FLAGSTAFF, Ariz. (AP) — A massive coal-fired power plant that served customers in the West for nearly 50 years shut down Monday, the latest closure in a shift away from coal and toward renewable energy and cheaper power. The Navajo Generating Station near the Arizona-Utah line was expected to shutter by the end of the year, but the exact day hadn’t been certain as the plant worked to deplete a stockpile of coal. It stopped producing electricity shortly after noon Monday when shift supervisor Fred Larson, a 41-year employee, put the plant permanently offline. “It will be hard for people because for employees, there’s a lot of pride, a lot of passion for their work, and they have put their heart and soul in this plant,” said Paul Ostapuk, who oversees safety and environment at the plant. The 2,250-megawatt, three-unit plant was one of the largest in the U.S.