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To establish a copper mine, Resolution Copper must get congressional approval for swapping parcels elsewhere in Arizona for about 2,400 acres in and around Oak Flat, which lies in the Pinal Mountains just east of Superior.

The House is taking up an Arizona land swap that would trade thousands of acres of federal land in Pinal County for thousands more owned by Resolution Copper throughout southeastern Arizona - the 10th try in the last six years. Read more»