History of Daniel Cowan Jackling, Utah
Taken from the Utah History Encyclopedia (Links Added)

The Jackling-Gremmell plan, which was put into operation by both the Utah Copper Company and the Boston Consolidated Company at Bingham, included stripping the overburden or waste, then in open-pit mining fashion loading the low-grade ore (often less than 2 percent copper) into railroad cars with steam shovels, and transporting the ore to concentrating mills built on the north slope of the Oquirrh Mountains. One of Jackling's first responsibilities was to oversee the construction of a mill at Copperton, which was used to demonstrate the validity of his copper-mining theories, and later he directed the building of the Magna concentrator, which was begun early in 1906. He also was successful in obtaining additional financial backing for Utah Copper from the Guggenheim family. In 1910, at Jackling's urging, the Boston Consolidated Company with its mining interests at Bingham and its Arthur milling facilities located west of the Magna Mill merged with and became part of the Utah Copper Company. By midway through the twentieth century, more than 60 percent of the world's copper production resulted from Jackling's development of low-grade ore processing.

During the first four decades of the twentieth century, Jackling had his hand in most copper companies in the American West as a manager and/or director. During World War I, Jackling served as director of government explosives plants, and for his outstanding wartime efforts he was awarded the Distinguished Service Medal by President Woodrow Wilson. In 1926 Jackling was awarded the Gold Medal Award of the Mining and Metallurgical Society of America, and in 1930 the American Institute of Mining and Metallurgical Engineers honored him with the William Lawrence Saunders Gold Medal of "achievement in initiating mass production of copper from low-grade ore through application of engineering principles." In 1940 Jackling was given the Washington Award of the Western Society of engineers for "pioneering in large-scale mining and treatment of low-grade copper ores, releasing vast resources from formerly worthless despots."

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