0001130464-08-000200 11-K 2 20071231 20080627 20080627 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 11-K 34 001-31303 08922543 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-bhc_rsp.htm BHC RETIREMENT SAVINGS PLAN EX-23 2 ex23.htm DELOITTE & TOUCHE CONSENT