How big is Delta Energy Center?

Delta Energy Center has a reported capacity of 943.5 MW. Source: EIA Form 860.

What kind of plant is Delta Energy Center?

Delta Energy Center is a Natural Gas Fired Combined Cycle facility in Contra Costa County, CA, participating in the CAISO market.

Where is Delta Energy Center located?

Delta Energy Center is in Contra Costa County, CA, inside the CAISO balancing area.

Who operates Delta Energy Center?

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

How much electricity does Delta Energy Center generate?

Delta Energy Center reported 3,609 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

How does Delta Energy Center compare to other plants?

By capacity, Delta Energy Center ranks #101 of 538 operating plants of the same technology nationally. It ranks #5 of 64 in CA.

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Natural Gas Fired Combined CycleCAISO · Contra Costa County

Delta Energy Center

Constellation Energy Corporation · Contra Costa County · CAISO

Delta Energy Center is a natural gas-fired power facility with 943.5 MW of EIA-reported nameplate capacity in Contra Costa County, California, registered as EIA Plant ID 55333. Calpine Corporation is the current owner; Delta Energy Center LLC is the registered plant entity or operator. The plant's generating configuration is natural-gas-fired combined-cycle cogeneration facility with three Westinghouse 501F combustion-turbine generators, three HRSGs with duct burners, and one shared steam-turbine generator.

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plant:plant-55333

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Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.

Overview

Key fields

Reported capacity: 943.5 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Natural Gas Fired Combined Cycle
Primary generation technology.
Registry anchor: Plant 55333
Delta Energy Center LLC · Contra Costa County · CAISO
Operating status: Operating
Delta Energy Center is operating.

Profile

Grid role: Local-capacity-area generation serving the SF Bay Area; CAISO's generator listing assigns the Delta Energy Center units to the SF Bay Area local capacity area.
Physical build: An 880 MW natural-gas-fired combined-cycle cogeneration facility consisting of three Westinghouse 501F combustion-turbine generators, three heat-recovery steam-generator (HRSG) units with duct burners, one shared steam-turbine generator, cooling towers, associated support equipment, and two auxiliary boilers supplying process steam to Dow.

Structured profile

Reported capacity: 943.5 MW
Natural Gas Fired Combined Cycle
Operating status: operating
Delta Energy Center is operating.
Location: Contra Costa County
CAISO
Operator: Delta Energy Center LLC
Asset role

Units and generators

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

Generator	Capacity	Technology	Operation	Status
CTG1	212 MW 184 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	May 2002	Operating
CTG2	212 MW 183 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	May 2002	Operating
CTG3	213.5 MW 183 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	May 2002	Operating
STG1	306 MW

Performance

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

Peer context

Technology capacity: 943.5 MW
National rank: #101
CA rank: #5

Monthly generation

Download CSV

Latest 12 months

3.61 TWh

Reported net generation

Latest report

Apr 2026

EIA-923 monthly filing

2025 capacity factor

50.1%

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

DELTA ENERGY

NOT AVAILABLE · 60 kV

0.3 km

TAP310895

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

Acquisition Of Joint Venture Partner Interest

Nov 2001

Calpine acquired Bechtel's 50% interest in Delta Energy Center on November 6, 2001. Disclosed transaction package ($154M cash + $141M debt assumption) covered Delta plus Metcalf and Russell City; no Delta-specific allocation disclosed.

$154MCalpine Corporation · Bechtel Enterprises Holdings, Inc.

Source

RMR Settlement Certification

Aug 14, 2003

FERC certified uncontested settlement concerning Delta RMR Agreement among Delta, CAISO, and PG&E on August 14, 2003. Cited record does not disclose numeric duration or contracted capacity.

Delta Energy Center LLC · California Independent System Operator Corporation · Pacific Gas and Electric Company

UNITED STATES OF AMERICA 104 FERC ¶ 63,039 FEDERAL ENERGY REGULATORY COMMISSION Delta Energy Center, L.L.C. Docket No. ER03-510-000 CERTIFICATION

Land and environmental record

Air Compliance

2018

2018 annual compliance report states maximum projected toxic-air-contaminant (TAC) emissions limitations were not exceeded

Calpine annual compliance report filed with CEC (2018) states that maximum projected TAC emissions limitations were not exceeded and includes facility compliance condition summary.

DOCKETED

Cooling Water Source

Cooling-tower makeup water: secondary-treated wastewater from Delta Diablo Sanitation District with additional on-site treatment. Steam production and domestic water: Contra Costa Water District

CEC states secondary-treated Delta Diablo wastewater receives additional on-site treatment before cooling-tower use per Department of Health Services requirements. Contra Costa Water District supplies steam-production and domestic water via Dow Chemical's 20-inch pipeline. Compliance conditions require tertiary-treated Delta Diablo effluent for cooling makeup whenever possible.

Delta Energy Center | California Energy Commission

Emissions Controls

Three Westinghouse 501F combustion turbines with dry-low-NOx combustors, three HRSGs with duct burners, one shared steam turbine, and selective catalytic reduction (SCR)

CEC describes three-by-three-by-one combined-cycle configuration with dry-low-NOx combustion and SCR for emissions control. Plant supplies process steam to Dow Chemical through auxiliary boilers.

Delta Energy Center | California Energy Commission

Environmental Certification And Operation

Feb 9, 2000

CEC certification: February 9, 2000; commercial operation: May 10, 2002

California Energy Commission certified Delta Energy Center project on February 9, 2000 (Docket 98-AFC-03). Facility began commercial operation on May 10, 2002.

Delta Energy Center | California Energy Commission

Wastewater Handling

All plant discharges routed to Delta Diablo Sanitation District for disposal through its existing discharge pipe

CEC states all plant discharges sent to Delta Diablo for disposal. 2026 Delta Diablo NPDES permit (R2-2026-0004) identifies Delta Energy Center blowdown at monitoring location EFF-003, downstream of secondary treatment, before mixing with treated wastewater.

Delta Energy Center | California Energy Commission

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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AssetOwner / operatorOrganization

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

1999
1999
Initial Project DevelopmentSource
Calpine and Bechtel Enterprises began developing an approximately 874 MW natural-gas-fired cogeneration project in Pittsburg, California.
Feb 9, 2000
Feb 9, 2000

Delta Energy Center

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Delta Energy Center

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Overview

Key fields

Profile

Structured profile

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Parties and identifiers

Reporting portfolio

Sources

Common questions about Delta Energy Center

How big is Delta Energy Center?

What kind of plant is Delta Energy Center?

Where is Delta Energy Center located?

Who operates Delta Energy Center?

How much electricity does Delta Energy Center generate?

How does Delta Energy Center compare to other plants?

Co-located assets

Related assets

Los Medanos Energy Center

Marsh Landing Generating Station

Gateway Generating Station

Russell City Energy Center

Metcalf Energy Center

Colusa Generating Station