Calistoga Power Plant
Geothermal power plant in Lake County, California. 176.4 MW of nameplate capacity across 2 generators, operated by Geysers Power Co LLC.
Also known as EIA plant 50066
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Key facts
- Capacity
- 176.4 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- March 1984First generator online
- Operator
- Geysers Power Co LLCEIA operator ID 7160
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Lake County, CA38.7879, −122.7434
- EIA plant ID
- 50066EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Calistoga produces
Free · EIA-923Net generation, 2025
455 GWh
454,658 MWh, final
Capacity factor, 2025
29.4%
2024: 30.3%
January to July 2026
260 GWh
Provisional
Range, 2015 to 2025
400.5–557.6
GWh a year. Low 2019, high 2016
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 533,532 | Not reported | 12 of 12 |
| 2001 | 529,841 | Not reported | 12 of 12 |
| 2002 | 589,454 | Not reported | 12 of 12 |
| 2003 | 590,342 | Not reported | 12 of 12 |
| 2004 | 594,584 | Not reported | 12 of 12 |
| 2005 | 555,078 | Not reported | 12 of 12 |
| 2006 | 581,323 | Not reported | 12 of 12 |
| 2007 | 581,899 | Not reported | 12 of 12 |
| 2008 | 555,134 | Not reported | 12 of 12 |
| 2009 | 493,338 | Not reported | 12 of 12 |
| 2010 | 538,765 | 34.9% | 12 of 12 |
| 2011 | 522,265 | 33.8% | 12 of 12 |
| 2012 | 536,435 | 34.6% | 12 of 12 |
| 2013 | 470,897 | 30.5% | 12 of 12 |
| 2014 | 490,053 | 31.7% | 12 of 12 |
| 2015 | 469,987 | 30.4% | 12 of 12 |
| 2016 | 557,649 | 36.0% | 12 of 12 |
| 2017 | 468,730 | 30.3% | 12 of 12 |
| 2018 | 500,756 | 32.4% | 12 of 12 |
| 2019 | 400,526 | 25.9% | 12 of 12 |
| 2020 | 468,902 | 30.3% | 12 of 12 |
| 2021 | 432,941 | 28.0% | 12 of 12 |
| 2022 | 535,772 | 34.7% | 12 of 12 |
| 2023 | 472,942 | 30.6% | 12 of 12 |
| 2024 | 468,760 | 30.3% | 12 of 12 |
| 2025 | 454,658 | 29.4% | 12 of 12 |
| 2026 (provisional, partial year) | 259,754 | 28.9% | 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 |
|---|---|---|---|
| UNT1 | Geothermal | 88.2 | March 1984 |
| UNT2 | Geothermal | 88.2 | March 1984 |
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 Geysers Power Co 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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Power plants near Calistoga
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Questions about Calistoga
How much power does Calistoga Power Plant produce?
Calistoga Power Plant reported 454,658 MWh (455 GWh) of net generation in 2025, a 29.4% capacity factor on 176.4 MW of nameplate capacity. From January to July 2026 it reported 260 GWh, which is provisional.
Where is Calistoga Power Plant?
Calistoga Power Plant is in Lake County, California, at 38.7879, −122.7434. It is in the California Independent System Operator balancing area (CISO).
Who operates Calistoga Power Plant?
EIA-860M for August 2026 lists Geysers Power Co LLC as the operator (EIA operator ID 7160). The operator is not always the owner.
When did Calistoga Power Plant start operating?
Its first generator began operating in March 1984, according to EIA-860M.
Does InfraMap have power prices for Calistoga Power Plant?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Calistoga Power Plant, 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