The gaping mouth of Resolution Copper Mining’s No. 10 shaft is 28 feet across and opens into a sheer drop of nearly 7,000 feet, making it the deepest continuous mine shaft in the United States.

Like many copper mining towns in Arizona, Ray was booming in its heyday. Ray — about 90 miles north of Tucson and 80 miles east of Phoenix — was the largest town in Pinal County in 1914 ...

A company planning to build a large copper mine in central Montana will need to construct a pond for treated wastewater in order to comply with state water quality rules. The Bozeman Daily ...

UNITY TOWNSHIP, Pa. — The team looking for a missing Pennsylvania woman believed to have fallen into a sinkhole has determined that an abandoned coal mine is too unstable for people to safely ...

The Escondida mine, in Chile. (Bloomberg) -- Workers at the world’s biggest copper mine voted to strike, overwhelmingly rejecting owner BHP Group’s final wage offer, in a move that will stoke ...