0000012400-09-000011 8-K 3 20091020 9.01 20091020 20091020 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 8-K 34 001-31303 091127840 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 bhc8k10-20_09.htm BHC 8K 10-20-09 EX-10.1 2 ensercocreditagr_3rdamend.htm ENSERCO CREDIT AGREEMENT EX-10.2 3 abnamrocreditagreement.htm ABN AMRO CREDIT AGREEMENT