The Morenci Mine is the largest copper mine in the US and one of the biggest in the world. As of 2007, operations ran around ...

During that time, he amassed a fortune of more than $12 million through his many business ventures, including the Sierra Madre Land and Lumber Co., which supplied lumber to the Cananea Mines.

Sen. William Andrews Clark, a copper magnate from Montana, is credited with having developed the United Verde Mine in the late 1880s. He acquired the mine when copper prices had dropped and ...