0001130464-09-000292 4 1 20091130 20091202 20091202 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 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 NEWLIN STEPHEN D 0001229313 4 34 001-31303 091217006 22 W FRONTAGE ROAD NORTHFIELD IL 60093 4 1 primary_doc.xml PRIMARY DOCUMENT