The Cactus Mine (formerly the Sacaton Mine) is located at the convergence of three major geologic zones in western Pinal County, just west of Casa Grande. It was discovered 1961 by American Smelting and Refining Co. (ASARCO) which mined the site from 1972 to 1984. 400 people worked at the site which included surface and underground facilities. During its previous operation, the mine processed 32 million tons, with 398 million pounds of copper, 1.4 million ounces of silver and 30,000 ounces of gold from the West ore body.
In 1982, construction began on two production shafts to 1,800 ft depth and a headframe to the southwest of the pit to access the higher-grade ore via underground mining methods; however, development was suspended due to market conditions and in 1984.