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<br />w <br />.... <br /> <br /> <br />o <br />Q <br />N <br />'..... <br />C> <br />(;!:) <br /> <br />Mineral Prod~ction--necessary for the Nation's welfare and a major contributor to the Region's <br />economy. About 60 percent of the Nation's copper is taken from open-pit ridnes located in the <br />Lower Colorado Region. <br /> <br />