NASHVILLE, Tenn. (May 10, 2018) – The U.S. Army Corps of Engineers Nashville District and Tennessee Valley Authority invite the public for a free tour of Chickamauga Lock at Tennessee River mile 471 in Chattanooga, Tenn., Saturday, Aug. 18, 2018. Four groups of 25 will be able to tour the facility at 8 a.m., 9:30 a.m., 11 a.m., and 12:30 p.m. Pre-registration is required for all tour guests (including minors).