Welcome to the NorthWestern Energy website. Please choose a state/region below so we can deliver you the most personalized and relevant site experience possible.
Be prepared, stay safe! Extreme wind event forecasted across our service area this week.
The U.S. Weather Service is forecasting extreme winds this week.
Our crews are prepared with additional staffing, equipment, and supplies to respond as quickly as possible, safely, to weather‑related outages.
It’s critical to stay away from downed or low‑hanging power lines. If you see a damaged or fallen line, keep your distance and report it immediately. Never touch a power line or anything in contact with it, including trees. Keep people, pets, equipment, and objects at least 30 feet away, and never attempt to remove a fallen tree or branch from a power line.
For the latest weather alerts and forecasts, visit the South Dakota National Weather Service sites at Sioux Falls, SD and Aberdeen, SD.
Be prepared, stay safe! Extreme wind forecast across Montana this week
The U.S. Weather Service is forecasting extreme winds Wednesday evening and into Thursday.
Our crews are prepared with additional staffing, equipment, and supplies to respond as quickly as possible, safely, to weather‑related outages.
It’s critical to stay away from downed or low‑hanging power lines. If you see a damaged or fallen line, keep your distance and report it immediately. Never touch a power line or anything in contact with it, including trees. Keep people, pets, equipment, and objects at least 30 feet away, and never attempt to remove a fallen tree or branch from a power line.
Welcome to the Missouri-Madison Project 2188 Coordination Site.
NorthWestern Energy owns and operates two dams (Hebgen & Madison) on the Madison River and seven dams (Hauser, Holter, Black Eagle, Rainbow, Cochrane, Rainbow, & Morony) on the Missouri River. NorthWestern is authorized to operate all nine facilities by the Project 2188 license issued by The Federal Energy Regulatory Commission (FERC) in September 2000. The FERC license specifies conditions for operation and maintenance of the project including conditions to protect environmental resources.
The purpose of this site is to provide information on NorthWestern Energy’s ongoing resource stewardship programs implemented in the 525-mile river corridor from West Yellowstone to Fort Peck Reservoir.
Water Quality
We developed a water quality and biological monitoring program for the Missouri and Madison Rivers to identify long-term trends and to evaluate the effects of operation and maintenance of the hydroelectric facilities on these rivers.
NorthWestern Energy operates Hebgen and Madison dams on the Madison River and works diligently with individuals and agencies to protect, mitigate and enhance fisheries, wildlife, water quality and recreation in the Madison River drainage to offset any effects of dam operations.
NorthWestern Energy owns and operates two dams on the Madison River and seven dams on the Missouri River. Find information on our ongoing stewardship programs implemented in the 525-mile river corridor from West Yellowstone to Fort Peck Reservoir.