In Arizona alone, the Department of Environmental Quality estimates that between 40,000 and 100,000 abandoned mines could be scarring the landscape, although a full inventory has never been completed.
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The Moss gold mine is an open pit heap leach operation located in the historic Oatman District in western Arizona. The operation is currently at limited capacity during the Bankruptcy Process ...
Arizona lawmakers touted significant direct and indirect economic benefits of adding copper to the USGS list. Five of the nation’s biggest copper mines are in Arizona, all run by Freeport-McMoRan.