OULDER CITY, Nev. — A transformer exploded Tuesday at Hoover Dam, one of the nation's largest hydroelectric facilities, producing a thick cloud of black smoke and flames that were quickly extinguished.
No one was hurt in the explosion near the base of the dam, an engineering marvel on the Colorado River that straddles the border of Arizona and Nevada. Electricity produced at Hoover Dam continued flowing to the 8 million people in Arizona, Nevada and Southern California who rely on it, the Western Area Power Administration said.
