Aera San Ardo Cogen Facility
Natural gas power plant in Monterey County, California. 3.2 MW of nameplate capacity across 1 generator, operated by Aera Energy LLC-San Ardo.
Also known as EIA plant 55184
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 3.2 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- July 1989First generator online
- Operator
- Aera Energy LLC-San ArdoEIA operator ID 24536
- Grid
- CAISOBalancing authority CISO
- Price nodes
- None linkedNo verified ISO node
- Location
- Monterey County, CA35.9533, −120.8600
- EIA plant ID
- 55184EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Aera San Ardo Cogen Facility produces
Free · EIA-923Net generation, 2025
19.6 GWh
19,556 MWh, final
Capacity factor, 2025
Not reported
2024: 31.7%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
7.1–49.0
GWh a year. Low 2021, high 2018
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 49,011 | Not reported | 12 of 12 |
| 2002 | 51,996 | Not reported | 12 of 12 |
| 2003 | 50,109 | Not reported | 12 of 12 |
| 2004 | 50,964 | Not reported | 12 of 12 |
| 2005 | 49,456 | Not reported | 12 of 12 |
| 2006 | 47,849 | Not reported | 12 of 12 |
| 2007 | 46,833 | Not reported | 12 of 12 |
| 2008 | 45,526 | Not reported | 12 of 12 |
| 2009 | 40,192 | Not reported | 12 of 12 |
| 2010 | 45,980 | 84.7% | 12 of 12 |
| 2011 | 48,643 | 89.6% | 12 of 12 |
| 2012 | 44,307 | 81.4% | 12 of 12 |
| 2013 | 49,075 | 90.4% | 12 of 12 |
| 2014 | 50,072 | 92.2% | 12 of 12 |
| 2015 | 41,263 | 76.0% | 12 of 12 |
| 2016 | 48,917 | 89.8% | 12 of 12 |
| 2017 | 47,553 | 87.6% | 12 of 12 |
| 2018 | 49,041 | 90.3% | 12 of 12 |
| 2019 | 47,904 | 88.2% | 12 of 12 |
| 2020 | 26,078 | 47.9% | 12 of 12 |
| 2021 | 7,062 | 13.0% | 12 of 12 |
| 2022 | 22,282 | 41.0% | 12 of 12 |
| 2023 | 23,649 | 43.5% | 12 of 12 |
| 2024 | 17,238 | 31.7% | 12 of 12 |
| 2025 | 19,556 | Not reported | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| UN-B | Natural Gas Fired Combustion Turbine | 3.2 | July 1989 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Aera Energy LLC-San Ardo as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about Aera San Ardo Cogen Facility
How much power does Aera San Ardo Cogen Facility produce?
Aera San Ardo Cogen Facility reported 19,556 MWh (19.6 GWh) of net generation in 2025.
Where is Aera San Ardo Cogen Facility?
Aera San Ardo Cogen Facility is in Monterey County, California, at 35.9533, −120.8600. It is in the California Independent System Operator balancing area (CISO).
Who operates Aera San Ardo Cogen Facility?
EIA-860M for August 2026 lists Aera Energy LLC-San Ardo as the operator (EIA operator ID 24536). The operator is not always the owner.
When did Aera San Ardo Cogen Facility start operating?
Its first generator began operating in July 1989, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page