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Preliminary 2025 facility recordOperating

Martinez, CA · EIA plant 10342

Marathon Bay Area Cogen

Marathon Bay Area Cogen is a oil & gas power facility in Martinez, CA, with 114 MW of operating capacity.

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Operating capacity114 MW3 operating generators
Proposed capacity0 MW0 proposed generators
UtilityTesoro Marketing & Refining Co. LLC (Martinez)EIA-reported operator
Balancing authorityCISOCalifornia Independent System Operator

Capacity profile

Fuel and technology

Nameplate capacity
Operating
Oil & gas114 MW
ProposedNo proposed capacity reported
Reported technologiesNatural Gas Fired Combined Cycle

Nearby in CA

Related facilities

CA · 1.6 miCentral San2 MW →CA · 1.9 miCCCSD Wastewater Treatment Plnt4 MW →CA · 2.9 miMartinez Refining100 MW →CA · 3.0 miMartinez Sulfuric Acid Regeneration Plt4 MW →

Source quality

Preliminary facility data

This page uses the EIA-860 2025 Early Release. EIA identifies the release as preliminary, so it should not be used for official state or national aggregation. Capacity is nameplate capacity, not real-time output or annual generation.

Read methodologyEIA-860 source