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Monolithic effort to construct lock chamber heats up
Shimmick construction workers prepare the riverbed inside a coffer dam July 21, 2020 in preparation to place more concrete for a monolith. The U.S. Army Corps of Engineers Nashville District is constructing a new navigation lock as part of the Chickamauga Lock Replacement Project at the Tennessee Valley Authority project on the Tennessee River in Chattanooga, Tennessee. (USACE Photo by Lee Roberts)

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Photo by: Lee Roberts |  VIRIN: 200721-A-EO110-1005.JPG