U.S. Geothermal Inc.
OTC Bulletin Board : UGTH

U.S. Geothermal Inc.

November 28, 2007 09:02 ET

U.S. Geothermal Resumes Power Plant Test Phase at Raft River

BOISE, IDAHO--(Marketwire - Nov. 28, 2007) - U.S. Geothermal Inc. ("U.S. Geothermal") (TSX:GTH)(OTCBB:UGTH), a renewable energy company focused on the production of electricity from geothermal energy, announced today that the company's Unit One geothermal power plant at Raft River, Idaho resumed start up operations on Sunday, November 25th.

The two mechanical problems found when the Raft River power plant was shut down on October 23rd have been repaired. The two injection pumps were repaired and modified by the manufacturer to improve the attachment of the impellors to the pump shaft. The high-pressure turbine was dismantled and repaired by Ormat Nevada Inc.

The plant originally commenced the test phase of power production on October 18th and operated over a six-day period until October 23rd, during which time it ran for 108 hours and generated a total of 1,022 gross megawatt-hours of electrical power. On October 21st the plant operated for 24 hours and produced a peak output of 13.2 megawatts. The first revenue from the test run has been received from Idaho Power Company.

The plant will now continue an approximate sixty to ninety-day start-up and testing phase during which time all generated electricity is being sold. Plant operations are being scheduled to allow for operator training, equipment testing and for Ormat Nevada Inc. to complete power plant performance testing and other completion obligations.

Full commercial power generation is still expected toward the end of the 4th quarter of 2007.

About U.S. Geothermal:

U.S. Geothermal is a renewable energy development company that is operating a geothermal power project at Raft River, Idaho and developing Neal Hot Springs in eastern Oregon. U.S. Geothermal holds, through ownership or lease, geothermal rights of lands that comprise the Raft River Neal Hot Springs projects.

The information provided in this news release may contain forward-looking statements within the definition of the Safe Harbor provisions of the US Private Securities Litigation Reform Act of 1995, including statements regarding potential energy resources and projects, development possibilities for Raft River and Neal Hot Springs. These statements are based on U.S. Geothermal Inc.'s current expectations and beliefs and are subject to a number of risks and uncertainties that can cause actual results to differ materially from those described. Readers are cautioned to review the risk factors identified by the company in its filings with Canadian and US securities agencies. Forward-looking statements are based on management's expectations, beliefs and opinions on the date the statements are made. U.S. Geothermal Inc. assumes no obligation to update forward-looking statements if management's expectations, beliefs, or opinions, or other factors, should change.

The TSX and OTC Bulletin Board Exchanges do not accept responsibility for the adequacy of this release.

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