(Susan Montoya Bryan | AP file photo) This Aug. 20, 2019, file photo, shows the coal stockpile at the Navajo Generating Station near Page, Ariz. Coal-fired power plants and mines have been huge economic drivers in the Four Corners region for decades. The Navajo Generating Station near Page and its feed mine shut down last year. The San Juan Generating Station near Farmington, N.M., is scheduled to shutter in 2022 and the nearby Four Corners Power Plant in 2031.