Idaho Power plants
Every generating plant EIA-860M files against Idaho Power for 2026-07: 31 plants, 3 GW of nameplate capacity, across 2 states and 4 energy sources.
EIA files this entity as “Idaho Power Co”.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Plants
- 31
- Nameplate capacity
- 3 GW
- States
- 2
- ID, OR
- Energy sources
- 4
Idaho Power plants by energy source
- Battery9 plants · 509 MW
- Hydro18 plants · 1,818 MW
- Natural gas3 plants · 762 MW
- Petroleum1 plants · 5 MW
Full list of Idaho Power plants
| BrownleeConventional Hydroelectric | Idaho Power Co | Washington | 675 | 5 | 1958 | Operating |
| Hells CanyonConventional Hydroelectric | Idaho Power Co | Wallowa | 411.1 | 3 | 1967 | Operating |
| Langley Gulch Power PlantNatural Gas Fired Combined Cycle | Idaho Power Co | Payette | 318.5 | 2 | 2012 | Operating |
| Evander Andrews Power ComplexNatural Gas Fired Combustion Turbine | Idaho Power Co | Elmore | 270.9 | 3 | 2001 | Operating |
| Oxbow (OR)Conventional Hydroelectric | Idaho Power Co | Baker | 190 | 4 | 1961 | Operating |
| Bennett MountainNatural Gas Fired Combustion Turbine | Idaho Power Co | Elmore | 172.8 | 1 | 2005 | Operating |
| Hemmingway BESSBatteries | Idaho Power Co | Owyhee | 166 | 3 | 2025 | Operating |
| Boise Bench BESSBatteries | Idaho Power Co | Ada | 150 | 1 | 2026 | Operating |
| American FallsConventional Hydroelectric | Idaho Power Co | Power | 92.4 | 3 | 1978 | Standby/Backup |
| C J StrikeConventional Hydroelectric | Idaho Power Co | Owyhee | 82.8 | 3 | 1952 | Operating |
| Happy Valley Battery StorageBatteries | Idaho Power Co | Canyon | 82 | 1 | 2025 | Operating |
| Bliss (ID)Conventional Hydroelectric | Idaho Power Co | Gooding | 75 | 3 | 1949 | Operating |
| Lower SalmonConventional Hydroelectric | Idaho Power Co | Gooding | 60 | 4 | 1949 | Operating |
| Franklin Battery StorageBatteries | Idaho Power Co | Twin Falls | 60 | 1 | 2025 | Operating |
| Milner HydroConventional Hydroelectric | Idaho Power Co | Cassia | 59.5 | 3 | 1992 | Operating |
| Twin Falls (ID)Conventional Hydroelectric | Idaho Power Co | Twin Falls | 52.7 | 2 | 1935 | Operating |
| Black Mesa BESSBatteries | Idaho Power Co | Elmore | 40 | 1 | 2024 | Operating |
| Swan FallsConventional Hydroelectric | Idaho Power Co | Ada | 27.2 | 2 | 1994 | Operating |
| Upper Salmon AConventional Hydroelectric | Idaho Power Co | Twin Falls | 18 | 2 | 1937 | Operating |
| Upper Salmon BConventional Hydroelectric | Idaho Power Co | Twin Falls | 16.5 | 2 | 1947 | Operating |
| Shoshone FallsConventional Hydroelectric | Idaho Power Co | Jerome | 14.7 | 2 | 1921 | Operating |
| Lower MaladConventional Hydroelectric | Idaho Power Co | Gooding | 13.5 | 1 | 1948 | Operating |
| Cascade Dam (ID)Conventional Hydroelectric | Idaho Power Co | Valley | 12.4 | 2 | 1983 | Operating |
| Upper MaladConventional Hydroelectric | Idaho Power Co | Gooding | 8.3 | 1 | 1948 | Operating |
| Thousand SpringsConventional Hydroelectric | Idaho Power Co | Gooding | 6.8 | 1 | 1920 | Operating |
| Salmon DieselPetroleum Liquids | Idaho Power Co | Lemhi | 5 | 2 | 1967 | Standby/Backup |
| Elmore BESSBatteries | Idaho Power Co | Elmore | 4 | 1 | 2025 | Operating |
| Weiser BESSBatteries | Idaho Power Co | Washington | 3 | 1 | 2025 | Operating |
| Clear LakeConventional Hydroelectric | Idaho Power Co | Gooding | 2.5 | 1 | 1937 | Operating |
| Filer BESSBatteries | Idaho Power Co | Twin Falls | 2 | 1 | 2025 | Operating |
| Melba BESSBatteries | Idaho Power Co | Canyon | 2 | 1 | 2025 | Operating |
Idaho Power: FAQ
- How many power plants does Idaho Power operate?
- EIA-860M lists 31 operating plants against “Idaho Power Co” for 2026-07, totalling 3 GW of nameplate capacity in 2 states.
- Is Idaho Power the owner of these plants?
- EIA-860M names one reporting entity per generator. That entity operates the plant on the survey; ownership can sit with a parent, a partnership or a tax-equity structure that the form does not record.
- Why are affiliates listed separately?
- Because EIA files them separately. Rolling subsidiaries into a parent would need an ownership map EIA-860M does not publish, so this page does not invent one.