Lt. Gen. William "Butch" Graham (front left), commanding general of the U.S. Army Corps of Engineers and 56th chief of engineers, walks with Allen Malcomb (front right), chief of quality assurance for the Chickamauga Lock Replacement Project, at the bottom of the new lock chamber between two miter gates during a site visit on Dec. 19, 2024, in Chattanooga, Tenn., along the Tennessee River. (U.S. Army Corps of Engineers photo by Noe Gonzalez)