Telephone Flat
BrownfieldSiskiyou, California · Calpine Corporation
Telephone Flat 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
Site conditions & market — Siskiyou County
County-level intelligence for this site's location — the power economics, water, hazard, connectivity, and workforce a developer screens before ever visiting. Assembled from FEMA NRI, BLS QCEW, FCC BDC, USGS water-use, and EIA.
Market & workforce
Power economics & interconnection
Water & cooling
Hazard, flood & connectivity
County-level context — address-level utility offerings and flood zoning vary within the county. Confirm site-specific service with the utility and a Phase I ESA.
Nearby brownfield & retired-generation sites
A proximity screen of other retired-plant, contaminated, and EPA-flagged sites near Telephone Flat — the environmental neighborhood, ranked by legacy grid capacity.
| Site | Former use | Legacy MW | Distance | Cleanup status |
|---|---|---|---|---|
| Four Mile Hill | former geothermal site | 50 | 3.8 mi | — |
Derived from GridCensus's retired-generator & EPA brownfield dataset. Not a substitute for an ASTM E1527 Phase I environmental radius report.
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Nearby datacenter candidate sites
Scored candidate sites near Telephone Flat, ranked by DC Readiness.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| UNKNOWN202617 | Substation-Adjacent | CA | Modoc County | 69 kV | 50 MW | 8.2 yrs | 44.3 |
| UNKNOWN202645 | Substation-Adjacent | CA | Modoc County | 69 kV | 50 MW | 8.2 yrs | 44.3 |
| TAP203354 | Substation-Adjacent | CA | Modoc County | 69 kV | 50 MW | 8.2 yrs | 44.2 |
| CLEAR LAKE | Substation-Adjacent | CA | Modoc County | 69 kV | 50 MW | 8.2 yrs | 44.1 |
| TAP308037 | Substation-Adjacent | CA | Modoc County | 69 kV | 50 MW | 8.2 yrs | 44.0 |
| TAP203353 | Substation-Adjacent | CA | Modoc County | 69 kV | 50 MW | 8.2 yrs | 43.9 |
| UNKNOWN202614 | Substation-Adjacent | CA | Modoc County | 69 kV | 50 MW | 8.2 yrs | 43.8 |
| BVMHS Mill - Log Pond & Log Deck | Industrial | CA | Siskiyou County | — | — | 8.2 yrs | 41.8 |
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 Telephone Flat, Siskiyou, California. Pro and Enterprise plans unlock the full 147,272-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.