Shell Creek and Tributaries, Nebraska, Letter from the Secretary of the Army, Transmitting a Letter from the Chief of Engineers, Department of the Army, Dated June 16, 1956, Submitting a Report, Together with Accompanying Papers and Illustrations...requested by Resolutions of the Committee on Commerce, United States Senate, Adn the Committee on Flood Control, House of Representatives, Adopted November 5, 1945, and November 15, 1945, Respectively