Earl Keeler, 91, (left) retired U.S. Army Corps of Engineers Nashville District lock operator, sits for a videotaped interview Dec. 19, 2013 on the landside of the now closed Hales Bar Lock he operated from 1960 to 1967. Keeler’s visit to the now closed 100-year-old lock was arranged by the just recently retired Nickajack Lock lockmaster, Butch Witcher, who Keeler helped train at Nickajack Lock in 1980.