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, 1999 and 1998 Commission File Number 001-07978 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, 1999 and 1998 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 Statement of changes in net assets available for benefits 3 Notes to financial statements 4 Schedule of assets held for investment purposes 8 Schedule of 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, 1999 and 1998, and the related statement of changes in net assets available for benefits for the year ended December 31, 1999. These financial statements and the supplemental schedules 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, 1999 and 1998, and the changes in net assets available for benefits for the year ended December 31, 1999, in conformity with accounting principles generally accepted in the United States. Our audit was made 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. The 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, May 26, 2000 Black Hills Corporation Retirement Savings Plan Statement of net assets available for benefits As of December 31 1999 1998 ---- ---- INVESTMENTS, at market value (Note 2): Collective trusts $ 7,490,837 $ 6,360,968 Mutual funds 9,909,127 7,829,119 Employer common stock 5,668,478 7,210,038 Self-directed accounts 249,511 92,234 Other 69,360 PARTICIPANT LOANS 819,385 820,244 CONTRIBUTIONS RECEIVABLE: Participant contributions receivable 3,321 5,446 Participant contributions--loan payments in-transit 30,826 66,258 ----------- ----------- NET ASSETS AVAILABLE FOR BENEFITS $24,240,845 $22,384,307 =========== =========== The accompanying notes are an integral part of this statement. Black Hills Corporation Retirement Savings Plan Statement of changes in net assets available for benefits For the year ended December 31, 1999 NET ASSETS AVAILABLE FOR BENEFITS, beginning of year $22,384,307 ----------- INCREASES (DECREASES) DURING THE YEAR: Participant contributions 1,367,450 Investment interest and dividends 946,130 Net appreciation in market value of investments 1,053,592 Net realized loss on sale of investments (8,552) Interfund transfers, net - Administrative expenses (2,350) Other 12,632 Distributions to participants (1,512,364) ----------- Net increase (decrease) in net assets 1,856,538 ----------- NET ASSETS AVAILABLE FOR BENEFITS, end of year $24,240,845 =========== The accompanying notes are an integral part of this statement. BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN Notes to financial statements December 31, 1999 and 1998 1 Description of the Plan - ---------------------------- General The Black Hills Corporation Retirement Savings Plan (the Plan) is a defined contribution plan for eligible employees of Black Hills Power and Light Company, the assumed business name of the electric utility of Black Hills Corporation (the Company); Wyodak Resources Development Corp. (WRDC), a wholly owned subsidiary of the Company; Black Hills Exploration and Production, a wholly owned subsidiary of WRDC; and Black Hills Energy Resources, Inc., Varifuel, Inc., Black Hills FiberCom, Inc., Daksoft, Inc. and Black Hills Coal Network, Inc. (all wholly owned subsidiaries of Black Hills Capital Group, Inc., a wholly owned subsidiary of WRDC). The eligible employees may have a percentage of their compensation withheld and contributed to the Plan, subject to limitations, as defined. The Plan is designed to comply with the provisions of Section 401(k) of the Internal Revenue Code (the Code). The Company utilizes the Merrill Lynch special prototype defined contribution plan and 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. 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. Eligibility Employees are eligible to participate in the Plan on the first day of employment. Contributions The maximum percentage of compensation an employee may contribute to the Plan is 20 percent, with an annual maximum contribution of $10,000, as provided by the 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 described in Note 2. All participant contributions made and any earnings therefrom are fully vested to the participant at all times. Plan amendments Effective January 1, 2000, the Plan was amended to include a Company matching contribution, up to a maximum of 3 percent. The Company match will vest after five years of service, and the Company shall give credit for prior years of service. Rollover contributions The Plan received $41,544 in rollover transfers from other qualified plans in 1999, which are included in participant contributions on the statement of changes in net assets available for benefits. 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 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 1999, interest rates on outstanding participant loans ranged from 8.75 percent to 9.5 percent. Loans are prohibited for terminated employees. Amendments and termination The Company reserves the right to amend or terminate the Plan at any time. Upon termination of the Plan, 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. Investments The investment options of the Plan at December 31, 1999 consist of deposits in collective trusts of Merrill Lynch, mutual funds, common stock of the Company and self-directed accounts. Units (shares) of the various investment funds are valued daily at net asset value (which equals market value). The investment options are participant directed. Participants may change their investment elections daily. The investment options are grouped as follows: Collective trusts Merrill Lynch Retirement Preservation Trust--This trust seeks to provide preservation of capital liquidity and current income at levels that are typically higher than money market funds. The trust is a collective trust which invests primarily in guaranteed investment contracts (the investments are neither insured nor guaranteed by the United States government). Merrill Lynch Equity Index Trust--This trust seeks to provide investment results that, before expenses, replicate the total return of the Standard & Poor's 500 Composite Stock Price Index. The fund is a collective trust in which most of the assets will be comprised of all, or nearly all, of the 500 stocks in the index in weightings closely aligned with those of the index. Mutual funds PIMCO Total Return Fund--This fund seeks to provide maximum total return, consistent with preservation of capital and prudent investment management, and invests primarily in an intermediate-term portfolio of investment-grade bonds. Federated International Income Fund--This fund seeks to provide current income; capital growth is a secondary objective. The fund invests at least 65 percent of assets in high-quality, foreign currency-denominated debt securities. Van Kampen Worldwide High Income Fund (formerly the Morgan Stanley Worldwide High Income Fund)--This fund seeks to provide high current income consistent with relative stability of principal and potential for capital appreciation, and invests primarily in higher-yielding emerging market fixed-income securities of issues throughout the world. Oppenheimer U.S. Government Fund--This fund seeks current income and preservation of capital and normally invests at least 80 percent of assets in U.S. government securities and related repurchase agreements. Merrill Lynch Capital Fund--This fund seeks the highest total investment return consistent with product risk, primarily through a fully managed investment policy that permits management of the fund to vary investment in equity, debt and convertible securities based on its evaluation of changes in economic and market trends. The fund may invest up to 25 percent of its assets in foreign securities. Managers International Equity Fund--This fund seeks to achieve long-term capital appreciation through a diversified portfolio of equity securities of non-U.S. companies. The fund generally invests in companies having medium and large capitalizations. Oppenheimer Global Fund--This fund seeks capital appreciation by investing primarily in common stocks and convertible securities issued by U.S. and foreign companies. Davis New York Venture Fund--This fund seeks growth of capital by investing primarily in common stock of U.S. companies with market capitalizations of at least $5 billion. Merrill Lynch Growth Fund--This fund seeks growth of capital and, secondarily, income by investing in common stock, preferred stock and convertible securities. Alliance Quasar Fund--This fund seeks growth of capital by investing in equity securities that offer the possibility of above-average earnings growth and currently emphasizes investment in companies having small levels of capitalization. Davis Convertible Securities Fund--This fund seeks growth and income by investing in common and convertible stocks of U.S. companies. Van Kampen Real Estate Securities Fund--This fund seeks long-term growth of capital, with current income as a secondary objective, and invests primarily in securities of the real estate industry, including common stocks and real estate investment trusts. Merrill Lynch Pacific Fund--This fund seeks long-term capital appreciation and normally invests at least 80 percent of assets in equities issued by companies domiciled in far-eastern or western pacific countries. Munder Framlington Healthcare Fund--This fund seeks long-term capital appreciation by investing primarily in equity securities of issuers for whom at least 50 percent of sales, profits or net assets arise from health services or medical technology activities. Oppenheimer Gold and Special Minerals Fund--This fund seeks capital appreciation by normally investing between 80 percent and 100 percent of assets in mining securities and metals investments. State Street Research Global Resources Fund--This fund seeks to provide long-term growth of capital by normally investing at least 65 percent of total assets in securities of energy and natural resources companies, as well as utilities. The fund invests primarily in stocks, including foreign stocks. Pioneer Europe Fund--This fund seeks long-term growth of capital by investing primarily in equity securities of European issuers. Seligman Communications and Information Fund--This fund seeks capital appreciation by normally investing at least 80 percent of assets in common stocks issued by companies that operate in the communication, information and related industries. Black Hills Corporation common stock Participants may elect to invest a portion of their contributions in the Company's common stock. Self-directed accounts Participants may elect to invest a portion or all of their account in a self-directed brokerage account with Merrill Lynch. The self-directed account allows participants to purchase and hold investments that are not part of the Plan's regular investment menu. Investment options are subject to qualified plan restrictions as specified by the Code. Plan expenses Administrative fees of $17,100 were paid by the Company in 1999. 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. Recently issued accounting pronouncement In September 1999, the Accounting Standards Executive Committee issued Statement of Position 99-3, "Accounting for and Reporting of Certain Defined Contribution Plan Investments and Other Disclosure Matters," which eliminates the requirement for a defined contribution plan to report and disclose participant-directed investment programs. Accordingly, the 1998 financial statements have been reclassified to present information on a comparative basis. Investments The following presents investments that represent 5 percent or more of the Plan's net assets as of December 31: 1999 1998 ---- ---- Merrill Lynch Retirement Preservation Trust, 2,889,423 and 2,719,480 shares, respectively $2,889,423 $2,729,500 Merrill Lynch Equity Index Trust, 45,468 and 43,272 shares, respectively 4,601,414 3,631,468 Merrill Lynch Capital Fund, 33,415 and 34,842 shares, respectively 1,069,605 1,197,186 Managers International Equity Fund, 48,819 and 54,294 shares, respectively 2,865,676 2,652,256 Merrill Lynch Growth Fund, 103,659 and 115,330 shares, respectively 2,827,831 2,474,980 Black Hills Corporation common stock, 255,486 and 273,366 shares, respectively 5,668,478 7,210,038 3 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. Black Hills Corporation Retirement Savings Plan (Employer identification number: 46-0111677) (Plan number: 003) Schedule of assets held for investment purposes As of December 31, 1999 Number of shares units Description Cost** Market value - ------------- ---------------------------------------------- ----------- ------------ COLLECTIVE TRUSTS: 2,889,423 Merrill Lynch Retirement Preservation Trust $ 2,889,423 45,468 Merrill Lynch Equity Index Trust 4,601,414 ----------- ------------ Total collective trusts 7,490,837 ----------- ------------ MUTUAL FUNDS: 80,974 PIMCO Total Return Fund 801,648 161 Federated International Income Fund 1,543 516 Van Kampen Worldwide High Income Fund 5,339 5,140 Oppenheimer U.S. Government Fund 46,517 33,415 Merrill Lynch Capital Fund 1,069,605 48,819 Managers International Equity Fund 2,865,676 2,214 Oppenheimer Global Fund 138,491 30,485 Davis New York Venture Fund 876,758 103,659 Merrill Lynch Growth Fund 2,827,831 2,859 Alliance Quasar Fund 80,748 2,606 Davis Convertible Securities Fund 65,691 1,226 Van Kampen Real Estate Securities Fund 13,285 1,008 Merrill Lynch Pacific Fund 33,314 1,614 Munder Framlington Healthcare Fund 26,079 759 Oppenheimer Gold and Special Minerals Fund 7,942 701 State Street Research Global Resources Fund 7,993 2,717 Pioneer Europe Fund 103,148 19,842 Seligman Communications and Information Fund 937,519 ----------- ------------ Total mutual funds 9,909,127 255,486 BLACK HILLS CORPORATION COMMON STOCK* 5,668,478 SELF-DIRECTED ACCOUNTS 249,511 OTHER 69,360 PARTICIPANT LOANS 819,385 ----------- ------------ Total investments $24,206,698 =========== ============ *Denotes party in interest. **Cost is not required for participant-directed accounts. Black Hills Corporation Retirement Savings Plan (Employer identification number: 46-0111677) (Plan number: 003) Schedule of nonexempt transactions For the year ended December 31, 1999 Relationship to the Interest Identity of Plan, employer or Description of transactions, including maturity date, Amount incurred party involved other party in interest rate of interest, collateral, and par or maturity value loaned on loan - ----------------------- ----------------------- ------------------------------------------------------- ------ -------- Black Hills Corporation Sponsor Lending of moneys from the Plan to the employer (contributions not timely remitted to the Plan), as follows: $6,419 $1,496 Deemed loan dated March 15, 1998, maturity September 30, 1999, deemed interest on the loan, 14.6 percent Black Hills Corporation Sponsor Lending of moneys from the Plan to the employer (contributions not timely remitted to the Plan), as follows: 5,446 27 Deemed loan dated January 22, 1999, maturity February 9, 1999, deemed interest on the loan, 10 percent Black Hills Corporation Sponsor Lending of moneys from the Plan to the employer (contributions not timely remitted to the Plan), as follows: 27 4 Deemed loan dated February 9, 1999, maturity June 14, 2000, deemed interest on the loan, 10 percent CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report dated May 26, 2000 included in this Form 11-K, into the Company's previously filed Registration Statement (Form S-8 No. 333-61969). ARTHUR ANDERSEN LLP Minneapolis, Minnesota June 26, 2000