Funding Needed
$40 (Mio)
EB5 Funding
$40 (Mio)
EB-5 Investors
Investment Amount


Hydroelectric Power Generation


Raft River, Idaho


Last Update: February 04, 2015 01:00 PM

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Raft River geothermal project

Project Description

The Raft River geothermal project is now complete, with Unit 1 producing up to 10MW. Raft River is in southern Idaho, US, about 200 miles south-east of Boise, at a former US Department of Energy (DOE) geothermal site. US Geothermal plans to produce up to 36MW from the site.
US Geothermal acquired the project in 2002 and started construction in June 2006. The station started generating power in January 2008, selling it to Idaho Power Company under a 10MW Public Utility Regulatory Policies Act (PURPA) contract. US Geothermal has reserved 36MW of transmission on the adjacent 138kV transmission line.
In 2008 US Geothermal signed a 25-year power purchase agreement with Eugene Water and Electric Board for 16MW power in the planned Unit 2. Under the agreement US Geothermal will supply power to Bonneville Power Administration in Idaho.
In October 2008 the US DOE anounced a $9m grant to US Geothermal to implement enhanced geothermal systems (EGS) stimulation techniques at the Raft River site. DOE has awarded $7.39m of the total grants announced, in September 2009. Implementation of EGS will be performed to thermally stimulate the existing injection well and thus improve permeability of the geologic horizon that contains the reservoir of the Raft River. Work on the EGS began in February 2010.

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