San Manuel Mine was once the world’s largest underground copper mining operation in size of ore body, production capacity and infrastructure. It is located in the Old Hat mining district on the ...

A rush of proposals to mine the state’s famed “sky islands” with water drawn from overtaxed aquifers is drawing opposition ...

A mega cannabis operation could help the former mining town of San Manuel shed its Magma Copper reputation. The Phoenix-based dispensary chain The Flower Shop is betting it can grow some of the ...

“I hope I don’t have to fight for my life in the town that I was finally able to manage to buy a house in,” she said, adding that the San Manuel Copper Mine was once the world’s largest ...

Resolution Copper plans to dig four more shafts over ... He came home and eventually landed at a mine in San Manuel, about 40 miles north of Tucson. That mine used an underground block-caving ...