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Otay Mesa Energy Center

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The Otay Mesa Energy Center near San Diego, California, is a highly efficient, natural gas-fired, combined-cycle facility.  The plant consists of two combustion turbine generators with advanced air emissions control technologies, two heat recovery steam generators with duct burners and a single condensing steam turbine generator.

Otay Mesa supplies San Diego Gas & Electric (SDG&E) electricity in connection with a 10-year tolling agreement.  Under the terms of the agreement, SDG&E has the ability to dispatch power from the Otay Mesa plant to serve its energy customers, and the utility supplies natural gas to fuel the power plant.  The Otay Mesa Energy Center produces power for the greater San Diego area, which has been identified by the California System Operator as one of the most generation-deficient areas in the state.

For Otay Mesa, in a first-of-its-kind program dating back to the beginning of construction, mobile emission reduction credits were created when Calpine paid for retrofitting local marine vessels and sanitation vehicles with vastly improved technology.  These permanently retired emissions more than offset emissions from the plant, resulting in a net air quality benefit for the San Diego region.  Finally, Otay Mesa is the largest air-cooled power plant in the State of California, conserving precious water by eliminating the need to use ground or potable municipal water to cool recirculated steam.
Location:San Diego, CA
Commercial Operation Date:October 2009
Calpine Net Interest Baseload (MW):513 megawatts
Calpine Net Interest With Peaking (MW):608 megawatts
Ownership:Calpine 100%
Technology:Natural gas-fired, combined-cycle
Turbines:GE combustion and Siemens Westinghouse steam
NERC Region:WECC