Geothermal Plant Integrates Water Recycling

Calpine Corporation’s Geysers Recharge Project is now in operation, providing up to 11 million gallons per day of recycled water originating from the City of Santa Rosa’s municipal water system. Water delivered through the 40-mile pipeline will help to extend the commercial life of Calpine’s Geysers geothermal resource.

San Jose, California – December 9, 2003 [] Located within a 30 square mile area straddling the Lake and Sonoma County border in Northern California, The Geysers is the world’s largest geothermal generation facility. First developed in the 1960’s, The Geysers operations have grown such that they now provide for the typical power needs of Sonoma, Lake, and Mendocino Counties, as well as a large portion of the demands of Marin and Napa Counties. “The Santa Rosa Geysers Recharge Project is an innovative and unique project that is truly a ‘win-win’ arrangement,” said Calpine Vice President Dennis Gilles. “By injecting recycled water into The Geysers steam reservoir, the City of Santa Rosa has found an environmentally sound discharge solution and is helping to promote green power production in California. There are few places on the planet where such a system could be implemented and the City of Santa Rosa is to be complemented for its vision and commitment to environmental stewardship.” Calpine’s ownership in power generation began with the purchase of a five percent interest in a 20 MW facility at The Geysers in 1989. Since then, Calpine has consolidated ownership of 19 of the 21 facilities within the geothermal resource area. As a result, Calpine said they are now the world’s largest private producer of electricity derived from geothermal resources. Calpine also operates a Geothermal Visitor Center in Middletown, California. The center offers free admission and tours of one of Calpine’s Geysers facilities.
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