Monolithic effort to construct lock chamber heats up
U.S. Army Corps of Engineers and Shimmick construction crews work to construct monoliths July 21, 2020 for a new navigation lock as part of the Chickamauga Lock Replacement Project at the Tennessee Valley Authority project. (USACE Photo by Lee Roberts)

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Photo by: Lee Roberts |  VIRIN: 200721-A-EO110-1006.JPG