Under National Pollutant Discharge Elimination System permit number MT0029424, the Sunlight Ranch Company, Little Horn Unit is authorized to discharge and must operate their facilities in accordance with effluent limitations, monitoring requirements, and other provisions set forth in the permit below. The facilities are located in Indian Country as defined at 18 U.S.C. 1151 on the Crow Reservation in section 10, Township 9 south, Range 34 East, 45.069005° north latitude and 107.528372° west longitude, southwest of Wyola, Montana off Little Horn Road.

• MT0029424 Sunlight Ranch Company Final NPDES Permit (PDF)(31 pp, 198 K, August 17, 2017)
• MT0029424 Sunlight Ranch Company Final NPDES Statement of Basis (PDF)(19 pp, 467 K, August 15, 2017)