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The Raft River Geothermal Project, Southern Idaho, USA

Construction began

June 2006

Construction completed

January 2008

Start of operation

January 2008


Unit 1 is 10MW (up to 36MW planned, 110MW maximum)

Plant type



Southern Idaho

Plant owner

US Geothermal

Main contractor

Ormat Nevada supplied major pumps, electrical components and other equipment

Geothermal estimates

GeothermEx Inc.

Power line

Raft River Rural Electric Coop

Power purchaser

Idaho Power Company


Rankine cycle, binary-cycle power plant


Geothermal energy, 150°C hot water at depths between 1,500 to 2,000m

Other equipment

Control room, control centre, switchgear, cooling tower, demisters, transformers, conductors

Electrical transmission

138kV Transmission Line

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