Hydroelectric power plants in Montana
23 operating hydroelectric power plants in Montana with 2,545 MW of hydroelectric capacity, largest first. From EIA-860M, August 2026.
Largest hydroelectric power plants in Montana
| # | Plant | Hydroelectric MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | Noxon RapidsSanders County | 488 | 1,362 | 31.9% |
| 2 | Hungry HorseFlathead County | 428 | 633 | 16.9% |
| 3 | LibbyLincoln County | 420 | 1,608 | 35.0% |
| 4 | YellowtailBig Horn County | 278 | 566 | 23.2% |
| 5 | Selis Ksanka QlispeLake County | 228 | 971 | 48.6% |
| 6 | Fort PeckMcCone County | 162 | 757 | 48.1% |
| 7 | Thompson FallsSanders County | 91 | 440 | 51.2% |
| 8 | MoronyCascade County | 63 | 215 | 38.9% |
| 9 | CochraneCascade County | 59 | 215 | – |
| 10 | Rainbow (MT)Cascade County | 59 | 299 | 57.8% |
| 11 | Canyon FerryLewis and Clark County | 58 | 273 | – |
| 12 | RyanCascade County | 55 | 377 | 78.0% |
| 13 | HolterCascade County | 45 | 248 | 51.8% |
| 14 | Black EagleCascade County | 27 | 110 | 47.2% |
| 15 | HauserLewis and Clark County | 17 | 128 | – |
| 16 | Madison DamMadison County | 16 | 75.6 | 52.6% |
| 17 | Turnbull HydroTeton County | 13 | 18.0 | 15.8% |
| 18 | MysticStillwater County | 12 | 52.5 | 49.9% |
| 19 | Broadwater Power ProjectBroadwater County | 9.7 | 27.9 | 32.8% |
| 20 | Tiber Dam Hydroelectric PlantLiberty County | 7.5 | 31.2 | 47.4% |
| 21 | Big ForkFlathead County | 4.1 | 24.6 | 68.4% |
| 22 | South Dry Creek HydroCarbon County | 2.0 | 0.7 | 4.0% |
| 23 | Flint Creek Hydroelectric LLCGranite County | 2.0 | 9.0 | 51.2% |
Projects where hydroelectric is the largest fuel or at least a fifth of nameplate capacity. MW is hydroelectric nameplate only; net generation covers the whole project. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources