USA, California:

Impact Sonoma: Mike Rogers, Calpine Geothermal Operations (North Bay Business Journal)

Mike Rogers
(Courtesy North Bay Business Journal)

Calpine is the largest operator of geothermal power plants at The Geysers, a 45-square-mile area in northern Sonoma County where ambient underground heat is close enough to the surface to generate steam from groundwater.

Calpine produces enough power there to satisfy the needs of San Francisco, or 60 percent of the needs of the North Coast. The North Bay Business Journal interviewed GRC member Mike Rogers, senior vice president of Calpine Geothermal Operations.

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