Largest power plants in Idaho
The 50 largest power plants in Idaho by nameplate capacity, from EIA-860M for August 2026, with 2025 net generation from EIA-923.
Plants
50
Nameplate capacity
5,689 MW
Net generation, 2025
17.3 TWh
48 of 50 plants reported
Top 50 by nameplate capacity
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | BrownleeWashington County · Hydro | 675 | 2,256 | 38.1% |
| 2 | DworshakClearwater County · Hydro | 465 | 1,517 | 37.2% |
| 3 | Langley Gulch Power PlantPayette County · Natural gas | 319 | 1,755 | 62.9% |
| 4 | Rathdrum Power LLCKootenai County · Natural gas | 302 | 1,715 | 64.9% |
| 5 | Cabinet GorgeBonner County · Hydro | 265 | 886 | 38.2% |
| 6 | Evander Andrews Power ComplexElmore County · Natural gas | 225 | 926 | 39.0% |
| 7 | Matrix Pleasant ValleyAda County · Solar | 200 | 460* | – |
| 8 | Palisades DamBonneville County · Hydro | 176 | 657 | 42.5% |
| 9 | Bennett MountainElmore County · Natural gas | 173 | 999 | 66.0% |
| 10 | RathdrumKootenai County · Natural gas | 166 | 793 | 54.4% |
| 11 | Hemmingway BESSOwyhee County · Battery storage | 166 | −6.5* | – |
| 12 | Cedar Creek Wind, LLCBingham County · Wind | 160 | 455 | 32.5% |
| 13 | Kuna BESSAda County · Battery storage | 150 | −13.9* | – |
| 14 | Boise Bench BESSAda County · Battery storage | 150 | – | – |
| 15 | Pleasant Valley Solar 2 ProjectAda County · Solar | 125 | – | – |
| 16 | Goshen Phase IIBonneville County · Wind | 125 | 337 | 30.9% |
| 17 | Jackpot Solar, LLCTwin Falls County · Solar | 120 | 275 | 26.1% |
| 18 | Meadow Creek Project CompanyBonneville County · Wind | 120 | 292 | 27.9% |
| 19 | Lucky Peak Power Plant ProjectAda County · Hydro | 101 | 311 | 35.1% |
| 20 | Franklin Solar HybridTwin Falls County · Solar | 100 | 252 | 28.8% |
| 21 | Clearwater Paper IPP LewistonNez Perce County · Wood biomass | 94 | 463 | 46.4% |
| 22 | C J StrikeOwyhee County · Hydro | 83 | 364 | 50.2% |
| 23 | Happy Valley Battery StorageCanyon County · Battery storage | 82 | −6.8* | – |
| 24 | Grand View Solar TwoElmore County · Solar | 80 | 184 | 26.2% |
| 25 | Rockland Wind FarmPower County · Wind | 79 | 219 | 31.6% |
| 26 | Bliss (ID)Gooding County · Hydro | 75 | 298 | 45.3% |
| 27 | Wolverine CreekBonneville County · Wind | 65 | 144 | 25.4% |
| 28 | Lower SalmonGooding County · Hydro | 60 | 197 | 37.4% |
| 29 | Franklin Battery StorageTwin Falls County · Battery storage | 60 | −9.0 | – |
| 30 | Milner HydroCassia County · Hydro | 60 | 33.7 | 6.5% |
| 31 | Horse Butte Wind I, LLCBonneville County · Wind | 58 | 158 | 31.3% |
| 32 | Twin Falls (ID)Twin Falls County · Hydro | 53 | 43.5 | 9.4% |
| 33 | Albeni FallsBonner County · Hydro | 42 | 177 | 48.1% |
| 34 | Anderson RanchElmore County · Hydro | 40 | 85.8 | 24.5% |
| 35 | High MesaTwin Falls County · Wind | 40 | 76.4 | 21.8% |
| 36 | ID SolarAda County · Solar | 40 | 92.2 | 26.3% |
| 37 | Black Mesa BESSElmore County · Battery storage | 40 | −3.2* | – |
| 38 | Black Mesa Solar, LLCElmore County · Solar | 40 | 89.2 | 25.4% |
| 39 | Smith Falls Hydro ProjectBoundary County · Hydro | 38 | 87.2 | 26.1% |
| 40 | GraceCaribou County · Hydro | 33 | 82.7 | 28.6% |
| 41 | OneidaFranklin County · Hydro | 30 | 39.4 | 15.0% |
| 42 | MinidokaMinidoka County · Hydro | 28 | 98.8 | 40.7% |
| 43 | Swan FallsAda County · Hydro | 27 | 110 | 46.2% |
| 44 | Gem StateBonneville County · Hydro | 23 | 117 | 57.2% |
| 45 | Ryegrass WindfarmElmore County · Wind | 23 | 48.7 | 24.2% |
| 46 | Hammett Hill WindfarmElmore County · Wind | 23 | 53.1 | 26.3% |
| 47 | Mainline WindfarmElmore County · Wind | 23 | 52.2 | 25.9% |
| 48 | Desert Meadow WindfarmElmore County · Wind | 23 | 54.3 | 26.9% |
| 49 | Cold Springs WindfarmElmore County · Wind | 23 | 46.6 | 23.1% |
| 50 | Two Ponds WindfarmElmore County · Wind | 23 | 55.2 | 27.4% |
* 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