The rivers of the Atlantic Coastal Plain flow through broad flat valleys and sometimes can cause damaging floods to large areas. Flooding in the mountains and the Piedmont, however, is restricted more to the immediate stream valleys. The early spring is usually the flood season, but hurricanes in the late summer and autumn can sometimes cause tremendous flood damage both along the coast and in the river valleys of the Piedmont and mountains.
Most of the dams and reservoirs on the Yadkin, Catawba, Roanoke, and other North Carolina rivers play a double role of hydroelectric power production and flood control, although some dams are used for power generation or for flood control only. By far the largest reservoir is Lake Norman, on the Catawba River, completed in 1964. Others include Lake Tillery, Badin Lake, High Rock Lake, and Wilkesboro reservoir on the Yadkin River, and John L. Kerr Reservoir and Lake Gaston on the Roanoke River. Fontana, Nantahala, and Cheoah reservoirs, in the west, are Tennessee Valley Authority (TVA) multipurpose dams for both flood control and power. "North Carolina" © Emmanuel BUCHOT, Encarta, Wikipedia
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