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Renewable Energy Western U.S. Geothermal Operations CalEnergy Generation operates 10 geothermal generating plants in Southern California's Imperial Valley, which produce electricity solely from naturally occurring steam. Production wells tap into superheated water reservoirs thousands of feet beneath the Earth's surface to release tremendous pressure, caused by the hot water, which rushes to the surface. There, steam is separated and used to drive turbines to generate electricity. Geothermal Virtual Tour Learn how the geothermal process works by taking a virtual tour of one of CalEnergy's geothermal plants. Hydropower Projects and Renewable Energy Commitment Learn more about PacifiCorp Energy’s hydropower projects, and PacifiCorp's commitment to renewable energy. For Your Home | For Your Business | Safety | Rates | Energy Efficiency | Economic Development | Environmental Efforts About Us | Careers | News Room | Storm Center | Wind Energy | Contact | Streetlight Repair Request | System Outage Watch | Energy Choice | For Contractors | For Landlords | ©2008 MidAmerican Energy Holdings Company. All rights reserved.