Geothermal expansion at The Geysers, already biggest in the world

The Geysers in northern California is planning a $700 million expansion, to add 98 new MW of geothermal power.

The Geysers is [already] the single largest geothermal operation in the world, producing up to 725 megawatts of green energy around the clock — enough electricity to power the entire city of San Francisco.