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At the Olmsted Locks and Dam construction project, the cores of the lower pier shells needed to be in-filled with concrete before they would be overtopped by the Ohio River and clogged with silt and debris. (U.S. Army Corps of Engineers photo by Bill Gilmour)
At the Olmsted Locks and Dam construction project, the cores of the lower pier shells needed to be in-filled with concrete before they would be overtopped by the Ohio River and clogged with silt and debris. (U.S. Army Corps of Engineers photo by Bill Gilmour)

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Photo by: Bill Gilmour |  VIRIN: 121108-A-CE999-020.JPG