0001130464-04-000162 8-K 2 20040506 12 20040507 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 8-K 34 001-31303 04786554 625 9TH STREET PO BOX 1400 RAPID CITY SD 57709 6057212343 625 9TH STREET PO BOX 1400 RAPID SD 57709 BLACK HILLS HOLDING CORP 20001222 8-K 1 form8-k_may6.htm 1ST QTR 2004 10Q EARNINGS EX-99 2 ex99-form8k_1stqtr.htm 2004 1ST QTR RESULTS NEWS RELEASE