Nickajack Lock will undergo a series of closures to perform repairs on the upper and lower lock gates. The lock will undergo a complete closure between 15 September 2020 at 06:00 A.M. and 01 October 2020 at 06:00 P.M. The lock will temporarily reopen on 01 October 2020 at 06:00 P.M. and will last until 06 October 2020 at 06:00 A.M. The lock will be open 24 hours per day during this period. The lock will then undergo intermittent closures between 06 October 2020 and 13 October 2020 with the lock being closed between 06:00 A.M. and 04:00 P.M. daily. The lock will then resume normal operations on 13 October 2020 at 04:00 P.M.