Navigation Notice 21-06: The U.S. Army Corps of Engineers Nashville District announces that the main chamber at Pickwick Lock at Tennessee River mile 206.7 in Counce, Tennessee, is closing for repairs 6 a.m. to 6 p.m. daily from March 1-4, and 8-18, 2021. The auxiliary chamber will be open for the duration of closures. For more information, call Randy King at 731-925-2334.