- published: 16 Aug 2014
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The Santee River is a river in South Carolina in the United States, 143 miles (230 km) long. The Santee and its tributaries provide the principal drainage[specify] and navigation for the central coastal plain of South Carolina, emptying into the Atlantic Ocean approximately 440 miles (708 km) from its farthest headwater on the Catawba River in North Carolina. Much of upper river is impounded as the expansive, horn-shaped Lake Marion reservoir, formed by the 8-mile (13 km)-long Santee Dam. It was built during the Great Depression of the 1930s as a Works Progress Administration (WPA) project to provide a major source of hydroelectric power for the state.
The Santee is formed in central South Carolina 25 miles (40 km) southeast of Columbia by the confluence of the Wateree and Congaree rivers. It flows southeast for 5 miles (8 km) before entering the northwest corner of Lake Marion, which stretches in a long wide arc to the southeast for approximately 30 miles (48 km) to Santee Dam. A navigable diversion canal first built in the 1970s at the southern tip of the lake connects to Lake Moultrie, a reservoir on the nearby Cooper River. The modern canal is operated by Santee Cooper as part of the larger hydroelectric project on both rivers. The dam was finished in 1941.