Docket Number
500 MW
Contra Costa County
Combined Cycle
Project Status
Operational (Natural Gas-Fired)
Project Type
Application for Certification
Project Description

The Los Medanos Energy Center (LMEC) is located on a 12-acre site on East 3rd Street, west of the intersection of East 3rd and Columbia in the City of Pittsburg, in eastern Contra Costa County. The site is on the northwest corner of property owned by USS-POSCO Industries.

LMEC is a nominal 500-megawatt (MW) combined cycle licensed as the Pittsburg District Energy Facility. LMEC consists of two trains of combustion turbine generators with a steam turbine generator. The combustion turbine trains include exhaust stacks and step-up transformers, heat recovery steam generator units, steam turbine generator units and their transformers, and water treatment and cooling towers. A 115-kilovolt high voltage switchyard is on the west side of the project site. Reclaimed water for turbine cooling is supplied from the Delta Diablo Wastewater Treatment Facility located in the City of Antioch.

On March 22, 2000, the California Energy Commission (CEC) approved a Post-Certification Amendment (PCA) (TN 14009) to change the name of the project From Pittsburg District Energy Facility to the Los Medanos Energy Center, to add a second circuit to the 115 kilovolt (kV) transmission line to increase the reliability of electricity to USS-POSCO, to modify the fuel gas pipeline to connect with the gas line at the Delta Energy Center project and tie in with the Pacific Gas & Electric (PG&E) Line 400, and to modify the steam line to allow the project to serve as back up steam supplier for Dow Chemical.

On May 18, 2011, the CEC approved a PCA (TN 60704) to make efficiency improvements, by increasing the turbine firing temperature, to the Advanced Gas Path in the existing turbines S-1 and S-3.

On March 8, 2021, a PCA (TN 237030) was docketed seeking approval to allow the LMEC to supply approximately one percent of its treated stack gas via above-ground pipeline to a neighboring carbon capture and utilization project being developed by San Francisco Bay Aggregates. The carbon capture and utilization facility would remove carbon dioxide (CO2) from the delivered flue gas and combine it with locally sourced demolished or returned concrete to produce new CO2-sequestered and up cycled rock products. This PCA is currently under review.

On April 23, 2021, a PCA (TN 237531) was docketed seeking approval to allow the LMEC to supply approximately 0.04 percent of its treated stack gas via above-ground pipeline to an onsite to a carbon capture and utilization pilot project. The pilot project will be in operation for approximately 15 months with the equipment removed from the site after the pilot project is completed. This PCA is currently under review.

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.

Original Proceeding

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Docket Log (98-AFC-01)

Exhibit List

Proof of Service List

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John Heiser

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