WGP Geysers Geothermal Project Secures Interconnection Agreement; PPA Pending

U.S. Geothermal Inc. recently said that it has reached a key milestone in the development of the WGP Geysers project with the completion of a large generator interconnection agreement (LGIA) for the WGP Geysers geothermal project with the California Independent System Operator (CAISO) and Pacific Gas & Electric.

The WGP Geysers project is located in Sonoma County, California, about 90 miles north of San Francisco, and is under development by U.S. Geothermal. According to the company, reservoir testing has determined that a steam resource capable of supporting a 30 MW power plant exists at the property.

U.S. Geothermal CEO Dennis Gilles said in a statement that the agreement allows the company to gain access to the transmission grid and provide a firm delivery date for negotiating a power purchase agreement.

According to the company, the LGIA provides for up to 35 MW of transmission capacity and allows for a commercial operations date of June 1, 2018. An engineering study completed by CAISO estimated the construction cost for the interconnection facilities to be $1.9 million, U.S. Geothermal said, adding that, in addition to the interconnection facilities, a 1.7-mile 115-kV transmission line will be required for the project. Pacific Gas & Electric will be responsible for construction of the interconnection facilities.

U.S. Geothermal said that it anticipates the WGP Geysers project will begin power sales by mid-2018, and the company is currently negotiating a power purchase agreement for the project.

Lead image: Milestone sign. Credit: Shutterstock.

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