SAVANNAH, Ga. – Every year, more than six-million visitors travel to walk the cobblestone steps of River Street in historic, downtown Savannah, Ga. An unobstructed view of the Savannah River offers visitors the unique opportunity of viewing some of the largest cargo ships in the world as they pass by under the Talmadge Memorial Bridge on their way to the Georgia Ports Authority’s Garden City Terminal. What they don’t see through the dark water under the passing ships, however, is the 47-feet deep river channel bottom, recently deepened and annually maintained by the U.S. Army Corps of Engineers, Savannah District.