The Congaree River is a short but wide river in South Carolina in the United States; It flows for approximately 53 miles (85 km). The river serves an important role as the final outlet channel for the entire Lower Saluda and Lower Broad watersheds, before merging with the Wateree River just north of Lake Marion to form the Santee River.

The Wateree River, about 75 mi (120 km) long, is a tributary of the Santee River in central South Carolina in the United States, which flows to the Atlantic Ocean. It was named for the Wateree Native Americans, a tribe who had migrated to this area from western North Carolina. They lived here until the early 18th century, when they were set upon and displaced by mostly English settlers during the Yamasee War. Survivors merged with the larger Catawba people, becoming extinct as a tribe.