The Colon crushing plant repalced the old crushers high on the hill.
From the mine, some "copper leachable ore (containing copper-oxide minerals) is placed directly on lined leach pads where a weak acid solution is sprayed on the surface of the heap. This solution percolates down through the pile of ore and dissolves the acid-soluble sopper. The copper bearing solutions are collected and pumped to a solvent extraction plant where organic chemicals remove the copper from the solution. The resulting electrolyte solution is transferred to the electrowinning process where copper is plated out as a 99.99% pure copper cathode." Arizona Mining Association.