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

    • Rocky Mountain Fuel Company mine

    • View of a portable head frame by a mine shaft in Boulder County, Colorado. A miners' camp is nearby.

    • Rocky Mountain Fuel Company--Facilities--1910-1920.; Boulder County (Colo.)--1910-1920.; Coal mining--Colorado--Boulder County--1910-1920.; Hoisting machinery--Colorado--Boulder County--1910-1920.; Mining--Colorado--Boulder County--1910-1920.

    • [between 1910 and 1920]
    • Barker Dam, excavating foundation

    • 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.

    • Barker Meadow (Colo.)--1910-1920.; Barker Reservoir (Colo.)--1910-1920.; Boulder County (Colo.)--1910-1920.; Middle Boulder Creek (Colo.)--1910-1920.; Dam construction--Colorado--Boulder County--1910-1920.; Hoisting machinery--Colorado--Boulder...

    • [between 1908 and 1910]
    • Interior shaft house, Alpine Horn Mill

    • 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.

    • Alpine Horn Mine (Boulder County, Colo.)--1910-1920.; Boulder County (Colo.)--1910-1920.; Hoisting machinery--Colorado--Boulder County--1910-1920.; Mining--Colorado--Boulder County--1910-1920.

    • [between 1910 and 1915]

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