Coldwater Creek Geothermal Power Plant and Steam Field Closure

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Due to aging infrastructure and inefficiency, the Central California Power Agency decided to close the Lake County, California, Coldwater Creek geothermal power plant. As the first major power plant closure considered by California's State Energy Commission, the project required extensive documentation and public discussion.

Working with the Central California Power Agency, ESA prepared environmental studies for closing the two-generator Coldwater Creek geothermal power plant, including 230-kilovolt transmission lines, well pads, and related facilities. Environmental studies focused on habitat restoration; erosion and sediment generation; potential species impacts; and traffic, air quality, and socioeconomic effects. ESA also developed a long-term solution to a major erosion problem in the well field. ESA continues to conduct regular aquatic monitoring studies in a nearby creek.

ESA helped the state plan for its first major power facility closure in California, and the restoration of 1,500 acres for a decommissioning application.

Specialized Services

  • Air quality assessments
  • Environmental scoping meetings
  • Geological and soils investigations
  • Habitat restoration and enhancement
  • Sediment transport studies
  • Special status species surveys and inventories
  • Traffic and parking studies