1932-1972
Anaconda Copper Mining Company split and sold the surface estate while retaining the Mineral Estate and then deeded buyback provisions conveyed by the original deeds. Since that time, the Mineral Estate has been owned, controlled, or in joint venture by some of the largest mining and exploration companies in the world i.e. Atlantic Richfield Company, BP Amoco, Western Energy Company, AddWest Gold Inc., Phelps Dodge Mining Company, and finally by Canyon Reserves.