Navigation Interests 21-22: After construction of the downstream cofferdam was completed at Kentucky Lock at Tennessee River mile 22.4 in Grand Rivers, Kentucky, a survey of the downstream approach was conducted to determine if channel changes occurred and help mariners transit the lock efficiently. The most recent survey indicated that when the tailwater reaches an elevation of 301.0, the channel width between the downstream cofferdam protection cell and rip rap protected shoreline elevation 288 or higher, is reduced to between 105-feet and 110-feet wide. A buoy has been positioned approximately 75 feet upstream of the point of the powerhouse island, marking the rip rap contour to assist with lining up for the lock. Vessel operators should exercise caution when transiting this area and approach in a controlled manner as to transit the lock safely. Proper alignment of the tow by use of the protection cell is required prior to entry of the lock. The photo below is a map of the area showing channel contour.
