Colusa Generating Station (CGS)

Docket Number:

06-AFC-09 (Application For Certification)
06-AFC-09C (Compliance Proceeding)

Project Status: Licensed; In Compliance Phase.
Operational: December 22, 2010

The California Energy Commission approved this project's Application For Certification on April 23, 2008. The Commission monitors the power plant's construction, operation and eventual decommissioning through a compliance proceeding.

Key Dates


On November 6, 2006, E&L Westcoast, LLC (E&LW), submitted an Application for Certification (AFC), to license and construct the Colusa Generating Station (CGS), electrical power plant project. The proposed project is in response to PG&E's Request for Offer (RFO) and a contract signed by E&LW and PG&E in 2006. This project will be reviewed under the 12-month Energy Commission siting regulations.

The proposed CGS would be a combined cycle power plant using Dry Cooling technology. The project will have a nominal electrical output of 660 MW with commercial operation planned by late spring 2010. The project will be fueled by natural gas delivered to the site via a new 8 inch, 1,500-foot pipeline owned and operated by PG&E. Transmission interconnection will require four (4) double circuit 230 kV lines that will connect to PG&E's existing 230 kV north-south transmission lines located approximately 1,800 feet east of the project site. Water for the project will be provided by the Glenn-Colusa Irrigation District via the Tehama-Colusa Canal, which is located to the west of the project site. The proposed water usage is estimated to be 126.1-acre feet annually and will use a Zero Liquid Discharge wastewater system. Air emissions from the proposed facility would be controlled using Best Available Control Technology with air pollution credits obtained from the Colusa County Air Pollution Control District.

The proposed project site would be located on 31-acres within a 100-acre site leased by E&LW. The site is within the Holthouse Ranch property 14 miles north of Williams and 4 miles west of I-5 in Colusa County, California, The legal description of this site is: Section 35, Township 18 North, Range 4 West, Mount Diablo Base and Meridian (Assessor's Parcel Number (APN) 11-040-024, Colusa County) The proposed CGS will be adjacent to PG&E's existing gas compressor station located west of Glenn-Colusa Bridge and Dirks Road.

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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