Nameplate capacity
40 MW
Rank in Idaho
#34
of 155 plants
In service since
1950
December 1950
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- U S Bureau of Reclamation
- County
- Elmore County
- Generating units
- 2
- Share of state capacity
- 0.61%
- Rank among hydro plants in Idaho
- #13 of 76
- EIA plant code
- 6395
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 20 MW | 20 MW | 1950 | Operating |
| 2 | Conventional Hydroelectric | 20 MW | 20 MW | 1951 | 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
| Twin Falls (ID) | Hydro | 53 MW |
| Albeni Falls | Hydro | 42 MW |
| Black Mesa BESS | Battery storage | 40 MW |
| Black Mesa Solar, LLC | Solar | 40 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 40 MW solar plant and a 40 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