Los Medanos Energy Center
Los Medanos Energy Center LLCContra Costa County
Los Medanos Energy Center is a natural-gas-fired combined-cycle cogeneration facility located on a 12-acre site in Pittsburg, Contra Costa County, California, adjacent to the USS-POSCO steel mill. The facility consists of two General Electric Frame 7FA gas turbines, two Nooter/Eriksen heat-recovery steam generators, and one General Electric D11 steam turbine in a 2×1 configuration. Reclaimed water for cooling is supplied by the Delta Diablo Sanitation District.
Mapped infrastructure geometry associated with this asset.
EIA plant 55217 · Inventory for Aug 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | Operating | 198.9 | Unknown |
| CTG2 | Natural Gas Fired Combined Cycle | Operating | 198.9 | Unknown |
| STG3 | Natural Gas Fired Combined Cycle | Operating | 280.5 | Unknown |
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| CTG1 | 198.9 MW 170 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Aug 2001 | Operating |
| CTG2 | 198.9 MW 170 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Aug 2001 | Operating |
| STG3 | 280.5 MW 219 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CA | Aug 2001 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Project milestones and public references behind the asset profile.
California Energy Commission certified the Pittsburg District Energy Facility under docket 98-AFC-01 after comprehensive environmental and technical review.
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
California Energy Commission approved Post-Certification Amendment TN 14009 to change project name from Pittsburg District Energy Facility to Los Medanos Energy Center; add second 115-kV circuit to increase reliability to USS-POSCO; modify fuel gas pipeline to connect with Delta Energy Center gas line and PG&E Line 400; and modify steam line to allow backup steam supply to Dow Chemical.
California Energy Commission approved Petition TN 25797 for installation of a power-augmentation steam-injection system to enhance plant performance.
EIA-860 lists generator CTG1, generator CTG2, generator STG3 with this operating date.
California Energy Commission approved Order 08-0910-04 (TN 48013) to add a new 4,950-foot double-circuit 115-kilovolt transmission line extending from Los Medanos Energy Center to the Dow Pittsburg Facility located east of LMEC.
California Energy Commission approved Order 11-0518-14 (TN 60704) to make efficiency improvements to the Advanced Gas Path in existing turbines S-1 and S-3 by increasing turbine firing temperature, thereby generating more power from the same fuel input without increasing emissions.
Los Medanos Energy Center, LLC filed Post-Certification Amendment petition TN 237030 with California Energy Commission seeking approval to supply approximately 1% of treated stack gas via above-ground pipeline to a neighboring carbon-capture and utilization project being developed by San Francisco Bay Aggregates.
Los Medanos Energy Center, LLC filed Post-Certification Amendment petition TN 237531 seeking approval to allow the facility to work with ION Clean Energy to demonstrate its solvent-based carbon-capture technology on a pilot scale, using approximately 0.04% of treated stack gas from a single turbine exhaust.
California Energy Commission approved Post-Certification Amendment TN 237030 to allow Los Medanos to supply approximately 1% of its treated stack gas to San Francisco Bay Aggregates' carbon-capture and utilization project, which removes CO2 from flue gas and combines it with recycled concrete to produce CO2-sequestered aggregate products.
California Energy Commission approved Post-Certification Amendment TN 237531 for the onsite carbon-capture pilot project with ION Clean Energy. The pilot is temporary, approved for approximately 15 months of operation, with equipment removal after completion.
Constellation Energy Corporation completed its acquisition of Calpine Corporation from Energy Capital Partners. Los Medanos Energy Center became part of the Constellation corporate portfolio through the Calpine business. The combined company integrates Constellation's zero-emission nuclear fleet with Calpine's natural-gas and geothermal generation.
powergen.wordpress.compowergen.wordpress.compublic_sourceAnswered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Los Medanos Energy Center reports 678.3 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Aug 2026.
Los Medanos Energy Center is a Natural Gas Fired Combined Cycle facility in Contra Costa County, CA, participating in the CAISO market.
Los Medanos Energy Center is in Contra Costa County, CA, inside the CAISO balancing area.
Los Medanos Energy Center is operated by Los Medanos Energy Center LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Los Medanos Energy Center reported 2,649.4 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
By capacity, Los Medanos Energy Center ranks #194 of 540 operating plants of the same technology nationally. It ranks #11 of 64 in CA.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.