...-six miles of railroad, including the long truss bridge across the Tennessee River and the trestle at Whiteside, a quarter of a mile long and one hundred and thirteen feet high, had been destroyed. Rosecrans ' only route to supply his army was the river. It was Lieutenant-Colonel (later Brigadier-General) William G. Le Duc who saved from a freshet the first flat-bottomed boat, the Chattanooga, which car...