0001130464-05-000279 11-K 2 20041231 20050628 20050628 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 11-K 34 001-31303 05919471 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 11-K 1 form11k_401k.htm BHC FORM 11-K FOR 401-K 12-31-04 EX-23 2 ex23.htm EX 23