Naugatuck River at Ansonia and Derby, Connecticut: Letter from the Secretary of the Army Transmitting a Letter from the Chief of Engineers, Department of the Army, Dated December 20, 1961, Submitting a Report...on an Interim Report...requested by Resolutions of the Committees on Public Works, United States Senate and House of Representatives, Adopted on September 14, 1955, June 13, 1956 and July 23, 1956, Respectively