Gateway Generating Station
Pacific Gas and Electric Company (PG&E)Contra Costa County
Gateway Generating Station is a natural gas-fired power facility with 619.7 MW of EIA-reported nameplate capacity in Contra Costa County, California, registered as EIA Plant ID 56476. Pacific Gas & Electric Co. is the registered plant entity or operator. Gateway was PG&E’s first new power plant in more than 20 years when it entered service, marking a significant return to new generation construction for the utility.
Mapped infrastructure geometry associated with this asset.
Natural Gas Fired Combined Cycle
Gateway Generating Station is currently operating; a closure or retirement is listed for March 24, 2026.
CAISO
EIA plant 56476 · Inventory for Sep 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| A | Natural Gas Fired Combined Cycle | Operating | 203.2 | Unknown |
| B | Natural Gas Fired Combined Cycle | Operating | 203.2 | Unknown |
| C | Natural Gas Fired Combined Cycle | Operating | 213.3 | Unknown |
Similar plants ranked by technology, capacity, and distance.
Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| A | 203.2 MW 177 MW summer | Natural Gas Fired Combined Cycle CT | Jan 2009 | Operating |
| B | 203.2 MW 177 MW summer | Natural Gas Fired Combined Cycle CT | Jan 2009 | Operating |
| C | 213.3 MW 209.4 MW summer | Natural Gas Fired Combined Cycle CA | Jan 2009 | 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.
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Project milestones and public references behind the asset profile.
Mirant Delta, LLC filed an Application for Certification with the California Energy Commission for the 530-MW Contra Costa Power Plant Unit 8 project.
CAISO · Contra Costa County
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Diablo Canyon | 2,323 MW | CA | |
| Helms Pumped Storage | 1,053 MW | CA | |
| Colusa Generating Station | 712.4 MW | CA | |
| Gateway Generating StationCurrent | 619.7 MW | CA | |
| James B Black | 168.6 MW | CA | |
| Humboldt Bay | 167 MW | CA | |
| Poe | 142.8 MW | CA | |
| Pit 5 | 141.6 MW | CA |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioThe CEC approved adding Pacific Gas and Electric Company as co-owner and operator with Mirant Delta, LLC.
Mirant and PG&E closed under the Asset Transfer Agreement, and PG&E became the sole owner of the project assets.
The CEC approved the order removing Mirant Delta as co-owner, confirming PG&E as sole owner, and changing the project name from Contra Costa Power Plant Unit 8 to Gateway Generating Station.
The CEC approved replacing the proposed San Joaquin River water cooling source and wet cooling tower with an air-cooled condenser and wet surface air cooler, along with related design changes.
The CEC approved two additional water tanks for the facility.
The CEC approved equipment and air-quality condition modifications in 2009, with additional air-quality-condition changes approved in 2011.
EIA-860 lists generator A, generator B, generator C with this operating date.
Gateway commenced commercial operation.
The CEC approved a 40,000-gallon water-storage tank in 2012, additional steam-turbine-deck decking in 2014, a fixed hydrogen tube bank in 2015, and a storm-water treatment system in 2016; these records do not identify a generation-capacity expansion.
The CEC docket lists the Annual Compliance Report for RY 2025 for PG&E Gateway Generating Station; the retrieved CEC record continues to identify the facility as operational and contains no identified retirement or repowering decision.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Gateway Generating Station reports 619.7 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.
Gateway Generating Station is a Natural Gas Fired Combined Cycle facility in Contra Costa County, CA, participating in the CAISO market.
Gateway Generating Station is in Contra Costa County, CA, inside the CAISO balancing area.
Gateway Generating Station is operated by Pacific Gas & Electric Co. according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Gateway Generating Station reports a commercial operation date of 2012. Current status: operating. Source: EIA Sep 2026.
Gateway Generating Station reported 2,354.1 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
Gateway Generating Station on the Pacific Gas and Electric Company (PG&E) system.
By capacity, Gateway Generating Station ranks #230 of 540 operating plants of the same technology nationally. It ranks #19 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.