0001130464-07-000330 8-K 2 20071214 5.03 9.01 20071217 20071214 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 8-K 34 001-31303 071308382 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 form8k121407.htm EX-3 2 ex3bylaws.htm