Foster Wheeler Martinez
Contra Costa County, California · EIA plant ID 10342 · Operator: Tesoro Marketing & Refining Co. LLC (Martinez)
Nameplate114MWSummer 104 MW
Generators3in service
Net generation598GWh12 mo to Aug 2026
Capacity factor66%gas/coal/oil units, summer MW
Heat rate6,298Btu/kWhfossil units, electric fuel, HHV
First online1987Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 774 | — | — |
| 2002 | 837.1 | — | — |
| 2003 | 799.7 | 88.2% | 8,502 |
| 2004 | 776.8 | 85.5% | 8,502 |
| 2005 | 735.2 | 81.1% | 8,502 |
| 2006 | 675.4 | 74.5% | 8,502 |
| 2007 | 791.1 | 87.3% | 8,502 |
| 2008 | 808.9 | 89.0% | 8,266 |
| 2009 | 744.5 | 82.1% | 8,267 |
| 2011 | 809.5 | 89.3% | 8,265 |
| 2012 | 792.3 | 87.1% | 8,266 |
| 2013 | 739.9 | 81.6% | 8,403 |
| 2014 | 774.7 | 85.5% | 8,413 |
| 2015 | 742.4 | 81.9% | 8,417 |
| 2016 | 752.4 | 82.8% | 6,106 |
| 2017 | 742.4 | 81.9% | 6,137 |
| 2018 | 673.3 | 74.3% | 6,113 |
| 2019 | 691.8 | 76.3% | 6,117 |
| 2020 | 581.9 | 64.0% | 6,121 |
| 2021 | 519.9 | 57.4% | 6,144 |
| 2022 | 479.5 | 52.9% | 6,275 |
| 2023 | 624.2 | 68.8% | 6,244 |
| 2024 | 689.8 | 75.9% | 6,266 |
| 2025 | 585.1 | 64.5% | 6,288 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| TG1 | Natural Gas Fired Combined Cycle | CT | 40 | 35 | Feb 1987 | Operating | — | coming soon |
| TG2 | Natural Gas Fired Combined Cycle | CT | 40 | 35 | Feb 1987 | Operating | — | coming soon |
| TG3 | Natural Gas Fired Combined Cycle | CA | 33.5 | 33.5 | Feb 1987 | Operating | — | coming soon |
Owner / operator
Operator: Tesoro Marketing & Refining Co. LLC (Martinez). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Tesoro Refining and Marketing Co LLC | 100.0% | 114 MW |
Nearby plants
Within 80 km.
| Central San | 2 MW | 2.5 km |
| CCCSD Wastewater Treatment Plnt | 4 MW | 3.1 km |
| Martinez Refining | 100 MW | 4.7 km |
| Martinez Sulfuric Acid Regeneration Plt | 4 MW | 4.9 km |
| Valero Refinery Cogeneration Unit 1 | 50 MW | 9 km |
| Lake Herman | 5 MW | 10.9 km |