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176.4 MW Geothermal operating in Lake, CA — California Independent System Operator
176.4 MW
Nameplate Capacity
2
Generators
units
Geothermal
Technology
1984
Operating Since
Coordinates
38.7879, -122.7434
County
Lake, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Geysers Power Co LLC | Geysers Power | — |
| Owner(s) | Geysers Power Co LLC | Geysers Power Co LLC | — |
| Status | Operating | operating | — |
GEM identifies the owner as Geysers Power Co LLC
This entity is not yet in the GEM ownership database — chain unavailable.
Calistoga Power Plant is a 176.4 MW geothermal facility located in Lake County, California. The plant, which began operating in 1984, is owned and operated by Geysers Power Co LLC. It utilizes geothermal energy as its primary fuel source and consists of two generators. The plant operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year with available data, Calistoga Power Plant generated 454,658 MWh of electricity, achieving a capacity factor of 29.4%. The plant holds the ranking of second-largest geothermal power plant in California out of four such plants, and it is the second-largest geothermal plant nationally out of seven.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
40.8K MWh
Latest Month
454.7K MWh
Annual Generation
29.4%
Capacity Factor
CO₂ Intensity
89 lb/MWh
NOx
0.001 lb/MWh
SO₂
2013
$2,851/kW
Est. Construction Cost
Total estimated cost: $502.9M
Point of Interconnection
Nearest Substation
Calistoga 199
Substation Distance
1.155 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
SMUDGEO1_2_N006
Pricing Hub
TH_NP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
Last updated 2026-03-14
View all 5 articlesNo ask pi reports yet for this entity.
ask pi about Calistoga Power PlantCalifornia Independent System Operator (CISO)
Grid Voltage
230.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
0.000 lb/MWh
CH₄
—
N₂O
—
Capacity Factor
30.6%
Annual Net Gen
473 GWh
CO₂eq
89 lb/MWh
Subregion
WECC California