Marathon Bay Area Cogen
550 Solano Way, Martinez, CA 94553Plant Summary Information
Marathon Bay Area Cogen is ranked #35 out of 342 natural gas power plants in California in terms of total annual net electricity generation.
Marathon Bay Area Cogen is comprised of 3 generators and generated 153.8 GWh during the 3-month period between July 2025 to October 2025.
| Plant Name | Marathon Bay Area Cogen |
|---|---|
| Utility Name | Tesoro Marketing & Refining Co. LLC (Martinez) |
| Location | Contra Costa County, CA |
| Initial Operation Date | February 1987 |
| Last Update | Oct 2025 |
| Annual Generation | 603.7 GWh |
| Annual Consumption | 7.3 M MMBtu |
| Ranked #1,132 out of 12,553 Power Plants Nationwide | |
| Ranked #524 out of 2,243 Natural Gas Power Plants Nationwide | |
| Ranked #65 out of 1,601 California Power Plants | |
| Ranked #35 out of 342 California Natural Gas Power Plants | |
| Fuel Types | Natural Gas |
| Previous Operator |
Foster Wheeler Power Sys Inc (2013 to 2020) Tesoro Marketing & Refining Co. LLC (Martinez) (2021 to 2024) |
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Monthly Net Generation for Marathon Bay Area Cogen
Marathon Bay Area Cogen Details
| Summary Information | |
|---|---|
| Plant Name | Marathon Bay Area Cogen (10342) |
| Plant Address | 550 Solano Way, Martinez, CA 94553 |
| Utility | Tesoro Marketing & Refining Co. LLC (Martinez) (65130) |
| Latitude, Longitude | 38.0244, -122.0589 |
| Generation Dates on File | Jan 2001 to Oct 2025 |
| Initial Operation Date | February 1987 |
| Annual Generation | 603.7 GWh |
| Fuel Types | Natural Gas |
| Federal Energy Regulatory Commission (FERC) Information | |
| FERC Cogeneration Status | Yes |
| FERC Cogeneration Docket Number | 85-302-000 |
| FERC Small Power Producer Status | No |
| FERC Exempt Wholesale Generator Status | No |
| Regulatory Information | |
|---|---|
| Regulatory Status | Non-Regulated |
| NERC Region | WECC |
| Balancing Authority | California Independent System Operator (CISO) |
| NAICS Code | Utilities (22) |
| Sector | IPP CHP (3) |
| Water Source | Wells |
| Ash Impoundment | No |
| Transmission / Distribution Owner | Pacific Gas & Electric Co (14328) CA |
| Grid Voltage | 230.00 kV |
| Energy Storage | No |
| Natural Gas Information | |
| Pipeline Name | PACIFIC GAS |
| Natural Gas Storage | No |
Generator TG1 Details Operating February 1987
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Combustion Turbine Part |
| Unit Code | CC1 |
| Ownership | Wholly Owned by Other Entity |
| Can Bypass Heat Recovery Steam Generator | No |
| RTO ISO LMP Node Designation | FOSTERW_7_N004 |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | TH_NP15_GEN-APND |
| Nameplate Capacity | 40 MW |
| Nameplate Power Factor | 0.85 |
| Summer Capacity | 35 MW |
| Winter Capacity | 37 MW |
| Minimum Load | 29 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | February 1987 |
| Combined Heat & Power | Yes |
| Sector Name | IPP CHP (3) |
| Topping Or Bottoming | T |
| Energy Source | Natural Gas |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 12H |
| Multiple Fuels | No |
| Cofire Fuels | No |
| Switch Between Oil And Natural Gas | No |
Generator TG2 Details Operating February 1987
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Combustion Turbine Part |
| Unit Code | CC1 |
| Ownership | Wholly Owned by Other Entity |
| Can Bypass Heat Recovery Steam Generator | No |
| RTO ISO LMP Node Designation | FOSTERW_7_N004 |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | TH_NP15_GEN-APND |
| Nameplate Capacity | 40 MW |
| Nameplate Power Factor | 0.85 |
| Summer Capacity | 35 MW |
| Winter Capacity | 37 MW |
| Minimum Load | 29 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | February 1987 |
| Combined Heat & Power | Yes |
| Sector Name | IPP CHP (3) |
| Topping Or Bottoming | T |
| Energy Source | Natural Gas |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 12H |
| Multiple Fuels | No |
| Cofire Fuels | No |
| Switch Between Oil And Natural Gas | No |
Generator TG3 Details Operating February 1987
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Steam Part |
| Unit Code | CC1 |
| Ownership | Wholly Owned by Other Entity |
| Duct Burners | No |
| RTO ISO LMP Node Designation | FOSTERW_7_N004 |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | TH_np15_GEN-APND |
| Nameplate Capacity | 33.5 MW |
| Nameplate Power Factor | 0.8 |
| Summer Capacity | 33.5 MW |
| Winter Capacity | 33.5 MW |
| Minimum Load | 5 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | February 1987 |
| Combined Heat & Power | Yes |
| Sector Name | IPP CHP (3) |
| Topping Or Bottoming | T |
| Energy Source | Natural Gas |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 12H |
| Multiple Fuels | No |
| Cofire Fuels | No |
| Switch Between Oil And Natural Gas | No |
Marathon Bay Area Cogen Plant Owners
| Owner Name | Address | Generator | Ownership |
|---|---|---|---|
| Tesoro Refining and Marketing Co LLC | 19100 Ridgewood Parkway, San Antonio, TX 78259 | Generator TG1 | 100.00% |
| Tesoro Refining and Marketing Co LLC | 19100 Ridgewood Parkway, San Antonio, TX 78259 | Generator TG2 | 100.00% |
| Tesoro Refining and Marketing Co LLC | 19100 Ridgewood Parkway, San Antonio, TX 78259 | Generator TG3 | 100.00% |
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Nearby Power Plants
Below are closest 20 power plants surrounding Marathon Bay Area Cogen.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| Ameresco Keller Canyon | Bay Point, CA | 19.1 GWh | 6.9 mi |
| American Canyon Solar | American Canyon, CA | 6.9 GWh | 12.7 mi |
| Bio-Rad | Hercules, CA | 3.2 GWh | 11.7 mi |
| C&H Sugar Plant | Crockett, CA | 32.2 GWh | 9 mi |
| CCCSD Wastewater Treatment Plnt | Martinez, CA | 18.7 GWh | 1.9 mi |
| Columbia Solar Energy, LLC | Pittsburg, CA | 18.7 GWh | 10.6 mi |
| Crockett Cogen Project | Crockett, CA | 1.2 TWh | 8.8 mi |
| Delta Energy Center | Pittsburg, CA | 3.3 TWh | 11.7 mi |
| EDF Renewable Windfarm V Inc | Birds Landing, CA | 20.2 GWh | 13.8 mi |
| Lake Herman | Benicia, CA | 13.0 GWh | 6.7 mi |
| Los Medanos Energy Center | Pittsburg, CA | 2.6 TWh | 10.1 mi |
| Martinez Refining | Martinez, CA | 759.5 GWh | 2.9 mi |
| Martinez Sulfuric Acid Regeneration Plt | Martinez, CA | 17.3 GWh | 3 mi |
| P66 Rodeo Solar | Rodeo, CA | 37.6 GWh | 10.3 mi |
| Phillips 66 Rodeo Refinery | Rodeo, CA | 291.0 GWh | 10.9 mi |
| Potrero Hills Energy Producers | Suisun City, CA | 58.7 GWh | 14 mi |
| SFDK Solar | Vallejo, CA | 10.2 GWh | 12 mi |
| Shiloh I Wind Project | Rio Vista, CA | 389.6 GWh | 13.1 mi |
| Shiloh IV Wind Project LLC | Birds Landing, CA | 278.3 GWh | 13.6 mi |
| Valero Refinery Cogeneration Unit 1 | Benicia, CA | 276.1 GWh | 5.6 mi |