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  • All fields: Steam shovels--Colorado--1940-1950.
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    • Clear Creek - close up from ground shovel bucket dumping in 800ft bore

    • Clear Creek - close up from ground shovel bucket dumping in 800ft bore

    • A man works in a a highway tunnel on Highway 6 in Jefferson County or Clear Creek County, Colorado. Shows a steam shovel and a dump truck. Letters read: "Ed. H. Honnen Construction Co."

    • Construction workers--Colorado--1940-1950.; Dump trucks--Colorado--1940-1950.; Excavation--Colorado--1940-1950.; Road construction--Colorado--1940-1950.; Steam shovels--Colorado--1940-1950.; Tunnels--Colorado--1940-1950.

    • [between 1940 and 1950?]
    • Mining - crane and trucks

    • Mining - crane and trucks

    • View of a sand and gravel mine operation in Colorado; a steam shovel loads a dump truck by a pit. Letters read: "Brannan Sand & Gravel."

    • Brannan Sand & Gravel Co. (Denver, Colo.)--1940-1950.; Sand and gravel plants--Colorado--1940-1950.; Dump trucks--Colorado--1940-1950.; Mining--Colorado--1940-1950.; Steam shovels--Colorado--1940-1950.

    • [between 1940 and 1950?]

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