Delta Energy Center — 944 MW gas plant, CA

Delta Energy Center — 944 MW gas plant, CA · Ask the Grid

Generation and physical site

EIA plant 55333 · Inventory for Sep 2026.

Reported operating nameplate by technology

Natural gas: 943.5 MW

Operating generators only. Battery power is in MW; stored energy is in MWh. These ratings do not establish a shared export limit.

Generator records (4)

EIA generator status and nameplate capacity for Delta Energy Center
Generator	Technology	Status	Power (MW)	Energy (MWh)
CTG1	Natural Gas Fired Combined Cycle	Operating	212	Unknown
CTG2	Natural Gas Fired Combined Cycle	Operating	212	Unknown
CTG3	Natural Gas Fired Combined Cycle	Operating	213.5	Unknown
STG1	Natural Gas Fired Combined Cycle	Operating	306	Unknown

Physical map location · OpenStreetMap: 38.01761, -121.84564
Filed location · EIA: 38.01690, -121.84390

Sources and observation dates

Inventory source: EIA-860M workbook (preliminary)
EIA reporting month: Sep 2026
EIA retrieved: Oct 24, 2026
OSM extract: Oct 9, 2026
OSM last mapped edit: May 26, 2025
Map prepared: Oct 24, 2026
Field verification: Not reported

Reporting month describes the inventory. Retrieval and map preparation describe processing; an OSM edit does not establish an in-service date.

EIA source inventory

Units and generators

Current 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 CT	May 2002	Operating
CTG2	212 MW 183 MW summer	Natural Gas Fired Combined Cycle CT	May 2002	Operating
CTG3	213.5 MW 183 MW summer	Natural Gas Fired Combined Cycle CT	May 2002	Operating
STG1	306 MW 292 MW summer	Natural Gas Fired Combined Cycle CA	May 2002	Operating

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.

$154.0MCalpine 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

Mapped facility footprint

Mapped infrastructure geometry associated with this asset.© OpenStreetMap contributors · way/35836656

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
CEC certification and constructionDelta Energ...
The California Energy Commission certified the project. Calpine's contemporaneous filing states that construction began in mid-2000.
Nov 2001
Nov 2001
Acquisition ClosedSource
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.
View 3 more milestonesHide 3 milestones
1. May 2002
  May 2002
  Generators enter operationEIA-860
  EIA-860 lists generator CTG1, generator CTG2, generator CTG3, generator STG1 with this operating date.
2. Nov 14, 2002
  Nov 14, 2002
Aug 18, 2017
Aug 18, 2017
Calpine take-private agreement announcedSource
Calpine announced an agreement to be acquired for $15.25 per share in cash, or approximately $5.6 billion, by an investor consortium led by Energy Capital Partners, Access Industries, and Canada Pension Plan Investment Board.
Feb 8, 2018
Feb 8, 2018
Return to combined-cycle operationDelta Energ...
The CEC docketed confirmation that Delta Energy Center had completed repairs and returned to combined-cycle power-plant operations.
Jan 10, 2025
Jan 10, 2025
Constellation-Calpine Acquisition AnnouncedConstellati...
Constellation announced a proposed acquisition of Calpine in a cash-and-stock transaction with approximately $16.4 billion of equity consideration plus assumed Calpine net debt.

Sources

PublisherReferenceType

U.S. Energy Information AdministrationEIA-860 generator inventoryFederal registry

U.S. Energy Information AdministrationEIA-923 generation filingsFederal filing

energy.ca.govCross-Reference Tableregulatory

Common questions about Delta Energy Center

Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.

How big is Delta Energy Center?

Delta Energy Center reports 943.5 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.

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 3,371.5 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.

How does Delta Energy Center compare to other plants?

By capacity, Delta Energy Center ranks #103 of 540 operating plants of the same technology nationally. It ranks #5 of 64 in CA.

Co-located assets

Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.

Columbia Solar Energy, LLCSolar PhotovoltaicSolar Photovoltaic19 MW1.7 km Los Medanos Energy CenterNatural Gas Fired Combined CycleNatural Gas Fired Combined Cycle · same type678 MW2.8 km Riverview Energy CenterNatural Gas Fired Combustion TurbineNatural Gas Fired Combustion Turbine · same type47 MW4.8 km Diablo Energy StorageBatteries

Overview

Overview

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Infrastructure record

Profile

Structured profile

Generation and physical site

Reported operating nameplate by technology

Related assets

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Gateway Generating Station

Russell City Energy Center

Metcalf Energy Center

Colusa Generating Station

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Market registration

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Land and environmental record

Related parties and identifiers

Relationship graph

Parties and identifiers

Reporting portfolio

Timeline and sources

Project timeline

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

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