Division commander’s visit highlights people, partnerships in mission delivery

CHATTANOOGA, Tenn. (Feb. 20, 2026) – Lt. Col. Guillermo Guandique, commander of the U.S. Army Corps of Engineers Nashville District, briefs Col. Herlihy, commander of the Great Lakes and Ohio River Division, during a tour of the Chickamauga Lock Replacement Project in Chattanooga, Tennessee, Feb. 20, 2026. Progress on the multi-contract project includes the new lock chamber at 76 percent completion and the upstream approach wall at 70 percent, with the final contract awarded in February. The new 110-by-600-foot lock will process nine jumbo barges in one lockage, compared to one in the existing lock, an 80% increase in efficiency for the navigation industry.