The Army Corps of Engineers Nashville District and its contractor partner Johnson Brothers put a million pound concrete shell into position Aug. 6, 2018 on the riverbed on downstream end of Kentucky Lock where it will be part of a coffer dam and eventually a permanent part of the new lock wall for the Kentucky Lock Addition Project. It is the first of 10 shells that will be placed over the next year. The lock is located at Kentucky Dam, which is a Tennessee Valley Authority project at Tennessee River mile (USACE Photo by Mark Rankin)

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