This permit is required for any person, agency, or entity proposing construction, industrial, or mining activity that will discharge stormwater to Montana waters and construction that will disturb more than one acre within 100 feet of streams, rivers, or lakes. Construction dewatering is also covered by MPDES permitting. For a full overview of the permit, download our printable version of all potential permits required, or contact the entity below.
Contact: Water Protection Bureau
Permitting and Compliance Division
Department of Environmental Quality
1520 E. Sixth Avenue, P.O. Box 200901
Helena, Montana 59620-0901
Phone: (406) 444-3080