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  • All fields: Hoisting machinery--Colorado--Boulder County--1910-1920.
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    • Rocky Mountain Fuel Company mine

    • View of a "churn drill," used for mineral exploration as well as water well drilling, by a mine shaft in Boulder County, Colorado. A miners' camp is nearby.
    •  
    • [between 1910 and 1920]
    • Barker Dam, excavating foundation

    • View of Barker Dam construction in Boulder County, Colorado; shows Middle Boulder Creek, concrete forms, a steam shovel and railroad cars.
    • McClure, Louis Charles, 1867-1957.
    • [between 1908 and 1910]
    • Interior shaft house, Alpine Horn Mill

    • Interior view of Alpine Horn Mine Shaft House, Boulder County Colorado, a frame structure with motors, electrical boxes and a hoist; "Signal Level" chart is on the wall.
    • McClure, Louis Charles, 1867-1957.
    • [between 1910 and 1915]

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