0001130464-09-000191 11-K 2 20081231 20090629 20090629 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 11-K 34 001-31303 09916174 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_bhc6-09.htm BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN EX-23 2 bhc_consent.htm BHC CONSENT- DELOITE & TOUCHE LLP