In the early 2000s, the owners of the Mammoth Pacific geothermal station proposed expanding the plant into an area just east of California’s Yosemite National Park. The project boasted on its website in 2004 that the potential new wells, which would be located in one of the state’s richest heat resources, had been ​“carefully chosen to reduce or avoid potential environmental impacts.”

By 2009, the company had produced a study on how the development could impact plant life. The power station had been running since the 1980s, so the decades of data on its safe operation seemed to bode well for a swift approval at a moment when, much like today, rising electricity demand and concern over climate change were converging to bolster development of carbon-free power. The prospects looked so good that, in 2010, geothermal giant Ormat Technologies bought the company that owned Mammoth. In 2013 — a decade after the expansion was first conceived — federal regulators gave the project the green light.

Read more in Canary Media here.

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