For Immediate Release: May 18, 2011
Media Contact: Sandy Louey - 916-654-4989


Energy Commission Licenses Two East Bay Power Plants
824 Megawatts Proposed for Local Communities

Sacramento - The California Energy Commission today approved the construction of two natural gas-fired power plants in the East Bay.

In two separate unanimous votes, the Energy Commission adopted the presiding member's proposed decisions (PMPDs) that recommended licensing the 200-megawatt Mariposa Energy Project in northeastern Alameda County and the 624-megawatt Oakley Generating Station Project in eastern Contra Costa County.

"Approving these natural gas power plants will help meet California's growing energy needs," Energy Commission Chair Dr. Robert B. Weisenmiller said. "When these facilities come online they will provide reliable power for homes and businesses all around the East Bay."

Natural gas-fired power plants facilitate the expansion of renewable energy power plants such as wind and solar because of their consistent and reliable power.

The PMPDs for the two projects said the facilities, as mitigated, will have no significant impacts on the environment and comply with all applicable laws, ordinances, regulations, and standards. The decisions were based solely on the records of the facts, which were established during the facilities' certification proceedings.

Both PMPDs determined the records, which contain detailed environmental impact assessments required by the California Environmental Quality Act, were adequate. The records for the projects include the Energy Commission staff's thorough independent assessment of the projects' potential impacts on the environment, public health, and safety.

The Mariposa Energy Project is a simple-cycle peaking facility. The project would be located about seven miles northwest of Tracy and seven miles east of Livermore. Mariposa Energy, LLC, which is owned by Diamond Generating Corporation, is the project applicant. Diamond Generating Corporation is a wholly-owned subsidiary of Mitsubishi Corporation. A peaker power plant operates only during high electricity demand.

The proposed project site is in an unincorporated area designated for agricultural use. The facility would be located southeast of the intersection of Bruns and Kelso roads on a 10-acre portion of a 158-acre parcel south of Pacific Gas & Electric Company's Bethany Compressor Station and Kelso Substation. Construction would begin this year with commercial operation by mid-2012 if there are no delays.

The Oakley Generating Station Project is being proposed by Contra Costa Generating Station, LLC, a limited liability corporation owned by Radback Energy, Inc. The proposed project is a combined-cycle electrical generating facility. The project is located on a 21.95-acre site in the city of Oakley in eastern Contra Costa County.

Construction of the plant, from site preparation to commercial operation, will occur over a 33-month period. The applicant has a purchase and sale agreement with PG&E to guarantee commercial availability of power by June 1, 2016.

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