- Docket Number
- 510 MW
- San Diego County
- Combined Cycle
- Project Status
- Operational (Natural Gas-Fired)
- Project Type
- Application for Certification
Otay Mesa Energy Center (OMEC) is located approximately 15 miles southeast of downtown San Diego and about 1.5 miles north of the United States/Mexico border. The plant itself is situated on a 15-acre parcel northeast of the intersection of Otay Mesa and Alta Roads.
OMEC is a nominal 510-megawatt (MW) combined cycle plant consisting of two power islands, air-cooled condensers, a 230 kV switchyard, an administration building, storage tanks and ancillary facilities. Each power island consists of an F-class combustion turbine generator nominally rated at 170 MW, a heat recovery steam generator (HRSG), a 160-foot tall HRSG exhaust stack, and a nominally rated 90 MW steam turbine generator for each power train. Total net output of each unit is approximately 255 MW.
The project uses dry cooling technology, while process water for steam generation and potable water for domestic needs will be supplied by the Otay Water District. Wastewater from the plant is transported to San Diego County's sewer system from the plant, via a 2-mile pipeline that connects to an existing line in Johnson Canyon.
On January 21, 2004, the California Energy Commission (CEC) approved a Post-Certification Amendment (PCA) (TN 30797) to separate and increase stack height of the HRSG/Turbines, and adding duct firing, an auxiliary boiler and a wet surface air condenser.
On February 10, 2016, the CEC approved a PCA (TN 210348) to replace certain combustion section components (turbine blades, nozzles and associated structural elements) with Advanced Gas Path (AGP) components on the two existing combustion turbines.
Power Plant Certification and Exemption Processes
As required by the Warren-Alquist Act, the Energy Commission monitors Commission-certified energy projects throughout construction, operation, and closure to ensure compliance with the conditions of certification imposed by the Commission’s Final Decision for approving the projects.