy, which subsequently merged with Alpha Natural Resources. The reclamation has been completed and the permits and bonding have been released, leading the plaintiffs to name the Partnership as the party responsible for the alleged discharge since the Partnership is the current owner of the property. Several other landowners have recently received similar notices, but these are the first instances of which the Partnership is aware that have targeted landowners

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rather than the mining companies. As of September 30, 2012, the Partnership had not been sued in connection with the notice. Although this particular litigation, if filed, would not be material to the Partnership, to the extent that the Partnership is not successful in defending these types of claims, does not receive indemnity under its leases or the claims are not covered by the Partnership’s pollution liability insurance, or to the extent that these types of claims become more pervasive in the future, these issues could become material to NRP.

11.    Major Lessees

Revenues from lessees that exceeded ten percent of total revenues for the periods are presented below:

	Three Months Ended September 30,										Nine Months Ended September 30,
	2012						2011				2012					2011
	(Dollars in thousands) (Unaudited)										(Dollars in thousands) (Unaudited)
						(Restated)										(Restated)
	Revenues		Percent			Revenues		Percent			Revenues		Percent			Revenues		Percent
Alpha Natural Resources	$	19,731		21	%	$27,718			27	%	$	64,118		23	%	$	82,010		29	%
The Cline Group	$	19,692		21	%	$21,144			20	%	$	62,782		23	%	$	49,734		17	%

In the first nine months of 2012, the Partnership derived over 46% of its total revenue from the two companies listed above. As a result, the Partnership has a significant concentration of revenues with those lessees, although in most cases, with the exception of the Williamson mine operated by an affiliate of the Cline group, the exposure is spread out over a number of different mining operations and leases. Cline’s Williamson mine alone was responsible for approximately 13% of the Partnership’s total revenues for the first nine months of 2012.

12.    Incentive Plans

GP Natural Resource Partners LLC adopted the Natural Resource Partners Long-Term Incentive Plan (the “Long-Term Incentive Plan”) for directors of GP Natural Resource Partners LLC and employees of its affiliates who perform services for the Partnership. The Compensation, Nominating and Governance (“CNG”) Committee of GP Natural Resource Partners LLC’s board of directors administers the Long-Term Incentive Plan. Subject to the rules of the exchange upon which the common units are listed at the time, the board of directors and the CNG Committee of the board of directors have the right to alter or amend the Long-Term Incentive Plan or any part of the Long-Term Incentive Plan from time to time. Except upon the occurrence of unusual or nonrecurring events, no change in any outstanding grant may be made that would materially reduce the benefit intended to be made available to a participant without the consent of the participant.

Under the plan a grantee will receive the market value of a common unit in cash upon vesting. Market value is defined as the average closing price over the last 20 trading days prior to the vesting date. The CNG Committee may make grants under the Long-Term Incentive Plan to employees and directors containing such terms as it determines, including the vesting period. Outstanding grants vest upon a change in control of the Partnership, the general partner, or GP Natural Resource Partners LLC. If a grantee’s employment or membership on the board of directors terminates for any reason, outstanding grants will be automatically forfeited unless and to the extent the CNG Committee provides otherwise.

A summary of activity in the outstanding grants during 2012 is as follows:

Outstanding grants at January 1, 2012	870,760
Grants during the year	272,150
Grants vested and paid during the year	(189,736	)
Forfeitures during the year	(27,196	)
Outstanding grants at September 30, 2012	925,978

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Grants typically vest at the end of a four-year period and are paid in cash upon vesting. The liability fluctuates with the market value of the Partnership units and because of changes in estimated fair value determined each quarter using the Black-Scholes option valuation model. Risk free interest rates and volatility are reset at each calculation based on current rates corresponding to the remaining vesting term for each outstanding grant and ranged from 0.18% to 0.31% and 30.79% to 34.63%, respectively at September 30, 2012. The Partnership’s average distribution rate of 6.95% and historical forfeiture rate of 3.80% were used in the calculation at September 30, 2012. The Partnership recorded expenses related to its plan to be reimbursed to its general partner of $1.2 million and $0.6 million and $3.6 million and $6.1 million for the three and nine month periods ended September 30, 2012 and 2011, respectively. In connection with the Long-Term Incentive Plan, payments are typically made during the first quarter of the year. Payments of $6.6 million and $5.7 million were made during the nine month periods ended September 30, 2012 and 2011, respectively.

In connection with the phantom unit awards granted since February 2008, the CNG Committee also granted tandem Distribution Equivalent Rights, or DERs, which entitle the holders to receive distributions equal to the distributions paid on the Partnership’s common units. The DERs are payable in cash upon vesting but may be subject to forfeiture if the grantee ceases employment prior to vesting.

The unaccrued cost, associated with the unvested outstanding grants and related DERs at September 30, 2012, was $10.8 million.

13.    Distributions

On August 14, 2012, the Partnership paid a quarterly distribution $0.55 per unit to all holders of common units on August 3, 2012.

14.    Subsequent Events

The following represents material events that have occurred subsequent to September 30, 2012 through the time of the Partnership’s filing with the Securities and Exchange Commission:

Distributions

On October 17, 2012, the Partnership declared a distribution of $0.55 per unit to be paid on November 14, 2012 to unitholders of record on November 5, 2012.

Acquisition

Hi-Crush Override. On October 30, 2012 the Partnership acquired an overriding royalty interest in frac sand reserves located on approximately 561 acres near Wyeville, Wisconsin for approximately $15.0 million.

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

The following discussion of the financial condition and results of operations should be read in conjunction with the historical financial statements and notes thereto included elsewhere in this filing and the financial statements and footnotes included in the Natural Resource Partners L.P. Form 10-K, as filed on February 29, 2012.

Executive Overview

Our Business

We engage principally in the business of owning, managing and leasing mineral properties in the United States. We own coal reserves in the three major U.S. coal-producing regions: Appalachia, the Illinois Basin and the Western United States, as well as lignite reserves in the Gulf Coast region. As of December 31, 2011, we owned or controlled approximately 2.3 billion tons of proven and probable coal reserves, and we also owned approximately 380 million tons of aggregate reserves in a number of states across the country. We do not operate any mines, but lease our reserves to experienced mine operators under long-term leases that grant the operators the right to mine and sell our reserves in exchange for royalty payments.

Our revenue and profitability are dependent on our lessees’ ability to mine and market our reserves. Most of our coal is produced by large companies, many of which are publicly traded, with experienced and professional sales departments. A significant portion of our coal is sold by our lessees under coal supply contracts that have terms of one year or more. In contrast, our aggregate properties are typically mined by regional operators with significant experience and knowledge of the local markets. The aggregates are sold at current market prices, which historically have increased along with the producer price index for sand and gravel. Over the long term, both our coal and aggregate royalty revenues are affected by changes in the market for and the market price of the commodities.

In our coal and aggregate royalty business, our lessees generally make payments to us based on the greater of a percentage of the gross sales price or a fixed royalty per ton of coal or aggregates they sell, subject to minimum monthly, quarterly or annual payments. These minimum royalties are generally recoupable over a specified period of time, which varies by lease, if sufficient royalties are generated from production in those future periods. We do not recognize these minimum royalties as revenue until the applicable recoupment period has expired or they are recouped through production. Until recognized as revenue, these minimum royalties are recorded as deferred revenue, a liability on our balance sheet.

During the first nine months of 2012, we generated $78.6 million of our revenues from sources other than coal and aggregate royalty revenues, compared to $67.8 million for the same period in 2011. The 16% increase was primarily due to the recognition as revenue of $9.6 million in minimum royalties associated with the Gatling Ohio mine. We also recognized $8.5 million from the sale of assets, including $3.8 million from the sale of a right of way to the West Virginia Department of Highways for highway construction and $4.7 million from the sale of a preparation plant.

In addition to the minimums recognized as revenue and gains on sales of assets, other sources of revenue include: processing and transportation fees; oil and gas royalty revenue, overriding royalties; wheelage payments; rentals; property tax revenue; and timber sales. The processing and transportation fees and overriding royalties are primarily derived from the coal-related assets.

Our Current Liquidity Position

Our credit facility does not mature until August 2016 and, as of September 30, 2012, we had $197 million in available capacity under the facility. In addition to the amounts available under our credit facility, we had approximately $122 million in cash at September 30, 2012. We believe that the combination of our capacity under our credit facility and our cash on hand gives us enough liquidity to meet our current financial needs.

Other than a $35 million senior note that we intend to refinance prior to its maturity in 2013, we make annual principal payments on all our long-term debt. Although these annual payments will increase significantly beginning in 2013, we have no need to access the capital markets to pay off or refinance any of our senior note obligations other than the one note. As a result of our amortization program on our senior notes, our outstanding principal balance will be reduced on our long-term debt as our minerals are depleted. We do typically access the capital markets to refinance amounts outstanding under our credit facility as we approach the limits under that facility, the timing of which depends on the pace and size of our acquisition program.

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Current Results/Market Outlook

For the nine months ended September 30, 2012, our lessees produced 41.4 million tons of coal and aggregates, generating $198.1 million in royalty revenues from our properties, and our total revenues were $276.7 million. We continue to have substantial exposure to metallurgical coal, from which we derived approximately 44% of our coal royalty revenues and 33% of the related production. While the demand for domestic steel was strong over the first half of the year, it began to decline in the third quarter, and prices for metallurgical coal have dropped significantly over the last few months. Primarily as a result of lower metallurgical prices and demand, but also due to the continued weakness in the steam coal market, our coal royalty revenues from Central Appalachia declined materially in the third quarter as compared to the same quarter in 2011. However, over the nine months ended September 30, 2012, we saw the benefits of the diversity of our assets, with significant improvements in coal royalty revenues from our Illinois and Southern Appalachia properties offsetting much of the decline in Central Appalachia.

The market for steam coal remained soft as expected in the first nine months, with extremely low natural gas prices resulting in significant displacement of coal by gas for domestic power production. Further, the federal government regulations dealing with air quality at power plants have led to the announcement of planned closures of a number of coal-fired power plants, which will have an impact on future demand. In response to these events, a number of coal companies reduced their production in the first nine months of the year, which has resulted in lower production from our properties but has helped to sustain the prices received by our lessees. As natural gas prices have risen over the past few months, the demand for steam coal has showed signs of strengthening, particularly in the Powder River Basin and to some extent in the Illinois Basin, but we do not expect to see any material improvements in our results through the end of the year.

Growth Through Acquisitions

We have continued to diversify our holdings by expanding our coal presence in the Illinois Basin and through additional aggregates and other mineral acquisitions, including oil and gas royalties. In addition to the Oklahoma oil and gas properties we acquired over the first six months of 2012, in March we acquired a coal rail loadout and associated infrastructure in Illinois and entered into a lease with Sugar Camp Energy pursuant to which we receive throughput fees for coal transported through our facility. We also acquired a contractual overriding royalty at Cline’s Sugar Camp mine in Illinois following the start-up of the longwall operation at that mine.

In August 2012, we completed the final acquisition of reserves at Cline’s Deer Run mine in Hillsboro, Illinois for $40 million in connection with the start-up of the longwall unit at that mine. We have been receiving significant minimum royalty payments with respect to that mine, but anticipate that our revenues from the mine will increase substantially over the next year as the longwall unit ramps up production.

Political, Legal and Regulatory Environment

The political, legal and regulatory environment continues to be difficult for the coal industry. The Environmental Protection Agency, or EPA, has used its authority to create significant delays in the issuance of new permits and the modification of existing permits, which has led to substantial delays and increased costs for coal operators. In addition to its involvement in the permitting process, in December 2009, the EPA determined that six greenhouse gases, including carbon dioxide and methane, endanger the public health and welfare of current and future generations. In Coalition for Responsible Regulation v. EPA, several petitioners challenged the EPA’s findings, but in June 2012 the D.C. Circuit Court upheld all of the regulations promulgated by the EPA. The petitioners have appealed the ruling and have requested to have several issues in the case heard en banc, but the ruling was a significant victory for the EPA.

Over the past year, the industry has successfully challenged EPA policy, regulations and guidance in several other court decisions, including Mingo Logan Coal Co. v. EPA, National Mining Association v. Jackson, and EME Homer City Generation, L.P. v. EPA. While each of these cases has unique facts and circumstances, the general theme in these cases is that the EPA has overreached its authority in a number of instances. However, the EPA has continued to promulgate regulations that will negatively affect the viability of coal-fired generation, which will ultimately reduce coal consumption and the production of coal from our properties. Additionally, citizens’ groups have continued to be active in bringing lawsuits against operators, as well as challenging permits issued by the Army Corps of Engineers.

In addition to the increased oversight of the EPA, the Mine Safety and Health Administration, or MSHA, has increased its involvement in the approval of plans and enforcement of safety issues in connection with mining. MSHA’s involvement has increased the cost of mining due to more frequent citations and much higher fines imposed on our lessees as well as the overall cost of

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regulatory compliance. Combined with the difficult economic environment and the higher costs of mining in general, MSHA’s recent increased participation in the mine development process has reduced production from mines, caused some mines to be idled and has delayed the opening of new mines.

Distributable Cash Flow

Under our partnership agreement, we are required to distribute all of our available cash each quarter. Because distributable cash flow is a significant liquidity metric that is an indicator of our ability to generate cash flows at a level that can sustain or support an increase in quarterly cash distributions paid to our partners, we view it as the most important measure of our success as a company. Distributable cash flow is also the quantitative standard used in the investment community with respect to publicly traded partnerships.

Our distributable cash flow represents cash flow from operations, proceeds from sale of assets and return on direct financing lease and contractual override less actual principal payments and cash reserves set aside for scheduled principal payments on our senior notes. Although distributable cash flow is a “non-GAAP financial measure,” we believe it is a useful adjunct to net cash provided by operating activities under GAAP. Distributable cash flow is not a measure of financial performance under GAAP and should not be considered as an alternative to cash flows from operating, investing or financing activities. Distributable cash flow may not be calculated the same for NRP as for other companies. A reconciliation of distributable cash flow to net cash provided by operating activities is set forth below.

Reconciliation of GAAP “Net cash provided by operating activities”

to Non-GAAP “Distributable cash flow”

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2012			2011			2012			2011
	(In thousands) (Unaudited)
Net cash provided by operating activities	$	61,865		$	79,642		$	193,872		$	218,322
Less scheduled principal payments		(7,692	)		(7,692	)		(30,800	)		(31,518	)
Less reserves for future principal payments		(13,059	)		(7,700	)		(39,175	)		(23,459	)
Add reserves used for scheduled principal payments		7,692			7,692			30,800			31,518
Return on direct financing lease and contractual override		1,495			—			2,399			—
Proceeds from sale of assets		14,762			4,500			15,047			5,500
Distributable cash flow	$	65,063		$	76,442		$	172,143		$	200,363

Recent Acquisitions

We are a growth-oriented company and have closed a number of acquisitions over the last several years. Our most recent acquisitions are briefly described below.

Hi-Crush Override. On October 30, 2012 we acquired an overriding royalty interest in frac sand reserves located on approximately 561 acres near Wyeville, Wisconsin for approximately $15.0 million.

Colt. Between September 2009 and September 2012, we had acquired approximately 200 million tons of coal reserves related to the Deer Run Mine in Illinois from Colt, LLC, an affiliate of the Cline Group, for a total purchase price of $255 million.

Oklahoma Oil and Gas. From December 2011 through June 2012, we acquired approximately 19,200 net mineral acres located in the Mississippian Lime oil play in Northern Oklahoma for approximately $63.9 million.

Sugar Camp. In March 2012, we acquired the rail loadout associated infrastructure assets for $50.0 million and a contractual overriding royalty for $8.9 million interest on certain tonnage at the Sugar Camp mine in Illinois. The rail loadout and infrastructure assets were purchased from Sugar Camp Energy, LLC and the contractual overriding royalty interest was purchased from Ruger, LLC, both affiliates of the Cline Group.

Litz-Moore. In March 2012, we acquired metallurgical coal reserves adjacent to current NRP holdings in Virginia for $2.8 million.

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Royal. In July 2011, we acquired approximately 44,000 acres of coal reserves and coal bed methane located in Pennsylvania and Illinois from Royal Oil and Gas Corporation for $8.0 million.

NBR Sand. In June 2011, we acquired an overriding royalty interest in approximately 711 acres of frac sand reserves near Tyler, Texas for $16.5 million.

East Tennessee Materials. In March 2011, we acquired approximately 500 acres of mineral and surface rights related to limestone reserves in Cleveland, Tennessee near Chattanooga for $4.7 million.

CALX Resources. In February 2011, we acquired approximately 500 acres of mineral and surface rights related to limestone reserves on the Tennessee River near Paducah, Kentucky for $16.0 million.

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Results of Operations

	Three Months Ended September 30,				Increase (Decrease)			Percentage Change
	2012		2011
	(In thousands, except percent and per ton data) (Unaudited)
			(Restated)
Coal:
Coal royalty revenues
Appalachia
Northern	$	3,300	$	4,731	$	(1,431	)		(30	)%
Central		39,404		50,595		(11,191	)		(22	)%
Southern		9,672		1,554		8,118			522	%
Total Appalachia		52,376		56,880		(4,504	)		(8	)%
Illinois Basin		13,205		14,313		(1,108	)		(8	)%
Northern Powder River Basin		4,493		3,622		871			24	%
Gulf Coast		185		161		24			15	%
Total	$	70,259	$	74,976	$	(4,717	)		(6	)%
Production (tons)
Appalachia
Northern		1,814		1,156		658			57	%
Central		6,590		7,406		(816	)		(11	)%
Southern		1,159		290		869			300	%
Total Appalachia		9,563		8,852		711			8	%
Illinois Basin		2,907		3,084		(177	)		(6	)%
Northern Powder River Basin		853		1,119		(266	)		(24	)%
Gulf Coast		17		80		(63	)		(79	)%
Total		13,340		13,135		205			2	%
Average gross royalty per ton
Appalachia
Northern	$	1.82	$	4.09	$	(2.27	)		(56	)%
Central		5.98		6.83		(0.85	)		(12	)%
Southern		8.35		5.36		2.99			56	%
Total Appalachia		5.48		6.43		(0.95	)		(15	)%
Illinois Basin		4.54		4.64		(0.10	)		(2	)%
Northern Powder River Basin		5.27		3.24		2.03			63	%
Gulf Coast		10.88		2.01		8.87			441	%
Combined average gross royalty per ton	$	5.27	$	5.71	$	(0.44	)		(8	)%
Aggregate:
Royalty revenues	$	1,643	$	2,099	$	(456	)		(22	)%
Production		1,239		1,682		(443	)		(26	)%
Average base royalty per ton	$	1.33	$	1.25	$	0.08			6	%
Oil and Gas:
Oil and gas royalties	$	1,246	$	5,059	$	(3,813	)		(75	)%

Coal Royalty Revenues and Production. Coal royalty revenues comprised approximately 75% and 73% of our total revenue for the three month periods ended September 30, 2012 and 2011, respectively. The following is a discussion of the coal royalty revenues and production derived from our major coal producing regions:

Appalachia. Coal royalty revenues decreased $4.5 million in the three month period ended September 30, 2012 compared to the same period of 2011 while production increased 8%. As a result of the difficult coal markets, production in the Central Appalachian region declined significantly as some lessees chose to idle mines or mining units during the quarter in addition to the effect of mines moving on and off our property. In general, pricing realized by the lessees for both steam and metallurgical coal was below the levels of the same quarter in 2011, causing a slightly higher percentage decrease in coal royalty revenue.

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In contrast to Central Appalachia, the Southern Appalachian region had increased production and coal royalty revenue, primarily due to the Oak Grove preparation plant operating for the entire quarter after being idled for an extended period beginning in the second quarter of 2011 due to damage caused by a tornado. In addition, our BLC property had an overall increase in tonnage and revenue due to one lessee improving its production and another lessee moving onto our property.

With respect to Northern Appalachia, during the quarter ending September 30, 2012, 661,000 tons were produced on a 1960s era coal lease where little or no production had occurred since our formation, and where the royalty rate per ton is very low. The production from this low rate lease caused the overall decrease in the average royalty per ton for Northern Appalachia to be negatively skewed. Except for this lease, production would have been nearly equal but coal royalty revenue would still have decreased due to the idling of the Gatling Ohio mine in the fourth quarter of 2011, which had a high per ton royalty. In addition, a lessee on our Beaver Creek property, which primarily produces metallurgical coal, had lower sales in the quarter, contributing to the lower per ton royalty.

Illinois Basin. Production and coal royalty revenue decreased for the three months ended September 30, 2012 compared to the same period in 2011. The production decrease was primarily due to sales from the Macoupin and Williamson mines being lower during the quarter than in the same quarter of the prior year as a result of the weak coal market. The reduced production and sales from Williamson and Macoupin were partially offset by the production from Deer Run mine, which began in the fourth quarter of 2011.

Northern Powder River Basin. Coal royalty revenues increased despite lower production on our Western Energy property due to the lessee having an adjustment to its sales price to its customer for prior periods, raising the amount on which our percentage royalty is based.

Aggregate Royalty Revenues and Production. Aggregate revenue and production decreased for the quarter ended September 30, 2012, primarily due to weak market conditions at our larger producing properties as well as delays in starting up operations on several of our greenfield developments.

Oil and Gas Royalty Revenues. Oil and gas royalty revenues decreased $3.8 million when compared to the three months ended September 30, 2011, primarily due to low gas prices resulting in lower royalties, reduced production and reduced leasing activity causing lower bonus royalty revenue. In addition, the development of our recently acquired Oklahoma properties is not expected to contribute materially to our revenues until 2014.

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	Nine Months Ended September 30,				Increase (Decrease)			Percentage Change
	2012		2011
	(In thousands, except percent and per ton data) (Unaudited)
			(Restated)
Coal:
Coal royalty revenues
Appalachia
Northern	$	10,996	$	14,592	$	(3,596	)		(25	)%
Central		119,880		151,156		(31,276	)		(21	)%
Southern		20,694		9,742		10,952			112	%
Total Appalachia		151,570		175,490		(23,920	)		(14	)%
Illinois Basin		34,886		29,598		5,288			18	%
Northern Powder River Basin		6,264		6,135		129			2	%
Gulf Coast		333		360		(27	)		(8	)%
Total	$	193,053	$	211,583	$	(18,530	)		(9	)%
Production (tons)
Appalachia
Northern		5,866		3,530		2,336			66	%
Central		19,632		22,756		(3,124	)		(14	)%
Southern		2,547		1,410		1,137			81	%
Total Appalachia		28,045		27,696		349			1	%
Illinois Basin		7,908		7,118		790			11	%
Northern Powder River Basin		1,447		2,024		(577	)		(29	)%
Gulf Coast		37		271		(234	)		(86	)%
Total		37,437		37,109		328			1	%
Average gross royalty per ton
Appalachia
Northern	$	1.87	$	4.13	$	(2.26	)		(55	)%
Central		6.11		6.64		(0.54	)		(8	)%
Southern		8.12		6.91		1.22			18	%
Total Appalachia		5.40		6.34		(0.93	)		(15	)%
Illinois Basin		4.41		4.16		0.25			6	%
Northern Powder River Basin		4.33		3.03		1.30			43	%
Gulf Coast		9.00		1.33		7.67			578	%
Combined average gross royalty per ton	$	5.16	$	5.70	$	(0.54	)		(10	)%
Aggregate:
Royalty revenues	$	5,061	$	5,030	$	31			1	%
Aggregate royalty bonus	$	—	$	94		(94	)		(100	)%
Production		4,053		4,618		(565	)		(12	)%
Average base royalty per ton	$	1.25	$	1.09		0.16			15	%
Oil and Gas:
Oil and gas royalties	$	6,712	$	10,047	$	(3,335	)		(33	)%

Coal Royalty Revenues and Production. Coal royalty revenues comprised approximately 70% and 74% of our total revenue for each of the nine month periods ended September 30, 2012 and 2011, respectively. The following is a discussion of the coal royalty revenues and production derived from our major coal producing regions:

Appalachia. Coal royalty revenues decreased in the nine month period ended September 30, 2012 compared to the same period of 2011, while production increased. As a result of the difficult coal markets, production in the Central Appalachian region declined significantly as some lessees chose to idle mines or mining units during the quarter in addition to the net effect of mines moving on and off our property. In general, pricing realized by the lessees was at or below the levels of the same period in 2011, causing a slightly higher percentage decrease in coal royalty revenue.

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In contrast to Central Appalachia, the Southern Appalachian region had increased production and coal royalty revenue, primarily due to the Oak Grove preparation plant operating for the nearly entire nine month period after being idled for an extended period beginning in the second quarter of 2011 due to damage caused by a tornado. In addition, our BLC property had an overall increase in tonnage and revenue due to one lessee improving its production and another lessee moving onto our property.

With respect to Northern Appalachia, during the nine months ending September 30, 2012, we had approximately 2.4 million tons of production on a 1960s era coal lease in Northern Appalachia where little or no production had occurred since our formation, and where the royalty rate per ton is very low. The production from this low rate lease caused the overall decrease in the average royalty per ton for Northern Appalachia to be negatively skewed. Except for this lease, production would have been nearly equal but coal royalty revenue would still have decreased due to the idling of the Gatling Ohio mine in the fourth quarter of 2011, which had a high per ton royalty. In addition, a lessee on our Beaver Creek property, which primarily produces metallurgical coal, had lower sales in the quarter, contributing to the lower per ton royalty.

Illinois Basin. Production and coal royalty revenue increased for the nine months ended September 30, 2012 compared to the same period in 2011. The increased production and revenue was primarily due to start of production at the Deer Run mine in the fourth quarter of 2011, and the start of the longwall unit at that mine in August of 2012.

Northern Powder River Basin. Coal royalty revenues increased, while production decreased on our Western Energy property due to the lessee having an adjustment to its sales price to its customer, raising the amount on which our percentage royalty is based.

Aggregates Royalty Revenues and Production. Aggregate production decreased and revenue increased for the nine months ended September 30, 2012, primarily due to some operations reducing production in response to market conditions. The revenue per ton increased due to the more production coming from properties with higher royalty rates.

Oil and Gas Royalty Revenues. Oil and gas royalty revenues decreased $3.3 million when compared to the nine months ended September 30, 2011, primarily due to low gas prices resulting in lower royalties, reduced production and reduced leasing activity causing lower bonus royalty revenue. In addition, the development of our recently acquired Oklahoma properties is not expected to contribute materially to our revenues until 2014.

Other Operating Results

In addition to coal and aggregate royalty revenues, we generated approximately 28% of our first nine months of 2012 revenues from other sources, as compared to 24% for the same period of 2011. Other sources of revenue typically include: minimums recognized as revenue; processing and transportation fees; overriding royalties; wheelage payments; rentals; property tax revenue; and timber sales. In the first nine months of 2012, we realized $13.7 million in minimums recognized as revenue, of which $9.6 million was attributable to an agreement in 2012 by Gatling Ohio, LLC to relinquish its recoupment rights, resulting in current year revenue recognition. We also recognized other revenue of $3.8 million in the second quarter from the sale of a right of way to the West Virginia Department of Highways for highway construction, and we recognized $4.7 million in revenue in the third quarter from the sale of a preparation plant.

Processing and Transportation Revenues. We generated $1.6 million and $4.0 million in processing revenues for the quarters ended September 30, 2012 and 2011, respectively, and $6.9 million and $10.2 million for the nine months ended September 30, 2012 and 2011, respectively. We own but do not operate the preparation plants, and receive a fee for minerals processed through them. The decrease in processing fees was a result of lower Central Appalachian production from the properties that use these facilities to wash their coal.

In addition to our preparation plants, we own handling and transportation infrastructure. In contrast to our typical royalty structure, we receive a fixed rate per ton for coal transported over these facilities. At the Williamson mine in Illinois, we operate handling and transportation infrastructure and have subcontracted out that responsibility to third parties. At the Shay No. 1 mine and the Sugar Camp mine, we own the infrastructure and lease it to Cline affiliates. We generated transportation fees from these assets of approximately $5.0 million and $4.8 million for the quarters ended September 30, 2012 and 2011, respectively, and $14.4 million and $12.6 million for the nine months ended September 30, 2012 and 2011, respectively. The increase in our transportation revenue is due to increased production on our Illinois Basin properties.

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Operating costs and expenses. Included in total expenses are:

• Depreciation, depletion and amortization of $14.5 million and $19.8 million for the quarters ended September 30, 2012 and 2011, respectively, and $42.1 million and $51.6 million for the nine months ended September 30, 2012 and 2011, respectively. Depletion and amortization decreased approximately $5.3 million for the three months ended September 30, 2012 and $9.5 million for the nine months ended September 30, 2012. The decrease was primarily related to assets acquired from Gatling, LLC and Gatling Ohio, LLC that were impaired during the third and fourth quarters of 2011.

• General and administrative expenses were $8.2 million and $5.5 million for the quarters ended September 30, 2012 and 2011, respectively, and $24.2 million and $22.2 million for the nine months ended September 30, 2012 and 2011, respectively. The change in general and administrative expense is due to salaries for additional employees and consulting fees, offset by lower accruals for our long-term incentive plan attributable to our lower unit price.

Interest Expense. Interest expense increased approximately $0.9 million for the three months ended September 30, 2012 and $5.0 million for the nine month period ended September 30, 2012 over the same periods in 2011. The increase reflects the issuance of new senior notes during 2011 at higher interest rates than our credit facility and additional borrowings outstanding on our credit facility in 2012.

Liquidity and Capital Resources

Cash Flows and Capital Expenditures

We satisfy our working capital requirements with cash generated from operations. Since our initial public offering, we have financed our property acquisitions with available cash, borrowings under our revolving credit facility, and the issuance of our senior notes and additional units. While our ability to satisfy our debt service obligations and pay distributions to our unitholders depends in large part on our future operating performance, our ability to make acquisitions will depend on prevailing economic conditions in the financial markets as well as the coal and aggregate industries and other factors, some of which are beyond our control. Our capital expenditures, other than for acquisitions, have historically been minimal.

Our credit ratios are within our debt covenants for both our credit facility and our outstanding senior notes. In addition, we are amortizing substantially all of our senior notes and have no immediate need to refinance. For a more complete discussion of factors that will affect our liquidity, please read “Item 1A. Risk Factors” in our Form 10-K for the year ended December 31, 2011. As of September 30, 2012, we had $197 million in available capacity under our credit facility and we also had approximately $122 million of cash. Our $35.0 million 5.55% senior note is due within the next twelve months. We intend to refinance this note at or prior to maturity.

Net cash provided by operations for the nine months ended September 30, 2012 and 2011 was $193.9 million and $218.3 million, respectively. The most significant portion of our cash provided by operations is generated from coal royalty revenues.

Net cash used in investing activities for the nine months September 30, 2012 and 2011 was $176.7 million and $102.3 million, respectively. Substantially all of our investing activities consisted of acquiring reserves, plant and equipment and other rights.

Net cash flows used in financing activities for the nine months ended September 30, 2012 was $109.7 million. During the first nine months of 2012, we had proceeds from loans of $103.0 million, offset by repayment of debt of $30.8 million and distributions paid of $181.3 million. During the same period for 2011, net cash used in financing activities was $61.4 million, which included proceeds from loans of $335.0 million offset by debt repayments of $210.5 million, $175.3 million for distributions to partners and repayments of obligations related to acquisitions of $7.6 million.

Contractual Obligations and Commercial Commitments

Credit Facility. As of the date of this report we had $182 million available to us under the facility. Under an accordion feature in the credit facility, we may request our lenders to increase their aggregate commitment to a maximum of $500 million on the same terms. However, we cannot be certain that our lenders will elect to participate in the accordion feature. To the extent the lenders decline to participate, we may elect to bring new lenders into the facility, but cannot make any assurance that the additional credit capacity will be available to us on existing or comparable terms.

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During 2012, our borrowings and repayments under our credit facility were as follows:

	Quarter Ending
	March 31		June 30		September 30
	(In thousands) (Unaudited)
Outstanding balance, beginning of period	$	—	$	47,000	$	73,000
Borrowings under credit facility		47,000		26,000		30,000
Less: Repayments under credit facility		—		—		—
Outstanding balance, ending period	$	47,000	$	73,000	$	103,000

Our obligations under the credit facility are unsecured but are guaranteed by our operating subsidiaries. We may prepay all loans at any time without penalty. Indebtedness under the revolving credit facility bears interest, at our option, at either:

• the Alternate Base Rate (as defined in the credit agreement) plus an applicable margin ranging from 0% to 1%; or

• the Adjusted LIBO Rate (as defined in the credit agreement) plus an applicable margin ranging from 1.00% to 2.25%.

We incur a commitment fee on the unused portion of the revolving credit facility at a rate ranging from 0.18% to 0.40% per annum.

The credit agreement contains covenants requiring us to maintain:

• a ratio of consolidated indebtedness to consolidated EBITDDA (as defined in the credit agreement) not to exceed 4.0 to 1.0; and

• a ratio of consolidated EBITDDA to consolidated fixed charges (consisting of consolidated interest expense and consolidated lease operating expense) not less than 3.5 to 1.0.

Senior Notes. NRP (Operating) LLC issued the senior notes listed below under a note purchase agreement as supplemented from time to time. The senior notes are unsecured but are guaranteed by our operating subsidiaries. We may prepay the senior notes at any time together with a make-whole amount (as defined in the note purchase agreement). If any event of default exists under the note purchase agreement, the noteholders will be able to accelerate the maturity of the senior notes and exercise other rights and remedies.

The senior note purchase agreement contains covenants requiring our operating subsidiary to:

• Maintain a ratio of consolidated indebtedness to consolidated EBITDDA (as defined in the note purchase agreement) of no more than 4.0 to 1.0 for the four most recent quarters;

• not permit debt secured by certain liens and debt of subsidiaries to exceed 10% of consolidated net tangible assets (as defined in the note purchase agreement); and

• maintain the ratio of consolidated EBITDDA to consolidated fixed charges (consisting of consolidated interest expense and consolidated operating lease expense) at not less than 3.5 to 1.0.

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Long-Term Debt

As of the date of this filing, our debt consisted of:

• $118.0 million of our $300 million floating rate revolving credit facility, due August 2016;

• $35.0 million of 5.55% senior notes due 2013;

• $27.7 million of 4.91% senior notes due 2018;

• $150.0 million of 8.38% senior notes due 2019;

• $61.5 million of 5.05% senior notes due 2020;

• $1.7 million of 5.31% utility local improvement obligation due 2021;

• $30.3 million of 5.55% senior notes due 2023;

• $75.0 million of 4.73% senior notes due 2023;

• $180.0 million of 5.82% senior notes due 2024;

• $50.0 million of 8.92% senior notes due 2024;

• $175.0 million of 5.03% senior notes due 2026; and

• $50.0 million of 5.18% senior notes due 2026.

Other than the 5.55% senior notes due 2013, which have only semi-annual interest payments, all of our senior notes require annual principal payments in addition to semi-annual interest payments. The scheduled principal payments on the 8.38% senior notes due in 2019 do not begin until March 2013, the scheduled principal payments on the 8.92% senior notes due in 2024 do not begin until March 2014, and the scheduled principal payments on the 4.73%, 5.03% and 5.18% senior notes do not begin until December 2014. We also make annual principal and interest payments on the utility local improvement obligation.

Shelf Registration Statement

In addition to our credit facility, on April 24, 2012 we filed an automatically effective shelf registration statement on Form S-3 with the SEC that is available for registered offerings of common units and debt securities. This shelf replaced our previous shelf registration statement, which expired at the end of February 2012. On August 15, 2012, we filed another shelf registration statement that registered all of the units held by Adena Minerals, as well as up to $500 million in equity or debt securities by NRP. Following the effectiveness of this registration statement, Adena distributed 6,049,155 common units to its shareholders, and we subsequently filed a prospectus supplement to register the resale of these units by those shareholders. We cannot control the resale of the common units by Adena or its shareholders, and the amounts, prices and timing of the issuance and sale of any equity or debt securities by NRP will depend on market conditions, our capital requirements and compliance with our credit facility and senior notes.

Off-Balance Sheet Transactions

We do not have any off-balance sheet arrangements with unconsolidated entities or related parties and accordingly, there are no off-balance sheet risks to our liquidity and capital resources from unconsolidated entities.

Related Party Transactions

Reimbursements to our General Partner

Our general partner does not receive any management fee or other compensation for its management of Natural Resource Partners L.P. However, in accordance with our partnership agreement, we reimburse our general partner and its affiliates for expenses incurred on our behalf. All direct general and administrative expenses are charged to us as incurred. We also reimburse indirect general and administrative costs, including certain legal, accounting, treasury, information technology, insurance, administration of employee benefits and other corporate services incurred by our general partner and its affiliates. We had an amount payable to Quintana Minerals Corporation of $0.3 million at September 30, 2012 for services provided by Quintana to NRP. We also had a payable of $0.3 million to Western Pocahontas Properties for an overriding royalty interest on one of our leases. Cost reimbursements due to our general partner may be substantial and will reduce our cash available for distribution to unitholders.

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The reimbursements to our general partner for services performed by Western Pocahontas Properties and Quintana Minerals Corporation are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)
Reimbursement for services	$	2,303	$	2,050	$	7,230	$	6,203

For additional information, please read “Certain Relationships and Related Transactions, and Director Independence — Omnibus Agreement” in our annual report filed on Form 10-K for the year ended December 31, 2011.

We also lease an office building in Huntington, West Virginia from Western Pocahontas at market rates. The terms of the lease were approved by our Conflicts Committee. We pay $0.6 million each year in lease payments.

Cline Affiliates

Various companies controlled by Chris Cline lease coal reserves from NRP, and we provide coal transportation services to them for a fee. Mr. Cline, both individually and through another affiliate, Adena Minerals, LLC, owns a 31% interest in NRP’s general partner, as well as 12,617,673 common units. Revenues from Cline affiliates are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)
			(Restated)				(Restated)
Coal royalty revenues	$	12,894	$	14,790	$	34,351	$	30,673
Processing fees		715		885		1,745		2,078
Transportation fees		5,008		4,765		14,362		12,609
Minimums recognized as revenue		—		—		9,556		—
Override revenue		1,075		704		2,768		1,384
Other revenue		—		—		—		2,990
	$	19,692	$	21,144	$	62,782	$	49,734

At September 30, 2012, we had amounts due from Cline affiliates totaling $62.9 million, of which $57.3 million was attributable to agreements relating to the recent Sugar Camp acquisition. As of September 30, 2012, we had received $57.7 million in minimum royalty payments to date that have not been recouped by Cline affiliates, of which $20.8 million was received in the current year. The $9.6 million in minimums recognized as revenue during the first nine months of 2012 was attributable to an agreement in 2012 by Gatling Ohio, LLC to relinquish its recoupment rights.

During 2011, we recognized a $3.0 million gain on a reserve exchange of over one million tons in Illinois with Williamson Energy. The fair value of the reserves was estimated using Level 3 cash flow approach. The expected cash flows were developed using estimated annual sales tons, forecasted sales prices and anticipated market royalty rates. The tons received will be fully mined during 2012, while the tons exchanged are not included in the current mine plans. The gain is included in Other revenues on the Consolidated Statements of Comprehensive Income.

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Quintana Capital Group GP, Ltd.

Corbin J. Robertson, Jr. is a principal in Quintana Capital Group GP, Ltd., which controls several private equity funds focused on investments in the energy business. In connection with the formation of Quintana Capital, we adopted a formal conflicts policy that establishes the opportunities that will be pursued by NRP and those that will be pursued by Quintana Capital. The governance documents of Quintana Capital’s affiliated investment funds reflect the guidelines set forth in NRP’s conflicts policy.

A fund controlled by Quintana Capital owns a significant membership interest in Taggart Global USA, LLC, including the right to nominate two members of Taggart’s 5-person board of directors. We own and lease preparation plants to Taggart Global, which designed, built and operates the plants. The lease payments are based on the sales price for the coal that is processed through the facilities. During the third quarter, we sold a preparation plant to Taggart for $12.3 million. We received $10.5 million in cash and a note receivable from Taggart payable over three years for the balance. As a result of the sale, we recorded a gain of $4.7 million included in Other income in the Consolidated Statements of Comprehensive Income. The note receivable balance at September 30, 2012 was $1.8 million.

We currently lease three facilities to Taggart. Revenues from Taggart are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)				(In thousands) (Unaudited)
Processing revenues	$	664	$	2,962	$	4,321	$	7,587

At September 30, 2012, we had accounts receivable totaling $0.7 million from Taggart.

In June 2007, a fund controlled by Quintana Capital acquired Kopper-Glo, a small coal mining company that is one of our lessees with operations in Tennessee. Revenues from Kopper-Glo are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)				(In thousands) (Unaudited)
Coal royalty revenues	$	996	$	440	$	2,594	$	1,192

We also had accounts receivable totaling $0.4 million from Kopper-Glo at September 30, 2012.

Environmental

The operations our lessees conduct on our properties are subject to environmental laws and regulations adopted by various governmental authorities in the jurisdictions in which these operations are conducted. As an owner of coal reserves, as well as surface interests in some properties, we may be liable for environmental conditions occurring at our properties. The terms of substantially all of our leases require the lessee to comply with all applicable laws and regulations, including environmental laws and regulations. Lessees post reclamation bonds assuring that reclamation will be completed as required by the relevant permit, and substantially all of the leases require the lessee to indemnify us against, among other things, environmental liabilities. Some of these indemnifications survive the termination of the lease. We make regular visits to the mines to ensure compliance with lease terms, but the duty to comply with all regulations rests with the lessees. We believe that our lessees will be able to comply with existing regulations and do not expect any lessee’s failure to comply with environmental laws and regulations to have a material impact on our financial condition or results of operations. We also carry pollution liability insurance, and West Virginia has established a fund to satisfy any shortfall in our lessees’ reclamation obligations, but this fund may not be sufficient to cover our costs in the event we are determined to be responsible for environmental contamination.

Our lessees regularly conduct reclamation work on the properties under lease to them. Because we are not the permittee of the operations on our properties, we are not responsible for the costs associated with the reclamation. However, we have received a

30

Notice of Intent to File a Citizen Suit in connection with alleged selenium discharges from one of our properties in West Virginia. Mining has now ceased on the property, but was originally conducted by Pittston Coal Company, which assigned the lease to Massey Energy, which subsequently merged with Alpha Natural Resources. The reclamation has been completed and the permits and bonding have been released, leading the plaintiffs to name us as the party responsible for the alleged discharge since we are the current owners of the property. Several other landowners have recently received similar notices, but these are the first instances of which we are aware that have targeted landowners rather than the mining companies. As of September 30, 2012, we had not been sued in connection with the notice. Although this particular litigation, if filed, would not be material to NRP, to the extent that we are not successful in defending these types of claims, do not receive indemnity under our leases or the claims are not covered by our pollution liability insurance, or to the extent that these types of claims become more pervasive in the future, these issues could become material to NRP.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We are exposed to market risk, which includes adverse changes in commodity prices and interest rates as discussed below:

Commodity Price Risk

We are dependent upon the effective marketing and efficient mining of our coal reserves by our lessees. Our lessees sell coal under various long-term and short-term contracts as well as on the spot market. A large portion of these sales are under long-term contracts. A substantial or extended decline in coal prices could materially and adversely affect us in two ways. First, lower prices may reduce the quantity of coal that may be economically produced from our properties. This, in turn, could reduce our coal royalty revenues and the value of our coal reserves. Second, even if production is not reduced, the royalties we receive on each ton of coal sold may be reduced. Additionally, volatility in coal prices could make it difficult to estimate with precision the value of our coal reserves and any coal reserves that we may consider for acquisition.

Interest Rate Risk

Our exposure to changes in interest rates results from our borrowings under our revolving credit facility, which are subject to variable interest rates based upon LIBOR. At September 30, 2012, we had $103.0 million in variable interest rate debt.

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Item 4. Controls and Procedures

NRP carried out an evaluation of the effectiveness of the design and operation of its disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act) as of the end of the period covered by this report. This evaluation was performed under the supervision and with the participation of NRP management, including the Chief Executive Officer and Chief Financial Officer of the general partner of the general partner of NRP. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that these disclosure controls and procedures are effective in providing reasonable assurance that (a) the information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms, and (b) such information is accumulated and communicated to our management, including our CEO and CFO, as appropriate to allow timely decisions regarding required disclosure.

No changes were made to our internal control over financial reporting during the last fiscal quarter that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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Part II. Other Information

Item 1. Legal Proceedings

We are involved, from time to time, in various legal proceedings arising in the ordinary course of business. While the ultimate results of these proceedings cannot be predicted with certainty, our management believes these claims will not have a material effect on our financial position, liquidity or operations.

Item 1A. Risk Factors

During the period covered by this report, there were no material changes from the risk factors previously disclosed in Natural Resource Partners L.P.’s Form 10-K for the year ended December  31, 2011.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

None.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

None.

Item 5. Other Information

None.

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Item 6. Exhibits

31.1*	—	Certification of Chief Executive Officer pursuant to Section 302 of Sarbanes-Oxley.
31.2*	—	Certification of Chief Financial Officer pursuant to Section 302 of Sarbanes-Oxley.
32.1*	—	Certification of Chief Executive Officer pursuant to 18 U.S.C. § 1350.
32.2*	—	Certification of Chief Financial Officer pursuant to 18 U.S.C. § 1350.
101*	—	The following financial information from the quarterly report on Form 10-Q of Natural Resource Partners L.P. for the quarter ended September 30, 2012, formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Income, (iii) Consolidated Statements of Cash Flows, and (iv) Notes to Consolidated Financial Statements, tagged as blocks of text.

* Submitted herewith.

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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 and thereunto duly authorized.

	NATURAL RESOURCE PARTNERS L.P.
	By:	NRP (GP) LP, its general partner
	By:	GP NATURAL RESOURCE
		PARTNERS LLC, its general partner
Date: November 7, 2012
	By:                                     /s/ Corbin J. Robertson, Jr.
		Corbin J. Robertson, Jr.,
		Chairman of the Board and
		Chief Executive Officer
		(Principal Executive Officer)
Date: November 7, 2012
	By:                                      /s/ Dwight L. Dunlap
		Dwight L. Dunlap,
		Chief Financial Officer and
		Treasurer
		(Principal Financial Officer)
Date: November 7, 2012
	By:                                     /s/ Kenneth Hudson
		Kenneth Hudson
		Controller
		(Principal Accounting Officer)

35

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

I, Corbin J. Robertson, Jr., certify that:

1) I have reviewed this report on Form 10-Q of Natural Resource Partners L.P.

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 (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

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.

By:

/s/ Corbin J. Robertson, Jr.

Corbin J. Robertson, Jr.

Chief Executive Officer

Date: November 7, 2012

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

I, Dwight L. Dunlap, certify that:

1) I have reviewed this report on Form 10-Q of Natural Resource Partners L.P.

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 (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

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.

By:

/s/ Dwight L. Dunlap

Dwight L. Dunlap

Chief Financial Officer and Treasurer

Date: November 7, 2012

EX-32.1

Exhibit 32.1

CERTIFICATION OF

CHIEF EXECUTIVE OFFICER

OF GP NATURAL RESOURCE PARTNERS LLC

PURSUANT TO 18 U.S.C. § 1350

In connection with the accompanying report on Form 10-Q for the quarter ended September 30, 2012 filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Corbin J. Robertson, Jr., Chief Executive Officer and Chairman of the Board of GP Natural Resource Partners LLC, the general partner of the general partner of Natural Resource Partners L.P. (the “Company”), hereby certify, to my knowledge, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; 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/ Corbin J. Robertson, Jr.

Name: Corbin J. Robertson, Jr.

Date:   November 7, 2012

EX-32.2

Exhibit 32.2

CERTIFICATION OF

CHIEF FINANCIAL OFFICER

OF GP NATURAL RESOURCE PARTNERS LLC

PURSUANT TO 18 U.S.C. § 1350

In connection with the accompanying report on Form 10-Q for the year ended September 30, 2012 filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Dwight L. Dunlap, Chief Financial Officer and Treasurer of GP Natural Resource Partners LLC, the general partner of the general partner of Natural Resource Partners L.P. (the “Company”), hereby certify, to my knowledge, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; 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/ Dwight L. Dunlap
Name:	Dwight L. Dunlap
Date:	November 7, 2012

XML

Long-Term Debt - Principal Payments Due (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
Debt Instrument [Line Items]
Remainder of 2012
2013	87,230
2014	80,983
2015	80,983
2016	183,983
Thereafter	506,090
Principal payments	939,269
Senior Notes [Member]
Debt Instrument [Line Items]
Remainder of 2012
2013	87,230
2014	80,983
2015	80,983
2016	80,983
Thereafter	506,090
Principal payments	836,269
Credit Facility [Member]
Debt Instrument [Line Items]
Remainder of 2012
2016	103,000
Principal payments	$ 103,000

XML

Incentive Plans - Summary of Activity in Outstanding Grants (Detail)	9 Months Ended
	Sep. 30, 2012
Unit Based Compensation Arrangement [Line Items]
Outstanding grants at January 1, 2012	870,760
Grants during the year	272,150
Grants vested and paid during the year	(189,736)
Forfeitures during the year	(27,196)
Outstanding grants at September 30, 2012	925,978

XML

Major Lessees - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2012
Operating Leases, Income Statement, Lease Revenue [Line Items]
Minimum Percentage of revenue derived from major two lessees	46.00%
The Cline Group [Member]
Operating Leases, Income Statement, Lease Revenue [Line Items]
Percentage of revenue derived from major lessee	13.00%

XML

Plant and Equipment - Additional Information (Detail) (USD $)			9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Taggart Global USA, LLC [Member]
Partnership sold preparation plant			$ 12,300,000
Partnership received			10,500,000
Note receivable balance	1,808,000		1,800,000
Gain recorded on partnership			4,700,000
Net Book Value of the asset sold	$ 33,968,000	$ 46,185,000	$ 7,600,000

XML

Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2012

Long-Term Debt

Long-term debt consists of the following:

	September 30, 2012			December 31, 2011
	(In thousands)
$300 million floating rate revolving credit facility, due August 2016	$	103,000		$	—
5.55% senior notes, with semi-annual interest payments in June and December, maturing June 2013		35,000			35,000
4.91% senior notes, with semi-annual interest payments in June and December, with annual principal payments in June, maturing in June 2018		27,700			32,317
8.38% senior notes, with semi-annual interest payments in March and September, with scheduled principal payments beginning March 2013, maturing in March 2019		150,000			150,000
5.05% senior notes, with semi-annual interest payments in January and July, with annual principal payments in July, maturing in July 2020		61,538			69,230
5.31% utility local improvement obligation, with annual principal and interest payments, maturing in March 2021		1,731			1,922
5.55% senior notes, with semi-annual interest payments in June and December, with annual principal payments in June, maturing in June 2023		30,300			33,600
4.73% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2023		75,000			75,000
5.82% senior notes, with semi-annual interest payments in March and September, with annual principal payments in March, maturing in March 2024		180,000			195,000
8.92% senior notes, with semi-annual interest payments in March and September, with scheduled principal payments beginning March 2014, maturing in March 2024		50,000			50,000
5.03% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2026		175,000			175,000
5.18% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2026		50,000			50,000
Total debt		939,269			867,069
Less – current portion of long term debt		(87,230	)		(30,801	)
Long-term debt	$	852,039		$	836,268

Principal Payments Due

Principal payments due in:

	Senior Notes		Credit Facility		Total
	(In thousands)
Remainder of 2012	$	—	$	—	$	—
2013		87,230		—		87,230
2014		80,983		—		80,983
2015		80,983		—		80,983
2016		80,983		103,000		183,983
Thereafter		506,090		—		506,090
	$	836,269	$	103,000	$	939,269

XML

Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], USD $)	Oct. 17, 2012	Oct. 30, 2012 Hi-Crush Override [Member] acre
Subsequent Event [Line Items]
Distributions per unit declared	0.55
Area of frac sand reserve acquired		561
Amount paid		$ 15,000,000

XML

Related Party Transactions - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2012 PartnershipUnit	Sep. 30, 2011 T	Dec. 31, 2011
Related Party Transaction [Line Items]
Lease expenses	$ 600,000
Accounts receivable from related party	10,077,000		10,138,000
Unrecouped minimum royalty payments	57,700,000
Proceeds from royalty payments in current year	20,800,000
Gain on partnership		3,000,000
Reserve exchange		1,000,000
Membership interest description	Right to nominate two members of Taggart's 5-person board of directors
Note receivable balance	1,808,000
Number of companies acquired	3
Cline Affiliates Member
Related Party Transaction [Line Items]
Rate of interest in the partnerships general partner	31.00%
Related party transaction number of units hold by the related party in partnerships' general partner	12,617,673
Accounts receivable from related party	62,900,000
Contractual overriding agreement payment relating to acquisition	57,300,000
Minimums recognized to relinquish recoupment rights	9,600,000
Kopper-Glo [Member]
Related Party Transaction [Line Items]
Accounts receivable from related party	400,000
Quintana Minerals [Member]
Related Party Transaction [Line Items]
Amount payable to Related Parties	300,000
Western Pocahontas Properties [Member]
Related Party Transaction [Line Items]
Amount payable to Related Parties	300,000
Taggart Global USA, LLC [Member]
Related Party Transaction [Line Items]
Accounts receivable from related party	700,000
Partnership sold preparation plant	12,300,000
Partnership received	10,500,000
Note receivable balance	1,800,000
Gain recorded on partnership	$ 4,700,000

XML

Long-Term Debt - Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Total debt	$ 939,269	$ 867,069
Less - current portion of long term debt	87,230	30,801
Long-term debt	852,039	836,268
$300 million floating rate revolving credit facility, due August 2016 [Member]
Debt Instrument [Line Items]
Total debt	103,000
5.55% senior notes, with semi-annual interest payments in June and December, maturing June 2013 [Member]
Debt Instrument [Line Items]
Total debt	35,000	35,000
4.91% senior notes, with semi-annual interest payments in June and December, with annual principal payments in June, maturing in June 2018 [Member]
Debt Instrument [Line Items]
Total debt	27,700	32,317
8.38% senior notes, with semi-annual interest payments in March and September, with scheduled principal payments beginning March 2013, maturing in March 2019 [Member]
Debt Instrument [Line Items]
Total debt	150,000	150,000
5.05% senior notes, with semi-annual interest payments in January and July, with annual principal payments in July, maturing in July 2020 [Member]
Debt Instrument [Line Items]
Total debt	61,538	69,230
5.31% utility local improvement obligation, with annual principal and interest payments, maturing in March 2021 [Member]
Debt Instrument [Line Items]
Total debt	1,731	1,922
5.55% senior notes, with semi-annual interest payments in June and December, with annual principal payments in June, maturing in June 2023 [Member]
Debt Instrument [Line Items]
Total debt	30,300	33,600
4.73% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2023 [Member]
Debt Instrument [Line Items]
Total debt	75,000	75,000
5.82% senior notes, with semi-annual interest payments in March and September, with annual principal payments in March, maturing in March 2024 [Member]
Debt Instrument [Line Items]
Total debt	180,000	195,000
8.92% senior notes, with semi-annual interest payments in March and September, with scheduled principal payments beginning March 2014, maturing in March 2024 [Member]
Debt Instrument [Line Items]
Total debt	50,000	50,000
5.03% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2026 [Member]
Debt Instrument [Line Items]
Total debt	175,000	175,000
5.18% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2026 [Member]
Debt Instrument [Line Items]
Total debt	$ 50,000	$ 50,000

XML

Incentive Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Unit Based Compensation Arrangement [Line Items]
Market value of common units under the incentive plan			Average closing price over the last 20 trading days prior to the vesting date
Vesting period of Grants in years			4 years
Partnership's historical distribution rate	6.95%		6.95%
Partnership's historical forfeiture rate	3.80%		3.80%
Expenses related to Incentive Plan to be reimbursed to general partner	$ 1.2	$ 0.6	$ 3.6	$ 6.1
Payments made in connection with Long-Term Incentive Plan			6.6	5.7
Unaccrued cost associated with outstanding grants and related DERs	$ 10.8		$ 10.8
Minimum [Member]
Unit Based Compensation Arrangement [Line Items]
Risk free interest rate	0.18%		0.18%
Volatility rate	30.79%		30.79%
Maximum [Member]
Unit Based Compensation Arrangement [Line Items]
Risk free interest rate	0.31%		0.31%
Volatility rate	34.63%		34.63%

XML

Significant Acquisitions

9 Months Ended

Sep. 30, 2012

Significant Acquisitions

3.    Significant Acquisitions

Colt. In September 2009, the Partnership signed a definitive agreement to acquire approximately 200 million tons of coal reserves related to the Deer Run Mine in Illinois from Colt, LLC, an affiliate of the Cline Group, through several separate transactions for a total purchase price of $255 million. During the three and nine month periods ended September 30, 2012, the Partnership paid $40.0 million and $80.0 million, respectively, to complete the acquisition of reserves at this mine.

Oklahoma Oil and Gas. From December 2011 through June 2012, the Partnership acquired approximately 19,200 net mineral acres located in the Mississippian Lime oil play in Northern Oklahoma for approximately $63.9 million, of which 15,600 net mineral acres were acquired during the first nine months of 2012 for $51.3 million.

Sugar Camp. In March 2012, the Partnership acquired from Sugar Camp Energy, an affiliate of the Cline Group, the rail loadout and associated infrastructure assets at the Sugar Camp mine in Illinois for total consideration of $50.0 million. At the time of the acquisition, the Partnership also entered into a lease agreement related to the rail loadout and associated facilities that has been accounted for as a direct financing lease. The lease provides for payments based upon tons of coal transported over the facilities subject to quarterly recoupable minimum payments of $1.25 million. The lease is for a term of 20 years but may be extended by the lessee. Total projected remaining payments under the lease at September 30, 2012 are $97.1 million with unearned income of $47.6 million. The unearned income will be reflected as transportation fees over the term of the lease using the effective interest method. Any amounts in excess of the contractual minimums will be recorded as transportation fees as earned. The net amount receivable under the lease as of September 30, 2012 was $50.0 million, of which $1.7 million is included in accounts receivable – affiliates while the remaining is included in long-term contracts receivable - affiliate. The Partnership recognized $2.6 million in transportation fees during the nine months ended September 30, 2012 related to this lease.

In a separate transaction, the Partnership acquired, from Ruger, LLC, an affiliate of the Cline Group, a contractual overriding royalty interest for $8.9 million that will provide for payments based upon production from specific tons at the Sugar Camp operations. This overriding royalty was accounted for as a financing arrangement and is reflected as an affiliate receivable. The payments the Partnership receives with respect to the overriding royalty will be reflected partially as a return of the initial investment and partially as override revenue over the life of the contract using the effective interest method based upon actual production and adjusted periodically for differences in projected and actual production. The net amount receivable under the agreement as of September 30, 2012 was $7.3 million of which $1.1 million is included in accounts receivable – affiliates while the remaining is included in long-term contracts receivable - affiliate. The Partnership recognized $0.8 million in overriding royalty during the nine months ended September 30, 2012 related to the contractual overriding royalty interest.

XML

Related Party Transactions - Summary of Reimbursements (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Related Party Transaction [Line Items]
Reimbursement for services	$ 2,303	$ 2,050	$ 7,230	$ 6,203

XML

Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2012

Summary of Activity in Outstanding Grants

A summary of activity in the outstanding grants during 2012 is as follows:

Outstanding grants at January 1, 2012	870,760
Grants during the year	272,150
Grants vested and paid during the year	(189,736	)
Forfeitures during the year	(27,196	)
Outstanding grants at September 30, 2012	925,978

XML

Major Lessees (Tables)

9 Months Ended

Sep. 30, 2012

Revenues From Lessees That Exceeded Ten Percent of Total Revenues

Revenues from lessees that exceeded ten percent of total revenues for the periods are presented below:

	Three Months Ended September 30,										Nine Months Ended September 30,
	2012						2011				2012					2011
	(Dollars in thousands) (Unaudited)										(Dollars in thousands) (Unaudited)
						(Restated)										(Restated)
	Revenues		Percent			Revenues		Percent			Revenues		Percent			Revenues		Percent
Alpha Natural Resources	$	19,731		21	%	$27,718			27	%	$	64,118		23	%	$	82,010		29	%
The Cline Group	$	19,692		21	%	$21,144			20	%	$	62,782		23	%	$	49,734		17	%

XML

Related Party Transactions - Summary of Revenues from Related Party (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Related Party Transaction [Line Items]
Coal royalty revenues	$ 70,259	$ 74,976	$ 193,053	$ 211,583
Minimums recognized as revenue	1,096	2,429	13,748	5,456
Override revenue	3,359	4,131	11,998	10,666
Other revenue	6,322	2,764	13,452	9,272
Total revenues	94,175	103,164	276,711	284,548
Taggart Global USA, LLC [Member]
Related Party Transaction [Line Items]
Processing fees	664	2,962	4,321	7,587
Kopper-Glo [Member]
Related Party Transaction [Line Items]
Coal royalty revenues	996	440	2,594	1,192
Cline Affiliates Member
Related Party Transaction [Line Items]
Coal royalty revenues	12,894	14,790	34,351	30,673
Processing fees	715	885	1,745	2,078
Transportation fees	5,008	4,765	14,362	12,609
Minimums recognized as revenue			9,556
Override revenue	1,075	704	2,768	1,384
Other revenue				2,990
Total revenues	$ 19,692	$ 21,144	$ 62,782	$ 49,734

XML

Basis of Presentation and Organization - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2012 Coal_Reserves
Number of coal reserves	3

XML

Significant Acquisitions - Additional Information (Detail) (USD $)	9 Months Ended	6 Months Ended	9 Months Ended		9 Months Ended
	Sep. 30, 2012 acre	Jun. 30, 2012 Northern Oklahoma [Member] acre	Sep. 30, 2012 Sugar Camp [Member]	Mar. 31, 2012 Sugar Camp [Member]	Sep. 30, 2012 Ruger Llc [Member]	Sep. 30, 2012 Colt [Member]	Sep. 30, 2009 Colt [Member] T
Business Acquisition [Line Items]
Coal reserve agreed to acquire under partnership agreement							200,000,000
Purchase price				$ 50,000,000			$ 255,000,000
Amount paid at closing	80,000,000					40,000,000
Land acquired	15,600	19,200
Cost of partnership acquisition	51,300,000	63,900,000
Quarterly minimum payments	1,250,000
Total projected payments	97,100,000
Unearned income	47,600,000
Net amount receivable under the lease			50,000,000		7,300,000
Net amount receivable under the lease included in accounts receivable - affiliates			1,700,000
Transportation cost of equipment			2,600,000
Contractual overriding royalty interest				8,900,000
Amount expected to be received over the next twelve months					1,100,000
Contractual overriding royalty interest					$ 800,000

XML

Recent Accounting Pronouncements

9 Months Ended

Sep. 30, 2012

Recent Accounting Pronouncements

2.    Recent Accounting Pronouncements

In June 2011, the FASB amended the presentation of comprehensive income. The amendments in this update gave the Partnership the option to present the total comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendments in this update also require the Partnership to present changes in accumulated other comprehensive income by component in the statement of unitholders’ equity or in the notes to the financial statements. These amendments are effective for fiscal years and interim periods within those years, beginning on or after December 15, 2011. The Partnership adopted this amendment on January 1, 2012 and elected to present other comprehensive income in a single continuous statement, Consolidated Statements of Comprehensive Income. The Partnership also elected to present changes in accumulated other comprehensive income in the Consolidated Statements of Partners’ Capital.

In May 2011, the FASB amended fair value measurement and disclosure requirements. The amendments result in common fair value measurement and disclosure requirements in U.S. GAAP and International Financial Reporting Standards (IFRSs). Some of the amendments clarify the FASB’s intent about the application of existing fair value measurement requirements. Other amendments change a particular principal or requirement for measuring fair value or for disclosing information about fair value measurements. These amendments are effective for fiscal years and interim periods within those years, beginning on or after December 15, 2011. The Partnership adopted this amendment on January 1, 2012. The amendment did not have a material impact on its financial position, results of operations, cash flows or notes to the financial statements.

Other accounting standards that have been issued by the FASB or other standards-setting bodies are not expected to have a material impact on the Partnership’s financial position, results of operations and cash flows.

XML

Plant and Equipment - Plant and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Plant construction in process			$ 78
Plant and equipment at cost	55,271		67,175
Less accumulated depreciation	(21,303)		(21,068)
Net book value	33,968		46,185
Total depreciation expense on plant and equipment	$ 5,259	$ 6,681

XML

Long-Term Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 Ratio	Dec. 31, 2011
Debt Instrument [Line Items]
Ratio of consolidated indebtedness	No more than 4.0 to 1.0
Percentage of consolidated net tangible assets debt of subsidiaries not permitted to exceed	10.00%
Ratio of EBITDDA to consolidated fixed charges	Not less than 3.5 to 1.0
Partnerships leverage ratio	3.75 to 1.00
Additional interest accrue	2.00%
Partnership leverage ratio	3.75
Revolving Credit Facility Outstanding Balance	$ 103	$ 0
Weighted average interest rate	2.13%	1.83%
Maximum increase in aggregate commitment	500
Minimum interest coverage ratio	3.5
Credit Facility [Member]
Debt Instrument [Line Items]
Ratio of consolidated indebtedness	3.75 to 1.00
Senior Notes [Member]
Debt Instrument [Line Items]
Principal payments on its senior notes	$ 30.8
$300 million floating rate revolving credit facility, due August 2016 [Member]
Debt Instrument [Line Items]
Commitment fee on the undrawn portion of the revolving credit facility rates	0.18% to 0.40
Minimum [Member]
Debt Instrument [Line Items]
Revolving credit facility	0.18%
Maximum [Member]
Debt Instrument [Line Items]
Revolving credit facility	0.40%

XML

CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 122,419	$ 214,922
Accounts receivable, net of allowance for doubtful accounts	36,761	30,923
Accounts receivable - affiliates	10,077	10,138
Other	218	832
Total current assets	169,475	256,815
Land	24,515	24,534
Plant and equipment, net	33,968	46,185
Coal and other mineral rights, net	1,352,800	1,257,501
Intangible assets, net	71,900	75,164
Loan financing costs, net	4,430	4,846
Long-term contracts receivable - affiliate	55,741
Other assets, net	849	604
Total assets	1,713,678	1,665,649
Current liabilities:
Accounts payable and accrued liabilities	3,223	2,366
Accounts payable - affiliates	573	375
Obligation related to acquisitions		500
Current portion of long-term debt	87,230	30,801
Accrued incentive plan expenses - current portion	7,585	8,374
Property, franchise and other taxes payable	5,602	6,316
Accrued interest	7,990	10,761
Total current liabilities	112,203	59,493
Deferred revenue	123,689	113,303
Accrued incentive plan expenses	8,915	11,670
Long-term debt	852,039	836,268
Partners' capital:
Common units outstanding (106,027,836)	604,430	629,253
General partner's interest	10,013	10,517
Non-controlling interest	2,845	5,638
Accumulated other comprehensive loss	(456)	(493)
Total partners' capital	616,832	644,915
Total liabilities and partners' capital	$ 1,713,678	$ 1,665,649

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Major Lessees - Revenues From Lessees that Exceeded Ten Percent of Total Revenues (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Alpha Natural Resources [Member]
Operating Leases, Income Statement, Lease Revenue [Line Items]
Revenues	$ 19,731	$ 27,718	$ 64,118	$ 82,010
Percent	21.00%	27.00%	23.00%	29.00%
The Cline Group [Member]
Operating Leases, Income Statement, Lease Revenue [Line Items]
Revenues	$ 19,692	$ 21,144	$ 62,782	$ 49,734
Percent	21.00%	20.00%	23.00%	17.00%

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CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL (USD $) In Thousands, except Share data	Total	General Partner [Member]	Common Stock [Member]	Non-controlling Interest [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2011	$ 644,915	$ 10,517	$ 629,253	$ 5,638	$ (493)
Balance, Shares at Dec. 31, 2011			106,027,836
Cost associated with equity transactions	(59)		(59)
Distributions	(181,309)	(3,569)	(174,947)	(2,793)
Net income	153,248	3,065	150,183
Loss on interest hedge	37				37
Comprehensive income	153,285				37
Balance at Sep. 30, 2012	$ 616,832	$ 10,013	$ 604,430	$ 2,845	$ (456)
Balance, Shares at Sep. 30, 2012			106,027,836

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Intangible Assets - Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Contract intangibles	$ 89,420		$ 89,420
Less accumulated amortization	(17,520)		(14,256)
Net book value	71,900		75,164
Total amortization expense on intangible assets	$ 3,264	$ 8,248

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Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2012

Plant and Equipment

The Partnership’s plant and equipment consist of the following:

	September 30, 2012			December 31, 2011
	(In thousands)
	(Unaudited)
Plant construction in process	$	—		$	78
Plant and equipment at cost		55,271			67,175
Less accumulated depreciation		(21,303	)		(21,068	)
Net book value	$	33,968		$	46,185
	Nine months ended September 30,
	2012			2011
	(In thousands)
	(Unaudited)
Total depreciation expense on plant and equipment	$	5,259		$	6,681

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Intangible Assets - Estimated Amortization Expense (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Remainder of 2012	$ 503
For year ended December 31, 2013	4,664
For year ended December 31, 2014	4,500
For year ended December 31, 2015	4,500
For year ended December 31, 2016	$ 4,500

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Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2012

Intangible Assets

Amounts recorded as intangible assets along with the balances and accumulated amortization are reflected in the table below:

	September 30, 2012			December 31, 2011
	(In thousands)
	(Unaudited)
Contract intangibles	$	89,420		$	89,420
Less accumulated amortization		(17,520	)		(14,256	)
Net book value	$	71,900		$	75,164

	Nine months ended September 30,
	2012		2011
	(In thousands) (Unaudited)
Total amortization expense on intangible assets	$	3,264	$	8,248

Estimated Amortization Expense

The estimates of future amortization expense relating to intangible assets for the periods indicated below are based on current mining plans, which are subject to revision in future periods.

	Estimated Amortization Expense
	(In thousands)
	(Unaudited)
Remainder of 2012	$	503
For year ended December 31, 2013		4,664
For year ended December 31, 2014		4,500
For year ended December 31, 2015		4,500
For year ended December 31, 2016		4,500

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Basis of Presentation and Organization

9 Months Ended

Sep. 30, 2012

Basis of Presentation and Organization

1.    Basis of Presentation and Organization

The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2012 are not necessarily indicative of the results that may be expected for future periods.

You should refer to the information contained in the footnotes included in Natural Resource Partners L.P.’s 2011 Annual Report on Form 10-K in connection with the reading of these unaudited interim consolidated financial statements. The Partnership restated certain income-related items with respect to 2011 to properly reflect them in the correct quarter. Please read Note 17. “Supplemental Financial Information (unaudited)” in the Partnership’s Form 10-K for the year ended December 31, 2011 for additional information related to the restatements of its prior year interim financial data.

The Partnership engages principally in the business of owning, managing and leasing mineral properties in the United States. The Partnership owns coal reserves in the three major coal-producing regions of the United States: Appalachia, the Illinois Basin and the Western United States, as well as lignite reserves in the Gulf Coast region. The Partnership also owns aggregate reserves in several states across the country. The Partnership does not operate any mines on its properties, but leases reserves to experienced operators under long-term leases that grant the operators the right to mine the Partnership’s reserves in exchange for royalty payments. Lessees are generally required to make payments based on the higher of a percentage of the gross sales price or a fixed royalty per ton, in addition to a minimum payment.

In addition, the Partnership owns transportation and preparation equipment, other mineral related rights and oil and gas properties on which it earns revenue.

The general partner of the Partnership is NRP (GP) LP, a Delaware limited partnership, whose general partner is GP Natural Resource Partners LLC, a Delaware limited liability company.

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CONSOLIDATED BALANCE SHEETS (Parenthetical)	Sep. 30, 2012	Dec. 31, 2011
Common units, outstanding	106,027,836	106,027,836

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Major Lessees

9 Months Ended

Sep. 30, 2012

Major Lessees

11.    Major Lessees

Revenues from lessees that exceeded ten percent of total revenues for the periods are presented below:

	Three Months Ended September 30,										Nine Months Ended September 30,
	2012						2011				2012					2011
	(Dollars in thousands) (Unaudited)										(Dollars in thousands) (Unaudited)
						(Restated)										(Restated)
	Revenues		Percent			Revenues		Percent			Revenues		Percent			Revenues		Percent
Alpha Natural Resources	$	19,731		21	%	$27,718			27	%	$	64,118		23	%	$	82,010		29	%
The Cline Group	$	19,692		21	%	$21,144			20	%	$	62,782		23	%	$	49,734		17	%

In the first nine months of 2012, the Partnership derived over 46% of its total revenue from the two companies listed above. As a result, the Partnership has a significant concentration of revenues with those lessees, although in most cases, with the exception of the Williamson mine operated by an affiliate of the Cline group, the exposure is spread out over a number of different mining operations and leases. Cline’s Williamson mine alone was responsible for approximately 13% of the Partnership’s total revenues for the first nine months of 2012.

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Document and Entity Information	9 Months Ended
	Sep. 30, 2012	Nov. 07, 2012
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Trading Symbol	NRP
Entity Registrant Name	NATURAL RESOURCE PARTNERS LP
Entity Central Index Key	0001171486
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		106,027,836

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Incentive Plans

9 Months Ended

Sep. 30, 2012

Incentive Plans

12.    Incentive Plans

GP Natural Resource Partners LLC adopted the Natural Resource Partners Long-Term Incentive Plan (the “Long-Term Incentive Plan”) for directors of GP Natural Resource Partners LLC and employees of its affiliates who perform services for the Partnership. The Compensation, Nominating and Governance (“CNG”) Committee of GP Natural Resource Partners LLC’s board of directors administers the Long-Term Incentive Plan. Subject to the rules of the exchange upon which the common units are listed at the time, the board of directors and the CNG Committee of the board of directors have the right to alter or amend the Long-Term Incentive Plan or any part of the Long-Term Incentive Plan from time to time. Except upon the occurrence of unusual or nonrecurring events, no change in any outstanding grant may be made that would materially reduce the benefit intended to be made available to a participant without the consent of the participant.

Under the plan a grantee will receive the market value of a common unit in cash upon vesting. Market value is defined as the average closing price over the last 20 trading days prior to the vesting date. The CNG Committee may make grants under the Long-Term Incentive Plan to employees and directors containing such terms as it determines, including the vesting period. Outstanding grants vest upon a change in control of the Partnership, the general partner, or GP Natural Resource Partners LLC. If a grantee’s employment or membership on the board of directors terminates for any reason, outstanding grants will be automatically forfeited unless and to the extent the CNG Committee provides otherwise.

A summary of activity in the outstanding grants during 2012 is as follows:

Outstanding grants at January 1, 2012	870,760
Grants during the year	272,150
Grants vested and paid during the year	(189,736	)
Forfeitures during the year	(27,196	)
Outstanding grants at September 30, 2012	925,978

Grants typically vest at the end of a four-year period and are paid in cash upon vesting. The liability fluctuates with the market value of the Partnership units and because of changes in estimated fair value determined each quarter using the Black-Scholes option valuation model. Risk free interest rates and volatility are reset at each calculation based on current rates corresponding to the remaining vesting term for each outstanding grant and ranged from 0.18% to 0.31% and 30.79% to 34.63%, respectively at September 30, 2012. The Partnership’s average distribution rate of 6.95% and historical forfeiture rate of 3.80% were used in the calculation at September 30, 2012. The Partnership recorded expenses related to its plan to be reimbursed to its general partner of $1.2 million and $0.6 million and $3.6 million and $6.1 million for the three and nine month periods ended September 30, 2012 and 2011, respectively. In connection with the Long-Term Incentive Plan, payments are typically made during the first quarter of the year. Payments of $6.6 million and $5.7 million were made during the nine month periods ended September 30, 2012 and 2011, respectively.

In connection with the phantom unit awards granted since February 2008, the CNG Committee also granted tandem Distribution Equivalent Rights, or DERs, which entitle the holders to receive distributions equal to the distributions paid on the Partnership’s common units. The DERs are payable in cash upon vesting but may be subject to forfeiture if the grantee ceases employment prior to vesting.

The unaccrued cost, associated with the unvested outstanding grants and related DERs at September 30, 2012, was $10.8 million.

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Coal royalties	$ 70,259	$ 74,976	$ 193,053	$ 211,583
Aggregate royalties	1,643	2,099	5,061	5,124
Processing fees	1,641	3,967	6,905	10,229
Transportation fees	5,007	4,765	14,361	12,608
Oil and gas royalties	1,246	5,059	6,712	10,047
Property taxes	3,602	2,974	11,421	9,563
Minimums recognized as revenue	1,096	2,429	13,748	5,456
Override royalties	3,359	4,131	11,998	10,666
Other	6,322	2,764	13,452	9,272
Total revenues	94,175	103,164	276,711	284,548
Operating costs and expenses:
Depreciation, depletion and amortization	14,485	19,819	42,066	51,576
Asset impairment		90,932		90,932
General and administrative	8,225	5,521	24,204	22,156
Property, franchise and other taxes	4,853	3,915	13,640	10,918
Transportation costs	446	540	1,446	1,531
Coal royalty and override payments	523	233	1,396	700
Total operating costs and expenses	28,532	120,960	82,752	177,813
Income (loss) from operations	65,643	(17,796)	193,959	106,735
Other income (expense):
Interest expense	(13,677)	(12,779)	(40,815)	(35,795)
Interest income	35	16	104	40
Income (loss) before non-controlling interest	52,001	(30,559)	153,248	70,980
Less non-controlling interest				51
Net income (loss)	52,001	(30,559)	153,248	70,929
Net income (loss) attributable to:
General partner	1,040	(611)	3,065	1,419
Limited partners	50,961	(29,948)	150,183	69,510
Basic and diluted net income (loss) per limited partner unit	$ 0.48	$ (0.28)	$ 1.42	$ 0.66
Weighted average number of units outstanding	106,028	106,028	106,028	106,028
Comprehensive income (loss)	$ 52,015	$ (30,545)	$ 153,285	$ 70,968

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Intangible Assets

9 Months Ended

Sep. 30, 2012

Intangible Assets

6.    Intangible Assets

Amounts recorded as intangible assets along with the balances and accumulated amortization are reflected in the table below:

	September 30, 2012			December 31, 2011
	(In thousands)
	(Unaudited)
Contract intangibles	$	89,420		$	89,420
Less accumulated amortization		(17,520	)		(14,256	)
Net book value	$	71,900		$	75,164

	Nine months ended September 30,
	2012		2011
	(In thousands) (Unaudited)
Total amortization expense on intangible assets	$	3,264	$	8,248

The estimates of future amortization expense relating to intangible assets for the periods indicated below are based on current mining plans, which are subject to revision in future periods.

	Estimated Amortization Expense
	(In thousands)
	(Unaudited)
Remainder of 2012	$	503
For year ended December 31, 2013		4,664
For year ended December 31, 2014		4,500
For year ended December 31, 2015		4,500
For year ended December 31, 2016		4,500

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Coal and Other Mineral Rights

9 Months Ended

Sep. 30, 2012

Coal and Other Mineral Rights

5.    Coal and Other Mineral Rights

The Partnership’s coal and other mineral rights consist of the following:

	September 30, 2012			December 31, 2011
	(In thousands)
	(Unaudited)
Coal and other mineral rights	$	1,774,297		$	1,645,451
Less accumulated depletion and amortization		(421,497	)		(387,950	)
Net book value	$	1,352,800		$	1,257,501

	Nine months ended September 30,
	2012		2011
	(In thousands)
	(Unaudited)
			(Restated)
Total depletion and amortization expense on coal and other mineral rights	$	33,547	$	36,646

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Coal and Other Mineral Rights (Tables)

9 Months Ended

Sep. 30, 2012

Coal and Other Mineral Rights

The Partnership’s coal and other mineral rights consist of the following:

	September 30, 2012			December 31, 2011
	(In thousands)
	(Unaudited)
Coal and other mineral rights	$	1,774,297		$	1,645,451
Less accumulated depletion and amortization		(421,497	)		(387,950	)
Net book value	$	1,352,800		$	1,257,501

	Nine months ended September 30,
	2012		2011
	(In thousands)
	(Unaudited)
			(Restated)
Total depletion and amortization expense on coal and other mineral rights	$	33,547	$	36,646

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Distributions

9 Months Ended

Sep. 30, 2012

Distributions

13.    Distributions

On August 14, 2012, the Partnership paid a quarterly distribution $0.55 per unit to all holders of common units on August 3, 2012.

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Related Party Transactions

9 Months Ended

Sep. 30, 2012

Related Party Transactions

9.    Related Party Transactions

Reimbursements to Affiliates of our General Partner

The Partnership’s general partner does not receive any management fee or other compensation for its management of Natural Resource Partners L.P. However, in accordance with the partnership agreement, the general partner and its affiliates are reimbursed for expenses incurred on the Partnership’s behalf. All direct general and administrative expenses are charged to the Partnership as incurred. The Partnership also reimburses indirect general and administrative costs, including certain legal, accounting, treasury, information technology, insurance, administration of employee benefits and other corporate services incurred by our general partner and its affiliates. The Partnership had an amount payable to Quintana Minerals Corporation of $0.3 million at September 30, 2012 for services provided by Quintana to the Partnership and a payable of $0.3 million to Western Pocahontas Properties for an overriding royalty interest on one of the Partnership’s leases.

The reimbursements to affiliates of the Partnership’s general partner for services performed by Western Pocahontas Properties and Quintana Minerals Corporation are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)
Reimbursement for services	$	2,303	$	2,050	$	7,230	$	6,203

The Partnership also leases an office building in Huntington, West Virginia from Western Pocahontas Properties and pays $0.6 million in lease payments each year through December 31, 2018.

Cline Affiliates

Various companies controlled by Chris Cline lease coal reserves from the Partnership, and the Partnership provides coal transportation services to them for a fee. At September 30, 2012, Mr. Cline, both individually and through another affiliate, Adena Minerals, LLC, owns a 31% interest in the Partnership’s general partner, as well as 12,617,673 common units. Revenues from the Cline affiliates are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)
			(Restated)				(Restated)
Coal royalty revenues	$	12,894	$	14,790	$	34,351	$	30,673
Processing fees		715		885		1,745		2,078
Transportation fees		5,008		4,765		14,362		12,609
Minimums recognized as revenue		—		—		9,556		—
Override revenue		1,075		704		2,768		1,384
Other revenue		—		—		—		2,990
	$	19,692	$	21,144	$	62,782	$	49,734

At September 30, 2012, the Partnership had amounts due from Cline affiliates totaling $62.9 million, of which $57.3 million was attributable to agreements relating to the recent Sugar Camp acquisition. See Note 3. “Significant Acquisitions” for further disclosure relating to the Sugar Camp agreements. The Partnership had received $57.7 million in minimum royalty payments that have not been recouped by Cline affiliates, of which $20.8 million was received in the current year. The $9.6 million in minimums recognized as revenue during the first nine months of 2012 was attributable to an agreement in 2012 by Gatling Ohio, LLC to relinquish its recoupment rights.

During 2011, the Partnership recognized a $3.0 million gain on a reserve exchange of over one million tons in Illinois with Williamson Energy, a Cline affiliate. The fair value of the reserves was estimated using Level 3 cash flow approach. The expected cash flows were developed using estimated annual sales tons, forecasted sales prices and anticipated market royalty rates. The tons received will be fully mined during 2012, while the tons exchanged are not included in the current mine plans. The gain is included in Other revenues on the Consolidated Statements of Comprehensive Income.

Quintana Capital Group GP, Ltd.

Corbin J. Robertson, Jr. is a principal in Quintana Capital Group GP, Ltd., which controls several private equity funds focused on investments in the energy business. In connection with the formation of Quintana Capital, the Partnership adopted a formal conflicts policy that establishes the opportunities that will be pursued by the Partnership and those that will be pursued by Quintana Capital. The governance documents of Quintana Capital’s affiliated investment funds reflect the guidelines set forth in NRP’s conflicts policy.

A fund controlled by Quintana Capital owns a significant membership interest in Taggart Global USA, LLC, including the right to nominate two members of Taggart’s 5-person board of directors. The Partnership owns and leases preparation plants to Taggart Global, which designs, builds and operates the plants. The lease payments are based on the sales price for the coal that is processed through the facilities. During the third quarter, the Partnership sold a preparation plant to Taggart for $12.3 million. The Partnership received $10.5 million in cash and a note receivable from Taggart, payable over three years for the balance. As a result of the sale, the Partnership recorded a gain of $4.7 million included in Other revenue in the Statements of Comprehensive Income. The note receivable balance at September 30, 2012 was $1.8 million.

The Partnership currently leases three facilities to Taggart. Revenues from Taggart are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)				(In thousands) (Unaudited)
Processing fees	$	664	$	2,962	$	4,321	$	7,587

At September 30, 2012, the Partnership had accounts receivable of $0.7 million from Taggart.

A fund controlled by Quintana Capital owns Kopper-Glo, a small coal mining company that is one of the Partnership’s lessees with operations in Tennessee. Revenues from Kopper-Glo are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)				(In thousands) (Unaudited)
Coal royalty revenues	$	996	$	440	$	2,594	$	1,192

The Partnership also had accounts receivable totaling $0.4 million from Kopper-Glo at September 30, 2012.

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Long-Term Debt

9 Months Ended

Sep. 30, 2012

Long-Term Debt

7.    Long-Term Debt

Long-term debt consists of the following:

	September 30, 2012			December 31, 2011
	(In thousands)
$300 million floating rate revolving credit facility, due August 2016	$	103,000		$	—
5.55% senior notes, with semi-annual interest payments in June and December, maturing June 2013		35,000			35,000
4.91% senior notes, with semi-annual interest payments in June and December, with annual principal payments in June, maturing in June 2018		27,700			32,317
8.38% senior notes, with semi-annual interest payments in March and September, with scheduled principal payments beginning March 2013, maturing in March 2019		150,000			150,000
5.05% senior notes, with semi-annual interest payments in January and July, with annual principal payments in July, maturing in July 2020		61,538			69,230
5.31% utility local improvement obligation, with annual principal and interest payments, maturing in March 2021		1,731			1,922
5.55% senior notes, with semi-annual interest payments in June and December, with annual principal payments in June, maturing in June 2023		30,300			33,600
4.73% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2023		75,000			75,000
5.82% senior notes, with semi-annual interest payments in March and September, with annual principal payments in March, maturing in March 2024		180,000			195,000
8.92% senior notes, with semi-annual interest payments in March and September, with scheduled principal payments beginning March 2014, maturing in March 2024		50,000			50,000
5.03% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2026		175,000			175,000
5.18% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2026		50,000			50,000
Total debt		939,269			867,069
Less – current portion of long term debt		(87,230	)		(30,801	)
Long-term debt	$	852,039		$	836,268

Principal payments due in:

	Senior Notes		Credit Facility		Total
	(In thousands)
Remainder of 2012	$	—	$	—	$	—
2013		87,230		—		87,230
2014		80,983		—		80,983
2015		80,983		—		80,983
2016		80,983		103,000		183,983
Thereafter		506,090		—		506,090
	$	836,269	$	103,000	$	939,269

The senior note purchase agreement contains covenants requiring our operating subsidiary to:

• Maintain a ratio of consolidated indebtedness to consolidated EBITDDA (as defined in the note purchase agreement) of no more than 4.0 to 1.0 for the four most recent quarters;

• not permit debt secured by certain liens and debt of subsidiaries to exceed 10% of consolidated net tangible assets (as defined in the note purchase agreement); and

• maintain the ratio of consolidated EBITDDA to consolidated fixed charges (consisting of consolidated interest expense and consolidated operating lease expense) at not less than 3.5 to 1.0.

The 8.38% and 8.92% senior notes also provide that in the event that the Partnership’s leverage ratio exceeds 3.75 to 1.00 at the end of any fiscal quarter, then in addition to all other interest accruing on these notes, additional interest in the amount of 2.00% per annum shall accrue on the notes for the two succeeding quarters and for as long thereafter as the leverage ratio remains above 3.75 to 1.00.

The Partnership made principal payments of $30.8 million on its senior notes during the nine months ended September 30, 2012.

At September 30, 2012, the Partnership had $103 million outstanding on its revolving credit facility; while at December 31, 2011 the Partnership did not have any outstanding balance. The weighted average interest rates for the nine months ended September 30, 2012 and year ended December 31, 2011 were 2.13% and 1.83%, respectively. The Partnership incurs a commitment fee on the undrawn portion of the revolving credit facility at rates ranging from 0.18% to 0.40% per annum. The facility includes an accordion feature whereby the Partnership may request its lenders to increase their aggregate commitment to a maximum of $500 million on the same terms.

The revolving credit facility contains covenants requiring the Partnership to maintain:

• a ratio of consolidated indebtedness to consolidated EBITDDA (as defined in the credit agreement) not to exceed 4.0 to 1.0 and,

• a ratio of consolidated EBITDDA to consolidated fixed charges (consisting of consolidated interest expense and consolidated lease operating expense) of not less than 3.5 to 1.0 for the four most recent quarters.

The Partnership was in compliance with all terms under its long-term debt as of September 30, 2012.

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Fair Value

9 Months Ended

Sep. 30, 2012

Fair Value

8.    Fair Value

The Partnership’s financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable and long-term debt. The carrying amount of the Partnership’s financial instruments included in accounts receivable and accounts payable approximates their fair value due to their short-term nature except for the accounts receivable – affiliate relating to the Sugar Camp override and Taggart preparation plant sale that includes both current and long-term portions. The Partnership’s cash and cash equivalents include money market accounts and are considered a Level 1 measurement. The fair market value and carrying value of the contractual override, Taggart note receivable and long-term senior notes are as follows:

	Fair Value As Of				Carrying Value As Of
	September 30, 2012		December 31, 2011		September 30, 2012		December 31, 2011
	(In thousands)
	(Unaudited)				(Unaudited)
Assets
Sugar Camp override, current     and long - term	$	8,724	$	—	$	7,294	$	—
Taggart plant sale, current     and long-term	$	1,808	$	—	$	1,808	$	—
Liabilities
Long-term debt, current and long-term	$	881,023	$	915,959	$	836,269	$	867,069

The fair value of the Sugar Camp override, Taggart plant sale and long-term debt is estimated by management using comparable term risk-free treasury issues with a market rate component determined by current financial instruments with similar characteristics which is a Level 3 measurement. Since the Partnership’s credit facility is variable rate debt, its fair value approximates its carrying amount.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2012

Commitments and Contingencies

10.    Commitments and Contingencies

Legal

The Partnership is involved, from time to time, in various legal proceedings arising in the ordinary course of business. While the ultimate results of these proceedings cannot be predicted with certainty, Partnership management believes these claims will not have a material effect on the Partnership’s financial position, liquidity or operations.

Environmental Compliance

The operations that the Partnership’s lessees conduct on the Partnership’s properties are subject to environmental laws and regulations adopted by various governmental authorities in the jurisdictions in which these operations are conducted. As an owner of coal reserves, as well as surface interests in some properties, the Partnership may be liable for environmental conditions occurring at the Partnership’s properties. The terms of substantially all of the Partnership’s leases require the lessee to comply with all applicable laws and regulations, including environmental laws and regulations. Lessees post reclamation bonds assuring that reclamation will be completed as required by the relevant permit, and substantially all of the leases require the lessee to indemnify the Partnership against, among other things, environmental liabilities. Some of these indemnifications survive the termination of the lease. The Partnership makes regular visits to the mines to ensure compliance with lease terms, but the duty to comply with all regulations rests with the lessees. The Partnership believes that its lessees will be able to comply with existing regulations and does not expect any lessee’s failure to comply with environmental laws and regulations to have a material impact on the Partnership’s financial condition or results of operations. The Partnership also carries pollution liability insurance, and West Virginia has established a fund to satisfy any shortfall in the Partnership’s lessees’ reclamation obligations, but this fund may not be sufficient to cover the Partnership’s costs in the event that it is determined to be responsible for environmental contamination.

The Partnership’s lessees regularly conduct reclamation work on the properties under lease to them. Because the Partnership is not the permittee of the operations on its properties, the Partnership is not responsible for the costs associated with the reclamation. However, the Partnership has received a Notice of Intent to File a Citizen Suit in connection with alleged selenium discharges from one of its properties in West Virginia. Mining has now ceased on the property, but was originally conducted by Pittston Coal Company, which assigned the lease to Massey Energy, which subsequently merged with Alpha Natural Resources. The reclamation has been completed and the permits and bonding have been released, leading the plaintiffs to name the Partnership as the party responsible for the alleged discharge since the Partnership is the current owner of the property. Several other landowners have recently received similar notices, but these are the first instances of which the Partnership is aware that have targeted landowners rather than the mining companies. As of September 30, 2012, the Partnership had not been sued in connection with the notice. Although this particular litigation, if filed, would not be material to the Partnership, to the extent that the Partnership is not successful in defending these types of claims, does not receive indemnity under its leases or the claims are not covered by the Partnership’s pollution liability insurance, or to the extent that these types of claims become more pervasive in the future, these issues could become material to NRP.

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Coal and Other Mineral Rights - Coal and Other Mineral Rights (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Coal and other mineral rights	$ 1,774,297		$ 1,645,451
Less accumulated depletion and amortization	(421,497)		(387,950)
Net book value	1,352,800		1,257,501
Total depletion and amortization expense on coal and other mineral rights	$ 33,547	$ 36,646

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Recent Accounting Pronouncements (Policies)

9 Months Ended

Sep. 30, 2012

Comprehensive Income

In June 2011, the FASB amended the presentation of comprehensive income. The amendments in this update gave the Partnership the option to present the total comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendments in this update also require the Partnership to present changes in accumulated other comprehensive income by component in the statement of unitholders’ equity or in the notes to the financial statements. These amendments are effective for fiscal years and interim periods within those years, beginning on or after December 15, 2011. The Partnership adopted this amendment on January 1, 2012 and elected to present other comprehensive income in a single continuous statement, Consolidated Statements of Comprehensive Income. The Partnership also elected to present changes in accumulated other comprehensive income in the Consolidated Statements of Partners’ Capital.

Fair value measurement

In May 2011, the FASB amended fair value measurement and disclosure requirements. The amendments result in common fair value measurement and disclosure requirements in U.S. GAAP and International Financial Reporting Standards (IFRSs). Some of the amendments clarify the FASB’s intent about the application of existing fair value measurement requirements. Other amendments change a particular principal or requirement for measuring fair value or for disclosing information about fair value measurements. These amendments are effective for fiscal years and interim periods within those years, beginning on or after December 15, 2011. The Partnership adopted this amendment on January 1, 2012. The amendment did not have a material impact on its financial position, results of operations, cash flows or notes to the financial statements.

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Fair Value (Tables)

9 Months Ended

Sep. 30, 2012

Contractual Override and Long-Term Debt

The fair market value and carrying value of the contractual override, Taggart note receivable and long-term senior notes are as follows:

	Fair Value As Of				Carrying Value As Of
	September 30, 2012		December 31, 2011		September 30, 2012		December 31, 2011
	(In thousands)
	(Unaudited)				(Unaudited)
Assets
Sugar Camp override, current     and long - term	$	8,724	$	—	$	7,294	$	—
Taggart plant sale, current     and long-term	$	1,808	$	—	$	1,808	$	—
Liabilities
Long-term debt, current and long-term	$	881,023	$	915,959	$	836,269	$	867,069

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Distributions - Additional Information (Detail)	Aug. 14, 2012
Equity [Line Items]
Quarterly distribution to holders of common units	0.55

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Fair Value - Contractual Override and Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Sugar Camp override, current and long-term	$ 8,724
Fair Value of Taggart plant sale, current and long-term	1,808
Fair Value of Long-term debt, current and long-term	881,023	915,959
Carrying Value of Sugar Camp override, current and long-term	7,294
Carrying Value of Taggart plant sale, current and long-term	1,808
Carrying Value of Long-term debt, current and long-term	$ 836,269	$ 867,069

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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income	$ 153,248	$ 70,929
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	42,066	51,576
Asset impairment		90,932
Gains on sale of assets	(8,823)	(1,058)
Gain on reserve swap		(2,990)
Non-cash interest charge, net	453	493
Non-controlling interest		51
Change in operating assets and liabilities:
Accounts receivable	666	(12,770)
Other assets	369	556
Accounts payable and accrued liabilities	1,055	213
Accrued interest	(2,771)	(1,710)
Deferred revenue	11,867	24,541
Accrued incentive plan expenses	(3,544)	(14)
Property, franchise and other taxes payable	(714)	(2,427)
Net cash provided by operating activities	193,872	218,322
Cash flows from investing activities:
Acquisition of land, coal and other mineral rights	(134,463)	(107,509)
Acquisition or construction of plant and equipment	(681)	(325)
Proceeds from sale of assets	15,047	5,500
Return on direct financing lease and contractual override	2,399
Acquisition of contracts	(59,009)
Net cash used in investing activities	(176,707)	(102,334)
Cash flows from financing activities:
Proceeds from loans	103,000	335,000
Repayment of loans	(30,800)	(210,519)
Deferred financing costs		(2,774)
Repayment of obligation related to acquisitions	(500)	(7,625)
Costs associated with equity transactions	(59)	(141)
Distributions to partners	(181,309)	(175,323)
Net cash used in financing activities	(109,668)	(61,382)
Net increase (decrease) in cash and cash equivalents	(92,503)	54,606
Cash and cash equivalents at beginning of period	214,922	95,506
Cash and cash equivalents at end of period	122,419	150,112
Supplemental cash flow information:
Cash paid during the period for interest	43,113	37,074
Non-cash activities:
Obligation related to purchase of reserves and infrastructure		4,100
Non-controlling interest		373
Note receivable from sale of asset	$ 1,808

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Plant and Equipment

9 Months Ended

Sep. 30, 2012

Plant and Equipment

4.    Plant and Equipment

The Partnership’s plant and equipment consist of the following:

	September 30, 2012			December 31, 2011
	(In thousands)
	(Unaudited)
Plant construction in process	$	—		$	78
Plant and equipment at cost		55,271			67,175
Less accumulated depreciation		(21,303	)		(21,068	)
Net book value	$	33,968		$	46,185
	Nine months ended September 30,
	2012			2011
	(In thousands)
	(Unaudited)
Total depreciation expense on plant and equipment	$	5,259		$	6,681

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Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2012

Summary of Reimbursements

The reimbursements to affiliates of the Partnership’s general partner for services performed by Western Pocahontas Properties and Quintana Minerals Corporation are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)
Reimbursement for services	$	2,303	$	2,050	$	7,230	$	6,203

Cline Affiliates Member

Summary of Revenues from Related Party

The Partnership currently leases three facilities to Taggart. Revenues from Taggart are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)				(In thousands) (Unaudited)
Processing fees	$	664	$	2,962	$	4,321	$	7,587

Taggart Global USA, LLC [Member]

Summary of Revenues from Related Party

Revenues from Kopper-Glo are as follows:

	Three Months  Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)				(In thousands) (Unaudited)
Coal royalty revenues	$	996	$	440	$	2,594	$	1,192

Kopper-Glo [Member]

Summary of Revenues from Related Party

Revenues from the Cline affiliates are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(In thousands) (Unaudited)
			(Restated)				(Restated)
Coal royalty revenues	$	12,894	$	14,790	$	34,351	$	30,673
Processing fees		715		885		1,745		2,078
Transportation fees		5,008		4,765		14,362		12,609
Minimums recognized as revenue		—		—		9,556		—
Override revenue		1,075		704		2,768		1,384
Other revenue		—		—		—		2,990
	$	19,692	$	21,144	$	62,782	$	49,734

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Long-Term Debt - Long-Term Debt (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
$300 million floating rate revolving credit facility, due August 2016 [Member]
Debt Instrument [Line Items]
Floating rate revolving credit facility	300
5.55% senior notes, with semi-annual interest payments in June and December, maturing June 2013 [Member]
Debt Instrument [Line Items]
Rate of Senior Notes due	5.55%
4.91% senior notes, with semi-annual interest payments in June and December, with annual principal payments in June, maturing in June 2018 [Member]
Debt Instrument [Line Items]
Rate of Senior Notes due	4.91%
8.38% senior notes, with semi-annual interest payments in March and September, with scheduled principal payments beginning March 2013, maturing in March 2019 [Member]
Debt Instrument [Line Items]
Rate of Senior Notes due	8.38%
5.05% senior notes, with semi-annual interest payments in January and July, with annual principal payments in July, maturing in July 2020 [Member]
Debt Instrument [Line Items]
Rate of Senior Notes due	5.05%
5.31% utility local improvement obligation, with annual principal and interest payments, maturing in March 2021 [Member]
Debt Instrument [Line Items]
Rate of utility local improvement obligation	5.31%
5.55% senior notes, with semi-annual interest payments in June and December, with annual principal payments in June, maturing in June 2023 [Member]
Debt Instrument [Line Items]
Rate of Senior Notes due	5.55%
4.73% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2023 [Member]
Debt Instrument [Line Items]
Rate of Senior Notes due	4.73%
5.82% senior notes, with semi-annual interest payments in March and September, with annual principal payments in March, maturing in March 2024 [Member]
Debt Instrument [Line Items]
Rate of Senior Notes due	5.82%
8.92% senior notes, with semi-annual interest payments in March and September, with scheduled principal payments beginning March 2014, maturing in March 2024 [Member]
Debt Instrument [Line Items]
Rate of Senior Notes due	8.92%
5.03% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2026 [Member]
Debt Instrument [Line Items]
Rate of Senior Notes due	5.03%
5.18% senior notes, with semi-annual interest payments in June and December, with scheduled principal payments beginning December 2014, maturing in December 2026 [Member]
Debt Instrument [Line Items]
Rate of Senior Notes due	5.18%

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Subsequent Events

9 Months Ended

Sep. 30, 2012

Subsequent Events

14.    Subsequent Events

The following represents material events that have occurred subsequent to September 30, 2012 through the time of the Partnership’s filing with the Securities and Exchange Commission:

Distributions

On October 17, 2012, the Partnership declared a distribution of $0.55 per unit to be paid on November 14, 2012 to unitholders of record on November 5, 2012.

Acquisition

Hi-Crush Override. On October 30, 2012 the Partnership acquired an overriding royalty interest in frac sand reserves located on approximately 561 acres near Wyeville, Wisconsin for approximately $15.0 million.