Where is the outer coastal plain of South Carolina?

The Outer Coastal Plain of South Carolina is a narrow strip of land that begins near the mouth of the Pee Dee River and extends southsouthwestward to the Savannah River. It includes some of the most fertile and productive agricultural land in the state. The Outer Coastal Plain is characterized by flat, sandy terrain with occasional rolling hills. It is also home to some of the state's most important natural resources, including several national wildlife refuges and state parks.