Daniel C. Jackling

Daniel C. Jackling
Daniel C. Jackling
Born	August 14, 1869
Died	March 13, 1956(1956-03-13) (aged 86)
Nationality	American
Occupation	Engineer
Engineering career
Projects	exploitation of low-grade porphyry copper
Awards	John Fritz Medal (1933)

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.

Born near near Appleton City, Missouri, he was an orphan at the age of two. Raised for a while by an aunt, Jacking eventually had to pass from family to family but finished eighth grade by the age of sixteen and then enrolled in the Normal School at Warrensburg, Missouri.

Starting in 1889, Daniel Jackling was educated in the mining and metallurgy disciplines at the Missouri School of Mines in Rolla, Missouri, now known as Missouri University of Science and Technology, eventually earning a BS degree. From 1891 until 1893 he taught chemistry and metallurgy as an assistant professor.

Jackling worked at the Cripple Creek & Victor Gold Mine from 1893 until 1895, first as a miner, then as a millman and metallurgist. Starting in 1896, Jackling worked for Joseph Raphael De Lamar in Mercur, Utah where he developed a cyanide process for extracting gold ore.

Jackling followed up at the Missouri School of Mines with a degree in metallurgical engineering in 1900, then worked a gold mine in Republic, Washington. In 1902, he managed Charles MacNeill's and Spencer Penrose's zinc-pigment plant in Canon City, Colorado and their gold mill at Colorado City, Colorado.

In the mid-1890s, Jackling, Hartwig Cohen and mining engineer Robert C. Gemmell made a detailed examination of the Bingham Canyon, Utah, copper property, most of which was owned by Enos Andrew Wall. Jackling and Gemmell "liked the prospect." On June 4, 1903, Jackling organized the Utah Copper Company to put his plan into action. Investors included Charles L. Tutt, Sr., Charles MacNeill, Spencer Penrose, Boies Penrose, Tal Penrose, and Dr. R.A.F. Penrose. Jackling was named general manager.