The Geysers, situated in the Mayacamas Mountains, is the largest geothermal electrical operation in the world. The first exploratory well was drilled there in 1920, with the first modern well being drilled in 1955. In 1960 the first commercial geothermal electricity production began.
Since the first production well, there have been 400 geothermal wells drilled and 28 power plants in use. The height of The Geysers geothermal production was in 1987.
Throughout The Geysers’ long history, many power plants have consolidated, and now Calpine has 13 power plants which provide 350 jobs.
The Geysers produces 21 percent of California's renewable energy, and about 60 percent of the electricity needed from San Francisco's Golden Gate Bridge all the way to Oregon.
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