113.5 MW Natural Gas operating in Contra Costa, CA — California Independent System Operator
113.5 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combined Cycle
Technology
1987
Operating Since
Coordinates
38.0244, -122.0589
County
Contra Costa, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Tesoro Marketing & Refining Co. LLC (Martinez) | — | — |
| Owner(s) | Tesoro Refining and Marketing Co LLC | — | — |
| Status | Operating | — | — |
Marathon Bay Area Cogen is a natural gas-fired combined cycle power plant located in Contra Costa County, California. The plant has a total capacity of 113.5 MW distributed across three generators. It began operating in 1987 and is owned and operated by Tesoro Marketing & Refining Co. LLC (Martinez). The plant operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year with available data, Marathon Bay Area Cogen generated 585,121 MWh of electricity, achieving a capacity factor of 64.2%. In terms of size, the plant ranks 72nd out of 76 power plants in California and 907th out of 945 plants nationally.
Generated from EIA, GEM, and public data sources
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
230 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP CHP
56.3K MWh
Latest Month
585.1K MWh
Annual Generation
64.2%
Capacity Factor
No financial data available for this plant.
Market Position
ISO/RTO Market
CAISO
LMP Node
FOSTERW_7_N004
Pricing Hub
TH_NP15_GEN-APND
Location Type
Pricing Node
Node Source
EIA-860 direct report