Explore the largest hydro power plants in Montana and see all the utility-scale hydro projects in Montana on a map.
Last updated: May 2026
On this page, you can explore our real-time database of hydro power plants in Montana. Each month, we track hydro projects and update our list of the largest hydro power plants in Montana.
As of May 2026, there are 23 utility-scale hydro power plants in Montana, according to Cleanview's project tracker. Their total operating capacity is 2,681 MW. In 2025, there was 1 hydro power plant built in Montana.
Total Hydro Power Plants
23
Total Capacity
2,681 MW
Built in 2025
1
Map of hydro power plants in Montana. Marker size reflects capacity — only facilities with reported capacity data are shown.
525 MW
Year Operational: September 1984
Location: Lincoln, Montana
488 MW
Year Operational: December 1977
Location: Sanders, Montana
428 MW
Year Operational: July 1953
Location: Flathead, Montana
278 MW
Year Operational: November 1966
Location: Big Horn, Montana
228 MW
Year Operational: November 1954
Location: Lake, Montana
180 MW
Year Operational: June 1961
Location: McCone, Montana
98 MW
Year Operational: July 1917
Location: Sanders, Montana
63 MW
Year Operational: January 1930
Location: Cascade, Montana
59 MW
Year Operational: July 1958
Location: Cascade, Montana
17 MW
Year Operational: July 2025
Location: Lewis and Clark, Montana
16 MW
Year Operational: March 2022
Location: Madison, Montana
59 MW
Year Operational: March 2013
Location: Cascade, Montana
2 MW
Year Operational: March 2013
Location: Granite, Montana
13 MW
Year Operational: July 2011
Location: Teton, Montana
8 MW
Year Operational: June 2004
Location: Liberty, Montana
10 MW
Year Operational: June 1989
Location: Broadwater, Montana
2 MW
Year Operational: September 1985
Location: Carbon, Montana
525 MW
Year Operational: September 1984
Location: Lincoln, Montana
Cleanview