Daniel C. Jackling

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Daniel C. Jackling
Daniel C. Jackling.gif
Daniel C. Jackling
Born August 14, 1869
Died March 13, 1956(1956-03-13) (aged 86)
Nationality American
Engineering career
Significant projects exploitation of low-grade porphyry copper

Daniel Cowan Jackling (August 14, 1869 – March 13, 1956), was an American mining and metallurgical engineer who pioneered the exploitation of low-grade porphyry copper ores at the Bingham Canyon Mine, Utah.


Daniel Jackling was educated in mining and metallurgy disciplines at the Missouri School of Mines in Rolla, Missouri, now known as Missouri University of Science and Technology. In 1898, Jackling and Robert C. Gemmell made a detailed examination of the Bingham Canyon copper property. They recommended open pit mining, using steam shovels to load railroad cars, a novel idea at the time. In 1903, Jackling organized the Utah Copper Company to put his plan into action. The mine proved to be profitable, and open-pit mining of low-grade copper deposits came to dominate the industry by mid-century.

Jackling went on to a very successful and lucrative career as a manager and executive for many copper companies, including the Utah Copper Company, in the Western U.S. He was honored with numerous professional awards, including the Washington Award from the Western Society of Engineers for "pioneering in large-scale mining and treatment of low-grade copper ores, releasing vast resources from formerly worthless deposits."[1]

His collected papers were given to the Stanford University Library.[2]


The Daniel C. Jackling Award, established in 1953, is presented annually by the Society for Mining, Metallurgy, and Exploration for "significant contributions to technical progress in mining, geology, and geophysics".[3]

The Jackling House[edit]

The Jackling House, the historic Spanish Colonial Revival Style mansion and estate, was located in Woodside, California. It was designed by renowned architect George Washington Smith in 1925 for Jackling and his family.

In 1984 Steve Jobs purchased the 17,000 sq ft (1,600 m2) property and lived in it for ten years. After that, he rented it out for a time, and in 2000, he stopped maintaining it. In 2004 Jobs stirred Woodside preservationist controversy by applying for a permit to tear the historic landmark down to build a smaller house. A judge ruled against demolition in early 2006. Jobs appealed the decision. In April 2007, the California State Supreme Court refused to hear the Jobs appeal, which meant he could not raze the house. Nonetheless, Jobs won approval to demolish the Jackling House from the Woodside Town Council on May 13, 2009.[4]

On April 29, 2010, the architectural-historical preservationists group Uphold Our Heritage appealed the March court decision to allow the Woodside to issue a demolition permit, submitted by the group's attorney Doug Carstens. The appeal put an "automatic stay" on the issuance of demolition permits. "If that (Yoho family relocation permits) works out, and it looks like there's a lot of promise to that working out, then it won't be necessary to pursue the appeal," he said. "We've always been in favor of relocation and restoration." "We respectfully disagree with the court's decision, and we have all along." Carstens said.[5]

The house was demolished in February 2011.

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