That the creation of any obstruction not affirmatively authorized by Congress, to the navigable capacity of any of the waters of the United States is hereby prohibited; and it shall not be lawful to build or commence the building of any wharf, pier, dolphin, boom, weir, breakwater, bulkhead, jetty, or other structures in any port, roadstead, haven, harbor, canal, navigable river, or other water of the United States, outside established harbor lines, or where no harbor lines have been established, except on plans recommended by the Chief of Engineers and authorized by the Secretary of War; and it shall not be lawful to excavate or fill, or in any manner to alter or modify the course, location, condition, or capacity of, any port, roadstead, haven, harbor, canal, lake, harbor of refuge, or inclosure within the limits of any breakwater, or of the channel of any navigable water of the United States, unless the work has been recommended by the Chief of Engineers and authorized by the Secretary of War prior to beginning the same.

• Mississippi River from mile 0, Cairo, Ill, to mile 300, Saverton, Mo.
• Missouri River from mile 0, St Louis, Mo. to mile 49.9, Weldon Springs, Mo, along both banks, then to mile 65.6 on Left descending bank at Washington, Mo.
• Illinois River from mile 0, Grafton, Ill, to mile 80, LaGrange, Ill
• Kaskaskia River from mile 0, to mile 36.2, Fayetteville, Ill.
• Big Muddy River from mile 0, to mile 49, Desoto, Ill.
• Salt River from mile 0, to mile 5.1, Riverland, Mo.
• Chain of Rocks Canal, Located approximate miles 184.2 - 194 Mississippi River.
• Femme Osage Creek from Missouri River, to Callaway Fork in St Charles, Mo.
• Meramec River from 0, to mile 49, Pacific, Mo.