0001130464-08-000296 8-K 3 20080917 7.01 9.01 20080918 20080917 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 8-K 34 001-31303 081076978 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 form8k_9-08earningsguidance.htm FORM 8K EARNINGS GUIDANCE GRAPHIC 2 ballot.jpg GRAPHIC EX-99 3 ex99.htm EARNINGS GUIDANCE NEWS RELEASE