Holt Lock and Dam, Black Warrior River, Alabama. Letter from the Secretary of the Army transmitting a letter from the Acting Chief of Engineers, Department of the Army, dated February 8, 1963, submitting a report, together with accompanying papers and illustrations, authorized by section 101 of the 1962 River and Harbor Act, on the addition of hydroelectric generating facilities at the authorized Holt Lock and Dam, Black Warrior River, Alabama.