Four Mile Hill
BrownfieldSiskiyou, California · Calpine Corporation
Four Mile Hill is a former geothermal site in Siskiyou, California. Retired generation sites are among the most attractive datacenter redevelopment targets: the existing interconnection was sized for roughly 50 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 Four Mile Hill, ranked by DC Readiness.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| Klamath Project | Federal Excess | OR | Klamath County | — | — | 6.9 yrs | 49.5 |
| BVMHS Mill - Log Pond & Log Deck | Industrial | CA | Siskiyou County | — | — | 8.2 yrs | 40.5 |
| BVMHS Mill - Equipment Shed | Industrial | CA | Siskiyou County | — | — | 8.2 yrs | 40.5 |
| BVMHS Mill - Equipment Shed | Industrial | CA | Siskiyou County | — | — | 8.2 yrs | 40.5 |
| Klamath Project | Federal Excess | CA | Siskiyou County | — | — | 8.2 yrs | 40.4 |
| UNKNOWN203343 | Substation-Adjacent | CA | Siskiyou County | 69 kV | 50 MW | 8.2 yrs | 40.2 |
| TAP203340 | Substation-Adjacent | CA | Siskiyou County | 69 kV | 50 MW | 8.2 yrs | 40.2 |
| DORRIS | Substation-Adjacent | CA | Siskiyou County | 69 kV | 50 MW | 8.2 yrs | 40.2 |
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 Four Mile Hill, Siskiyou, 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.