Power plants in Fremont County, Idaho
4 operating power plants in Fremont County, Idaho, with 24 MW of nameplate capacity, largest first. From EIA-860M, August 2026.
Largest power plants in Fremont County
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | Falls River HydroHydro | 9.0 | 43.2 | 54.8% |
| 2 | AshtonHydro | 6.7 | 28.0 | 47.7% |
| 3 | Island ParkHydro | 4.8 | 9.7 | 23.0% |
| 4 | Chester Diversion Hydroelectric ProjectHydro | 3.6 | 7.8 | 24.7% |
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
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