Colstrip, Montana Personal Loan for Bad Credit Companies Ener G Comm Federal Credit Union421 Willow AvenueColstrip, MT 59323(406) 748-2324Hours: M-F 9am-5pm, S-Sn Closed First Interstate Bank6210 Main StreetColstrip, MT 59323(406) 748-2840Hours: M-Th 9am-4pm, F 9am-5pm, S-Sn Closed