Watson Cogeneration — Plant Summary
- EIA Plant ID
- 50216
- Capacity
- 405 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combined Cycle
- Status
- Operating
- Location
- Los Angeles, CA
- Operating Since
- 1987
- Generators
- 6
- Operator
- ARCO Products Co-Watson
- Parent Company
- —
- Annual Generation
- 2,334,449 MWh
- Capacity Factor
- 65.8%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Watson Cogeneration
OperatingNatural Gas
Ranked #33 of 306 Natural Gas plants in CA#544 of 2009 nationally
405 MW Natural Gas operating in Los Angeles, CA — California Independent System Operator
EIAWD
405 MW
Nameplate Capacity
6
Generators
units
Natural Gas Fired Combined Cycle
Technology
1987
Operating Since
Location
Coordinates
33.8166, -118.2444
County
Los Angeles, CA
Nearby Plants
- CPA Wilmington 1Solar1.8 MW · 0.7 km
- BP Carson RefineryNatural Gas13.5 MW · 0.8 km
- Centralia Battery Energy Storage SystemBESS200 MW · 2.2 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | ARCO Products Co-Watson | — | — |
| Owner(s) | Tesoro SoCal Cogen LLC | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Watson Cogeneration is a 405 MW natural gas-fired combined cycle power plant located in Los Angeles County, California. The plant began operating in 1987 and consists of 6 generators. As of the most recent data, the plant is owned and operated by ARCO Products Co-Watson. It ranks as the 33rd largest power plant in California out of 76, and 546th nationally out of 945.
The plant operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. The latest annual generation data shows an output of 2,334,449 MWh, resulting in a capacity factor of 65.8%.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
220 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
Industrial CHP
Generation
203.6K MWh
Latest Month
2.3M MWh
Annual Generation
65.8%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
CAISO
LMP Node
POD_ARCOGN_2_UNITS
Pricing Hub
TH_SP15_GEN-APND
Node Source
EIA-860 direct report
News & Articles (10)Beta
General
Wet compression of gas turbines gets a second wind
By Drew Robb. During the 1990's, some power plants experimented with fog-based power augmentation by overspraying fog into the compressor...
Power Engineering·11 months ago
General
Wet compression of gas turbines gets a second wind
By Drew Robb. During the 1990's, some power plants experimented with fog-based power augmentation by overspraying fog into the compressor...
Power Engineering·11 months ago
Industry·technology
Wet compression of gas turbines gets a second wind
By Drew Robb. During the 1990's, some power plants experimented with fog-based power augmentation by overspraying fog into the compressor...
Power Engineering·11 months ago
General
Wet compression of gas turbines gets a second wind
By Drew Robb. During the 1990's, some power plants experimented with fog-based power augmentation by overspraying fog into the compressor...
Power Engineering·11 months ago
Last updated 2026-03-26
View all 10 articles