Gateway - PG&E (formerly Contra Costa)

Docket Number:

00-AFC-01 (Application For Certification)
00-AFC-01C (Compliance Proceeding)

Project Status: Licensed; In Compliance Phase.
Operational: January 4, 2009

The California Energy Commission approved this project's Application For Certification on May 30, 2001. The Commission monitors the power plant's construction, operation and eventual decommissioning through a compliance proceeding.

Key Dates


On January 31, 2000, the Southern Energy Delta Limited Liability Company filed an Application for Certification (AFC) for the Gateway Contra Costa Power Plant Unit 8 Power Project (CCPP). The proposed CCPP Unit 8 Power Project will be a nominal 530 megawatt (MW), natural gas-fired, combined cycle, combustion turbine power plant located within the existing Gateway Contra Costa Power Plant site complex in Contra Costa County, just north of the City of Antioch.

The CCPP site is on Wilbur Avenue, one mile northeast of Antioch, on the southern shore of the San Joaquin River. Highway 4 and the Antioch Bridge are just east of the site. Immediately south and west of the site are existing industrial facilities. The river borders the north side, while a recreational marina, open space and additional industrial land uses occur east of the proposed project.

CCPP Unit 8's combined cycle power unit would consist of two natural gas-fired combustion turbine generators, two heat recovery steam generators (HRSGs), and a steam turbine generator. In the combined cycle process, electricity is created from the combustion turbines and the steam turbine. Natural gas is burned to fire the combustion turbines. Exhaust heat from the two combustion turbines is then used to generate steam in the HRSGs, which in turn drives the steam turbine electricity generator. The combined cycle process is considered to be "state of the art" in that it creates electricity more efficiently and creates less pollution than conventional power systems. The natural gas fuel for Unit 8 would be supplied by the existing gas pipeline. Cooling water for Unit 8 would be supplied by re-use of the cooling water from the existing Units 6 and 7. According to the applicant's project description, no net increase in water withdrawal from the San Joaquin River is anticipated. Additional project facilities would include two 195-foot tall exhaust stacks on the heat recovery generators, a 10-cell water cooling tower, a turbine building, storage tanks, a control building, and electrical power transformers and transmission facilities to interconnect with the existing PG&E switchyard on the CCPP site complex. As described by the applicant, no additional electric transmission lines outside of the CCPP complex are needed to transmit Unit 8's electricity to the regional transmission grid. Southern Energy Delta proposes to begin construction in early 2001, and start operation of CCPP Unit 8 by late 2002 or early 2003. The proposed project is estimated to cost between $250 and $300 million. During the 22-month construction period, approximately 285 construction workers would be employed. During operation, the CCPP Unit 8 would require 10 additional full time employees to the existing CCPP workforce of 53 employees.

CCPP Unit 8 would be operated as a merchant power facility, selling its energy via direct sales agreements and in the spot market via the California Power Exchange. Energy output and operational levels would vary according to demand in the deregulated California energy market. Electricity prices and operational levels would not be subject to California Public Utilities Commission (CPUC) regulation.

If you are looking for the Contra Costa Generating Station, now called Oakley Generating Station, (docket # 09-AFC-4), please go to:

Energy Commission Facility Certification Process

The California Energy Commission is the lead agency (for licensing thermal power plants 50 megawatts and larger) under the California Environmental Quality Act (CEQA) and has a certified regulatory program under CEQA. Under its certified program, the Energy Commission is exempt from having to prepare an environmental impact report. Its certified program, however, does require environmental analysis of the project, including an analysis of alternatives and mitigation measures to minimize any significant adverse effect the project may have on the environment.

For Questions About This Siting Case Contact:

Anwar Ali
Project Manager
Siting, Transmission and Environmental Protection (STEP) Division
California Energy Commission
1516 Ninth Street, MS-15
Sacramento, CA 95814
Phone: 916-654-5020

For Questions About Participation In Siting Cases Contact:

Public Adviser
California Energy Commission
1516 Ninth Street, MS-12 Sacramento, CA 95814
Phone: 916-654-4489
Toll-Free in California: 1-800-822-6228

News Media Please Contact:

Media & Public Communications Office
Phone: 916-654-4989

Compliance Proceeding

Original Proceeding



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