Underground Mill Excavation at the Big Missouri Mine

THE chief factors influencing the decision to build the Big Missouri mill underground were the topography of the country and the climate. The location underground assured certain saving in the cost of operation, such as the hearing of the mill, shovelling snow, and handling ore, which, over a period of time, would offset the greater initial cost of the mill excavation and machinery installation underground, as compared with the cost of a like plant on the surface.
Keywords: Benches, cyanide, feet, glacier, Missouri ridge., tuffs, excavation, Mill, Mills, Mine, Mines, Tunnels, Underground
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