What family controlled the copper industry in the late 1800's?

In Butte, MT Willam Clark was one of 3 Copper Kings. He owned 47 mines locally compared to Marcus Daly who owned mines primarily in Anaconda and if memory serves Augustus Heinze only owned 3 mines. Mr Clark was born and had other interests in Pennsylvania but I am unfamiliar with his eastern business dealings. The Berkeley pit in Butte also provided over 90 percent of the copper for WWII if the local history is correct. If this is not what you needed maybe it will help you link into the right information.