MidAmerican Geothermal, a subsidiary of MidAmerican Renewables, is a Calipatria, California-based geothermal power producer. The company owns 10 geothermal facilities in California’s Imperial Valley that have the capacity to produce up to 327 megawatts. Its natural gas-fueled plants include a 537-megawatt plant in Illinois, a 240-megawatt plant in New York, a 212-megawatt plant in Texas and a 50-megawatt plant in Arizona.