EXHIBIT 24a BLACK HILLS CORPORATION Power of Attorney I, Adil M. Ameer, do hereby constitute and appoint Daniel P. Landguth my Attorney-in-Fact for the purpose of signing, in my name and in my behalf as a Director of Black Hills Corporation, the Form S-8 Registration Statement of Black Hills Corporation and to deliver in my behalf said Registration Statement for filing with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1933, as amended. Executed the 27th day of January, 2000. By: /s/ Adil M. Ameer EXHIBIT 24b BLACK HILLS CORPORATION Power of Attorney I, Bruce B. Brundage, do hereby constitute and appoint Daniel P. Landguth my Attorney-in-Fact for the purpose of signing, in my name and in my behalf as a Director of Black Hills Corporation, the Form S-8 Registration Statement of Black Hills Corporation and to deliver in my behalf said Registration Statement for filing with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1933, as amended. Executed the 27th day of January, 2000. By: /s/ Bruce B. Brundage EXHIBIT 24c BLACK HILLS CORPORATION Power of Attorney I, David C. Ebertz, do hereby constitute and appoint Daniel P. Landguth my Attorney-in-Fact for the purpose of signing, in my name and in my behalf as a Director of Black Hills Corporation, the Form S-8 Registration Statement of Black Hills Corporation and to deliver in my behalf said Registration Statement for filing with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1933, as amended. Executed the 27th day of January, 2000. By: /s/ David C.Ebertz EXHIBIT 24d BLACK HILLS CORPORATION Power of Attorney I, John R. Howard, do hereby constitute and appoint Daniel P. Landguth my Attorney-in-Fact for the purpose of signing, in my name and in my behalf as a Director of Black Hills Corporation, the Form S-8 Registration Statement of Black Hills Corporation and to deliver in my behalf said Registration Statement for filing with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1933, as amended. Executed the 27th day of January, 2000. By: /s/ John R. Howard EXHIBIT 24e BLACK HILLS CORPORATION Power of Attorney I, Everett E. Hoyt, do hereby constitute and appoint Daniel P. Landguth my Attorney-in-Fact for the purpose of signing, in my name and in my behalf as a Director of Black Hills Corporation, the Form S-8 Registration Statement of Black Hills Corporation and to deliver in my behalf said Registration Statement for filing with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1933, as amended. Executed the 27th day of January, 2000. By: /s/ Everett E. Hoyt EXHIBIT 24f BLACK HILLS CORPORATION Power of Attorney I, Kay S. Jorgensen, do hereby constitute and appoint Daniel P. Landguth my Attorney-in-Fact for the purpose of signing, in my name and in my behalf as a Director of Black Hills Corporation, the Form S-8 Registration Statement of Black Hills Corporation and to deliver in my behalf said Registration Statement for filing with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1933, as amended. Executed the 27th day of January, 2000. By: /s/ Kay S. Jorgensen EXHIBIT 24g BLACK HILLS CORPORATION Power of Attorney I, Thomas J. Zeller, do hereby constitute and appoint Daniel P. Landguth my Attorney-in-Fact for the purpose of signing, in my name and in my behalf as a Director of Black Hills Corporation, the Form S-8 Registration Statement of Black Hills Corporation and to deliver in my behalf said Registration Statement for filing with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1933, as amended. Executed the 27th day of January, 2000. By: /s/ Thomas J. Zeller