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Large-scale open pit gold mining began at Cripple Creek & Victory Gold Mining Company's Cresson Mine and by 2003 had produced 1.62 million gold ounces. [8] The Cripple Creek district has been the largest producer of gold in the state, with more than 22 million ounces mined. [6] 1991 gold Rio Grande County
The Cripple Creek & Victor Gold Mining Company began the first large-scale open pit mining in the district in 1994. [28] The Cresson mine open pits are located a few miles north of Victor. Mining continues today under the ownership of Newmont Corporation , which boosted gold production from 211,000 troy ounces (6.6 t) in 2014 to 451,000 troy ...
The operation became part of AngloGold in March 1999, when the company acquired the Independence Mining Company and thereby 66% of the mine. AngloGold merged with junior partner Golden Cycle Gold Corporation in 2008 and thereby acquired the remaining 33% of the project. [10] [19]
Thompson Creek Metals Company Inc. was a full cycle mining company with acquisition, exploration, development, and operation in North America. [1] The corporate office was located in Denver, Colorado. The company primarily produced copper, gold, and molybdenum. [1]
The Climax mine, located in Climax, Colorado, United States, is a major molybdenum mine in Lake and Summit counties, Colorado. Shipments from the mine began in 1915. At its highest output, the Climax mine was the largest molybdenum mine in the world, and for many years it supplied three quarters of the world's supply of molybdenum.
Newmont Corporation is an American gold mining company based in Greenwood Village, Colorado.It is the world's largest gold mining corporation. [2] Incorporated in 1921, it owns gold mines in the United States, Canada, Mexico, the Dominican Republic, Australia, Ghana, Argentina, Peru, and Suriname. [3]
The Henderson molybdenum mine is a large underground molybdenum mine west of the town of Empire in Clear Creek County, Colorado, USA. The Henderson mine, which has produced molybdenum since 1976, is owned by Freeport-McMoRan. The mine is North America's largest producer of primary molybdenum.
Coal mining in Colorado is known to negatively impact both air and water quality. [11] [12] The West Elk Mine in Gunnison County is the largest methane emitter in Colorado, and in 2017 it emitted a quantity of methane equivalent to 98,000 cars. [13] Colorado's 8 remaining coal mines use an unknown quantity of water each year. [14]