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<br />of levees have been instal led. These improvements prevent about <br />$10,000,000 of average annual damage. <br /> <br />Soi I erosion occurs in al I parts of the State but is most severe <br />in the eastern part where the rainfal I is grp.ater. Sheet, ri I I, and <br />smal I gully erosion problems re~uire the appl ication of land treatment <br />measures and conservation management practices by individual landowners. <br />Large gully and channel degradation problems usually require project-type <br />action. Gully erosion and channel degradation problems are causing <br />an estimated average annual loss of about $2,075,000 on 412,500 acres <br />of land. <br /> <br />Streambank erosion is closely related to flood flows. It occurs <br />along major streams throughout the State at mi Id to moderate rates. <br /> <br />I~av i qat i on <br /> <br />Movement of freight by navigation on the Sioux City to Kansas City <br />reach of the Missouri River has increased from about 130,000 tons in <br />1955 to over 1,380,000 tons in 1969. Over 50 percent of the total 1969 <br />Missouri River tonnage was moved into or out of ports in the Sioux City <br />to Rulo reach. The main needs to increase use of navigation transport <br />are the construction of grain handl ing faci lities at the ports and the <br />development of standardized shipping containers that can be readi Iy <br />transferred between rai I road cars, trucks, and barges. <br /> <br />E lectri c Power <br /> <br />The electric power industry is one of the fastest growing industries <br />in the State with electrical power usage roughly doubl ing every ten years. <br />It is expected to expand in the future at a slightly slower rate. The <br />annual power requirements are projected to increase from about 10,400,000 <br />megawatt hours (MWHl in 1970 to over 210,000,000 MWH by 2020. This <br />growth is expected to be supplied by thermal (steam) generation. About <br />622,000 acre-feet of water annually are used for cool ing purposes under <br />current conditions. This is expected to increase to more than 1,986,000 <br />acre-feet by 1980 and 2,320,000 acre-feet by 2020. The rate of increase <br />of cooling water diversions slows considerably after 1980 due to the <br />expected use of cooling towers in al I plants constructed after that date. <br />If cooling towers are used for all thermal generation in 2020, the water <br />diversion requirement would be lowered to 358,000 acre-feet. <br /> <br />Fish and Wi Idl ife <br /> <br />Increased numbers of fish and wi Idlife wi I I be needed In the future <br />to meet both consumptive and nonconsumptive demands. Adequate amounts <br /> <br />5 <br />