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<br />channel of 9-foot depth and 300-foot minimum width, <br />The improvement was started in the early 1930's, and <br />consists in gener~l of integrating the numerous small <br /> <br /> <br />Bank Stabilization and Flow Regulation Minimize Bank <br />Erosion And Provide A Navigable Channel <br /> <br />shallow channels of the natural river into one stabilized <br />and comparatively deep channel as illustrated in the <br />photograph, <br />hi. addition, six multipurpose dams and reservoirs on <br />the Missouri River main stem above Yankton, S, Dak., <br />now provide flow regulation for hydroelectric power <br />generation, downstream navigation, and other purposes. <br />Figure 32 shows the main stem reservoirs and the service <br />and cargo facilities for the Missouri River navigation <br />system from Sioux City, la" to the mouth, above St. <br />Louis, Mo. <br />The authorized improvement of the Missouri River <br />for navigation between Sioux City, la., and the mouth <br />has not been completed to its design draft of 9 feet. <br />However, in 1966 barge traffic on the waterway carried <br />2.6 million tons of freight, an equivalent of about 1.2 <br />billion ton-miles. Sixty percent of the tonnage currently <br />being moved on the waterway is farm products, <br />primarily grain; about 11 percent is food and kindred <br />products; 10 percent is chemicals;, and the remaining <br />tonnage includes petroleum products, metal products, <br />stone, clay, paper, and textiles. <br /> <br /> <br /> <br />76 <br />