0001130464-07-000310 8-K 4 20071130 8.01 9.01 20071203 20071203 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 8-K 34 001-31303 071280570 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 form8kclfp_rateapproval.htm FORM 8K CLFP RATE APPROVAL GRAPHIC 2 ballot.jpg GRAPHIC EX-99 3 ex99.htm NEWS RELEASE GRAPHIC 4 img2.gif GRAPHIC