Walnut Creek Energy Park
Natural gas power plant in Los Angeles County, California. 500 MW of nameplate capacity across 5 generators, operated by Walnut Creek LLC.
Also known as EIA plant 57515
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 500 MWNameplate
- Generators
- 5 operatingEIA-860M, August 2026
- Operating since
- April 2013First generator online
- Operator
- Walnut Creek LLCEIA operator ID 59980
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 5 CAISO nodesResource nodes with prices
- Location
- Los Angeles County, CA34.0087, −117.9449
- EIA plant ID
- 57515EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Walnut Creek Energy Park produces
Free · EIA-923Net generation, 2025
45.1 GWh
45,060 MWh, final
Capacity factor, 2025
1.0%
2024: 6.3%
January to July 2026
16.2 GWh
Provisional. 6 of 7 months reported
Range, 2015 to 2025
45.1–492.3
GWh a year. Low 2025, high 2022
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | 316,129 | Not reported | 11 of 12 |
| 2014 | 489,374 | 11.2% | 12 of 12 |
| 2015 | 439,715 | 10.0% | 12 of 12 |
| 2016 | 445,550 | 10.1% | 12 of 12 |
| 2017 | 347,160 | 7.9% | 12 of 12 |
| 2018 | 382,025 | 8.7% | 12 of 12 |
| 2019 | 456,237 | 10.4% | 12 of 12 |
| 2020 | 419,440 | 9.6% | 12 of 12 |
| 2021 | 249,812 | 5.7% | 12 of 12 |
| 2022 | 492,258 | 11.2% | 12 of 12 |
| 2023 | 371,360 | 8.5% | 12 of 12 |
| 2024 | 278,182 | 6.3% | 12 of 12 |
| 2025 | 45,060 | 1.0% | 12 of 12 |
| 2026 (provisional, partial year) | 16,155 | 0.7% | 6 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · CAISOEmissions
Free · EPA CAMPDCO₂, 2025
26,525
US short tons. 2024: 152,118
SO₂, 2025
0
US short tons
NOx, 2025
2
US short tons
CO₂ per MWh, calculated
0.59 t
About 1,177 lb per MWh
5 of 5 EPA units reported CO₂ in 2025 (GT1, GT2, GT3, GT4, GT5), matched to EIA plant 57515 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GT1 | Natural Gas Fired Combustion Turbine | 100.0 | April 2013 |
| GT2 | Natural Gas Fired Combustion Turbine | 100.0 | April 2013 |
| GT3 | Natural Gas Fired Combustion Turbine | 100.0 | April 2013 |
| GT4 | Natural Gas Fired Combustion Turbine | 100.0 | April 2013 |
| GT5 | Natural Gas Fired Combustion Turbine | 100.0 | May 2013 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Walnut Creek LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about Walnut Creek Energy Park
How much power does Walnut Creek Energy Park produce?
Walnut Creek Energy Park reported 45,060 MWh (45.1 GWh) of net generation in 2025, a 1.0% capacity factor on 500 MW of nameplate capacity. From January to July 2026 it reported 16.2 GWh, which is provisional.
Where is Walnut Creek Energy Park?
Walnut Creek Energy Park is in Los Angeles County, California, at 34.0087, −117.9449. It is in the California Independent System Operator balancing area (CISO).
Who operates Walnut Creek Energy Park?
EIA-860M for August 2026 lists Walnut Creek LLC as the operator (EIA operator ID 59980). The operator is not always the owner.
When did Walnut Creek Energy Park start operating?
Its first generator began operating in April 2013, according to EIA-860M.
Does InfraMap have power prices for Walnut Creek Energy Park?
Yes. InfraMap has CAISO day-ahead and real-time prices at 5 price nodes linked to Walnut Creek Energy Park, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- CAISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page