The Bingham Canyon Mine, more commonly known as Kennecott Copper Mine among locals,[3] is an open-pit mining operation extracting a large porphyry copper deposit southwest of Salt Lake City, Utah, in the Oquirrh Mountains. The mine is the largest man-made excavation, and deepest open-pit mine in the world,[4][5] which is considered to have produced more copper than any other mine in history – more than 19 million tons.[5] The mine is owned by Rio Tinto Group, a British-Australian multinational corporation. The copper operations at Bingham Canyon Mine are managed through Kennecott Utah Copper Corporation which operates the mine, a concentrator plant, a smelter, and a refinery. The mine has been in production since 1906, and has resulted in the creation of a pit over 0.75 miles (1,210 m) deep,[5] 2.5 miles (4 km) wide, and covering 1,900 acres (3.0 sq mi; 7.7 km2). It was designated a National Historic Landmark in 1966 under the name Bingham Canyon Open Pit Copper Mine[...]
Kennecott's Bingham Canyon Mine is the largest artificially made excavation in the world, and is visible to the naked eye from an orbiting space shuttle.