Aidlin Geothermal Power Plant — Plant Summary
- EIA Plant ID
- 52158
- Capacity
- 25 MW
- Primary Fuel
- Geothermal
- Technology
- Geothermal
- Status
- Operating
- Location
- Sonoma, CA
- Operating Since
- 1989
- Generators
- 2
- Operator
- Geysers Power Co LLC
- Parent Company
- —
- Annual Generation
- 81,307 MWh
- Capacity Factor
- 37.0%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Aidlin Geothermal Power Plant
OperatingGeothermal
Ranked #23 of 33 Geothermal plants in CA#47 of 70 nationally
25 MW Geothermal operating in Sonoma, CA — California Independent System Operator
EIAGEMWD
25 MW
Nameplate Capacity
2
Generators
units
Geothermal
Technology
1989
Operating Since
Location
Coordinates
38.8339, -122.8810
County
Sonoma, CA
Nearby Plants
- Bottle Rock PowerGeothermal55 MW · 9.8 km
- ASTISolar1.2 MW · 11.5 km
- Sonoma California GeothermalGeothermal78 MW · 11.9 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Geysers Power Co LLC | Geysers Power Co LLC [100%] | — |
| Owner(s) | Geysers Power Co LLC | Geysers Power Co LLC [100%] | — |
| Status | Operating | operating | — |
Ownership Chain
GEM identifies the owner as Geysers Power Co LLC [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
The Aidlin Geothermal Power Plant is a 25 MW geothermal facility located in Sonoma County, California. It began operating in 1989 and is owned and operated by Geysers Power Co LLC. The plant utilizes two generators to convert geothermal energy into electricity. It is connected to the California Independent System Operator (CAISO) balancing authority within the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year of data, the Aidlin Geothermal Power Plant generated 81,307 MWh of electricity, achieving a capacity factor of 37.0%. Aidlin is the 23rd largest geothermal plant in California out of 33, and the 46th largest in the United States out of 70.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
115 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
8.1K MWh
Latest Month
81.3K MWh
Annual Generation
37.0%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
LOW confidencePoint of Interconnection
Nearest Substation
Eagle Rock Substation · 115 kV
Substation Distance
< 10 km
Operator
Pacific Gas and Electric Company
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
—
Pricing Hub
TH_NP15_GEN-APND
Node Source
OSM spatial match
Substation identified. Node ID not yet resolved against ISO roster.
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