This permit is required for construction of any structure in, under, or over a federally listed navigable water of the United States, the excavation or deposition of material in such waters, or the accomplishment of any other work affecting the course, location, condition, or capacity of such waters. Navigable waters in Montana are the Missouri River downstream of Three Forks, the Yellowstone River downstream of Emigrant, and the Kootenai River from the Canadian border downstream to Jennings, Montana.
Contact: U.S. Army Corps of Engineers (USACE)
Montana Regulatory Office
10 West 15th Street, Suite 2200
Helena, Montana 59626
Phone: (406) 441-1375