Walnut Creek Energy Park
Los Angeles County, California · EIA plant ID 57515 · Operator: NRG Walnut Creek LLC
Nameplate500MWSummer 501 MW
Generators5in service
Net generation67GWh12 mo to Aug 2026
Capacity factor2%gas/coal/oil units, summer MW
Heat rate9,569Btu/kWhfossil units, electric fuel, HHV
First online2013Runs as peaking
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) |
|---|---|---|---|
| 2013 | 316.1 | 10.1% | 9,589 |
| 2014 | 489.4 | 11.5% | 9,660 |
| 2015 | 439.7 | 10.3% | 9,707 |
| 2016 | 445.6 | 10.5% | 9,800 |
| 2017 | 347.2 | 8.2% | 9,763 |
| 2018 | 382 | 9.0% | 10,213 |
| 2019 | 456.2 | 10.7% | 9,801 |
| 2020 | 419.4 | 9.8% | 9,891 |
| 2021 | 249.8 | 5.9% | 9,523 |
| 2022 | 492.3 | 11.6% | 9,190 |
| 2023 | 371.4 | 8.7% | 9,334 |
| 2024 | 278.2 | 6.3% | 9,207 |
| 2025 | 45.1 | 1.0% | 9,906 |
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 |
|---|---|---|---|---|---|---|---|---|
| GT1 | Natural Gas Fired Combustion Turbine | GT | 100 | 100.1 | Apr 2013 | Operating | — | coming soon |
| GT2 | Natural Gas Fired Combustion Turbine | GT | 100 | 100.1 | Apr 2013 | Operating | — | coming soon |
| GT3 | Natural Gas Fired Combustion Turbine | GT | 100 | 100.1 | Apr 2013 | Operating | — | coming soon |
| GT4 | Natural Gas Fired Combustion Turbine | GT | 100 | 100.1 | Apr 2013 | Operating | — | coming soon |
| GT5 | Natural Gas Fired Combustion Turbine | GT | 100 | 100.1 | May 2013 | Operating | — | coming soon |
Owner / operator
Operator: NRG Walnut Creek LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| NRG Walnut Creek LLC | 100.0% | 500 MW |
Nearby plants
Within 80 km.
| Marici | — | 0.2 km |
| MM West Covina | 7 MW | 4.5 km |
| Puente Hills Energy Recovery | 50 MW | 7.5 km |
| Walnut Unified School District Walnut HS Hybrid | 2 MW | 8.8 km |
| Industry MetroLink PV 1 | 2 MW | 9.1 km |
| Coyote Creek | 3 MW | 9.4 km |