Pickwick Auxiliary Lock at Tennessee River mile 529.9 and Watts Bar Lock at Tennessee River mile 206.7 are having intermittent closures while TWRA performs mussel surveys at the Tennessee Valley Authority projects, as well as complete mussel relocations at Pickwick Lock. Pickwick Auxiliary Lock is having intermittent closures 9 a.m. to 4 p.m. Central Standard Time Sept. 2-3, 2020. Watts Bar is having intermittent closures 9 a.m. to 4 p.m. Eastern Standard Time Sept. 9-10, 2020.