Los Medanos Energy Center
Contra Costa County, California · EIA plant ID 55217 · Operator: Los Medanos Energy Center LLC
Nameplate678MWSummer 559 MW
Generators3in service
Net generation2,628GWh12 mo to Aug 2026
Capacity factor54%gas/coal/oil units, summer MW
Heat rate6,724Btu/kWhfossil units, electric fuel, HHV
First online2001Runs 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) |
|---|---|---|---|
| 2002 | 3,611.4 | — | — |
| 2003 | 3,255.8 | 65.5% | 6,778 |
| 2004 | 3,690.6 | 74.1% | 6,517 |
| 2005 | 3,594.6 | 72.4% | 6,656 |
| 2006 | 2,935.7 | 59.1% | 6,656 |
| 2007 | 3,476.9 | 70.0% | 6,656 |
| 2008 | 3,065 | 61.5% | 6,656 |
| 2009 | 3,358.2 | 67.6% | 6,656 |
| 2010 | 3,290.9 | 66.3% | 6,656 |
| 2011 | 2,677.8 | 53.9% | 6,587 |
| 2012 | 3,594.4 | 72.2% | 6,586 |
| 2013 | 3,524.9 | 71.0% | 6,605 |
| 2014 | 3,540.6 | 71.3% | 6,601 |
| 2015 | 2,603.6 | 52.4% | 6,578 |
| 2016 | 2,852.5 | 57.3% | 6,788 |
| 2017 | 3,205.6 | 64.5% | 6,679 |
| 2018 | 3,274.7 | 65.9% | 6,669 |
| 2019 | 2,707.1 | 54.5% | 6,675 |
| 2020 | 2,976 | 59.8% | 6,684 |
| 2021 | 3,329.1 | 67.0% | 6,669 |
| 2022 | 3,557.6 | 71.6% | 6,671 |
| 2023 | 3,062.1 | 62.5% | 6,682 |
| 2024 | 3,241.4 | 66.0% | 6,682 |
| 2025 | 2,485.5 | 50.8% | 6,718 |
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 |
|---|---|---|---|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | CT | 198.9 | 170 | Aug 2001 | Operating | — | coming soon |
| CTG2 | Natural Gas Fired Combined Cycle | CT | 198.9 | 170 | Aug 2001 | Operating | — | coming soon |
| STG3 | Natural Gas Fired Combined Cycle | CA | 280.5 | 219 | Aug 2001 | Operating | — | coming soon |
Owner / operator
Operator: Los Medanos Energy Center LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Los Medanos Energy Center LLC | 100.0% | 678 MW |
Nearby plants
Within 80 km.
| Columbia Solar Energy, LLC | 19 MW | 1.3 km |
| Diablo Energy Storage | 200 MW | 2.4 km |
| Delta Energy Center | 944 MW | 2.9 km |
| Pittsburg RV Solar | — | 3.2 km |
| Ameresco Keller Canyon | 4 MW | 6.1 km |
| Riverview Energy Center | 47 MW | 7.4 km |