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<br />There is a need for fishing areas and sWimming beaches closer to the <br /> <br /> <br />population centers throughout the Western Dakotas Subbasin. <br /> <br /> <br />In western South Dakota, power boat facilities and ski beaches are needed. <br /> <br /> <br />WATER QUALITY <br /> <br />Nonpoint Source POllution <br />The Heart and Little Missouri Rivers have high concentrations of nitrates, <br />phosphates, TDS, and coliforms. <br />Coliform bacteria often indicate point pollution sources such as feedlots. <br />However, cattle grazing over large areas "may" be considered a nonpoint,source. <br />The White River has high metal copcentrations. The Missouri River in <br />general has high mercury concentrations. <br /> <br />Point Source Pollution <br /> <br /> <br />Increases in energy-related activity are adding to the waste load carried <br /> <br /> <br />by the Knife River and tributaries. <br /> <br /> <br />Removal of lignite aquifers could result in disturbance of ground-water <br /> <br /> <br />supplies in the Knife and Cannonball River Basins. <br /> <br /> <br />Portions of the Cheyenne River and Belle Fourche River have high mercury, <br /> <br /> <br />arsenic, and cyanide concentrat~ons. <br /> <br />Rural residential developments, road construction, timber industry <br />practices, and livestock wastes are reducing water quality in the Belle Fourche <br />River Basin. <br />It is expected that increased mining and oil drilling activities could <br />adversely affect both ground water and surface water over large segments of the <br />Missouri River Basin. <br />Natural Resources <br /> <br />Eutrophication is a problem in most lakes in the Black Hills. <br /> <br />H-16 <br />