Collierville Powerhouse
Hydro power plant · Calaveras County, California
Nameplate capacity
253 MW
Rank in California
#96
of 1,897 plants
In service since
1989
November 1989
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Northern California Power Agny
- County
- Calaveras County
- Generating units
- 2
- Share of state capacity
- 0.23%
- Rank among hydro plants in California
- #10 of 244
- EIA plant code
- 54555
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | 127 MW | 127 MW | 1989 | Operating |
| GEN2 | Conventional Hydroelectric | 127 MW | 127 MW | 1989 | 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 California
| Rosamond South 1 | Solar | 257 MW |
| AV Solar Ranch One | Solar | 253 MW |
| Mount Signal Solar Farm V | Solar | 252 MW |
| Long Beach Generation | Natural gas | 252 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 253 MW solar plant and a 253 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 California power plants · What California actually generates