Major Facility Siting Program
- MFS Program Contacts
- DEQ Staff Directory
- Major Facility Siting Act
- ARM Title 17- Chapter 20
- MCA Title 75- Chapter 20
- Circular 1
- Circular 2
Mountain States Transmission Intertie (MSTI)
NorthWestern Energy (NorthWestern), 40 East Broadway, Butte, MT 59701, has submitted a Montana Major Facility Siting Act (MSFA) application to the Montana Department of Environmental Quality (DEQ) to construct a 500 kV electric transmission line. NorthWestern proposes to construct, operate, and maintain the line from Montana to Idaho. As proposed, the line would extend from a new substation approximately 5 miles south of Townsend, MT through the Whitehall and Butte areas to a enlarged Mill Creek substation east of Anaconda and then south along the Interstate 15 corridor in Montana to the Midpoint Substation in south central Idaho.

