How big is Walnut Creek Energy Park?

Walnut Creek Energy Park has a reported capacity of 500 MW. Source: EIA Form 860M.

What kind of plant is Walnut Creek Energy Park?

Walnut Creek Energy Park is a Natural Gas Fired Combustion Turbine facility in Los Angeles County, CA, participating in the CAISO market.

Where is Walnut Creek Energy Park located?

Walnut Creek Energy Park is in Los Angeles County, CA, inside the CAISO balancing area.

Who operates Walnut Creek Energy Park?

Walnut Creek Energy Park is operated by Walnut Creek LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Walnut Creek Energy Park generate?

Walnut Creek Energy Park reported 40.5 GWh over the twelve months to 2026-03. Figures are net generation as filed to EIA-923.

How does Walnut Creek Energy Park compare to other plants?

By capacity, Walnut Creek Energy Park ranks #90 of 825 operating plants of the same technology nationally. It ranks #5 of 136 in CA.

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Walnut Creek Energy Park

Walnut Creek Energy, LLC - Los Angeles County - CAISO

Walnut Creek Energy Park is a 500-megawatt natural-gas-fired simple-cycle peaking facility located at 911 Bixby Drive in the City of Industry, Los Angeles County, California. It provides fast-start generation for periods of high demand, in-basin voltage support, and renewable-resource integration, connected to Southern California Edison's electrical system at the Walnut Substation via a 230-kilovolt transmission line.

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CAISO · Asset profile

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Walnut Creek Energy Park — 500 MW gas plant, CA · Ask the Grid

Overview

Nameplate capacity: 500 MW
Canonical EIA plant baseline.
Registry anchor: Plant 57515
plant-57515

Structured profile

Technology: Natural Gas Fired Combustion Turbine
Operator: Walnut Creek Energy, LLC

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Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
GT1	100 MW 100.1 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Apr 2013	Operating
GT2	100 MW 100.1 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Apr 2013	Operating
GT3	100 MW 100.1 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Apr 2013	Operating
GT4	100 MW 100.1 MW summer

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity: 500 MW
National rank: #90
CA rank: #5

Monthly generation

Download CSV

Latest 12 months

40.5 GWh

Reported net generation

Latest report

Mar 2026

EIA-923 monthly filing

2025 capacity factor

1.0%

Grid and market context

Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.

Nearby substations

HIFLD infrastructure inventory

WALNUT

IN SERVICE · 230 kV

0.5 km

PUENTE

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Transactions and agreements

Regulatory Approval

Feb 27, 2008

The California Energy Commission certified the Walnut Creek Energy Park under docket 05-AFC-02.

California Energy Commission · Walnut Creek Energy, LLC

energy.ca.gov

Construction Completion

Jun 11, 2013

Walnut Creek Energy completed construction of the 500 MW simple-cycle peaking plant. Kiewit served as engineering, procurement and construction contractor.

Walnut Creek Energy, LLC · Kiewit Power Constructors

power-eng.com

Regulatory Approval

Jun 25, 2021

The CEC approved revised hourly fuel-input and ammonia-flow rates, producing a net increase in permitted turbine output of approximately 17.4 MW.

California Energy Commission · Walnut Creek Energy, LLC

energy.ca.gov

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

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AssetContractorEquipmentMarket / regulatorOrganization

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Feb 27, 2008
Feb 27, 2008
CEC Certificationenergy.ca.g...
The California Energy Commission certified the Walnut Creek Energy Park under docket 05-AFC-02.
Jun 2011
Jun 2011
Construction Began

Walnut Creek Energy Park

Ask about Walnut Creek Energy Park

Walnut Creek Energy Park

Ask about Walnut Creek Energy Park

Overview

Structured profile

Related assets

El Segundo Energy Center LLC

Watson Cogeneration

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

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Parties and identifiers

Reporting portfolio

Sources

Common questions about Walnut Creek Energy Park

How big is Walnut Creek Energy Park?

What kind of plant is Walnut Creek Energy Park?

Where is Walnut Creek Energy Park located?

Who operates Walnut Creek Energy Park?

How much electricity does Walnut Creek Energy Park generate?

How does Walnut Creek Energy Park compare to other plants?

Co-located assets