Boise-based U.S. Geothermal Inc. announced it will buy Ram Power Corp's geyser geothermal electricity operations in Sonoma County, Calif., for $6.4 million.
The purchase included Ram Power subsidiaries Western Geopower Inc., Skyline Geothermal Holdings Inc. and Etoile Holdings Inc. Those subsidiaries in turn own Mayacamas Energy LLC and Skyline Geothermal LLC.
U.S. Geothermal expects the sale to be final by April 30.
The Ram Power subsidiaries own operations in geothermal leases covering 3,809 acres in the largest geothermal field in the world, according to a U.S. Geothermal release. The geothermal field is located about 75 miles north of San Francisco.
The purchase bolsters the holdings of U.S. Geothermal, which generates and sells electricity derived from geothermal energy at Neal Hot Springs in Oregon as well as San Emidio, Nev. and Raft River in Idaho. The company is developing a project in Guatemala near Guatemala City.