Query
Marathon Bay Area Cogen
Type
Entity Briefing
Entity
Marathon Bay Area Cogen
State
AR
Generated
2026-10-18T00:02:59.736Z

Briefing on Marathon Bay Area Cogen

Entity Briefing
Generated Oct 18, 2026·Dataset freshness not reported
114 MW
Capacity
Operating
Current status
1987
Operating since
3
Generators
64.2%
Capacity factor
585 GWh
Annual generation
Briefing/plantOperating

Marathon Bay Area Cogen is a 114 MW Natural Gas Fired Combined Cycle asset in CAISO (California), currently Operating.

Marathon Bay Area Cogen is reported in California since 1987 under Tesoro Marketing & Refining Co. LLC (Martinez). Available operating and financial measures include 64.2% capacity factor and 585 GWh annual generation; $965/kW reported CapEx.

Location
Contra Costa, California
Technology
Natural Gas Fired Combined Cycle
Owner / parent
Tesoro Marketing & Refining Co. LLC (Martinez)
Operator
Tesoro Marketing & Refining Co. LLC (Martinez)
Grid
CAISO (California)
Plant ID
10342

What stands out

1

Marathon Bay Area Cogen is a 114 MW Natural Gas Fired Combined Cycle asset in California with status Operating.

2

Latest annual operating measures report 64.2% capacity factor and 585 GWh annual generation.

3

Available financial measures include $965/kW CapEx.

Market and operating context

ISO / market
CAISO (California)
Balancing authority
California Independent System Operator
NERC region
WECC
State rank
#75 of 303
National rank
#932 of 2,025

Why it matters

For this asset in CAISO (California), operating status, generation, ownership, and linked events are the primary facts for performance and asset-level diligence. The exact chart and source-linked records below let the reader test those facts before moving to a deeper report.