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<br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br />I <br /> <br />I <br /> <br />I <br />I <br />I <br /> <br />I <br /> <br />',''i<,_:" ':;,.'" <br /> <br />, 00'04'97 <br /> <br />CONCLUSIONS AND ADDITIONAL RECOMMENDATIONS <br /> <br />A. <br /> <br />Nonpoint source pollution is a major Middle Missouri Subbasin problem. <br /> <br />Steep slopes and loess soils in Iowa, northwest Missouri, southwest <br /> <br />Nebraska, and northeast Kansas cause severe gully erosion. Strearnbank <br /> <br />erosion is a particular problem in the Nemaha Basin, Nebraska, and <br /> <br />Nishnabotna and Nodaway Basins in Missouri. Nebraska counties between <br /> <br />South Sioux City and Omaha have the highest soil loss rates in the State. <br /> <br />TO address agricultural runoff problems, it is recommended that the Rural <br /> <br />Clean Water Program (Section 208(j) of the Clean Water Act of 1977), which <br /> <br />would control agricultural related.nonpoint sources of pollution on <br /> <br />private rural lands, be funded and implemented. <br /> <br />B. <br /> <br />Flooding is still a problem along many of the tributary streams in the <br /> <br />Middle Missouri Subbasin. In many of the smaller communities, present <br /> <br />planning and evaluation criteria and social preferences preclude <br /> <br />formulation of a feasible, acceptable structural solution. <br /> <br />C. <br /> <br />Even though levees have been constructed along the Missouri River, <br /> <br />flooding continues to be a problem downstream of the Platte River in <br /> <br />Nebraska. Private leveees are being moved or constructed too close to the <br /> <br />river infringing on the floodway and shifting flood damage to other areas. <br /> <br />D. <br /> <br />Tie-back levees on tributary streams were designed to provide 50-year <br /> <br />protection from flooding caused by main stern flooding and tributary <br /> <br />flooding. Due to numerous factors, including aggradation of the stream <br /> <br />beds of the tributaries, this level of protection has dropped to 10- to <br /> <br />2s-year events. <br /> <br />E. <br /> <br />Consumptive use and diversion of upstream States will decrease the amount <br /> <br />of water available for downstream uses. It is recommended that an <br /> <br />investigation of interstate water allocation be initiated by the Missouri <br /> <br />8-27 <br />