Kennecott Utah Copper
Kennecott Utah Copper
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Kennecott Utah Copper

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Kennecott Utah Copper

Kennecott Utah Copper LLC (KUC), a division of Rio Tinto Group, is a mining, smelting, and refining company. Its corporate headquarters are located in South Jordan, Utah. Kennecott operates the Bingham Canyon Mine, one of the largest open-pit copper mines in the world in Bingham Canyon, Salt Lake County, Utah. The company was first formed in 1898 as the Boston Consolidated Mining Company. The current corporation was formed in 1989. The mine and associated smelter produce 1% of the world's copper.

Utah Copper Company had its start when Enos Andrew Wall realized the potential of copper deposits in Bingham Canyon, 15 miles (24 km) southwest of Salt Lake City, Utah in 1887. He acquired claims to the land and started underground mining. In the mid-1890s, metallurgist Daniel C. Jackling and mining engineer Robert C. Gemmell inspected the property and liked the prospects. Both men examined Wall's properties and recommended open-pit mining. In 1898, Samuel Newhouse and Thomas Weir formed the Boston Consolidated Mining Company.

Jackling and Wall formed the Utah Copper Company on 4 June 1903, with Charles L. Tutt Sr., Charles MacNeill, Spencer Penrose, Boies Penrose, Tal Penrose, and Dr. R.A.F. Penrose as investors. MacNeill was named president, Spencer "Speck" Penrose was named secretary-treasurer, and Jackling was named general manager. The company immediately started a pilot mill at Copperton.

With financing from Guggenheim Exploration, the first digging began in 1906. The same year, the Kennecott Mines Company was formed in Alaska, named after explorer and naturalist Robert Kennicott. A smelter was also started at Garfield, Utah by the American Smelting and Refining Company (ASARCO) to refine the Bingham Canyon ore.

In 1907, the Utah Copper mill in Magna started operation. Utah Copper and Boston Consolidated merged in 1910. Five years later, in 1915, Kennecott acquired a 25% interest in the company. In 1915, to dilute the cost of railroad construction to support the mines, and to find new ventures for the capital produced by the Alaskan mine, Kennecott Copper Corporation was incorporated from the various financial interests involved. By this time, the Guggenheim Exploration was already actively working copper mines in Chile and Utah. Upon Kennecott's creation, they merged their Braden Copper Company property in Chile, as well as 25 percent of the Utah Copper Company, into Kennecott.

These actions resulted in Kennecott taking possession of Braden's El Teniente, the world's largest underground copper mine, located in the Chilean Andes. Founded by William Braden and E.W. Nash of New York City, the Braden Copper Company had started mining there in 1906.

In Utah, the Bingham and Garfield Railway opened in 1911 to transport local ore, replacing the Denver and Rio Grande Railroad's line. In 1936, Kennecott acquired all the assets of the Utah Copper Company.

During World War II, Bingham set new world records for copper mining and produced about 30% of the copper used by the Allies. During the war, many women worked for the first time in the mines, mills, and smelters, replacing the men who had gone to war.

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