Southern Marine is conducting core drilling for the Tennessee Valley Authority during daylight hours seven days a week at Kentucky Lock's upper guide wall concurrent with previously scheduled maintenance according to Notice to Navigation 21-43 from Nov. 1-15, 2021. They are using a 194-foot by 35-foot crane barge and the M/V Low Bid. They are mooring equipment and working at the location and monitoring channel 13. Kentucky Lock is located at Tennessee River mile 22.4 on the Tennessee River in Grand Rivers, Kentucky. Call David Serodino with Southern Marine Construction Company at 423-443-8252 for more information.