River, central South Carolina, U.S. It enters the state from North Carolina as the Catawba River but is known as the Wateree in South Carolina.
It joins the Congaree River to form the Santee River . The Wateree-Catawba River is 395 mi (636 km) long. The Wateree flows through a series of lakes and reservoirs, the largest of which is Wateree Lake, 15 mi (24 km) long.