Navigable waters. Laws for protection and preservation of navigable waters of United States [from river and harbor act approved Mar. 3, 1899, and acts approved Sept. 19, 1890, June 13, 1902, May 14, 1908, Aug. 18, 1894, May 9, 1900, June 13, 1902, Mar. 3, 1905, Aug. 8, 1917, July 9, 1918, Mar. 4, 1915, July 3, 1930, June 26, 1936, and June 7, 1924].