R C Kirkwood
Hydro power plant · Tuolumne County, California
Nameplate capacity
133 MW
Rank in California
#210
of 1,897 plants
In service since
1967
February 1967
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- City & County of San Francisco
- County
- Tuolumne County
- Generating units
- 3
- Share of state capacity
- 0.12%
- Rank among hydro plants in California
- #28 of 244
- EIA plant code
- 382
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 45 MW | 45 MW | 1967 | Operating |
| 2 | Conventional Hydroelectric | 45 MW | 44 MW | 1967 | Operating |
| 3 | Conventional Hydroelectric | 42 MW | 42 MW | 1987 | 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
| Ivanpah 3 | Solar | 133 MW |
| King City Power Plant | Natural gas | 133 MW |
| Maverick Solar 7, LLC | Solar | 132 MW |
| North Central Valley | Battery storage | 132 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 133 MW solar plant and a 133 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