Largest power plants in Montana
The 50 largest power plants in Montana by nameplate capacity, from EIA-860M for August 2026, with 2025 net generation from EIA-923.
Top 50 by nameplate capacity
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | ColstripRosebud County · Coal | 1,647 | 9,171 | 63.6% |
| 2 | Noxon RapidsSanders County · Hydro | 488 | 1,362 | 31.9% |
| 3 | Hungry HorseFlathead County · Hydro | 428 | 633 | 16.9% |
| 4 | LibbyLincoln County · Hydro | 420 | 1,608 | 35.0% |
| 5 | Clearwater Wind IRosebud County · Wind | 366 | 1,329 | 41.5% |
| 6 | YellowtailBig Horn County · Hydro | 278 | 566 | 23.2% |
| 7 | Beaver Creek Wind FacilityStillwater County · Wind | 248 | 161* | – |
| 8 | Pryor Mountain WindCarbon County · Wind | 240 | 751 | 35.7% |
| 9 | Selis Ksanka QlispeLake County · Hydro | 228 | 971 | 48.6% |
| 10 | Clearwater Wind EastCuster County · Wind | 208 | 830 | 45.6% |
| 11 | Yellowstone County Generating StationYellowstone County · Natural gas | 207 | 383 | 21.1% |
| 12 | Dave Gates Generating StationDeer Lodge County · Natural gas | 203 | 503 | 28.3% |
| 13 | NaturEner Rim Rock EnergyToole County · Wind | 189 | 525 | 31.7% |
| 14 | Fort PeckMcCone County · Hydro | 162 | 757 | 48.1% |
| 15 | Judith Gap Wind Energy CenterWheatland County · Wind | 135 | 412 | 34.9% |
| 16 | Hardin Generator ProjectBig Horn County · Coal | 116 | 178 | 17.6% |
| 17 | Culbertson Generation StationRoosevelt County · Natural gas | 108 | 231 | 24.4% |
| 18 | NaturEner Glacier Wind Energy 1Toole County · Wind | 107 | 196 | 21.0% |
| 19 | NaturEner Glacier Wind Energy 2Toole County · Wind | 104 | 217 | 23.9% |
| 20 | Clearwater Wind IIRosebud County · Wind | 103 | 401 | 44.5% |
| 21 | Clearwater Wind IIIRosebud County · Wind | 100 | 377 | 43.0% |
| 22 | Thompson FallsSanders County · Hydro | 91 | 440 | 51.2% |
| 23 | Glendive GTDawson County · Natural gas | 84 | 15.9 | 2.2% |
| 24 | South Peak WindJudith Basin County · Wind | 80 | 243 | 34.7% |
| 25 | MTSUNYellowstone County · Solar | 80 | 149 | 21.3% |
| 26 | Apex SolarBeaverhead County · Solar | 80 | 165 | 23.5% |
| 27 | Stillwater Wind, LLCStillwater County · Wind | 80 | 253 | 36.2% |
| 28 | Yellowstone Energy LPYellowstone County · Petroleum coke | 68 | 458 | 76.9% |
| 29 | MoronyCascade County · Hydro | 63 | 215 | 38.9% |
| 30 | CochraneCascade County · Hydro | 59 | 215 | – |
| 31 | Rainbow (MT)Cascade County · Hydro | 59 | 299 | 57.8% |
| 32 | Canyon FerryLewis and Clark County · Hydro | 58 | 273 | – |
| 33 | RyanCascade County · Hydro | 55 | 377 | 78.0% |
| 34 | Basin Creek PlantSilver Bow County · Natural gas | 55 | 169 | 35.2% |
| 35 | Colstrip Energy LPRosebud County · Coal | 46 | 278 | 68.7% |
| 36 | HolterCascade County · Hydro | 45 | 248 | 51.8% |
| 37 | Spion Kop Wind FarmJudith Basin County · Wind | 40 | 97.7 | 27.9% |
| 38 | Diamond Willow Wind FacilityFallon County · Wind | 30 | 88.0 | 33.5% |
| 39 | OREG 1 IncRoosevelt County · Other fuels | 30 | 135 | 51.2% |
| 40 | OREG 2 IncRoosevelt County · Other fuels | 30 | 126 | 48.1% |
| 41 | Black EagleCascade County · Hydro | 27 | 110 | 47.2% |
| 42 | Greenfield Wind - MTTeton County · Wind | 25 | 78.6 | 35.9% |
| 43 | Big Timber Wind FarmSweet Grass County · Wind | 25 | 73.3 | 33.5% |
| 44 | Miles City GTCuster County · Natural gas | 23 | 2.4 | 1.2% |
| 45 | Lewis & ClarkRichland County · Natural gas | 19 | 10.4 | 6.4% |
| 46 | Gordon Butte Wind LLCMeagher County · Wind | 18 | 66.5 | 42.9% |
| 47 | HauserLewis and Clark County · Hydro | 17 | 128 | – |
| 48 | Madison DamMadison County · Hydro | 16 | 75.6 | 52.6% |
| 49 | Turnbull HydroTeton County · Hydro | 13 | 18.0 | 15.8% |
| 50 | MysticStillwater County · Hydro | 12 | 52.5 | 49.9% |
* Fewer than 12 months of 2025 reported, so the total is partial.
MW is the nameplate capacity of operating generators and batteries. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources