SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549


                                    FORM 11-K


                                  ANNUAL REPORT

                        PURSUANT TO SECTION 15 (d) OF THE

                         SECURITIES EXCHANGE ACT OF 1934







              For the fiscal years ended December 31, 2000 and 1999


                        Commission File Number 333-52664


                             BLACK HILLS CORPORATION

                          401K RETIREMENT SAVINGS PLAN


                             BLACK HILLS CORPORATION

                                625 NINTH STREET

                                   PO BOX 1400

                         RAPID CITY, SOUTH DAKOTA 57709



Black Hills Corporation Retirement Savings Plan Financial statements as of December 31, 2000 and 1999 together with report of independent public accountants

Index to financial statements and supplemental schedules Page Report of independent public accountants 1 Statements of net assets available for benefits 2 Statements of changes in net assets available for benefits 3 Notes to financial statements 4 Schedule H, line 4i-- Schedule of Assets (Held At End of Year) 7 Schedule G, Part III-- Nonexempt Transactions 9

Report of independent public accountants To the Trustees of Black Hills Corporation Retirement Savings Plan: We have audited the accompanying statements of net assets available for benefits of the Black Hills Corporation Retirement Savings Plan as of December 31, 2000 and 1999, and the related statements of changes in net assets available for benefits for the years then ended December 31, 2000 and 1999. These financial statements and the supplemental schedules referred to below are the responsibility of the Plan's management. Our responsibility is to express an opinion on these financial statements and supplemental schedules based on our audits. We conducted our audits in accordance with auditing standards generally accepted in the United States. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and supplemental schedules are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and supplemental schedules. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of the Black Hills Corporation Retirement Savings Plan as of December 31, 2000 and 1999, and the changes in net assets available for benefits for the years then ended, in conformity with accounting principles generally accepted in the United States. Our audits were performed for the purpose of forming an opinion on the basic financial statements taken as a whole. The supplemental schedules of assets held for investment purposes and nonexempt transactions are presented for purposes of additional analysis and are not a required part of the basic financial statements but are supplementary information required by the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. These supplemental schedules have been subjected to the auditing procedures applied in the audit of the basic financial statements and, in our opinion, are fairly stated in all material respects in relation to the basic financial statements taken as a whole. Arthur Andersen LLP Minneapolis, Minnesota, June 1, 2001 1

Black Hills Corporation Retirement Savings Plan Statements of net assets available for benefits As of December 31 2000 1999 ----------- ---------- CASH $ 7,995 $ 49,409 INVESTMENTS, at fair value: Cash fund 45,729 - Collective trusts 7,617,449 7,490,837 Mutual funds 10,727,912 9,909,127 Common stock 452,537 - Black Hills Corporation common stock 11,958,351 5,668,478 Participant loans 813,350 819,385 Other - 249,511 ---------- ---------- Total investments 31,615,328 24,137,338 CONTRIBUTIONS RECEIVABLE: Employee 15,989 34,147 Employer 5,980 - INVESTMENT TRANSACTIONS PENDING 3,543 19,951 ----------- ----------- NET ASSETS AVAILABLE FOR BENEFITS $31,648,835 $24,240,845 =========== =========== The accompanying notes are an integral part of these statements. 2

Black Hills Corporation Retirement Savings Plan Statements of changes in net assets available for benefits For the years ended December 31 2000 1999 ----------- ----------- NET ASSETS AVAILABLE FOR BENEFITS, beginning of year $24,240,845 $22,384,307 ----------- ----------- INCREASES (DECREASES) DURING THE YEAR: Participant contributions 3,905,269 1,367,450 Employer matching contribution 574,290 - Investment interest and dividends 1,372,971 946,130 Net appreciation in fair value of investments 3,033,933 1,053,592 Net realized gain (loss) on sale of investments 363,713 (8,552) Administrative expenses (2,750) (2,350) Other 16,214 12,632 Distributions to participants (1,855,650) (1,512,364) ----------- ----------- Net increase in net assets 7,407,990 1,856,538 ----------- ----------- NET ASSETS AVAILABLE FOR BENEFITS, end of year $31,648,835 $24,240,845 =========== =========== The accompanying notes are an integral part of these statements. 3

BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN Notes to financial statements December 31, 2000 and 1999 1 Description of the Plan - ---------------------------- The following is not a comprehensive description of the Plan and, therefore, does not include all situations and limitations covered by the Plan. Participants should refer to the plan agreement for more complete information. General The Black Hills Corporation Retirement Savings Plan (the Plan) is a defined contribution plan for eligible employees of Black Hills Power, Inc., the assumed business name of the electric utility of Black Hills Corporation (the Company), and certain subsidiary companies of Black Hills Corporation. The eligible employees may have a percentage of their compensation withheld and contributed to the Plan, subject to limitations, as defined. It is subject to the provisions of the Employment Retirement Income Security Act of 1974. The Plan is designed to comply with the provisions of Section 401(k) of the Internal Revenue Code (the Code). Merrill Lynch serves as the asset custodian and record keeper. The Black Hills Corporation Benefits Committee (the Committee) is the trustee of the Plan, and the Company's risk manager serves as the administrator of the Plan. Plan expenses Administrative fees of approximately $60,800 and $17,100 were paid by the Company in 2000 and 1999, respectively. Eligibility and vesting Employees are eligible to participate in the Plan on the first day of employment. Participants are immediately vested in the value of their pretax salary reduction contributions. Participants vest 20 percent per year in matching contributions until reaching five years of service. At that time, participants are 100 percent vested in matching contributions. Participants also become fully vested in employer contributions if their employment with the Company is terminated due to retirement at or after attainment of age 65, total and permanent disability, or death. Contributions The maximum percentage of compensation an employee may contribute to the Plan is 20 percent, with an annual maximum contribution of $10,500, as provided by the Internal Revenue Code. There is no limit to the number of times participants may change their contribution percentages. Amounts contributed are invested at the discretion of plan participants in any of the 22 investment options or individual investments as directed by the participant. Effective January 1, 2000 (effective May 1, 2000 for employees represented by the collectively bargained unit), the Plan was amended to include a discretionary dollar-for-dollar Company matching contribution, up to a maximum of 3 percent of an individual participant's compensation. Rollover contributions The Plan received $2,102,946 and $41,544 in rollover transfers from other qualified plans in 2000 and 1999, respectively, which are included in participant contributions on the statements of changes in net assets available for benefits. In 2000 approximately $1.7 million of the rollover transfers came from the acquisition of Indeck Capital, Inc., which was merged into Black Hills Energy Capital, Inc. 4

Participant loans The Plan contains a loan provision which allows participants to borrow up to a maximum equal to the lesser of $50,000 or 50 percent of their vested account balances at an interest rate of 1 percent over the prime interest rate and to repay the loan through payroll deductions, with a maximum repayment period of five years. During 2000 and 1999, interest rates on outstanding participant loans ranged from 8.75 percent to 10.50 percent and from 8.75 percent to 9.50 percent, respectively. Loans are prohibited for terminated employees. Distributions to participants Employee account balances are distributable upon retirement, disability, death, termination from the Company or hardship. Upon the occurrence of one of these events, a participant (or the participant's beneficiary in the case of death) may receive his or her account balance as a lump-sum payment or installment payments over a period of no more than 10 years. Amendments and termination The Company reserves the right to amend or terminate the Plan at any time. Upon termination of the Plan participants become 100 percent vested, and all assets will be distributed among the participants in accordance with plan provisions. 2 Summary of significant accounting policies - ----------------------------------------------- Basis of accounting The accompanying financial statements have been prepared using the accrual basis of accounting. Investment valuation and income recognition Investments of the Plan are stated at fair value. Shares of registered investment companies are valued at quoted market prices, which represent the net asset value of shares held by the Plan at year-end. Realized gains and losses on sales of investments represent the difference between the net proceeds from the sale of investments and their market values at the beginning of the year or original cost if purchased during the year. Unrealized appreciation or depreciation of investments represents changes in the market value of investments since the beginning of the year. Purchases and sales of securities are reflected on a trade-date basis. Interest income is recognized when earned. Dividend income is recorded on the ex-dividend date. Use of estimates The preparation of financial statements in accordance with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of net assets available for benefits at the date of the financial statements and the reported amount of changes in net assets available for benefits during the reporting period. Ultimate results could differ from those estimates. Reclassification Certain 1999 numbers have been reclassified to conform to the 2000 presentation. 3 Investments - ---------------- The investment options of the Plan at December 31, 2000 consist of deposits in collective trusts of Merrill Lynch, mutual funds, common stock of the Company and other investments as self-directed by participants. Units (shares) of the various investment funds are valued daily at net asset value (which equals market value). The investment options are participant directed and participants may change their investment elections daily. 5

The following presents investments that represent 5 percent or more of the Plan's net assets as of December 31: 2000 1999 ---------- ---------- Merrill Lynch Retirement Preservation Trust $3,173,244 $2,889,423 Merrill Lynch Equity Index Trust 4,444,205 4,601,414 Managers International Equity Fund 2,490,145 2,865,676 Merrill Lynch Growth Fund 2,103,703 2,827,831 Davis New York Venture Fund 1,588,978 876,758 Black Hills Corporation common stock 11,958,351 5,668,478 Merrill Lynch Capital Fund * 1,069,605 *Under 5 percent. 4 Tax status - --------------- The Plan obtained its latest determination letter on June 19, 1991, in which the Internal Revenue Service stated that the Plan, as then designed, was in compliance with the applicable requirements of the Code. The Plan has been amended since receiving the determination letter; however, the plan administrator and the Plan's legal counsel believe that the Plan is currently designed and being operated in compliance with the applicable requirements of the Code. The Plan sponsor is committed to taking all action necessary, if any, to maintain the Plan's qualified status. 5 Party-in-interest transactions - ----------------------------------- The Plan invests in Merrill Lynch funds and Black Hills Corporation stock. These transactions qualify as exempt party-in-interest transactions. 6

BLack Hills Corporation Retirement Savings Plan (Employer identification number: 46-0111677) (Plan number: 003) Schedule H, line 4i-- Schedule of Assets (Held At End of Year) As of December 31, 2000 Current Description Cost value - ----------------------------------------------- -------- ----------- CASH FUND: Merrill Lynch Ready Assets* ** $ 45,729 Total cash fund 45,729 COLLECTIVE TRUSTS: Merrill Lynch Retirement Preservation Trust* ** 3,173,244 Merrill Lynch Equity Index Trust* ** 4,444,205 Total collective trusts 7,617,449 MUTUAL FUNDS: PIMCO Total Return Fund ** 871,652 Federated International Income Fund ** 7,699 Van Kampen Worldwide High Income Fund ** 11,633 Oppenheimer U.S. Government Fund ** 58,392 Merrill Lynch Capital Fund* ** 714,639 Managers International Equity Fund ** 2,490,145 Oppenheimer Global Fund ** 917,744 Davis New York Venture Fund ** 1,588,978 Merrill Lynch Growth Fund* ** 2,103,703 Alliance Quasar Fund ** 144,400 Davis Convertible Securities Fund ** 83,339 Van Kampen Real Estate Securities Fund ** 29,741 Merrill Lynch Pacific Fund* ** 43,990 Munder Framlington Healthcare Fund ** 409,455 Oppenheimer Gold and Special Minerals Fund ** 34,049 State Street Research Global Resources Fund ** 14,339 Pioneer Europe Fund ** 116,086 Seligman Communications and Information Fund ** 1,087,928 Total mutual funds 10,727,912 COMMON STOCK: Black Hills Corporation Common Stock* ** 11,958,351 7

Current Description Cost value - ----------------------------------------------- -------- ----------- ADC Telecommunications Inc ** 5,437 AT&T Corp ** 17,250 Allnetsvcs Com Corp ** 73 America Online Inc ** 21,924 Apple Computer Inc ** 28,262 Avaya Inc ** 82 Charter Communications Inc ** 2,268 Cisco Systems Inc ** 5,737 Corning Inc ** 15,844 Compuware Corp ** 1,250 E Trade Group Inc ** 2,950 EMC Corporation ** 6,650 Echelon Corporation ** 9,637 Egghead.com Inc ** 335 Ericsn LM Tel ** 7,160 Exxon Mobil Corp ** 43,469 Ford Motor Co ** 35,156 Grey Wolf Inc ** 11,750 Global Marine Inc ** 14,187 Globalstar Telecom ** 90 Hollywood Media Corp ** 775 Intel Corp ** 19,540 Intl Business Mach ** 2,380 Intl Rectifier Corp ** 4,500 Knight Trading Group Inc ** 1,045 Ahold NV ** 9,847 Koninkligke Philips Electronics N.V. ** 10,875 LSI Logic Corp ** 1,367 Laser Vision Centers ** 487 Lucent Technologies Inc ** 18,900 Mkting Svcs Gp Inc ** 118 Medarex Inc ** 8,883 Micron Technology Inc ** 17,750 Navarre Corp ** 546 Nortel Networks Corp ** 6,412 Nokia Corp ** 13,050 Pfizer Inc ** 23,000 Philip Morris Cos Inc ** 22,000 Protein Ploymer Techs ** 27,484 RF Micro Devices Inc ** 1,371 Rite Aid Corp ** 1,187 Safeguard Scientifics ** 993 Southwest Airlines Co ** 10,662 Texas Instruments ** 7,106 Walmart Stores Inc ** 7,968 Worldcom Inc ** 4,780 ----------- Total common stock 12,410,888 PARTICIPANT LOANS, with interest rates ranging from 8.75 percent to 10.50 percent* ** 813,350 ----------- Total investments $31,615,328 =========== *Denotes party in interest. **Cost is not required for participant-directed accounts. 8

BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN (Employer identification number: 46-0111677) (Plan number: 003) Schedule G, Part III -- Nonexempt Transactions For the year ended December 31, 2000 Relationship to the Plan, employer Description of transactions, including Interest Identity of or other party in maturity date, rate of interest, collateral, Amount incurred party involved interest and par or maturity value loaned on loan - ----------------------- ------------------ ------------------------------------------- ------ -------- Black Hills Corporation Sponsor Lending of moneys from the Plan to the $27 $4 employer (contributions not timely remitted to the Plan), as follows: Deemed loan dated February 9, 1999, maturity June 14, 2000, deemed interest on the loan, 10 percent 9


                                                              EXHIBIT 23(b)


                   Consent of independent public accountants



As independent public accountants, we hereby consent to the incorporation of our
report dated June 1, 2001 included in this Form 11-K, into the Company's
previously filed Registration Statement (Form S-8 No. 333-61969).


Arthur Andersen



Minneapolis, Minnesota,
June 26, 2001