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Gridcensus

Wild Horse Power Plant

Brownfield

Middletown, Sonoma, California · Calpine Corporation

Legacy capacity
48
MW

Wild Horse Power Plant is a former geothermal site in Middletown, Sonoma, California. Retired generation sites are among the most attractive datacenter redevelopment targets: the existing interconnection was sized for roughly 48 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

Former useformer geothermal site
Site typeretired_plant
Existing capacity48 MW
EIA plant ID#57181

Grid hookup & remediation

Nearest substation1.4 mi
OperatorCalpine Corporation
Operator address10350 Socrates Mine Road, Middletown, CA, 95461
Why this site is datacenter-attractive: a former geothermal site of this scale leaves behind a high-capacity grid interconnection that a new load can re-use, frequently shaving years off the interconnection queue. Retired-plant sites also tend to be already zoned for heavy industrial use with established road, rail, and water infrastructure.

Nearby datacenter candidate sites

Scored candidate sites near Wild Horse Power Plant, ranked by DC Readiness.

Candidate sites near Wild Horse Power Plant
SiteTypeStateCountyVoltageCapacityQueue waitScore
OAKMONT NORTHSubstation-AdjacentCANapa County230 kV300 MW8.2 yrs50.7
FULTONSubstation-AdjacentCASonoma County230 kV300 MW8.2 yrs49.5
Wild Horse Power PlantBrownfieldCALake County115 kV48 MW5.7 yrs48.8
SOCRATES 19Substation-AdjacentCASonoma County230 kV300 MW8.2 yrs47.3
WEST FORD FLATSubstation-AdjacentCASonoma County230 kV300 MW8.2 yrs46.9
BEAR CANYONSubstation-AdjacentCASonoma County230 kV300 MW8.2 yrs46.8
MONROESubstation-AdjacentCASonoma County115 kV100 MW8.2 yrs46.6
RINCONSubstation-AdjacentCASonoma County115 kV100 MW8.2 yrs46.2

Nearby internet exchanges

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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 Wild Horse Power Plant, 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.

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