NASHVILLE, Tenn. (May 10, 2018) -- The U.S. Army Corps of Engineers Nashville District invites the public for a free tour of Cheatham Lock, Dam and Hydropower Plant in Ashland City, Tenn. Free tours for the general public are Saturday, July 21; and Saturday, Sept. 8. Tours of the facility are limited to 45 persons and each tour begins at 11 a.m. Central Time. Pre-registration is required for all tour guests, including minors. The deadline to register is seven business days prior to scheduled tour. Personal information collected during sign-up is used for security background checks.