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https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/434351Work progresses inside the Colorado Stone Quarries mine. Original image from Carol M. Highsmith’s America, Library of…Save

Work progresses inside the Colorado Stone Quarries mine. Original image from Carol M. Highsmith’s America, Library of Congress collection. Digitally enhanced by rawpixel.

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