The Oquirrh Mountains have been mined for gold, silver, lead, and most famously for copper, as home of the porphyry copper deposit at Bingham Canyon Mine, one of the world's largest open pit mines. As seen from Salt Lake City, the view of the mountain range is dominated by the displaced rock material (known as overburden) dug from the Kennecott mine. At the north end of the range is Kennecott's smelter complex which refines ore concentrates from the mine into useful metals. Dark colored tailings from past metal refining at the complex can be observed from the adjacent freeway, I-80. The value of the minerals taken from the range has been estimated to far exceed the combined value of those taken in the California, Nevada, and Klondike gold and silver rushes.