Upstream approach wall contract reaches major milestone at Chickamauga Lock

A specialized dive team stands ready on the Tennessee River during the placement of a 420-ton concrete beam for the Chickamauga Lock Replacement Project's upstream approach wall, June 16, 2026, in Chattanooga, Tenn. Once a beam is lowered, the divers perform critical underwater inspections to verify it is perfectly seated on its bearing pads. This meticulous quality assurance is vital to the U.S. Army Corps of Engineers' mission of delivering safe, modern, and resilient navigation infrastructure for the nation. (USACE Photo by Noe Gonzalez)