Renewable Energy Fund Acquires Geothermal Assets

June 14, 2006 Los Angeles, California [] US Renewables Group, LLC (USRG), Riverstone Holdings LLC and The Carlyle Group announced that Carlyle/Riverstone Renewable Energy Infrastructure Fund I (CRREIF) has agreed to acquire from USRG a significant stake in the Bottle Rock Power LLC, a California-based company whose principal asset is a 55-megawatt (MW) geothermal power station in the Geysers in Lake County