Caseville Harbor, Mich. Letter from the Secretary of the Army transmitting a letter from the Chief of Engineers, Department of the Army, dated November 22, 1960, submitting a report, together with accompanying papers and an illustration, on an interim report on Caseville Harbor, Michigan, requested by resolution of the Committee on Rivers and Harbors, House of Representatives, adopted April 24, 1945, and authorized by the River and Harbor Act, approved March 2, 1945.