Martinez Refining
Contra Costa County, California · EIA plant ID 54912 · Operator: Martinez Refining Co
Nameplate100MWSummer 100 MW
Generators3in service
Net generation658GWh12 mo to Aug 2026
Capacity factor75%gas/coal/oil units, summer MW
Heat rate6,710Btu/kWhfossil units, electric fuel, HHV
First online1995Runs 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 | 717.6 | — | — |
| 2002 | 771.8 | — | — |
| 2003 | 836.4 | 106.1% | 6,169 |
| 2004 | 793.8 | 100.4% | 7,902 |
| 2005 | 729.4 | 92.5% | 8,173 |
| 2006 | 731 | 92.7% | 5,522 |
| 2007 | 769.3 | 97.6% | 5,451 |
| 2008 | 731.3 | 92.5% | 5,462 |
| 2009 | 769.8 | 97.6% | 5,456 |
| 2010 | 789.9 | 100.2% | 5,465 |
| 2011 | 786.1 | 99.7% | 5,529 |
| 2012 | 806.9 | 102.1% | 5,451 |
| 2013 | 810.5 | 102.8% | 5,440 |
| 2014 | 705.9 | 89.5% | 5,464 |
| 2015 | 830.6 | 105.4% | 5,456 |
| 2016 | 826.2 | 94.1% | 6,684 |
| 2017 | 785.6 | 89.7% | 6,671 |
| 2018 | 810.8 | 92.6% | 6,669 |
| 2019 | 827.5 | 94.5% | 6,689 |
| 2020 | 704.9 | 80.2% | 6,706 |
| 2021 | 765.3 | 87.4% | 6,698 |
| 2022 | 776.8 | 88.7% | 6,699 |
| 2023 | 731.5 | 83.5% | 6,701 |
| 2024 | 743.6 | 84.7% | 6,698 |
| 2025 | 734 | 83.8% | 6,709 |
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 |
|---|---|---|---|---|---|---|---|---|
| GTG1 | Natural Gas Fired Combined Cycle | CT | 40 | 40 | Nov 1995 | Operating | — | coming soon |
| GTG2 | Natural Gas Fired Combined Cycle | CT | 40 | 40 | Jan 1996 | Operating | — | coming soon |
| STG1 | Other Gases | CA | 20 | 20 | Dec 1995 | Operating | — | coming soon |
Owner / operator
Operator: Martinez Refining Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Martinez Refining Co | 100.0% | 100 MW |
Nearby plants
Within 80 km.
| Martinez Sulfuric Acid Regeneration Plt | 4 MW | 1.6 km |
| Central San | 2 MW | 3.5 km |
| CCCSD Wastewater Treatment Plnt | 4 MW | 4.2 km |
| Foster Wheeler Martinez | 114 MW | 4.7 km |
| Valero Refinery Cogeneration Unit 1 | 50 MW | 6.8 km |
| Lake Herman | 5 MW | 9.3 km |