Nameplate capacity
465 MW
Rank in Idaho
#2
of 155 plants
In service since
1974
September 1974
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- USACE Northwestern Division
- County
- Clearwater County
- Generating units
- 3
- Share of state capacity
- 7.07%
- Rank among hydro plants in Idaho
- #2 of 76
- EIA plant code
- 840
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 3 | Conventional Hydroelectric | 259 MW | 259 MW | 1974 | Operating |
| 1 | Conventional Hydroelectric | 103 MW | 103 MW | 1975 | Operating |
| 2 | Conventional Hydroelectric | 103 MW | 103 MW | 1975 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Idaho
| Brownlee | Hydro | 675 MW |
| Langley Gulch Power Plant | Natural gas | 319 MW |
| Rathdrum Power LLC | Natural gas | 302 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 465 MW solar plant and a 465 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Idaho power plants · What Idaho actually generates