Geothermal 2
Sonoma County, California · EIA plant ID 7369 · Operator: Northern California Power Agny
Nameplate110MWSummer 65 MW
Generators2in service
Net generation325GWh12 mo to Aug 2026
Capacity factor57%geothermal units, summer MW
Heat rate—thermal plants only
First online1985
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), geothermal 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) |
|---|---|---|---|
| 2002 | 584.5 | 55.6% | — |
| 2003 | 516.4 | 91.4% | — |
| 2004 | 521.5 | 92.0% | — |
| 2005 | 415.7 | 43.6% | — |
| 2006 | 449.1 | 47.3% | — |
| 2007 | 468.7 | 90.4% | — |
| 2008 | 452.4 | 87.0% | — |
| 2009 | 431.9 | 83.3% | — |
| 2010 | 390.1 | 75.2% | — |
| 2011 | 422.8 | 81.5% | — |
| 2012 | 416.6 | 60.7% | — |
| 2013 | 365.2 | 53.4% | — |
| 2014 | 371.1 | 54.3% | — |
| 2015 | 366.4 | 53.6% | — |
| 2016 | 343.8 | 50.1% | — |
| 2017 | 355 | 56.2% | — |
| 2018 | 352.3 | 60.9% | — |
| 2019 | 331.2 | 57.3% | — |
| 2020 | 284.4 | 49.8% | — |
| 2021 | 314.8 | 55.3% | — |
| 2022 | 275.9 | 48.5% | — |
| 2023 | 198.9 | 34.9% | — |
| 2024 | 363.3 | 63.6% | — |
| 2025 | 321.7 | 56.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 3 | Geothermal | ST | 55 | 25 | Dec 1985 | Operating (Out of service) | — | coming soon |
| 4 | Geothermal | ST | 55 | 40 | May 1986 | Operating | — | coming soon |
Owner / operator
Operator: Northern California Power Agny. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Northern California Power Agny | 100.0% | 110 MW |
Nearby plants
Within 80 km.
| Geothermal 1 | 110 MW | 0.7 km |
| Bear Canyon | 13 MW | 2.2 km |
| Geysers Unit 5-20 | 1,236 MW | 4.2 km |
| West Ford Flat | 25 MW | 4.4 km |
| Calistoga Power Plant | 176 MW | 5.1 km |
| Sonoma California Geothermal | 78 MW | 6 km |