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Resolution Coppper Co. would give the federal government more than 5,300 acres in several areas of southeast Arizona in exchange for more than 2,400 acres it wants to mine near Superior, in Pinal County.

The House voted Wednesday to swap more than 2,400 acres of copper-rich federal land in Pinal County with a mining company, Resolution Copper, that plans to develop the third-largest undeveloped copper resource in the world. Read more»