0001193125-03-002444 8-K 3 20030424 5 7 20030429 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 8-K 34 001-31303 03669950 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 d8k.htm FORM 8-K EX-1.1 3 dex11.htm UNDERWRITING AGREEMENT EX-5.1 4 dex51.htm OPINION OF STEVEN J. HELMERS