Geysers Unit 5-20
BrownfieldMiddletown, Sonoma, California · Geysers Power Co LLC
Geysers Unit 5-20 is a former geothermal site in Middletown, Sonoma, California, retired 2006-05-01. Retired generation sites are among the most attractive datacenter redevelopment targets: the existing interconnection was sized for roughly 110 MW of generation, so the grid hookup, transmission rights, and often cooling-water access are already in place — collapsing the speed-to-power timeline versus a greenfield build.
Former use & capacity
Grid hookup & remediation
Nearby datacenter candidate sites
Scored candidate sites near Geysers Unit 5-20, ranked by DC Readiness.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| OAKMONT SOUTH | Substation-Adjacent | CA | Napa County | 230 kV | 300 MW | 8.2 yrs | 50.9 |
| OAKMONT NORTH | Substation-Adjacent | CA | Napa County | 230 kV | 300 MW | 8.2 yrs | 50.7 |
| FULTON | Substation-Adjacent | CA | Sonoma County | 230 kV | 300 MW | 8.2 yrs | 49.5 |
| Wild Horse Power Plant | Brownfield | CA | Lake County | 115 kV | 48 MW | 5.7 yrs | 48.8 |
| OZ Sonoma | Greenfield | CA | Sonoma | — | — | 5.7 yrs | 47.9 |
| BELLVUE | Substation-Adjacent | CA | Sonoma County | 115 kV | 100 MW | 8.2 yrs | 47.7 |
| STONY POINT TAP | Substation-Adjacent | CA | Sonoma County | 115 kV | 100 MW | 8.2 yrs | 47.4 |
| SOCRATES 19 | Substation-Adjacent | CA | Sonoma County | 230 kV | 300 MW | 8.2 yrs | 47.3 |
Nearby internet exchanges
- X2nSat PetalumaPetaluma, CA · 0 networks
See all datacenter sites in California →
Dataset updated . Screening estimates derived from public data sources.
Brownfield attributes are derived from EIA retired-generator and EPA public data. Existing capacity reflects the retired plant's historical nameplate, not deliverable interconnection for a new load. Confirm reusable interconnection rights, remediation status, and site availability with the utility, ISO, and current owner.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for Geysers Unit 5-20, Middletown, Sonoma, California. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.