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: | 06 29 1938 |
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Description: | A man operates an International PD-80 power unit mounted on a suction dredge for sand and gravel. The power unit is owned by Roy Deringer of Ithaca, Michig... |
Date: | 1931 |
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Description: | View from shoreline of a crane lifting machinery to workers at the top of the bridge during construction. Words on the crane reads, "Stevens Brothers and S... |
Date: | 1907 |
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Description: | View of a steam dredge at the construction site of a dam on a river. Identified as the construction of the Hatfield dam in 1907. |
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