A federal judge in Arizona dismissed a lawsuit that sought to force the state's major water supplier to continue buying power from the Navajo Generating Station (NGS), a 2.25 gigawatt (GW) coal-fired power plant in Arizona.
NGS is the largest coal plant west of the Mississippi River. But in 2017, its owners decided they would close the plant by the end of 2019, as profits steadily eroded.
The Central Arizona Project (CAP), which buys millions of megawatt-hours of power a year from NGS to operate pumps that irrigate and hydrate higher-elevation portions of Arizona, said it would buy power elsewhere after NGS closed. CAP has maintained for several years (PDF) that coal-fired power from NGS has been more expensive than natural gas and renewable power on the wider market.