Compare power plants

Registry, engineering, and operating metrics shown on a consistent EIA basis.

Metric	Watson Cogeneration Los Angeles County	Palomar Energy San Diego County
Capacity	405 MW	559 MW
Technology	Natural Gas Fired Combined Cycle	Natural Gas Fired Combined Cycle
Operator	ARCO Products Co-Watson	San Diego Gas & Electric Co
Operating units	6	3
Latest 12-month generation	2.38 TWh	1.18 TWh
Latest complete-year capacity factor	65.8% (2025)	30.0% (2025)
National technology rank	#326 of 538	#278 of 538
Latest EIA report	2026-06	2026-06

Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.

Compare power plants

Registry, engineering, and operating metrics shown on a consistent EIA basis.

Metric	Watson Cogeneration Los Angeles County	Palomar Energy San Diego County
Capacity	405 MW	559 MW
Technology	Natural Gas Fired Combined Cycle	Natural Gas Fired Combined Cycle
Operator	ARCO Products Co-Watson	San Diego Gas & Electric Co
Operating units	6	3
Latest 12-month generation	2.38 TWh	1.18 TWh
Latest complete-year capacity factor	65.8% (2025)	30.0% (2025)
National technology rank	#326 of 538	#278 of 538
Latest EIA report	2026-06	2026-06

Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.