MAYACAMAS GEOTHERMAL
53 MW generation in Sonoma, CA · In queue since April 2021 · Proposed COD October 2030
53 MW
Capacity
1
Components
Geothermal
5y 1m
In Queue
System Impact Study
IA Status
COD target: 2030
Total Duration
9y 6m
Interconnection request submitted to ISO/RTO
CAISO uses cluster studies where projects are batched annually and studied together.
Typical: 36–48 months (IR to IA)
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2030-10-19
The MAYACAMAS GEOTHERMAL project is a proposed 53 MW geothermal generation project located in Sonoma County, California. The project is listed in the CAISO interconnection queue as entry CAISO-1859, with a queue entry date of April 15, 2021. The proposed commercial operation date is October 19, 2030. The project's interconnection status is currently in the System Impact Study phase.
The project is being proposed for interconnection with Pacific Gas & Electric (PGAE) at the Geysers #3-Cloverdale 115 kV Line point of interconnection. The MAYACAMAS GEOTHERMAL project has been mentioned in recent news coverage related to the energy industry.
Generated from interconnection queue and public data sources
State
CA
County
Sonoma
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
PGAE
Entity
CAISO
Service Type
—
Point of Interconnection
Geysers #3-Cloverdale 115 kV Line
Data Source
LBNL + Live
- ISO / RTO
- CAISO
- Trading Hub
- TH_ZP26_GEN-APND
- Hub Confidence
- LOW
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
Last updated 2026-03-26
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