The Catawba River (named after the Native American tribes that first settled on the banks) originates in Western North Carolina and the name of the river changes to the Wateree River in South Carolina. The river is approximately 220 miles (350 km) long. It rises in the Appalachian Mountains and drains into Piedmont, and is impounded through a series of reservoirs for flood control and hydroelectricity. The river is named after the Catawba tribe of Native Americans. In their Siouan language, they identified as the Kawahcatawbas, "the people of the river".