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 June 30, 2011.
OR
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from __________ to __________.

Commission File Number 1-7978

Black Hills Power, Inc.

Incorporated in South Dakota  IRS Identification Number 46-0111677

625 Ninth Street, Rapid City, South Dakota 57701

Registrant's telephone number (605) 721-1700

Former name, former address, and former fiscal year if changed since last report

NONE

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 o

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the Registrant was required to submit and post such files).

Yes x No o

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company (as defined in Rule 12b-2 of the Exchange Act).

Large accelerated filer	o	Accelerated filer	o
Non-accelerated filer	x	Smaller reporting company	o

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes o No x

As of July 29, 2011, there were issued and outstanding 23,416,396 shares of the Registrant's common stock, $1.00 par value, all of which were held beneficially and of record by Black Hills Corporation.

Reduced Disclosure

The Registrant meets the conditions set forth in General Instruction H (1) (a) and (b) of Form 10-Q and is therefore filing this Form 10-Q with the reduced disclosure format.

TABLE OF CONTENTS

		Page
	GLOSSARY OF TERMS AND ABBREVIATIONS	3
PART 1.	FINANCIAL INFORMATION
Item 1.	Financial Statements
	Condensed Statements of Income - unaudited	4
	Three and Six Months Ended June 30, 2011 and 2010
	Condensed Balance Sheets - unaudited	5
	June 30, 2011 and December 31, 2010
	Cash Flow Statements - unaudited	6
	Six Months Ended June 30, 2011 and 2010
	Notes to Condensed Financial Statements - unaudited	7
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	16
Item 4.	Controls and Procedures	21
PART II.	OTHER INFORMATION	21
Item 1.	Legal Proceedings	21
Item 1A.	Risk Factors	21
Item 6.	Exhibits	21
	Signatures	23
	Exhibit Index	24

2

GLOSSARY OF TERMS AND ABBREVIATIONS

The following terms and abbreviations appear in the text of this report and have the definitions described below:

AFUDC	Allowance for Funds Used During Construction
ASC	Accounting Standards Codification
ASC 220	ASC 220, "Comprehensive Income"
ASC 820	ASC 820, "Fair Value Measurements"
ASU	Accounting Standards Update
BHC	Black Hills Corporation, the Parent Company
Black Hills Energy	The name used to conduct the business activities of Black Hills Utility Holdings, Inc., a direct, wholly-owned subsidiary of the Parent Company
Black Hills Wyoming	Black Hills Wyoming, LLC, an indirect, wholly-owned subsidiary of the Parent Company
Cheyenne Light	Cheyenne Light, Fuel and Power Company, a direct, wholly-owned subsidiary of the Parent Company
Enserco	Enserco Energy, Inc., an indirect, wholly-owned subsidiary of the Parent Company
FASB	Financial Accounting Standards Board
FERC	Federal Energy Regulatory Commission
GAAP	Generally Accepted Accounting Principles
IFRS	International Financial Reporting Standards
IRS	Internal Revenue Service
LIBOR	London Interbank Offered Rate
MMBtu	One million British thermal units
MW	Megawatts
MWh	Megawatt-hours
PPA	Purchase Power Agreement
PPACA	Patient Protection and Affordability Care Act
SDPUC	South Dakota Public Utilities Commission
SEC	U.S. Securities and Exchange Commission
WPSC	Wyoming Public Service Commission
WRDC	Wyodak Resources Development Corp., an indirect, wholly-owned subsidiary of the Parent Company

3

BLACK HILLS POWER, INC.

CONDENSED STATEMENTS OF INCOME

(unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
	(in thousands)
Operating revenue	$	56,098		$	56,438		$	115,292		$	110,927
Operating expenses:
Fuel and purchased power	22,764			21,616			44,324			45,852
Operations and maintenance	16,195			17,356			34,185			32,361
Depreciation and amortization	6,761			5,684			13,323			10,418
Taxes - property	1,197			1,272			2,362			2,425
Total operating expenses	46,917			45,928			94,194			91,056
Operating income	9,181			10,510			21,098			19,871
Other income (expense):
Interest expense	(4,533		)	(5,803		)	(8,753		)	(11,283		)
AFUDC - borrowed	88			187			268			1,801
Interest income	360			1,029			370			1,424
AFUDC - equity	155			230			442			2,237
Other income (expense), net	(256		)	18			(152		)	138
Total other income (expense)	(4,186		)	(4,339		)	(7,825		)	(5,683		)
Income before income taxes	4,995			6,171			13,273			14,188
Income tax expense	(1,254		)	(2,069		)	(3,651		)	(4,152		)
Net income	$	3,741		$	4,102		$	9,622		$	10,036

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

4

BLACK HILLS POWER, INC.

CONDENSED BALANCE SHEETS

(unaudited)

	June 30, 2011			December 31, 2010
	(in thousands, except share amounts)
ASSETS
Current assets:
Cash and cash equivalents	$	4,312		$	2,045
Receivables - customers, net	21,736			28,716
Receivables - affiliates	3,267			6,891
Other receivables, net	466			2,077
Money pool notes receivable	49,827			39,862
Materials, supplies and fuel	21,347			21,259
Regulatory assets, current	5,627			3,584
Other, current assets	3,780			3,712
Total current assets	110,362			108,146
Investments	4,534			4,396
Property, plant and equipment	1,000,649			962,640
Less accumulated depreciation and amortization	(321,903		)	(304,800		)
Total property, plant and equipment, net	678,746			657,840
Other assets:
Regulatory assets, non-current	35,765			37,740
Other, non-current assets	3,774			3,610
Total other assets	39,539			41,350
TOTAL ASSETS	$	833,181		$	811,732
LIABILITIES AND STOCKHOLDER'S EQUITY
Current liabilities:
Current maturities of long-term debt	$	78		$	81
Accounts payable	13,873			14,828
Accounts payable - affiliates	15,299			12,562
Accrued liabilities	16,406			15,541
Regulatory liabilities, current	1,193			1,932
Deferred income tax liabilities, current	573			859
Total current liabilities	47,422			45,803
Long-term debt, net of current maturities	276,388			276,422
Deferred credits and other liabilities:
Deferred income tax liability, non-current	125,507			122,319
Regulatory liabilities, non-current	34,633			28,276
Benefit plan liabilities	20,695			19,581
Other, deferred credits and other liabilities	9,476			9,914
Total deferred credits and other liabilities	190,311			180,090
Stockholder's equity:
Common stock $1 par value; 50,000,000 shares authorized; 23,416,396 shares issued	23,416			23,416
Additional paid-in capital	39,575			39,575
Retained earnings	257,310			247,688
Accumulated other comprehensive loss	(1,241		)	(1,262		)
Total stockholder's equity	319,060			309,417
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY	$	833,181		$	811,732

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

5

BLACK HILLS POWER, INC.

CONDENSED STATEMENTS OF CASH FLOWS

(unaudited)

	Six Months Ended June 30,
	2011			2010
	(in thousands)
Operating activities:
Net income	$	9,622		$	10,036
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	13,323			10,418
Deferred income tax	4,026			11,029
Employee benefits	1,202			2,043
AFUDC - equity	(442		)	(2,237		)
Other, net	514			159
Change in operating assets and liabilities -
Accounts receivable and other current assets	11,224			(1,953		)
Accounts payable and other current liabilities	866			(10,495		)
Regulatory assets	166			(441		)
Regulatory liabilities	(2,358		)	—
Other operating activities	(1,552		)	2,027
Net cash provided by operating activities	36,591			20,586
Investing activities:
Property, plant and equipment additions	(24,183		)	(40,241		)
Change in money pool notes receivable, net	(9,965		)	57,737
Other investing activities	(139		)	3,392
Net cash provided by (used in) investing activities	(34,287		)	20,888
Financing activities:
Long-term debt - repayments	(37		)	(52,532		)
Change in money pool notes payable, net	—			13,028
Other financing activities	—			(1,176		)
Net cash provided by (used in) financing activities	(37		)	(40,680		)
Net change in cash and cash equivalents	2,267			794
Cash and cash equivalents, beginning of period	2,045			1,709
Cash and cash equivalents, end of period	$	4,312		$	2,503

See Note 10 for supplemental cash flow information

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

6

BLACK HILLS POWER, INC.

Notes to Condensed Financial Statements

(unaudited)

(Reference is made to Notes to Financial Statements

included in our 2010 Annual Report on Form 10-K)

(1)     MANAGEMENT'S STATEMENT

The condensed financial statements included herein have been prepared by Black Hills Power, Inc. (the "Company," "we," "us," or "our"), without audit, pursuant to the rules and regulations of the SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such rules and regulations; however, we believe that the footnotes adequately disclose the information presented. These condensed financial statements should be read in conjunction with the financial statements and the notes thereto, included in our 2010 Annual Report on Form 10-K filed with the SEC.

Accounting methods historically employed require certain estimates as of interim dates. The information furnished in the accompanying condensed financial statements reflects all adjustments which are, in the opinion of management, necessary for a fair presentation of the June 30, 2011, December 31, 2010 and June 30, 2010 financial information and are of a normal recurring nature. The results of operations for the three and six months ended June 30, 2011 and June 30, 2010, and our financial condition as of June 30, 2011 and December 31, 2010 are not necessarily indicative of the results of operations and financial condition to be expected as of or for any other period.

Certain prior year data presented in the condensed financial statements has been reclassified to conform to the current year presentation. These reclassifications had no effect on our financial position, results of operations, or cash flows.

(2)     RECENTLY ADOPTED AND RECENTLY ISSUED ACCOUNTING STANDARDS AND LEGISLATION

Other Comprehensive Income, ASU No. 2011-05

FASB issued an accounting standards update amending ASC 220 to improve the comparability, consistency and transparency of reporting of comprehensive income. It amends existing guidance by allowing only two options for presenting the components of net income and other comprehensive income: (1) in a single continuous financial statement, statement of comprehensive income or (2) in two separate but consecutive financial statements, consisting of an income statement followed by a separate statement of other comprehensive income. Also, items that are reclassified from other comprehensive income to net income must be presented on the face of the financial statements. ASU No. 2011-05 requires retrospective application, and it is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011, with early adoption permitted. We believe the adoption of this update will change the order in which certain financial statements are presented and provide additional detail on those financial statements when applicable, but will not have any other impact on our financial statements.

Fair Value Measurement, ASU No. 2011-04

FASB issued an accounting standards update amending ASC 820 to achieve common fair value measurement and disclosure requirements between U.S. GAAP and IFRS. This amendment changes the wording used to describe fair value and requires additional disclosures. We do not expect this amendment, which is effective for interim and annual periods beginning after December 31, 2011, to have an impact on our financial position, results of operations, or cash flows.

Patient Protection and Affordable Care Act (HR 3590)

In March 2010, the President of the United States signed into law comprehensive healthcare reform legislation under the PPACA as amended by the Healthcare and Education Reconciliation Act. The potential impact on the Company, if any, cannot be determined until regulations are promulgated under the PPACA.  Included among the provisions of the PPACA is a change in the tax treatment of the Medicare Part D subsidy (the "subsidy") which affects our Non-Pension Postretirement Benefit Plan. Internal Revenue Code Section 139A has been amended to eliminate the deduction of the subsidy in reducing income for years beginning after December 31, 2012. The impact of this change in the tax treatment of the subsidy had an immaterial effect on our financial position, results of operations and cash flows. The Company will continue to assess the accounting implications of the PPACA as related regulations and interpretations become available.

7

(3)     ACCOUNTS RECEIVABLE

We maintain an allowance for doubtful accounts which reflects our best estimate of probable uncollectible trade receivables. We regularly review our trade receivable allowance by considering such factors as historical experience, credit worthiness, the age of the receivable balances and current economic conditions that may affect the ability to pay.

Accounts receivable consist of sales to residential, commercial, industrial, municipal and other customers all of which do not bear interest. These accounts receivable balances are stated at billed and unbilled amounts net of write-offs. Approximately 31% of the accounts receivable balance consists of unbilled revenue as of June 30, 2011.

The allowance for doubtful accounts represents our best estimate of existing accounts receivable that will ultimately be uncollected. The allowance is calculated by applying estimated write-off factors to various classes of outstanding receivables, including unbilled revenue. The write-off factors used to estimate uncollectible accounts are based upon consideration of both historical collections experience and management's best estimate of future collection success given the existing collections environment.

In specific cases where we are aware of a customer's inability or reluctance to pay, we record an allowance for doubtful accounts against amounts due to reduce the net receivable balance to the amount we reasonably expect to collect. However, if circumstances change, our estimate of the recoverability of accounts receivable could be affected. Circumstances which could affect our estimates include, but are not limited to, customer credit issues, the level of commodity prices, customer deposits and general economic conditions. Accounts are written off once they are deemed to be uncollectible or the time allowed for dispute under the contract has expired.

Following is a summary of accounts receivable balances (in thousands):

	June 30, 2011			December 31, 2010
Accounts receivable trade	$	15,239		$	21,365
Unbilled revenues	6,655			7,581
Total accounts receivable - customers	21,894			28,946
Allowance for doubtful accounts	(158		)	(230		)
Receivable - customers, net	$	21,736		$	28,716

8

(4)     REGULATORY ASSETS AND LIABILITIES

We had the following regulatory assets and liabilities (in thousands):

	Recovery Period	June 30, 2011		December 31, 2010
Regulatory assets:
Unamortized loss on reacquired debt	14 years	$	2,891	$	3,016
AFUDC	Up to 45 years	9,489		9,489
Defined benefit postretirement plans	Up to 13 years	18,615		18,049
Deferred energy costs	Less than one year	5,346		3,584
Flow through accounting	Up to 35 years	4,284		4,772
Other		767		2,414
Total regulatory assets		$	41,392	$	41,324
Regulatory liabilities:
Cost of removal for utility plant	Up to 53 years	$	22,851	$	15,429
Defined benefit postretirement plans	Up to 13 years	10,874		10,204
Other		2,101		4,575
Total regulatory liabilities		$	35,826	$	30,208

Regulatory assets are primarily recorded for the probable future revenue to recover the costs associated with defined benefit postretirement plans, future income taxes related to the deferred tax liability for the equity component of AFUDC of utility assets and unamortized losses on reacquired debt. To the extent that energy costs are under-recovered or over-recovered during the year, they are recorded as a regulatory asset or liability, respectively. Regulatory liabilities include the probable future decrease in rate revenues related to a decrease in deferred tax liabilities for prior reductions in statutory federal income tax rates, gains associated with regulated utilities' defined benefit postretirement plans and the cost of removal for utility plant, recovered through our electric utility rates. Regulatory assets are included in Regulatory assets, current and Regulatory assets, non-current on the accompanying Condensed Balance Sheets. Regulatory liabilities are included in Regulatory liabilities, current and Regulatory liabilities, non-current on the accompanying Condensed Balance Sheets.

9

(5)     COMPREHENSIVE INCOME

The following table presents the components of Comprehensive income (in thousands):

	Three Months Ended June 30, 2011					Six Months Ended June 30, 2011
Net income				$	3,741				$	9,622
Other comprehensive income, net of tax:
Fair value adjustment on derivatives designated as cash flow hedges	$	—				$	—
Taxes	—					—
Fair value adjustment on derivatives designated as cash flow hedges, net of tax				—					—
Reclassification adjustments included in net income	$	16				$	32
Taxes	(6		)			(11		)
Reclassification adjustments included in net income, net of tax				10					21
Comprehensive income				$	3,751				$	9,643

	Three Months Ended June 30, 2010						Six Months Ended June 30, 2010
Net income				$	4,102					$	10,036
Other comprehensive income, net of tax:
Fair value adjustment on derivatives designated as cash flow hedges	$	(10	)				$	317
Taxes	4						(111		)
Fair value adjustment on derivatives designated as cash flow hedges, net of tax				(6		)				206
Reclassification adjustments included in net income	$	16					$	33
Taxes	(6		)				(12		)
Reclassification adjustments included in net income, net of tax				10						21
Comprehensive income				$	4,106					$	10,263

Balances by classification included within Accumulated other comprehensive loss on the accompanying Condensed Balance Sheets were as follows (in thousands):

	June 30, 2011			December 31, 2010
Derivatives designated as cash flow hedges	$	(827	)	$	(848	)
Employee benefit plans	(414		)	(414		)
Total accumulated other comprehensive loss	$	(1,241	)	$	(1,262	)

10

(6)     RELATED-PARTY TRANSACTIONS

Receivables and Payables

We have accounts receivable and accounts payable balances related to transactions with other BHC subsidiaries. The balances were as follows (in thousands):

	June 30, 2011		December 31, 2010
Receivable - affiliates	$	3,267	$	6,891
Accounts payable - affiliates	$	15,299	$	12,562

Money Pool Notes Receivable and Notes Payable

We have entered into a Utility Money Pool Agreement (the "Agreement") with BHC, Cheyenne Light and Black Hills Energy. Under the Agreement, we may borrow from our Parent. The Agreement restricts us from loaning funds to our Parent or to any of our Parent's non-utility subsidiaries; the Agreement does not restrict us from making dividends to our Parent. Borrowings under the agreement bear interest at the daily cost of external funds as defined under the Agreement, or if there are no external funds outstanding on that date, then the rate will be the daily one month LIBOR rate plus 100 basis points.

We had the following balances with the Utility Money Pool (in thousands):

	June 30, 2011		December 31, 2010
Money pool notes receivable	$	49,827	$	39,862

Advances under the Utility Money Pool notes bear interest at 2.75% above the daily LIBOR rate (which equates to 2.94% at June 30, 2011). Net interest (income) expense relating to balances for the Utility Money Pool was as follows (in thousands):

	Three Months Ended June 30,					Six Months Ended June 30,
	2011			2010		2011			2010
Net interest (income) expense	$	(343	)	$	4	$	(660	)	$	(50	)

11

Other Balances and Transactions

The sales and purchases with related parties were as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Revenues:
Transmission of electricity sold to Black Hills Wyoming	$	58	$	769	$	220	$	942
Electricity and dispatch services sold to Cheyenne Light	$	63	$	326	$	248	$	874
Expenses:
Coal purchases from WRDC	$	5,758	$	3,900	$	10,645	$	7,984
Purchase of excess power generated at Cheyenne Light	$	3,660	$	2,119	$	5,467	$	4,710
Natural gas from Enserco	$	62	$	200	$	223	$	722
Corporate support services from Parent and Black Hills Energy	$	4,509	$	4,212	$	9,683	$	8,216

We have funds on deposit from Black Hills Wyoming for transmission system reserve which are included in Other, deferred credits and other liabilities on the accompanying Condensed Balance Sheets. We have transmission system reserve balances as follows (in thousands):

	June 30, 2011		December 31, 2010
Funds on deposit from affiliate	$	2,076	$	2,044

Interest on the funds on deposit from Black Hills Wyoming accrues quarterly at an average quarterly prime rate (3.25% at June 30, 2011).

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Interest expense paid to affiliate	$	16	$	16	$	33	$	32

12

(7)     EMPLOYEE BENEFIT PLANS

Defined Benefit Pension Plan

We have a noncontributory defined benefit pension plan (the "Pension Plan") covering employees who meet certain eligibility requirements.

The components of net periodic benefit cost for the Pension Plan were as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Service cost	$	199		$	304		$	398		$	608
Interest cost	773			820			1,546			1,641
Expected return on plan assets	(905		)	(752		)	(1,810		)	(1,504		)
Prior service cost	16			15			32			30
Net loss	372			344			744			687
Net periodic benefit cost	$	455		$	731		$	910		$	1,462

Non-pension Defined Benefit Postretirement Plans

Employees who are participants in the Postretirement Healthcare Plans (the "Healthcare Plans") and who meet certain eligibility requirements are entitled to postretirement healthcare benefits.

The components of net periodic benefit cost for the Healthcare Plans were as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Service cost	$	52		$	94		$	104		$	188
Interest cost	91			149			182			298
Amortization of prior service cost	(78		)	(42		)	(156		)	(84		)
Net loss	41			56			82			112
Net periodic benefit cost	$	106		$	257		$	212		$	514

It has been determined that the post-65 retiree prescription drug plans are actuarially equivalent and qualify for the Medicare Part D subsidy.

Supplemental Non-qualified Defined Benefit Plans

We have various supplemental retirement plans for key executives (the "Supplemental Plans"). The Supplemental Plans are non-qualified defined benefit plans.

The components of net periodic benefit cost for the Supplemental Plans were as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Interest cost	$	28	$	25	$	56	$	50
Net loss	12		7		24		14
Net periodic benefit cost	$	40	$	32	$	80	$	64

13

Contributions

We anticipate that we will make contributions to each of the benefit plans during 2011 and 2012. Contributions to the Healthcare Plans and the Supplemental Plans are expected to be made in the form of benefit payments. Contributions are as follows (in thousands):

	Six Months Ended June 30, 2011		Remaining Anticipated Contributions for 2011		Anticipated Contributions for 2012
Defined Benefit Pension Plan	$	—	$	—	$	904
Non-Pension Defined Benefit Postretirement Healthcare Plan	$	214	$	214	$	518
Supplemental Non-qualified Defined Benefit Plans	$	71	$	71	$	122

(8)     FAIR VALUE OF FINANCIAL INSTRUMENTS

The estimated fair values of our financial instruments were as follows (in thousands):

	June 30, 2011				December 31, 2010
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Cash and cash equivalents	$	4,312	$	4,312	$	2,045	$	2,045
Long-term debt, including current maturities	$	276,466	$	319,220	$	276,503	$	301,964

The following methods and assumptions were used to estimate the fair value of each class of our financial instruments.

Cash and Cash Equivalents

The carrying amount approximates fair value due to the short maturity of these instruments.

Long-Term Debt

The fair value of our long-term debt is estimated based on quoted market rates for debt instruments having similar maturities and similar debt ratings.

(9)    LONG TERM DEBT

In February 2010, our Series AC bonds matured. These were paid in full for $30.0 million of principal plus accrued interest of $1.2 million.

In March 2010, we completed redemption of our Series Y 9.49% bonds in full. These bonds were originally due in 2018. A total of $2.7 million was paid on March 31, 2010, which included the principal balance of $2.5 million plus accrued interest and an early redemption premium of 2.618%. The early redemption premium was recorded in unamortized loss on reacquired debt which is included in Regulatory assets on the accompanying Condensed Balance Sheets and is being amortized over the remaining term of the original bonds.

In June 2010, we completed redemption of our Series Z 9.35% bonds in full. These bonds were originally due to mature in 2021. A total of $21.8 million was paid on June 1, 2010, which included the principal balance of $20.0 million plus accrued interest and an early redemption premium of 4.675%. The early redemption premium was recorded in unamortized loss on reacquired debt which is included in Regulatory assets on the accompanying Condensed Balance Sheets and is being amortized over the remaining term of the original bonds.

14

(10)     SUPPLEMENTAL CASH FLOWS INFORMATION

	Six Months Ended June 30,
	2011			2010
	(in thousands)
Non-cash investing and financing activities -
Property, plant and equipment financed with accrued liabilities	$	2,974		$	5,897
Supplemental disclosure of cash flow information:
Cash (paid) refunded during the period for -
Interest (net of amounts capitalized)	$	(8,183	)	$	(10,959	)
Income taxes	$	15		$	6,517

(11)     COMMITMENTS AND CONTINGENCIES

Legal Proceedings

We are subject to various legal proceedings, claims and litigation as described in Note 13 of the Notes to our Financial Statements in our 2010 Annual Report on Form 10-K. There have been no material developments in any previously reported proceedings or any new material proceedings that have developed or material proceedings that have terminated during the first six months of 2011.

In the normal course of business, we are subject to various lawsuits, actions, proceedings, claims and other matters asserted under laws and regulations.  We believe the amounts provided in our condensed financial statements are adequate in light of the probable and estimable contingencies.  However, there can be no assurance that the actual amounts required to satisfy alleged liabilities from various legal proceedings, claims and other matters and to comply with applicable laws and regulations, will not exceed the amounts reflected in our condensed financial statements.  As such, costs, if any, that may be incurred in excess of those amounts provided as of June 30, 2011, cannot be reasonably determined and could have a material adverse effect on our results of operations, financial position or cash flows.

15

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

RESULTS OF OPERATIONS

The following tables provide certain financial information and operating statistics (dollars in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
	(in thousands)
Revenue	$	56,098		$	56,438		$	115,292		$	110,927
Fuel and purchased power	22,764			21,616			44,324			45,852
Gross margin	33,334			34,822			70,968			65,075
Operations and maintenance, depreciation and amortization	24,153			24,312			49,870			45,204
Operating income	9,181			10,510			21,098			19,871
Interest expense, net	(4,085		)	(4,587		)	(8,115		)	(8,058		)
Other income, net	(101		)	248			290			2,375
Income tax expense	(1,254		)	(2,069		)	(3,651		)	(4,152		)
Net income	$	3,741		$	4,102		$	9,622		$	10,036

	Electric Revenue by Customer Type
	Three Months Ended June 30,						Six Months Ended June 30,
	2011		Percentage Change		2010		2011		Percentage Change		2010
Commercial	$	17,759	10	%	$	16,104	$	35,073	14	%	$	30,643
Residential	12,773		11	%	11,546		29,943		15	%	26,025
Industrial	6,464		4	%	6,204		12,228		13	%	10,841
Municipal	783		5	%	748		1,517		8	%	1,401
Total retail sales	37,779		9	%	34,602		78,761		14	%	68,910
Contract wholesale	4,370		(38	)%	7,078		8,990		(35	)%	13,796
Wholesale off-system	7,442		(13	)%	8,539		14,395		(17	)%	17,255
Total wholesale sales	49,591		(1	)%	50,219		102,146		2	%	99,961
Other revenue	6,507		5	%	6,219		13,146		20	%	10,966
Total revenue	$	56,098	(1	)%	$	56,438	$	115,292	4	%	$	110,927

16

	Megawatt Hours Sold by Customer Type
	Three Months Ended June 30,				Six Months Ended June 30,
	2011	Percentage Change		2010	2011	Percentage Change		2010
Commercial	167,649	2	%	164,863	345,886	(1	)%	349,301
Residential	107,683	(5	)%	113,903	282,083	(2	)%	288,438
Industrial	105,861	4	%	101,425	194,610	3	%	188,088
Municipal	7,739	2	%	7,577	16,041	2	%	15,803
Total retail sales	388,932	—	%	387,768	838,620	—	%	841,630
Contract wholesale *	82,253	(32	)%	120,258	172,212	(40	)%	288,723
Wholesale off-system	278,086	(7	)%	299,064	520,242	(2	)%	530,111
Total wholesale sales	749,271	(7	)%	807,090	1,531,074	(8	)%	1,660,464
Losses and company use	39,100	(11	)%	43,792	71,771	34	%	53,511
Total energy	788,371	(7	)%	850,882	1,602,845	(6	)%	1,713,975

*    Decrease in 2011 MWh due to the termination of a wholesale contract with a previous wholesale customer who acquired ownership interest in the Wygen III facility.

	Electric Utility Power Plant Availability
	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Coal-fired plants	83.6	%	(a)	90.9	%	(b)	86.9	%	(a)	91.4	%	(b)
Other plants	86.9	%	(c)	98.8	%		92.8	%		99.3	%
Total availability	84.8	%		93.8	%		89.2	%		94.4	%

___________________________            

(a) 2011 reflects a planned major outage at the PacifiCorp-operated Wyodak plant.

(b) 2010 reflects an unplanned 12 day outage at the PacifiCorp-operated Wyodak plant due to a collapsed scrubber vessel.

(c) Reflects a planned major overhaul at Neil Simpson CT.

	Megawatt Hours Generated and Purchased
	Three Months Ended June 30,				Six Months Ended June 30,
Generated -	2011	Percentage Change		2010	2011	Percentage Change		2010
Coal-fired	386,006	(31	)%	559,258	823,844	(17	)%	989,831
Gas-fired	1,147	4	%	1,106	2,171	(45	)%	3,944
	387,153	(31	)%	560,364	826,015	(17	)%	993,775
Purchased	401,218	38	%	290,518	776,830	8	%	720,200
Total Generated and Purchased	788,371	(7	)%	850,882	1,602,845	(6	)%	1,713,975

17

	Degree Days				Degree Days
	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Heating and cooling degree days:
Actual -
Heating degree days	1,190		904		4,897		4,296
Cooling degree days	56		65		56		65
Variance from normal -
Heating degree days	19	%	9	%	14	%	4	%
Cooling degree days	(45	)%	(37	)%	(45	)%	(37	)%

Amounts are presented on a pre-tax basis unless otherwise indicated. Minor differences in amounts may result due to rounding.

Three Months Ended June 30, 2011 Compared to Three Months Ended June 30, 2010. Net income was $3.7 million compared to $4.1 million for the same period in the prior year primarily due to the following:

Gross margin decreased $1.5 million primarily due to lower margins resulting from the termination of power sales contracts upon a customer's purchase of an ownership interest in Wygen III, partially offset by increased transmission gross margin.

Operations and maintenance, depreciation and amortization expenses are comparable overall. However, there were offsetting variances with a decrease due to unplanned maintenance expenditures at the PacifiCorp-operated Wyodak plant in 2010 offset by an increase in allocation of corporation costs.

Interest expense, net is comparable to the same period in the prior year.

Other income, net is comparable to the same period in the prior year.

Income tax, expense: The effective tax rate decreased from the same period in the prior year due to a true up of unit of property depreciation flow through accounting.

Six Months Ended June 30, 2011 Compared to Six Months Ended June 30, 2010. Net income was $9.6 million compared to $10.0 million for the same period in prior year primarily due to the following:

Gross margin increased $5.9 million primarily due to recently approved rate adjustments that include a return on capital investments and increase in transmission margins, partially offset by lower margins resulting from the termination of power sales contracts upon a customer's purchase of an ownership interest in Wygen III.

Operating and maintenance, depreciation and amortization expenses increased $4.7 million primarily due to additional operating costs and depreciation expense of $2.4 million associated with the Wygen III plant which commenced commercial operation on April 1, 2010, and an increase in allocation of corporate costs, partially offset by a decrease in unplanned maintenance expenditures which were incurred at the PacifiCorp-operated Wyodak plant in 2010.

Interest expense, net is comparable; however, notable variances include a $1.5 million decrease in AFUDC associated with borrowed funds due to the completed construction at Wygen III partially offset by lower interest expense of $1.5 million primarily due to repayment of higher rate debt during 2010.

Other income, net decreased $2.1 million primarily due to a decrease in AFUDC-equity of $1.8 million due to the placement of Wygen III into commercial operation.

Income tax, expense: The effective tax rate was comparable to the same period in the prior year.

18

Significant Events

On June 13, 2011, the SDPUC dismissed Black Hills Power's request for declaratory ruling to confirm that a proposed 20 MW wind farm site near Belle Fourche, SD is reasonable and cost effective. The dismissal resulted in a decision by Black Hills Power not to proceed with this project.

Financing Transactions and Short-Term Liquidity

Financing

In February 2010, our Series AC bonds matured. These were paid in full for $30.0 million plus accrued interest of $1.2 million.

In March 2010, we completed a call of our Series Y 9.49% bonds in full. These bonds were originally due in 2018. A total of $2.7 million was paid on March 31, 2010, which includes the balance of $2.5 million plus accrued interest and an early redemption premium of 2.618%.

In June 2010, we completed a call of our Series Z 9.35% bonds in full. These bonds, originally due in 2021, were paid in full on June 1, 2010 with a payment of $21.8 million which included principal of $20.0 million, accrued interest and an early redemption premium of 4.675%.

Credit Ratings

Credit ratings impact our ability to obtain short- and long-term financing, the cost of such financing, and vendor payment terms, including collateral requirements. As of June 30, 2011, our first mortgage bonds credit ratings, as assessed by the three major credit rating agencies, were as follows:

Rating Agency	Rating	Outlook
Fitch	A-	Stable
Moody's	A3	Stable
S&P	BBB+	Stable

19

SAFE HARBOR FOR FORWARD-LOOKING INFORMATION

This Quarterly Report on Form 10-Q includes "forward-looking statements" as defined by the SEC. We make these forward-looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical facts, included in this Form 10-Q that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements. These forward-looking statements are based on assumptions which we believe are reasonable based on current expectations and projections about future events and industry conditions and trends affecting our business. Forward-looking statements involve risks and uncertainties, and certain important factors can cause actual results to differ materially from those anticipated. In some cases, forward-looking statements can be identified by terminology such as "may," "will," "could," "should," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "potentials," or "continue" or the negative of these terms or other similar terminology. There are various factors that could cause actual results to differ materially from those suggested by the forward-looking statements; accordingly, there can be no assurances that such indicated results will be realized. The forward-looking statements include the factors discussed above, the risk factors described in Item 1A. of our 2010 Annual Report on Form 10-K, in Item 1A. of Part II of this Quarterly Report on Form 10-Q filed with the SEC, and the following:

• Our ability to obtain adequate cost recovery for our retail utility operations through regulatory proceedings; our ability to receive favorable rulings in the periodic applications to recover costs for fuel and purchased power; and our ability to add power generation assets into regulatory rate base;

• Our ability to raise capital in the debt capital markets depends upon our financial condition and credit ratings, among other things. If our financial condition deteriorates unexpectedly, or our credit ratings are lowered, we may not be able to refinance some short-term debt and fund our power generation projects on reasonable terms, if at all;

• Our ability to obtain from utility commissions any requisite determination of prudency to support resource planning and development programs we propose to implement;

• The timing and extent of scheduled and unscheduled outages of power generation facilities;

• The possibility that we may be required to take impairment charges to reduce the carrying value of some of our long-lived assets when indicators of impairment emerge;

• Changes in business and financial reporting practices arising from the enactment of the Energy Policy Act of 2005 and subsequent rules and regulations promulgated thereunder;

• Our ability to remedy any deficiencies that may be identified in the review of our internal controls;

• Our ability to successfully complete labor negotiations with our union;

• Our ability to recover our borrowing costs, including debt service costs, in our customer rates;

• Liabilities of environmental conditions, including remediation and reclamation obligations under environmental laws;

• Our ability to complete the permitting, construction, start-up and operations of power generating facilities in a cost-effective and timely manner;

• The timing, volatility and extent of changes in energy-related and commodity prices, interest rates, energy and commodity supply or volume, the cost and availability of transportation of commodities, and demand for our services, all of which can affect our earnings, liquidity position and the underlying value of our assets;

• Our ability to effectively use derivative financial instruments to hedge commodity risks;

• Our ability to minimize defaults on amounts due from counterparty transactions;

• Changes in or compliance with laws and regulations, particularly those relating to taxation, safety and protection of the environment and to recover those expenditures in customer rates, where applicable;

20

• Federal and state laws concerning climate change and air emissions, including emission reduction mandates and renewable energy portfolio standards, may materially increase our generation and production costs and could render some of our generating units uneconomical to operate and maintain;

• Weather and other natural phenomena;

• Industry, market, political and economic changes, including the impact of consolidations and changes in competition;

• The effect of accounting policies issued periodically by accounting standard-setting bodies;

• The cost and effects on our business, including insurance, resulting from terrorist actions or responses to such actions or events;

• The outcome of any ongoing or future litigation or similar disputes and the impact on any such outcome or related settlements on our financial condition or results of operations;

• Price risk due to marketable securities held as investments in benefit plans;

• General economic and political conditions, including tax rates or policies and inflation rates; and

• Other factors discussed from time to time in our other filings with the SEC.

New factors that could cause actual results to differ materially from those described in forward-looking statements emerge from time to time, and it is not possible for us to predict all such factors, or the extent to which any such factor or combination of factors may cause actual results to differ from those contained in any forward-looking statement. We assume no obligation to update publicly any such forward-looking statements, whether as a result of new information, future events, or otherwise.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our Chief Executive Officer and Chief Financial Officer evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934 (Exchange Act)) as of June 30, 2011. Based on their evaluation, they have concluded that our disclosure controls and procedures are effective.

There were no changes in our internal control over financial reporting during the quarter ended June 30, 2011 that materially affected or are reasonably likely to materially affect our internal control over financial reporting.

BLACK HILLS POWER, INC.

Part II - Other Information

Item 1.    Legal Proceedings

For information regarding legal proceedings, see Note 13 of Notes to Financial Statements in Item 8 of our 2010 Annual Report on Form 10-K and Note 11 of our Notes to Condensed Financial Statements in this Quarterly Report on Form 10-Q, which information from Note 13 is incorporated by reference into this item.

Item 1A.    Risk Factors

Our Risk Factors are documented in Item 1A. of Part I in our Annual Report on Form 10-K for the year ended December 31, 2010.

21

Item 6.    Exhibits

Exhibit 31.1     Certification of Chief Executive Officer pursuant to Rule 13a - 14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes - Oxley Act of 2002.

Exhibit 31.2    Certification of Chief Financial Officer pursuant to Rule 13a - 14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes - Oxley Act of 2002.

Exhibit 32.1    Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes - Oxley Act of 2002.

Exhibit 32.2    Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes - Oxley Act of 2002.

22

BLACK HILLS POWER, INC.

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 thereunto duly authorized.

BLACK HILLS POWER, INC.

/S/ DAVID R. EMERY

David R. Emery, Chairman

and Chief Executive Officer    

/S/ ANTHONY S. CLEBERG

Anthony S. Cleberg, Executive Vice President

and Chief Financial Officer

Dated: August 11, 2011

23

EXHIBIT INDEX

Exhibit NumberDescription

Exhibit 31.1     Certification of Chief Executive Officer pursuant to Rule 13a - 14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes - Oxley Act of 2002.

Exhibit 31.2    Certification of Chief Financial Officer pursuant to Rule 13a - 14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes - Oxley Act of 2002.

Exhibit 32.1    Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes - Oxley Act of 2002.

Exhibit 32.2    Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes - Oxley Act of 2002.

24

EX-31.1

Exhibit 31.1

CERTIFICATION

I, David R. Emery, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Black Hills Power, Inc.;

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(s) 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; and

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; and

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.

5. The registrant's other certifying officer(s) 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 registrant's board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 11, 2011
	/S/ DAVID R. EMERY
	David R. Emery
	Chairman and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Anthony S. Cleberg, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Black Hills Power, Inc.;

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(s) 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.

5. The registrant's other certifying officer(s) 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 registrant's board of directors (or persons performing the equivalent functions):

a)    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 11, 2011
	/S/ ANTHONY S. CLEBERG
	Anthony S. Cleberg
	Executive Vice President and
	Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Black Hills Power, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, David R. Emery, Chairman and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of 2002, 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.

Date: August 11, 2011
	/S/ DAVID R. EMERY
	David R. Emery
	Chairman and Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Black Hills Power, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Anthony S. Cleberg, Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of 2002, 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.

Date: August 11, 2011
	/S/ ANTHONY S. CLEBERG
	Anthony S. Cleberg
	Executive Vice President and
	Chief Financial Officer

XML



Condensed Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 4,312	$ 2,045
Receivables - customers, net	21,736	28,716
Receivables - affiliates	3,267	6,891
Other receivables, net	466	2,077
Money pool notes receivable	49,827	39,862
Materials, supplies and fuel	21,347	21,259
Regulatory assets, current	5,627	3,584
Other, current assets	3,780	3,712
Total current assets	110,362	108,146
Investments	4,534	4,396
Property, plant and equipment	1,000,649	962,640
Less accumulated depreciation and amortization	(321,903)	(304,800)
Total property, plant and equipment, net	678,746	657,840
Other assets:
Regulatory assets, non-current	35,765	37,740
Other, non-current assets	3,774	3,610
Total other assets	39,539	41,350
TOTAL ASSETS	833,181	811,732
Current liabilities:
Current maturities of long-term debt	78	81
Accounts payable	13,873	14,828
Accounts payable - affiliates	15,299	12,562
Accrued liabilities	16,406	15,541
Regulatory liabilities, current	1,193	1,932
Deferred income tax liabilities, current	573	859
Total current liabilities	47,422	45,803
Long-term debt, net of current maturities	276,388	276,422
Deferred credits and other liabilities:
Deferred income tax liability, non-current	125,507	122,319
Regulatory liabilities, non-current	34,633	28,276
Benefit plan liabilities	20,695	19,581
Other, deferred credits and other liabilities	9,476	9,914
Total deferred credits and other liabilities	190,311	180,090
Stockholder's equity:
Common stock $1 par value; 50,000,000 shares authorized; 23,416,396 shares issued	23,416	23,416
Additional paid-in capital	39,575	39,575
Retained earnings	257,310	247,688
Accumulated other comprehensive loss	(1,241)	(1,262)
Total stockholder's equity	319,060	309,417
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY	$ 833,181	$ 811,732

XML



Condensed Consolidated Balance Sheet (Parentheticals) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Common Stock Par Value	$ 1	$ 1
Common Stock Shares authorized	50,000,000	50,000,000
Common Stock Shares Issued	23,416,396	23,416,396

XML



Document and Entity Information	6 Months Ended
	Jun. 30, 2011	Jul. 29, 2011
Document Information [Line Items]
Entity Registrant Name	BLACK HILLS POWER INC
Entity Central Index Key	0000012400
Document Type	10-Q
Document Period End Date	Jun. 30, 2011
Amendment Flag	false
Document Fiscal Year End Focus	2011
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock Share Outstanding		23,416,396

XML



Employee Benefit Plans

6 Months Ended

Jun. 30, 2011

Employee Benefit Plans [Abstract]

Pension and Other Postretirement Benefits Disclosure [Text Block]

EMPLOYEE BENEFIT PLANS

Defined Benefit Pension Plan

We have a noncontributory defined benefit pension plan (the "Pension Plan") covering employees who meet certain eligibility requirements.

The components of net periodic benefit cost for the Pension Plan were as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Service cost	$	199		$	304		$	398		$	608
Interest cost	773			820			1,546			1,641
Expected return on plan assets	(905		)	(752		)	(1,810		)	(1,504		)
Prior service cost	16			15			32			30
Net loss	372			344			744			687
Net periodic benefit cost	$	455		$	731		$	910		$	1,462

Non-pension Defined Benefit Postretirement Plans

Employees who are participants in the Postretirement Healthcare Plans (the "Healthcare Plans") and who meet certain eligibility requirements are entitled to postretirement healthcare benefits.

The components of net periodic benefit cost for the Healthcare Plans were as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Service cost	$	52		$	94		$	104		$	188
Interest cost	91			149			182			298
Amortization of prior service cost	(78		)	(42		)	(156		)	(84		)
Net loss	41			56			82			112
Net periodic benefit cost	$	106		$	257		$	212		$	514

It has been determined that the post-65 retiree prescription drug plans are actuarially equivalent and qualify for the Medicare Part D subsidy.

Supplemental Non-qualified Defined Benefit Plans

We have various supplemental retirement plans for key executives (the "Supplemental Plans"). The Supplemental Plans are non-qualified defined benefit plans.

The components of net periodic benefit cost for the Supplemental Plans were as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Interest cost	$	28	$	25	$	56	$	50
Net loss	12		7		24		14
Net periodic benefit cost	$	40	$	32	$	80	$	64

Contributions

We anticipate that we will make contributions to each of the benefit plans during 2011 and 2012. Contributions to the Healthcare Plans and the Supplemental Plans are expected to be made in the form of benefit payments. Contributions are as follows (in thousands):

	Six Months Ended June 30, 2011		Remaining Anticipated Contributions for 2011		Anticipated Contributions for 2012
Defined Benefit Pension Plan	$	—	$	—	$	904
Non-Pension Defined Benefit Postretirement Healthcare Plan	$	214	$	214	$	518
Supplemental Non-qualified Defined Benefit Plans	$	71	$	71	$	122

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Accounts Receivable

6 Months Ended

Jun. 30, 2011

Accounts Receivable [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Text Block]

ACCOUNTS RECEIVABLE

We maintain an allowance for doubtful accounts which reflects our best estimate of probable uncollectible trade receivables. We regularly review our trade receivable allowance by considering such factors as historical experience, credit worthiness, the age of the receivable balances and current economic conditions that may affect the ability to pay.

Accounts receivable consist of sales to residential, commercial, industrial, municipal and other customers all of which do not bear interest. These accounts receivable balances are stated at billed and unbilled amounts net of write-offs. Approximately 31% of the accounts receivable balance consists of unbilled revenue as of June 30, 2011.

The allowance for doubtful accounts represents our best estimate of existing accounts receivable that will ultimately be uncollected. The allowance is calculated by applying estimated write-off factors to various classes of outstanding receivables, including unbilled revenue. The write-off factors used to estimate uncollectible accounts are based upon consideration of both historical collections experience and management's best estimate of future collection success given the existing collections environment.

In specific cases where we are aware of a customer's inability or reluctance to pay, we record an allowance for doubtful accounts against amounts due to reduce the net receivable balance to the amount we reasonably expect to collect. However, if circumstances change, our estimate of the recoverability of accounts receivable could be affected. Circumstances which could affect our estimates include, but are not limited to, customer credit issues, the level of commodity prices, customer deposits and general economic conditions. Accounts are written off once they are deemed to be uncollectible or the time allowed for dispute under the contract has expired.

Following is a summary of accounts receivable balances (in thousands):

	June 30, 2011			December 31, 2010
Accounts receivable trade	$	15,239		$	21,365
Unbilled revenues	6,655			7,581
Total accounts receivable - customers	21,894			28,946
Allowance for doubtful accounts	(158		)	(230		)
Receivable - customers, net	$	21,736		$	28,716

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Long term Debt

6 Months Ended

Jun. 30, 2011

Long Term Debt [Abstract] [Abstract]

Long term Debt [Text Block]

LONG TERM DEBT

In February 2010, our Series AC bonds matured. These were paid in full for $30.0 million of principal plus accrued interest of $1.2 million.

In March 2010, we completed redemption of our Series Y 9.49% bonds in full. These bonds were originally due in 2018. A total of $2.7 million was paid on March 31, 2010, which included the principal balance of $2.5 million plus accrued interest and an early redemption premium of 2.618%. The early redemption premium was recorded in unamortized loss on reacquired debt which is included in Regulatory assets on the accompanying Condensed Balance Sheets and is being amortized over the remaining term of the original bonds.

In June 2010, we completed redemption of our Series Z 9.35% bonds in full. These bonds were originally due to mature in 2021. A total of $21.8 million was paid on June 1, 2010, which included the principal balance of $20.0 million plus accrued interest and an early redemption premium of 4.675%. The early redemption premium was recorded in unamortized loss on reacquired debt which is included in Regulatory assets on the accompanying Condensed Balance Sheets and is being amortized over the remaining term of the original bonds.

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Supplemental Cash Flows Information

6 Months Ended

Jun. 30, 2011

Supplemental Cash Flows Information [Abstract]

Cash Flow, Supplemental Disclosures [Text Block]

SUPPLEMENTAL CASH FLOWS INFORMATION

	Six Months Ended June 30,
	2011			2010
	(in thousands)
Non-cash investing and financing activities -
Property, plant and equipment financed with accrued liabilities	$	2,974		$	5,897
Supplemental disclosure of cash flow information:
Cash (paid) refunded during the period for -
Interest (net of amounts capitalized)	$	(8,183	)	$	(10,959	)
Income taxes	$	15		$	6,517

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Fair Value Instruments

6 Months Ended

Jun. 30, 2011

Fair Value of Financial Instruments [Abstract]

Fair Value Disclosures [Text Block]

FAIR VALUE OF FINANCIAL INSTRUMENTS

The estimated fair values of our financial instruments were as follows (in thousands):

	June 30, 2011				December 31, 2010
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Cash and cash equivalents	$	4,312	$	4,312	$	2,045	$	2,045
Long-term debt, including current maturities	$	276,466	$	319,220	$	276,503	$	301,964

The following methods and assumptions were used to estimate the fair value of each class of our financial instruments.

Cash and Cash Equivalents

The carrying amount approximates fair value due to the short maturity of these instruments.

Long-Term Debt

The fair value of our long-term debt is estimated based on quoted market rates for debt instruments having similar maturities and similar debt ratings.

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Management's Statement

6 Months Ended

Jun. 30, 2011

Management's Statement [Abstract]

Basis of Accounting

MANAGEMENT'S STATEMENT

The condensed financial statements included herein have been prepared by Black Hills Power, Inc. (the "Company," "we," "us," or "our"), without audit, pursuant to the rules and regulations of the SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such rules and regulations; however, we believe that the footnotes adequately disclose the information presented. These condensed financial statements should be read in conjunction with the financial statements and the notes thereto, included in our 2010 Annual Report on Form 10-K filed with the SEC.

Accounting methods historically employed require certain estimates as of interim dates. The information furnished in the accompanying condensed financial statements reflects all adjustments which are, in the opinion of management, necessary for a fair presentation of the June 30, 2011, December 31, 2010 and June 30, 2010 financial information and are of a normal recurring nature. The results of operations for the three and six months ended June 30, 2011 and June 30, 2010, and our financial condition as of June 30, 2011 and December 31, 2010 are not necessarily indicative of the results of operations and financial condition to be expected as of or for any other period.

Certain prior year data presented in the condensed financial statements has been reclassified to conform to the current year presentation. These reclassifications had no effect on our financial position, results of operations, or cash flows.

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Regulatory Assets and Liabilities

6 Months Ended

Jun. 30, 2011

Regulatory Accounting [Abstract]

Public Utilities Disclosure [Text Block]

REGULATORY ASSETS AND LIABILITIES

We had the following regulatory assets and liabilities (in thousands):

	Recovery Period	June 30, 2011		December 31, 2010
Regulatory assets:
Unamortized loss on reacquired debt	14 years	$	2,891	$	3,016
AFUDC	Up to 45 years	9,489		9,489
Defined benefit postretirement plans	Up to 13 years	18,615		18,049
Deferred energy costs	Less than one year	5,346		3,584
Flow through accounting	Up to 35 years	4,284		4,772
Other		767		2,414
Total regulatory assets		$	41,392	$	41,324
Regulatory liabilities:
Cost of removal for utility plant	Up to 53 years	$	22,851	$	15,429
Defined benefit postretirement plans	Up to 13 years	10,874		10,204
Other		2,101		4,575
Total regulatory liabilities		$	35,826	$	30,208

Regulatory assets are primarily recorded for the probable future revenue to recover the costs associated with defined benefit postretirement plans, future income taxes related to the deferred tax liability for the equity component of AFUDC of utility assets and unamortized losses on reacquired debt. To the extent that energy costs are under-recovered or over-recovered during the year, they are recorded as a regulatory asset or liability, respectively. Regulatory liabilities include the probable future decrease in rate revenues related to a decrease in deferred tax liabilities for prior reductions in statutory federal income tax rates, gains associated with regulated utilities' defined benefit postretirement plans and the cost of removal for utility plant, recovered through our electric utility rates. Regulatory assets are included in Regulatory assets, current and Regulatory assets, non-current on the accompanying Condensed Balance Sheets. Regulatory liabilities are included in Regulatory liabilities, current and Regulatory liabilities, non-current on the accompanying Condensed Balance Sheets.

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Comprehensive Income

6 Months Ended

Jun. 30, 2011

Other Comprehensive Income [Abstract]

Comprehensive Income Note [Text Block]

COMPREHENSIVE INCOME

The following table presents the components of Comprehensive income (in thousands):

	Three Months Ended June 30, 2011					Six Months Ended June 30, 2011
Net income				$	3,741				$	9,622
Other comprehensive income, net of tax:
Fair value adjustment on derivatives designated as cash flow hedges	$	—				$	—
Taxes	—					—
Fair value adjustment on derivatives designated as cash flow hedges, net of tax				—					—
Reclassification adjustments included in net income	$	16				$	32
Taxes	(6		)			(11		)
Reclassification adjustments included in net income, net of tax				10					21
Comprehensive income				$	3,751				$	9,643

	Three Months Ended June 30, 2010						Six Months Ended June 30, 2010
Net income				$	4,102					$	10,036
Other comprehensive income, net of tax:
Fair value adjustment on derivatives designated as cash flow hedges	$	(10	)				$	317
Taxes	4						(111		)
Fair value adjustment on derivatives designated as cash flow hedges, net of tax				(6		)				206
Reclassification adjustments included in net income	$	16					$	33
Taxes	(6		)				(12		)
Reclassification adjustments included in net income, net of tax				10						21
Comprehensive income				$	4,106					$	10,263

Balances by classification included within Accumulated other comprehensive loss on the accompanying Condensed Balance Sheets were as follows (in thousands):

	June 30, 2011			December 31, 2010
Derivatives designated as cash flow hedges	$	(827	)	$	(848	)
Employee benefit plans	(414		)	(414		)
Total accumulated other comprehensive loss	$	(1,241	)	$	(1,262	)

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Related Party Transactions

6 Months Ended

Jun. 30, 2011

Related Party Transactions [Abstract]

Related Party Transactions Disclosure [Text Block]

RELATED-PARTY TRANSACTIONS

Receivables and Payables

We have accounts receivable and accounts payable balances related to transactions with other BHC subsidiaries. The balances were as follows (in thousands):

	June 30, 2011		December 31, 2010
Receivable - affiliates	$	3,267	$	6,891
Accounts payable - affiliates	$	15,299	$	12,562

Money Pool Notes Receivable and Notes Payable

We have entered into a Utility Money Pool Agreement (the "Agreement") with BHC, Cheyenne Light and Black Hills Energy. Under the Agreement, we may borrow from our Parent. The Agreement restricts us from loaning funds to our Parent or to any of our Parent's non-utility subsidiaries; the Agreement does not restrict us from making dividends to our Parent. Borrowings under the agreement bear interest at the daily cost of external funds as defined under the Agreement, or if there are no external funds outstanding on that date, then the rate will be the daily one month LIBOR rate plus 100 basis points.

We had the following balances with the Utility Money Pool (in thousands):

	June 30, 2011		December 31, 2010
Money pool notes receivable	$	49,827	$	39,862

Advances under the Utility Money Pool notes bear interest at 2.75% above the daily LIBOR rate (which equates to 2.94% at June 30, 2011). Net interest (income) expense relating to balances for the Utility Money Pool was as follows (in thousands):

	Three Months Ended June 30,					Six Months Ended June 30,
	2011			2010		2011			2010
Net interest (income) expense	$	(343	)	$	4	$	(660	)	$	(50	)

Other Balances and Transactions

The sales and purchases with related parties were as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Revenues:
Transmission of electricity sold to Black Hills Wyoming	$	58	$	769	$	220	$	942
Electricity and dispatch services sold to Cheyenne Light	$	63	$	326	$	248	$	874
Expenses:
Coal purchases from WRDC	$	5,758	$	3,900	$	10,645	$	7,984
Purchase of excess power generated at Cheyenne Light	$	3,660	$	2,119	$	5,467	$	4,710
Natural gas from Enserco	$	62	$	200	$	223	$	722
Corporate support services from Parent and Black Hills Energy	$	4,509	$	4,212	$	9,683	$	8,216

We have funds on deposit from Black Hills Wyoming for transmission system reserve which are included in Other, deferred credits and other liabilities on the accompanying Condensed Balance Sheets. We have transmission system reserve balances as follows (in thousands):

	June 30, 2011		December 31, 2010
Funds on deposit from affiliate	$	2,076	$	2,044

Interest on the funds on deposit from Black Hills Wyoming accrues quarterly at an average quarterly prime rate (3.25% at June 30, 2011).

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Interest expense paid to affiliate	$	16	$	16	$	33	$	32

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Condensed Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities:
Net income	$ 9,622	$ 10,036
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	13,323	10,418
Deferred income tax	4,026	11,029
Employee benefits	1,202	2,043
AFUDC - equity	(442)	(2,237)
Other, net	514	159
Change in operating assets and liabilities -
Accounts receivable and other current assets	11,224	(1,953)
Accounts payable and other current liabilities	866	(10,495)
Regulatory assets	166	(441)
Regulatory liabilities	(2,358)	0
Other operating activities	(1,552)	2,027
Net cash provided by operating activities	36,591	20,586
Investing activities:
Property, plant and equipment additions	(24,183)	(40,241)
Change in money pool notes receivable, net	(9,965)	57,737
Other investing activities	(139)	3,392
Net cash provided by (used in) investing activities	(34,287)	20,888
Financing activities:
Long-term debt - repayments	(37)	(52,532)
Change in money pool notes payable, net	0	13,028
Other financing activities	0	(1,176)
Net cash (used in) provided by financing activities	(37)	(40,680)
Net change in cash and cash equivalents	2,267	794
Cash and cash equivalents, beginning of period	2,045	1,709
Cash and cash equivalents, end of period	$ 4,312	$ 2,503

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Recently Adopted and Recently Issued Accounting Pronouncements and Legislation

6 Months Ended

Jun. 30, 2011

Recently Adopted and Recently Issued Accounting Standards and Legislation [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Text Block]

RECENTLY ADOPTED AND RECENTLY ISSUED ACCOUNTING STANDARDS AND LEGISLATION

Other Comprehensive Income, ASU No. 2011-05

FASB issued an accounting standards update amending ASC 220 to improve the comparability, consistency and transparency of reporting of comprehensive income. It amends existing guidance by allowing only two options for presenting the components of net income and other comprehensive income: (1) in a single continuous financial statement, statement of comprehensive income or (2) in two separate but consecutive financial statements, consisting of an income statement followed by a separate statement of other comprehensive income. Also, items that are reclassified from other comprehensive income to net income must be presented on the face of the financial statements. ASU No. 2011-05 requires retrospective application, and it is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011, with early adoption permitted. We believe the adoption of this update will change the order in which certain financial statements are presented and provide additional detail on those financial statements when applicable, but will not have any other impact on our financial statements.

Fair Value Measurement, ASU No. 2011-04

FASB issued an accounting standards update amending ASC 820 to achieve common fair value measurement and disclosure requirements between U.S. GAAP and IFRS. This amendment changes the wording used to describe fair value and requires additional disclosures. We do not expect this amendment, which is effective for interim and annual periods beginning after December 31, 2011, to have an impact on our financial position, results of operations, or cash flows.

Patient Protection and Affordable Care Act (HR 3590)

In March 2010, the President of the United States signed into law comprehensive healthcare reform legislation under the PPACA as amended by the Healthcare and Education Reconciliation Act. The potential impact on the Company, if any, cannot be determined until regulations are promulgated under the PPACA.  Included among the provisions of the PPACA is a change in the tax treatment of the Medicare Part D subsidy (the "subsidy") which affects our Non-Pension Postretirement Benefit Plan. Internal Revenue Code Section 139A has been amended to eliminate the deduction of the subsidy in reducing income for years beginning after December 31, 2012. The impact of this change in the tax treatment of the subsidy had an immaterial effect on our financial position, results of operations and cash flows. The Company will continue to assess the accounting implications of the PPACA as related regulations and interpretations become available.

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Commitment and Contingencies

6 Months Ended

Jun. 30, 2011

Commitments and Contingencies [Abstract]

Commitments and Contingencies Disclosure [Text Block]

COMMITMENTS AND CONTINGENCIES

Legal Proceedings

We are subject to various legal proceedings, claims and litigation as described in Note 13 of the Notes to our Financial Statements in our 2010 Annual Report on Form 10-K. There have been no material developments in any previously reported proceedings or any new material proceedings that have developed or material proceedings that have terminated during the first six months of 2011.

In the normal course of business, we are subject to various lawsuits, actions, proceedings, claims and other matters asserted under laws and regulations.  We believe the amounts provided in our condensed financial statements are adequate in light of the probable and estimable contingencies.  However, there can be no assurance that the actual amounts required to satisfy alleged liabilities from various legal proceedings, claims and other matters and to comply with applicable laws and regulations, will not exceed the amounts reflected in our condensed financial statements.  As such, costs, if any, that may be incurred in excess of those amounts provided as of June 30, 2011, cannot be reasonably determined and could have a material adverse effect on our results of operations, financial position or cash flows.

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Condensed Statements of Income (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Operating revenue	$ 56,098	$ 56,438	$ 115,292	$ 110,927
Operating expenses:
Fuel and purchased power	22,764	21,616	44,324	45,852
Operations and maintenance	16,195	17,356	34,185	32,361
Depreciation and amortization	6,761	5,684	13,323	10,418
Taxes - property	1,197	1,272	2,362	2,425
Total operating expenses	46,917	45,928	94,194	91,056
Operating income	9,181	10,510	21,098	19,871
Other income (expense):
Interest expense	(4,533)	(5,803)	(8,753)	(11,283)
AFUDC - borrowed	88	187	268	1,801
Interest income	360	1,029	370	1,424
AFUDC - equity	155	230	442	2,237
Other income (expense), net	(256)	18	(152)	138
Total other income (expense)	(4,186)	(4,339)	(7,825)	(5,683)
Income before income taxes	4,995	6,171	13,273	14,188
Income tax expense	(1,254)	(2,069)	(3,651)	(4,152)
Net income	$ 3,741	$ 4,102	$ 9,622	$ 10,036