The chartered tour bus winds up the mountain, swings around switchbacks, and groans against the steep grade before pulling out on a ridgeline that workers call the North Slope, referring to how cold it gets in the winter when the wind blows. Right now the clouds rest below the tops of the surrounding mountains, dropping a mist that promises to turn into full-blown rain. Tim Conant, Calpine’s Director of Engineering, steps out of the bus first, followed by Danielle Matthews Seperas, Director of Government and Community Affairs. Both hunch their shoulders against the breeze and walk to the edge of the ridgeline. Just below, one of many geothermal power plants hums away, turning treated recycled water into electricity.
“When you flush a toilet in Clearlake Oaks, we pipe it up here and inject it,” Tim Conant explained earlier at the visitor’s center located in Middletown. He pointed at a large, lit model stretching across the wall. “We get about eight million gallons a day from Lake County and twelve and a half million from Santa Rosa.”