Commercial geothermal power generation is an established industry both here in the U.S. and around the world. Italy was the first country to develop geothermal power commercially in 1914 at Larderello. This was followed by plants at Wairakei, New Zealand in 1958 and at the Geysers in California in 1960 (DiPippo, 1999). As indicated in table 1, the U.S. currently leads the world in geothermal power generation with a total of 2850 MW produced from 203 different plants. These plants are located in California, Nevada, Utah and Hawaii