San Dimas
Hydro power plant · Los Angeles County, California
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Metropolitan Water District of S CA
- County
- Los Angeles County
- Generating units
- 1
- Share of state capacity
- 0.01%
- Rank among hydro plants in California
- #125 of 244
- EIA plant code
- 6646
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 9.9 MW | 9.9 MW | 1981 | 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
| West Gates Solar Station | Solar | 10 MW |
| Western Antelope Dry Ranch | Solar | 10 MW |
| Blacksand Generating Facility | Natural gas | 9.6 MW |
| Solar Star California, XLIV, LLC | Solar | 9.5 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 9.9 MW solar plant and a 9.9 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