The Santee River Basin encompasses eleven (11) watersheds
and 1,280 square miles. The Santee River originates in the Upper
Coastal Plain region, giving way to the Lower Coastal Plain and
Coastal Zone regions. It includes nearly one million acres. There
are a total of 976 stream miles, 94,668 acres of lake waters,
and 5,276 acres of estuarine areas in the Santee River Basin.
The Santee River is formed from the confluence of the Congaree
and Wateree Rivers and flows through Lake Marion. It is diverted
in lower Lake Marion, and either flows out of the Santee Dam
to eventually drain into the Atlantic Ocean via the South Santee
River and the North Santee River, or is channeled along a 7-1/2
mile diversion canal to fill Lake Moultrie. After flowing through
the Santee Dam, the Santee River is joined by the Rediversion
Canal connecting Lake Moultrie and the lower Santee River.