Four Mile Hill

♨ GeothermalIPP Non-CHP
Capacitynameplate
Annual GenerationEPA eGRID
Capacity Factor
Annual CO₂metric tons

Location

Plant NameFour Mile Hill
OperatorCalpine Corporation
CityN/A
CountySiskiyou County
StateCalifornia
ZIP96097
Coordinates41.60140, -121.62500

Generators (1)

IDTechnologyFuelCapacityStatusOnline
1GeothermalGeothermal49.9 MWCancelled

Grid context

NERC RegionWECC
Balancing AuthorityCalifornia Independent System Operator

What this means

Geothermal plants tap heat from underground reservoirs to spin steam turbines. They provide carbon-free baseload power with very high capacity factors, but they only work where hot rock is accessible — primarily in the western U.S.

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