Letter from the Secretary of the Army Transmitting a Letter from the Chief of Engineers, Department of the Army, Dated February 16, 1961, Submitting a Report, Together with Accompanying Papers and an Illustration, on the Great Lakes Harbors Study -- Interim Report on Milwaukee Harbor, Wisconsin, Requested by Resolutions of the Committees on Public Works, United States Senate and House of Representatives, Adopted May 18, 1956, and June 27, 1956 and Also in Final Response to Resolution of the Committee on Public Works, House of Representatives, Adopted June 29, 1955