Chickamauga Lock at Tennessee River mile 471 in Chattanooga, Tennessee, is closing intermittently from 9 a.m. to 4 p.m. Sept. 16 and 17, 2020 while Tennessee Wildlife Resource Agency performs mussel surveys at the tailwater lower approach to the lock. Mariners should stay clear of the area during this time period due to divers in the water. Contact Chickamauga Lock at 426-875-6230 or via Marine channel 13/16 with any questions or concerns.