SUPERIOR, Ariz. (AP) -- Outside of an aging mining town in the mountains east of Phoenix, a copper company has burrowed a shaft 1.3 miles into the high desert landscape in what is believed to be the deepest such mine in the U.S....
By RYAN VAN VELZER, Associated Press: Business
Wed, 07/01/2015 - 11:22pm
SUPERIOR, Ariz. (AP) -- Outside of an aging mining town in the mountains east of Phoenix, a copper company has burrowed a shaft 1.3 miles into the high desert landscape in what is believed to be the deepest such mine in the U.S....