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<br />LAND CONSERVATION AND'MANAGEMENT <br /> <br />Streambank Erosion <br /> <br /> <br />Streambed and bank degradation problems exist below the main stem <br /> <br /> <br />reservoirs. An estimated 30 acres of land is lost per year below Fort Randall <br /> <br /> <br />Dam and 200 acres per year is the estimated loss below Gavins Point Dam. <br /> <br /> <br />Below Fort Randall Dam where channel capacity has been diminished by delta <br /> <br /> <br />formation, flooding and waterlogging have occurred in five of the last 8 years. <br /> <br /> <br />The streambank is eroding along the James River in some areas, especially <br /> <br /> <br />in New Rockford, North Dakota and in Hutchinson and Yankton Counties in South <br /> <br /> <br />Dakota. <br /> <br /> <br />Upland Soil Erosion <br /> <br /> <br />Changing farming techniques and Dutch Elm disease are destroying many <br /> <br /> <br />shelterbelts. Many of these shelterbelts are being replanted as a single row <br /> <br /> <br />of trees which are not as effective in reducing soil erosion as the previous <br /> <br /> <br />wind breaks. Mature trees have been harvested from shelterbelts for use as <br /> <br />fuel. <br /> <br />Sediment Deposition <br /> <br />Sediment deposition in Lewis and Clark Lake may be smothering fish eggs, <br />reducing storage capacity. <br />MUNICIPAL, INDUSTRIAL, AND RURAL DOMESTIC WATER SUPPLY <br /> <br />. <br /> <br />Municipal <br />The cities of Sioux Falls, Huron, Aberdeen, and Mitchell, South Dakota, <br />and Worthington, Minnesota, are expected to need additional water supply in the <br /> <br />future. <br /> <br />H-22 <br />