Docket Number
200 MW
Alameda County
Simple Cycle
Project Status
Operational (Natural Gas-Fired)
Project Type
Application for Certification
Project Description

The Mariposa Energy Project (MEP) is located in northeastern Alameda County, approximately 7 miles northwest of Tracy, 7 miles east of Livermore, 6 miles south of Byron, and approximately 2.5 miles west of the community of Mountain House. The facility is southeast of the intersection of Bruns Road and Kelso Road on a 10-acre portion of a 158-acre parcel (known as the Lee Property) immediately south of the Pacific Gas and Electric Company Bethany Compressor Station and 230 kilovolt Kelso Substation.

MEP is a 200-megawatt (MW) natural gas-fired, simple-cycle generating facility consisting of four General Electric (GE) LM6000 PC-SPRINT combustion turbine generators and associated equipment. Linear facilities include a 580-foot natural gas pipeline and a 1.8-mile water connection with the Byron Bethany Irrigation District.

On July 30, 2015, the California Energy Commission approved a Post-Certification Amendment (TN 205635) for the installation of supplemental, temporary water storage tanks for use during a possible water curtailment. The backup temporary water supply tanks were necessary to ensure an adequate water supply to MEP if water delivery was curtailed.

Attention: Non-hypertext items above will need to be requested from the Compliance Project Manager, along with the document TN number, if provided above.

Power Plant Certification and Exemption Processes

The CEC has the exclusive authority to certify all thermal power plants 50 megawatts (MW) and larger and related facilities proposed for construction in California. The Application for Certification (AFC) process is a certified regulatory program under the California Environmental Quality Act (CEQA). As a certified regulatory program, the CEC does not prepare environmental impact reports (EIRs) in an AFC proceeding, but instead prepares environmental assessment documents that are functionally equivalent to EIRs. A certificate issued by the CEC is in lieu of any permit, certificate, or similar document otherwise required by any state, local or regional agency, or federal agency to the extent permitted by federal law, and supersedes any applicable statute, ordinance, or regulation of any state, local, or regional agency, or federal agency to the extent permitted by federal law.

Original Proceeding

e-Commenting has been closed. Please submit your comments in compliance proceeding above.

Docket Log (09-AFC-03)

Exhibit List

Proof of Service List

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Anwar Ali
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