Upstream approach wall contract reaches major milestone at Chickamauga Lock

McKinney Salvage LLC, a subcontractor for CJ Mahan Construction Co., operates a heavy-lift derrick crane to guide a 420-ton concrete beam into position for the Chickamauga Lock Replacement Project's upstream approach wall Tuesday, June 16, 2026, on the Tennessee River. The placement marks the first of eight beams installed during this phase of construction for the U.S. Army Corps of Engineers Nashville District, demonstrating the critical engineering partnerships driving forward USACE’s mission to modernize regional waterways and deliver resilient navigation infrastructure for the nation. (USACE Photo by Noe Gonzalez)