PHOENIX — A federal appeals court has halted efforts by Tucson-based Asarco LLC to obtain nearly 11,000 acres of federal land near the company's Ray Mine to expand its copper mining operations. In a ...
With copper prices surging, Tucson-based Asarco LLC is likely to expand two of its Southern Arizona mines. The Ray and Mission mines are the ones most likely to be expanded, a United Steelworkers ...
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