 It was designated a National Historic Landmark in 1966 under the name Bingham Canyon Open Pit Copper Mine.The mine experienced a massive landslide in April 2013 and a smaller slide in September 2013.Minerals, in the form of copper ore, were first discovered in Bingham Canyon in 1848 by two brothers, Sanford and Thomas Bingham, sons of Erastus Bingham, latter-day saint pioneers of September 1847, who grazed their cattle there.