Power plants in Idaho
152 operating power projects with 6,594 MW of nameplate capacity, from EIA-860M for August 2026.
Projects
152
Nameplate capacity
6,594 MW
Counties with a plant
35
Operators
84
Capacity by fuel
Hydro · 2,596 MW · 74Natural gas · 1,227 MW · 9Wind · 1,132 MW · 33Solar · 827 MW · 14Battery storage · 659 MW · 10Other fuels · 154 MW · 12
MW is nameplate from operating generators and batteries. Plant counts use each project's primary fuel, so a coal and gas plant counts once.
Largest power plants in Idaho
Top 50 · All 152 plants| Plant | Primary fuel | MW | County | Operator |
|---|---|---|---|---|
| Brownlee | Hydro | 675 | Washington | Idaho Power Co |
| Dworshak | Hydro | 465 | Clearwater | USACE Northwestern Division |
| Langley Gulch Power Plant | Natural gas | 319 | Payette | Idaho Power Co |
| Rathdrum Power LLC | Natural gas | 302 | Kootenai | Rathdrum Power LLC |
| Cabinet Gorge | Hydro | 265 | Bonner | Avista Corp |
| Evander Andrews Power Complex | Natural gas | 225 | Elmore | Idaho Power Co |
| Matrix Pleasant Valley | Solar | 200 | Ada | Pleasant Valley Solar, LLC |
| Palisades Dam | Hydro | 176 | Bonneville | U S Bureau of Reclamation |
| Bennett Mountain | Natural gas | 173 | Elmore | Idaho Power Co |
| Rathdrum | Natural gas | 166 | Kootenai | Avista Corp |
Idaho power plants by fuel
Newest plants in Idaho
Ordered by the month the first generator began operating.
Boise Bench BESSBattery storage · 150 MW · Ada County · June 2026Pleasant Valley Solar 2 ProjectSolar · 125 MW · Ada County · April 2026IFP Peaking PlantNatural gas · 17.5 MW · Bonneville County · January 2026Happy Valley Battery StorageBattery storage · 82 MW · Canyon County · July 2025Kuna BESSBattery storage · 150 MW · Ada County · June 2025Raft River Geothermal Power PlantGeothermal · 16 MW · Cassia County · April 2025
Counties with the most capacity
Largest operators in Idaho
Idaho Power Co27 plants · 2,350 MW
USACE Northwestern Division2 plants · 507 MW
Avista Corp3 plants · 440 MW
Rathdrum Power LLC1 plant · 302 MW
U S Bureau of Reclamation5 plants · 258 MW
Grouped by EIA operator name. Parent companies are not merged.
All 152 plants in Idaho, by county
Ada County 13 plants
- Matrix Pleasant Valley Solar · 200 MW
- Kuna BESS Battery storage · 150 MW
- Boise Bench BESS Battery storage · 150 MW
- Pleasant Valley Solar 2 Project Solar · 125 MW
- Lucky Peak Power Plant Project Hydro · 101.2 MW
- ID Solar Solar · 40 MW
- Swan Falls Hydro · 27.2 MW
- Orchard Ranch Solar Solar · 20 MW
- Barber Dam Hydro · 4.1 MW
- Boise R Diversion Hydro · 3.3 MW
- Hidden Hollow Energy Landfill gas · 3.2 MW
- MC6 Hydro Facility Hydro · 2.3 MW
- Mora Drop Hydroelectric Project Hydro · 1.7 MW
Adams County 1 plant
- Tamarack Energy Wood biomass · 6.2 MW
Bannock County 3 plants
- Simplot Leasing Don Plant Other fuels · 15.9 MW
- Bannock County LFG to Energy Landfill gas · 3.2 MW
- Marsh Valley Development Hydro · 1.6 MW
Bingham County 1 plant
- Cedar Creek Wind, LLC Wind · 160 MW
Blaine County 1 plant
- Magic Dam Hydroelectric Project Hydro · 9 MW
Boise County 1 plant
- Horseshoe Bend Hydroelectric Co Hydro · 9.4 MW
Bonner County 2 plants
- Cabinet Gorge Hydro · 265.2 MW
- Albeni Falls Hydro · 42 MW
Bonneville County 11 plants
- Palisades Dam Hydro · 176.4 MW
- Goshen Phase II Wind · 124.5 MW
- Meadow Creek Project Company Wind · 119.7 MW
- Wolverine Creek Wind · 64.5 MW
- Horse Butte Wind I, LLC Wind · 57.6 MW
- Gem State Hydro · 23.4 MW
- IFP Peaking Plant Natural gas · 17.5 MW
- City Power Plant Hydro · 8 MW
- Upper Power Plant Hydro · 8 MW
- Lower No 1 Hydro · 8 MW
- Lower No 2 Hydro · 3 MW
Boundary County 2 plants
- Smith Falls Hydro Project Hydro · 38.1 MW
- Moyie Springs Hydro · 3.9 MW
Butte County 1 plant
- Dry Creek Project Hydro · 3.6 MW
Canyon County 4 plants
- Happy Valley Battery Storage Battery storage · 82 MW
- Amalgamated Sugar LLC Nampa Natural gas · 8.2 MW
- Melba BESS Battery storage · 2 MW
- Fargo Drop Hydro · 1.1 MW
Caribou County 3 plants
- Grace Hydro · 33 MW
- Soda Hydro · 14.6 MW
- Last Chance Hydro · 1.7 MW
Cassia County 6 plants
- Milner Hydro Hydro · 59.5 MW
- Burley Butte Windpark Wind · 21.3 MW
- Milner Dam Wind Park LLC Wind · 19.5 MW
- Raft River Geothermal Power Plant Geothermal · 16 MW
- Golden Valley Wind Park LLC Wind · 12 MW
- Milner Butte LFGE Landfill gas · 3.9 MW
Clark County 1 plant
- Birch Creek Power Hydro · 2.6 MW
Clearwater County 2 plants
- Dworshak Hydro · 465 MW
- Ford Hydro LP Hydro · 1.2 MW
Elmore County 20 plants
- Evander Andrews Power Complex Natural gas · 225 MW
- Bennett Mountain Natural gas · 172.8 MW
- Grand View Solar Two Solar · 80 MW
- Anderson Ranch Hydro · 40 MW
- Black Mesa BESS Battery storage · 40 MW
- Black Mesa Solar, LLC Solar · 40 MW
- Ryegrass Windfarm Wind · 23 MW
- Hammett Hill Windfarm Wind · 23 MW
- Mainline Windfarm Wind · 23 MW
- Desert Meadow Windfarm Wind · 23 MW
- Cold Springs Windfarm Wind · 23 MW
- Two Ponds Windfarm Wind · 23 MW
- Camp Reed Wind · 22.5 MW
- Sawtooth Wind Project Wind · 22.4 MW
- Mountain Home Wind · 21 MW
- Bennett Creek Windfarm LLC - Mountain Home Wind · 21 MW
- Mt. Home Solar 1, LLC Solar · 20 MW
- Simcoe Solar Solar · 20 MW
- Arrowrock Hydroelectric Project Hydro · 15 MW
- Elmore BESS Battery storage · 4 MW
Franklin County 2 plants
- Oneida Hydro · 30 MW
- Mink Creek Hydro Hydro · 3.1 MW
Fremont County 4 plants
- Falls River Hydro Hydro · 9 MW
- Ashton Hydro · 6.7 MW
- Island Park Hydro · 4.8 MW
- Chester Diversion Hydroelectric Project Hydro · 3.6 MW
Gem County 1 plant
- Black Canyon Hydro · 10.2 MW
Gooding County 13 plants
- Bliss (ID) Hydro · 75 MW
- Lower Salmon Hydro · 60 MW
- Lower Malad Hydro · 13.5 MW
- Fossil Gulch Wind · 10.5 MW
- Upper Malad Hydro · 8.3 MW
- Thousand Springs Hydro · 6.8 MW
- West Point RNG Biomass · 3.2 MW
- Clear Lake Hydro · 2.5 MW
- Cargill B6 Biofactory Biomass · 2.2 MW
- Big Sky Dairy Digester Biomass · 1.6 MW
- Koyle Ranch Hydroelectric Project Hydro · 1.3 MW
- Blind Canyon Hydro Hydro · 1.3 MW
- North Gooding Main Hydro Hydro · 1.3 MW
Idaho County 1 plant
- El Dorado Hydro Elk Creek Hydro · 2.6 MW
Jefferson County 1 plant
- Kettle Butte Digester, LLC Biomass · 1.8 MW
Jerome County 8 plants
- Shoshone Falls Hydro · 14.7 MW
- Bypass Hydro · 9.9 MW
- S E Hazelton A Hydro · 8.7 MW
- Wilson Lake Hydroelectric Project Hydro · 8.4 MW
- Hazelton B Hydro Hydro · 7.6 MW
- Mile 28 Water Power Project Hydro · 1.4 MW
- Marco Ranch Hydro · 1.2 MW
- Head of U Canal Hydro Project Hydro · 1.2 MW
Kootenai County 4 plants
- Rathdrum Power LLC Natural gas · 301.5 MW
- Rathdrum Natural gas · 166.4 MW
- Post Falls Hydro · 8.8 MW
- Fighting Creek LFGTE Plant Landfill gas · 3.2 MW
Lincoln County 3 plants
- Dietrich Drop Hydro · 4.8 MW
- AJMS, LLC Hydro · 1.2 MW
- GeoBon II Hydro · 1 MW
Madison County 1 plant
- BYUI Central Energy Facility Natural gas · 5.6 MW
Minidoka County 1 plant
- Minidoka Hydro · 27.7 MW
Nez Perce County 1 plant
- Clearwater Paper IPP Lewiston Wood biomass · 93.8 MW
Owyhee County 3 plants
- Hemmingway BESS Battery storage · 166 MW
- C J Strike Hydro · 82.8 MW
- Murphy Flat Solar Solar · 20 MW
Payette County 1 plant
- Langley Gulch Power Plant Natural gas · 318.5 MW
Power County 5 plants
- Rockland Wind Farm Wind · 79.2 MW
- Power County Wind Park South Wind · 22.5 MW
- Power County Wind Park North Wind · 22.5 MW
- American Falls Solar Solar · 20 MW
- American Falls Solar II Solar · 20 MW
Teton County 1 plant
- Felt Hydro · 7.4 MW
Twin Falls County 27 plants
- Jackpot Solar, LLC Solar · 120 MW
- Franklin Solar Hybrid Solar · 100 MW
- Franklin Battery Storage Battery storage · 60 MW
- Twin Falls (ID) Hydro · 52.7 MW
- High Mesa Wind · 40 MW
- Salmon Falls Wind Park Wind · 21 MW
- Payne's Ferry Wind · 21 MW
- Yahoo Creek Wind · 21 MW
- Cassia Gulch Wind · 18.9 MW
- Upper Salmon A Hydro · 18 MW
- Tuana Springs Wind · 16.8 MW
- Upper Salmon B Hydro · 16.5 MW
- Oregon Trail Wind Park Wind · 13.5 MW
- Thousand Springs Wind Park Wind · 12 MW
- Amalgamated Sugar Twin Falls Natural gas · 11.2 MW
- Pilgrim Stage Wind Park Wind · 10.5 MW
- Tuana Gulch Wind Park Wind · 10.5 MW
- Cassia Wind Wind · 8.4 MW
- South Forks Hydro Hydro · 8 MW
- Low Line Rapids Hydro · 2.8 MW
- Lateral 10 Ventures Hydro · 2.4 MW
- Crystal Springs Hydro · 2.3 MW
- Rock Creek I Hydro · 2.1 MW
- Filer BESS Battery storage · 2 MW
- Rock Creek II Hydro · 1.9 MW
- Clif Bar Bakery of Twin Falls Solar · 1.6 MW
- Little Mac Project Hydro · 1.5 MW
Valley County 1 plant
- Cascade Dam (ID) Hydro · 12.4 MW
Washington County 2 plants
- Brownlee Hydro · 675 MW
- Weiser BESS Battery storage · 3 MW
Questions about power plants in Idaho
How many power plants are in Idaho?
EIA-860M for August 2026 lists 152 operating power projects in Idaho, with 6,594 MW of nameplate capacity including batteries.
What is the largest power plant in Idaho?
Brownlee in Washington County, with 675 MW of nameplate capacity. The next largest is Dworshak, with 465 MW.
How much of Idaho's capacity is natural gas?
1,227 MW, about 19% of nameplate capacity. 9 projects have natural gas as their primary fuel.
Source: EIA-860M August 2026, published 2026-09-24. Page updated 2026-10-04. Data sources