Nameplate capacity
411 MW
Rank in Oregon
#12
of 301 plants
In service since
1967
October 1967
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Idaho Power Co
- County
- Wallowa County
- Generating units
- 3
- Share of state capacity
- 2.14%
- Rank among hydro plants in Oregon
- #5 of 63
- EIA plant code
- 3013
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 3 | Conventional Hydroelectric | 150 MW | 145 MW | 1967 | Operating |
| 1 | Conventional Hydroelectric | 131 MW | 151 MW | 1967 | Operating |
| 2 | Conventional Hydroelectric | 131 MW | 157 MW | 1967 | 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 Oregon
| Port Westward | Natural gas | 483 MW |
| Biglow Canyon Wind Farm | Wind | 450 MW |
| Round Butte | Hydro | 373 MW |
| Klondike Windpower III | Wind | 298 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 411 MW solar plant and a 411 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 Oregon power plants · What Oregon actually generates