Watson Cogeneration
Natural gas power plant · Los Angeles County, California
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- ARCO Products Co-Watson
- County
- Los Angeles County
- Generating units
- 6
- Share of state capacity
- 0.38%
- Rank among natural gas plants in California
- #32 of 309
- EIA plant code
- 50216
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GN91 | Natural Gas Fired Combined Cycle | 82 MW | 82 MW | 1988 | Operating |
| GN92 | Natural Gas Fired Combined Cycle | 82 MW | 82 MW | 1988 | Operating |
| GN93 | Natural Gas Fired Combined Cycle | 82 MW | 82 MW | 1988 | Operating |
| GN94 | Natural Gas Fired Combined Cycle | 82 MW | 82 MW | 1987 | Operating |
| GN95 | Natural Gas Fired Combined Cycle | 39 MW | 35 MW | 1988 | Operating |
| GN96 | Natural Gas Fired Combined Cycle | 39 MW | 35 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
| Panoche Energy Center | Natural gas | 432 MW |
| W R Gianelli | Hydro | 424 MW |
| Kola Energy Center | Battery storage | 400 MW |
| Arica Solar | Solar | 399 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 405 MW solar plant and a 405 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