Custom
Seneca River
The Seneca River is created by the confluence of the Keowee River and Twelve mile Creek in northwestern South Carolina, downriver from Lake Keowee near Clemson. It is now entirely inundated by Lake Hartwell, and forms a 21-mile-long (34 km) arm of the lake. The Seneca River and the Tugaloo River join to form the Savannah River.