Power plants at the Geysers are of the dry steam power plant type, where the steam directly powers the generator.[5] In general, the Geysers has 1517 MW[14] of active installed capacity with an average production factor of 63% (955 MW).[15]
Of nearly two dozen active plants in the Geysers in 2013, Calpine Corporation operated 19 plants in 2004[16] but only 15 in 2013.[17] Two other plants are owned jointly by the Northern California Power Agency and the City of Santa Clara's municipal Electric Utility (now called Silicon Valley Power). The Bottle Rock Power plant, owned by the U.S. Renewables Group, was reopened in 2007.[18] In July 2009, AltaRock Energy planned to drill more than 2 miles (3.2 km) down to create an "enhanced geothermal" project which was abandoned when federal agencies asked for review.[2] Another plant was under development by Ram Power Corporation, formerly Western Geopower, in 2010, but after Ram Power lost both its CEO and CFO in 2013, it was seeking a buyer for its Geysers property.[1