ASARCO Ray Mine in Kearny, Arizona
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View operations at Asarco's Ray Mine in Kearny, about 60 miles north of Tucson.
As featured on
Copper company intends to impose its last offer on workers, Steelworkers say.
The district still includes a scattered group of mines.
Freeport-McMoRan announces the closure as part of several cost-saving moves.
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