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405 MW Natural Gas operating in Los Angeles, CA
405 MW
Nameplate Capacity
6
Generators
units
Natural Gas Fired Combined Cycle
Technology
1987
Operating Since
Coordinates
33.8166, -118.2444
County
Los Angeles, CA
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | ARCO Products Co-Watson | — | — |
| Owner(s) | Tesoro SoCal Cogen LLC | — | — |
| Status | Operating | — | — |
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
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
California Independent System Operator (CISO)
Grid Voltage
220.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
Industrial CHP
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
203.6K MWh
Latest Month
2.3M MWh
Annual Generation
65.8%
Capacity Factor
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CO₂ Intensity
656 lb/MWh
NOx
1 lb/MWh
SO₂
0.003 lb/MWh
CH₄
0.017 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
65.7%
Annual Net Gen
2330 GWh
CO₂eq
656 lb/MWh
Subregion
WECC California
2013
$965/kW
Est. Construction Cost
Total estimated cost: $390.9M
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Market Position
ISO/RTO Market
CAISO
LMP Node
POD_ARCOGN_2_UNITS
Pricing Hub
TH_SP15_GEN-APND
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
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