Tunnel 1 Power Project
Hydro power plant · Malheur County, Oregon
Nameplate capacity
8.5 MW
Rank in Oregon
#145
of 301 plants
In service since
1993
June 1993
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Owyhee Irrigation District
- County
- Malheur County
- Generating units
- 1
- Share of state capacity
- 0.04%
- Rank among hydro plants in Oregon
- #38 of 63
- EIA plant code
- 50362
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | 8.5 MW | 8.5 MW | 1993 | 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
| PaTu Wind Farm LLC | Wind | 9.0 MW |
| Medford Operation | Other | 8.5 MW |
| Pacific Canyon Windfarm LLC | Wind | 8.3 MW |
| BC Solar | Solar | 8.0 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 8.5 MW solar plant and a 8.5 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