Ameresco Ox Mountain
San Mateo County, California · EIA plant ID 56895 · Operator: AMERESCO Ox Mountain Energy LLC
3 MW planned (Landfill Gas), first expected Sep 2027 · EIA-860M
Nameplate11MWSummer 11 MW
Generators6in service
Net generation83GWh12 mo to Aug 2026
Capacity factor88%other units, summer MW
Heat rate—thermal plants only
First online2008
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), other units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2008 | 0.1 | 1.0% | — |
| 2009 | 73.7 | 77.9% | — |
| 2010 | 86.9 | 91.9% | — |
| 2011 | 86.5 | 91.4% | — |
| 2012 | 89.7 | 94.6% | — |
| 2013 | 85.8 | 90.7% | — |
| 2014 | 89.1 | 94.2% | — |
| 2015 | 80.3 | 84.9% | — |
| 2016 | 85.4 | 90.0% | — |
| 2017 | 84 | 88.7% | — |
| 2018 | 85.2 | 90.0% | — |
| 2019 | 87 | 91.9% | — |
| 2020 | 80.6 | 84.9% | — |
| 2021 | 86.7 | 91.7% | — |
| 2022 | 88.1 | 93.2% | — |
| 2023 | 87 | 92.0% | — |
| 2024 | 80.9 | 85.3% | — |
| 2025 | 82.1 | 86.8% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Landfill Gas | IC | 1.9 | 1.8 | Dec 2008 | Operating | — | coming soon |
| 2 | Landfill Gas | IC | 1.9 | 1.8 | Dec 2008 | Operating | — | coming soon |
| 3 | Landfill Gas | IC | 1.9 | 1.8 | Dec 2008 | Operating | — | coming soon |
| 4 | Landfill Gas | IC | 1.9 | 1.8 | Dec 2008 | Operating | — | coming soon |
| 5 | Landfill Gas | IC | 1.9 | 1.8 | Dec 2008 | Operating | — | coming soon |
| 6 | Landfill Gas | IC | 1.9 | 1.8 | Dec 2008 | Operating | — | coming soon |
| 7 | Landfill Gas | IC | 3 | 2.8 | planned Sep 2027 | Planned | — | coming soon |
Owner / operator
Operator: AMERESCO Ox Mountain Energy LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| AMERESCO Ox Mountain Energy LLC | 100.0% | 11 MW |
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