The largest copper mine operating in the United States is the Bingham Canyon Mine, located in the Oquirrh Mountains just southwest of Salt Lake City, Utah. Often referred to locally as the Kennecott Copper Mine, this massive open-pit excavation has been in production for over a century and accounts for a significant share of domestic primary copper production, yielding substantial quantities of copper alongside valuable gold, silver, and molybdenum byproducts.