Ameresco Ox Mountain
Landfill gas power plant in San Mateo County, California. 11.4 MW of nameplate capacity across 6 generators, operated by AMERESCO Ox Mountain Energy LLC.
Also known as EIA plant 56895
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 11.4 MWNameplate
- Generators
- 6 operatingEIA-860M, August 2026
- Operating since
- December 2008First generator online
- Operator
- AMERESCO Ox Mountain Energy LLCEIA operator ID 56101
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- San Mateo County, CA37.5000, −122.4000
- EIA plant ID
- 56895EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Ameresco Ox Mountain produces
Free · EIA-923Net generation, 2025
82.1 GWh
82,097 MWh, final
Capacity factor, 2025
82.2%
2024: 80.8%
January to July 2026
48.4 GWh
Provisional
Range, 2015 to 2025
80.3–88.1
GWh a year. Low 2015, high 2022
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | 77 | Not reported | 12 of 12 |
| 2009 | 73,725 | Not reported | 12 of 12 |
| 2010 | 86,935 | 87.1% | 12 of 12 |
| 2011 | 86,481 | 86.6% | 12 of 12 |
| 2012 | 89,725 | 89.6% | 12 of 12 |
| 2013 | 85,771 | 85.9% | 12 of 12 |
| 2014 | 89,078 | 89.2% | 12 of 12 |
| 2015 | 80,297 | 80.4% | 12 of 12 |
| 2016 | 85,387 | 85.3% | 12 of 12 |
| 2017 | 83,957 | 84.1% | 12 of 12 |
| 2018 | 85,173 | 85.3% | 12 of 12 |
| 2019 | 86,951 | 87.1% | 12 of 12 |
| 2020 | 80,554 | 80.4% | 12 of 12 |
| 2021 | 86,713 | 86.8% | 12 of 12 |
| 2022 | 88,124 | 88.2% | 12 of 12 |
| 2023 | 87,043 | 87.2% | 12 of 12 |
| 2024 | 80,885 | 80.8% | 12 of 12 |
| 2025 | 82,097 | 82.2% | 12 of 12 |
| 2026 (provisional, partial year) | 48,391 | 83.4% | 7 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 account · CAISOEmissions
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 |
|---|---|---|---|
| 1 | Landfill Gas | 1.9 | December 2008 |
| 2 | Landfill Gas | 1.9 | December 2008 |
| 3 | Landfill Gas | 1.9 | December 2008 |
| 4 | Landfill Gas | 1.9 | December 2008 |
| 5 | Landfill Gas | 1.9 | December 2008 |
| 6 | Landfill Gas | 1.9 | December 2008 |
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 AMERESCO Ox Mountain Energy LLC 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 Ameresco Ox Mountain
How much power does Ameresco Ox Mountain produce?
Ameresco Ox Mountain reported 82,097 MWh (82.1 GWh) of net generation in 2025, a 82.2% capacity factor on 11.4 MW of nameplate capacity. From January to July 2026 it reported 48.4 GWh, which is provisional.
Where is Ameresco Ox Mountain?
Ameresco Ox Mountain is in San Mateo County, California, at 37.5000, −122.4000. It is in the California Independent System Operator balancing area (CISO).
Who operates Ameresco Ox Mountain?
EIA-860M for August 2026 lists AMERESCO Ox Mountain Energy LLC as the operator (EIA operator ID 56101). The operator is not always the owner.
When did Ameresco Ox Mountain start operating?
Its first generator began operating in December 2008, according to EIA-860M.
Does InfraMap have power prices for Ameresco Ox Mountain?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Ameresco Ox Mountain, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
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)
- CAISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page