0001130464-08-000151 8-K 3 20080430 2.02 9.01 20080501 20080430 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 8-K 34 001-31303 08791635 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_1stqtr2008.htm FORM 8K 1ST QTR 2008 GRAPHIC 2 ballot.jpg GRAPHIC EX-99 3 ex-99.htm BHC 1ST QTR EARNINGS RELEASE