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Morenci, Arizona. Bulldozer operator at one of the open-pit copper mines of the Phelps Dodge mining corporation
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Morenci, Arizona. View of the copper concentrating plant of the Phelps Dodge mining corporation
Morenci, Arizona. Ball mills in the concentrator plant of the Phelps Dodge mining corporation which grinds copper ore to small sizes
Morenci, Arizona. Ball mills in the concentrator plant of the Phelps Dodge mining corporation which grinds copper ore to small sizes