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June 25, 1910

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Mar. 3, 1925

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Jan. 21, 1927

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July 3, 1930

Regulating

1881 project readopted. Regulating works and
dredging: 8- by 200-feet, Ohio River to St. Louis,
Mo.; 6-feet, St. Louis to Missouri River.
Rock Island, Ill., to Cape Girardeau, Mo. Navi-
gation, power, flood control (cooperative).
Northern boundary of St. Louis, Mo., to Minne-
apolis, Minn. 6- by 200-foot channel.

Ohio River to northern boundary of St. Louis,
Mo. 9-by 300-foot channel.

July 3, 1930 Northern boundary of St. Louis, Mo., to Grafton,
Ill. 9- by 200-foot channel.

July 3, 1930 Minneapolis, Minn. 6-foot turning basin at
elevation 743.5 Cairo Datum.

Illinois River to Minneapolis, Minn. 9-foot channel, "widths suitable for long-haul, common-carrier service," by a system of locks and dams. (Interim report.)

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In addition to the 9-foot project below Minneapolis, Federal projects are in force for maintenance of a navigable channel between Brainerd and Grand Rapids, Minn., 146 and 323 miles, respectively, above the head of the authorized improvement at Minneapolis, and for operation and maintenance of a group of six reservoirs formed by dams at the outlets of natural lakes on the Mississippi River and tributaries. The improvement between Brainerd and Grand Rapids was primarily for floating of logs, and has not been actively prosecuted for a number of years.

Pertinent data regarding the six headwater reservoirs are listed in the following table:

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Navigable waters connecting with the Middle and Upper Mississippi River are briefly described below:

Minnesota River.-Rises in Big Stone Lake, Minn. and S. Dak., and flows southeasterly about 224 miles to Mankato, Minn., thence northeasterly about 108 miles to join Mississippi River at mile 844.0 opposite St. Paul, Minn. Existing project for navigation improvement provides for a depth of 4 feet from Mississippi River to Shakopee (25.6 miles), to be obtained by open-river improvement. Bridges are adequate for passage of small boats. Drawbridges must be given 24 hours' notice for passage of larger craft. Controlling fixed clearance 7.7 feet above high water at mile 25.1. See table of mileages on pages 288 and 289.

St. Croix River.-Rises in northwestern Wisconsin and flows southerly about 164 miles to join Mississippi River at Prescott, Wis., mile 811.3. Existing project provides for a depth of 9 feet from Mississippi River to Stillwater, Minn. (23.4 miles) in connection with the upper Mississippi River canalization improvement, and depth of 3 feet from Stillwater to Taylors Falls, Minn. (28 miles). Bridges are adequate for towboat service to Stillwater with a minimum fixed clearance of 49.1 feet above high water. Channel from Stillwater to Taylors Falls is suitable for small boats. Certain drawbridges must be given 2 to 24 hours' notice to open for large craft. Charts from the mouth to Stillwater are shown on pages 164 and 166.

Wisconsin-Fox Rivers to Green Bay, Wis.-A possible route for small boats between Mississippi River and Lake Michigan at Green Bay exists via Wisconsin River to Portage, Wis. (116 miles), canal with locks between Wisconsin and Fox Rivers at Portage, the canalized Fox River, Portage to De Pere (156 miles) and the improved Fox River from De Pere to Green Bay (7 miles). The Wisconsin River portion of the route is not improved and navigation may be quite difficult and hazardous. The connecting canal at Portage provides a width of 70 feet with a lock 35 feet wide at each end and a controlling depth of 2 feet. The existing projects for Fox River from Portage to Green Bay provide for depths of 4 feet from Portage to Montello (31 miles), 6 feet from Montello to De Pere and 18 to 22 feet from De Pere to Green Bay. The project on the upper Fox River from Portage to 12 miles above Lake Winnebago (95 miles) is

at low water. Project depths are available for the remainder of the distance to Green Bay. Locks on the canalized portion have usable dimensions of 35 feet by 144 feet.

Illinois and Mississippi Canal.-Extends about 75 miles from Mississippi River, at the mouth of Rock River, about 3 miles below Rock Island, Ill., to the Illinois River at mile 210.2, near Hennepin, Ill., via lower portion of Rock River and artificial canal. A navigable feeder canal extends 29 miles from Rock River at Rock Falls, Ill., to summit level of the main canal, about 28 miles from Illinois River. There are 32 locks on the Rock River and main canal section of the waterway and a guard lock at the head of the feeder canal near Rock Falls. Existing project provides for a depth of 7 feet. Controlling lock dimensions are 35 by 143 feet and minimum fixed vertical clearances over the main and feeder canals are about 16.4 and 12 feet, respectively. See mileage table on pages 289 to 292.

Illinois Waterway.-Extends from Mississippi River at Grafton, Ill., mile 218.0, to Chicago, Ill., with connections to Lake Michigan at Chicago and Calumet Harbors. The route includes the following waters: Illinois River, mouth to Des Plaines River, 273 miles; Des Plaines River, mouth to Lockport, 18 miles; Chicago Sanitary & Ship Canal, Chicago River and branches from Lockport to Chicago Harbor; and Chicago Sanitary Canal, Sag Channel, Little Calumet and Calumet Rivers from Lockport to Calumet Harbor. Total distance from Grafton to Chicago Harbor 327.2 miles; to Calumet Harbor 333.4 miles. (See mileage table on pages 292 to 311.) Project for improvement provides for depth of 9 feet with widths of 300 feet from mouth of Illinois River to Lockport, about 160 to 200 feet in Sanitary Canal and Chicago River, 60 feet in Sag Channel, and 300 feet in Calumet River System. There are seven locks 110 by 600 feet on the Illinois and Des Plaines Rivers and the Sanitary Canal, one lock 50 by 360 feet on the Sag Channel at Blue Island, Ill., and one lock 80 by 600 feet at Chicago Harbor. Bridges are suitable for river towboats below Lockport, but low bridges above Lockport require specially constructed low clearance towboats. Controlling fixed bridge clearances over several sections of the Illinois Waterway route are outlined below:

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Missouri River.-Rises in western Montana and flows southeasterly about 2,500 miles to join the Mississippi River at mile 195.0 (just above St. Louis, Mo.). Under improvement to provide a 6-foot depth to Sioux City, Iowa. Improvement to Omaha, Nebr., is practically complete. Improvement from Omaha to Sioux City is tentatively scheduled for completion in 1941. There are no locks and dams.

Bridges are adequate for river towboat service. A partial table of mileages is shown on pages 312 to 319. Charts are available through Missouri River Division Engineer Office. (See address on p. 10.)

Ohio River. Rises in Pennsylvania and flows southwesterly to join the Mississippi River near Cairo, Ill. (Mile 0 of middle and upper Mississippi mileage system.) Improved by locks and dams to provide a 9-foot depth to Pittsburgh, Pa. (981 miles) and above via Monongahela and Allegheny Rivers. Locks 110 by 600 feet below Pittsburgh. Bridges adequate for river towboats. Navigation charts are published in book form by Ohio River Division Engineer Office. (See address on p. 10.)

Lower Mississippi River.-Flows southerly about 1,081 miles (natural channel distance) from Cairo, Ill., to the Gulf of Mexico. The actual navigation distance has been shortened about 115 miles from the natural length by construction of 13 cut-off channels across major bends. There are no locks and dams. Depth of 9 feet is available from Cairo to Baton Rouge, La., except during occasional short periods of extreme low water. Depth of 35 feet is available from Baton Rouge to the Gulf of Mexico, and this section is extensively used by ocean-going vessels. Connection is made at Plaquemine, La., and New Orleans, La., with the intracoastal waterway to points westerly along the Gulf coast, and at New Orleans to points easterly. Charts are published by the Mississippi River Commission. (See address on p. 10.)

MAPS AND CHARTS

Descriptive lists of available maps and charts and other information concerning the Mississippi River and its tributaries above Ohio River (except Missouri River) may be obtained upon request addressed to the district engineer offices listed on page 5 or to the Division Engineer, Upper Mississippi Valley Division, 831 U. S. Court House and Custom House, St. Louis, Mo. Requests for information should be as specific as practicable and, if maps for purposes other than navigation are desired, should indicate the purpose and the general nature and approximate scale of map desired.

Similar information concerning connecting waters may be obtained upon request addressed to the following offices:

Illinois Waterway.-Upper Mississippi Valley Division as listed above or District Engineer, U. S. Engineer Office, Post Office Building, Van Buren and Canal Streets, Chicago, Ill.

Missouri River.-Division Engineer, Missouri River Division, 1201 Davidson Building, 10 East Seventeenth Street, Kansas City, Mo. Ohio River.-Division Engineer, Ohio River Division, 1420 Enquirer Building, Cincinnati, Ohio.

Mississippi River, between Ohio River and Gulf of Mexico.-President, Mississippi River Commission, P. O. Box 80, Vicksburg, Miss. Mississippi River, Baton Rouge to Gulf of Mexico and adjacent sections of Intracoastal Waterways.-Division Engineer, Gulf of Mexico Division, 412 Masonic Temple, New Orleans, La.

HARBORS OF REFUGE

In time of running ice, havens may usually be found at the following

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In addition to these havens, some wing dams at low stages, bridge piers, and mouths of certain tributaries, chutes, and sloughs offer comparative safety in emergencies.

FUELING FACILITIES

Coal, fuel oil, and gasoline may be obtained at the following places:

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Coal and Diesel oil can be obtained at other towns along the river, but at times only in limited quantities. Gasoline is obtainable at all towns.

DRYDOCKS, MARINE WAYS, AND BOAT REPAIRS

The only drydock on the upper Mississippi River is the Government drydock at Keokuk, Iowa, which is open to the public only in emergency, and then under War Department regulations.

Marine ways and repair facilities are available to the extent indicated at the places listed below:

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1 marine way for vessels up to 500 tons; all kinds of machine and carpenter repairs.

Alton, Ill

203

Grafton, Ill.

Marine ways for small boats; machine and carpenter shops for light repairs.

218 Marine ways for small boats; facilities for light repairs.

Rock Island, Ill.

481

Marine ways for small boats; facilities for most repairs.

Dubuque, Iowa..

579

McGregor, Iowa.

633

Prairie du Chien, Wis..

635

Temporary ways constructed as required; facilities for most repairs.
Small cradle ways; repairs to small hulls and motors.
Small skid ways; repairs to small hulls and motors.

La Crosse, Wis.

698

Marine ways for small boats; facilities for repairs to small hulls and

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Cradle ways for boats up to 175 tons and barges 300 feet long; repairs to small hulls and motors.

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Marine ways for boats up to 10 tons and 50 feet in length.

Derricks and marine ways for boats up to 100 tons and 90 feet in length; repairs to hulls and motors.

Machine and carpenter shops with facilities for making minor repairs will be found at many of the towns where fuel is obtainable.

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