0001169232-08-003467 8-K/A 5 20080714 9.01 20080929 20080929 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 8-K/A 34 001-31303 081092603 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/A 1 d74981_8ka.htm CURRENT REPORT EX-23.1 2 d74981_ex23-1.htm CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM EX-99.2 3 d74981_ex99-2.htm AUDITED COMBINED BALANCE SHEETS EX-99.3 4 d74981_ex99-3.htm UNAUDITED COMBINED BALANCE SHEET EX-99.4 5 d74981_ex99-4.htm UNAUDITED CONDENSED COMBINED PRO FORMA FINANCIAL STATEMENTS OF BLACK HILLS