Monolithic effort to construct lock chamber heats up
A Shimmick construction worker prepares steel forms 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)