https://en.wikipedia.org/wiki/Bingham_Canyon_Mine
WebThe Bingham Canyon Mine, more commonly known as Kennecott Copper Mine among locals, 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, which is considered to have …