The Tennessee Valley Authority Is Still Trying To Determine The Cause Of Seepage At Boone Lake. The Utility Is Aiming To Hold The Water Level Of The Boone Reservoir At Approximately 12 Feet Below Normal Winter Elevation. Water And Sediment Seepage Has Occurred From The Riverbank Below The Dam Near Johnson City. Boaters Need To Use Caution While Operating On Boone Reservoir Because Of Lower-Than-Normal Water Levels.