ASHLAND CITY, Tenn. (Sept. 6, 2012) The U.S. Army Corps of Engineers Nashville District’s Cheatham Lock will be closed to all river traffic from 6 a.m., Oct. 16 through 6 p.m., Nov. 15, 2012 to permit major maintenance repairs to hydraulic and mechanical equipment damaged during the 2010 flood along with other routine maintenance.