Diamond Valley Lake
Hydro power plant · Riverside County, California
Nameplate capacity
30 MW
Rank in California
#571
of 1,897 plants
In service since
2001
May 2001
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Metropolitan Water District of S CA
- County
- Riverside County
- Generating units
- 9
- Share of state capacity
- 0.03%
- Rank among hydro plants in California
- #81 of 244
- EIA plant code
- 7942
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 10 | Conventional Hydroelectric | 3.3 MW | 3.3 MW | 2001 | Operating |
| 11 | Conventional Hydroelectric | 3.3 MW | 3.3 MW | 2001 | Operating |
| 12 | Conventional Hydroelectric | 3.3 MW | 3.3 MW | 2001 | Operating |
| 2 | Conventional Hydroelectric | 3.3 MW | 3.3 MW | 2001 | Operating |
| 3 | Conventional Hydroelectric | 3.3 MW | 3.3 MW | 2001 | Operating |
| 4 | Conventional Hydroelectric | 3.3 MW | 3.3 MW | 2001 | Operating |
| 6 | Conventional Hydroelectric | 3.3 MW | 3.3 MW | 2001 | Operating |
| 7 | Conventional Hydroelectric | 3.3 MW | 3.3 MW | 2001 | Operating |
| 8 | Conventional Hydroelectric | 3.3 MW | 3.3 MW | 2001 | 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
| Muck Valley Hydroelectric | Hydro | 30 MW |
| Tulloch | Hydro | 30 MW |
| CP Kelco San Diego Plant | Natural gas | 29 MW |
| Wadham Energy | Other | 29 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 30 MW solar plant and a 30 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