Daniel C. Jackling

Daniel C. Jackling was an American mining engineer and industrialist whose revolutionary innovations in large-scale, low-grade ore processing fundamentally transformed the copper mining industry. He is most famous for developing the Bingham Canyon Mine, proving the economic viability of open-pit mining for massive, low-grade porphyry copper deposits. His methods reshaped global metal production and established him as a pivotal figure in the history of extractive metallurgy.

Early life and education

Daniel Cowan Jackling was born in Appleton City, Missouri, and spent his youth working on the family farm. He pursued higher education at the Missouri School of Mines and Metallurgy in Rolla, Missouri, where he studied metallurgy and chemistry. After graduating, he gained practical experience at various mining operations, including work in the Cripple Creek mining district in Colorado, which provided a crucial foundation in ore treatment and mineral processing.

Career and innovations

Jackling’s early career involved consulting and managing several mining ventures across the Western United States. His transformative insight was the application of mass-production principles to mining, advocating for the use of high-volume earthmoving equipment, rail transport, and innovative flotation process techniques to profitably mine low-grade ores. He co-founded the Utah Copper Company to implement these ideas, securing backing from investors like the Guggenheim family and Charles MacNeill. His systematic approach to bulk mining and milling became the standard model for the global copper industry.

Bingham Canyon Mine

Jackling’s most enduring achievement was the development of the Bingham Canyon Mine southwest of Salt Lake City, Utah. After acquiring the property, he overcame widespread skepticism by demonstrating that its low-grade porphyry copper deposit could be mined profitably through enormous-scale open-pit mining operations. He engineered vast networks of railways and pioneered the use of steam shovels and electric power for high-volume excavation and processing at the Arthur concentrating mill. The mine, later operated by Kennecott Copper Corporation, became one of the world’s largest man-made excavations and a symbol of modern industrial mining.

Legacy and honors

Daniel Jackling’s legacy is profound, having established the technological and economic template for twentieth-century base metal mining. His work directly influenced major operations like the Chuquicamata mine in Chile and the Morenci mine in Arizona. He received numerous accolades, including the John Fritz Medal and the Washington Award. He was a founding member of the American Institute of Mining, Metallurgical, and Petroleum Engineers and served as a director for the U.S. Bureau of Mines. The Society for Mining, Metallurgy & Exploration annually presents the Daniel C. Jackling Award in his honor.

Personal life

Jackling married Virginia Jolliffe in 1900, and the couple resided primarily in San Francisco, California. He was an avid art collector and owned a notable estate in Woodside, California, designed by architect George Washington Smith. A dedicated philanthropist, he supported educational institutions, including his alma mater, the Missouri University of Science and Technology. Following his death in San Francisco, his contributions continued to be celebrated through various endowments and memorials in the mining engineering community.

Category:American mining engineers Category:1869 births Category:1956 deaths Category:People from Missouri Category:Copper mining