DOE/EA-1733: Final Environmental Assessment

Analyzes an enhanced geothermal system demonstration project in Sonoma County.v

Office of NEPA Policy and Compliance

June 1, 2010

Geysers Power Corporation (aka Calpine) Northwest Geysers Enhanced Geothermal System Demonstration Project; Sonoma County, California

DOE issued final DOE/EA-1733, which analyzed the potential environmental impacts of providing federal funding to Geysers Power Corporation to support the construction and operation of an enhanced geothermal system demonstration project in Sonoma County, California.

For more information, see Geysers Power Corporation (aka Calpine) Northwest Geysers Enhanced Geothermal System Demonstration Project.

  • Calpine Enhanced Geothermal Systems Project, DOE/EA-1733 (June 2010) (20.67 MB)
    The proposed EGS project includes the injection of water, ranging from 50 to 80 degrees Fahrenheit, into wells to enhance the permeability of an existing high temperature hydrothermal reservoir that would be harnessed to produce electrical energy. The purpose of the project is to demonstrate the ability to stimulate high temperature rocks by monitoring their early response to carefully designed injection tests. The project would be a collaborative effort between scientists and engineers of Calpine Corporation, Lawrence Berkeley National Laboratory (LBNL), and the DOE. The proposed project includes the following phases