Date: | 07 01 1911 |
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Description: | A steam-powered centrifugal sand pump at work on the Wisconsin River during the construction of the power dam. Pilings of the coffer dam are visible in the... |
Date: | 1969 |
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Description: | Man looking at the construction site of the World Trade Center. |
Date: | |
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Description: | View of a walking dredge in a field. A man, a woman holding a child, and a young boy are on the dredge, and a woman perches on the projecting arm, and anot... |
Date: | 1920 |
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Description: | Mobile “walking” land dredge. A few men in work clothes stand posing at the front of the dredge, and four other men wearing suits pose in the suspended dre... |
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