Lake Norman is fed by the Catawba River, and drains into Mountain Island Lake to the south. It was named after former Duke Power president Norman Atwater Cocke. Lake Norman is sometimes referred to as the "inland sea" of North Carolina; it offers 520 miles (840 km) of shoreline and a surface area of more than 50 square miles (130 km2). Full pond at Lake Norman is 760 feet (230 m) above mean sea level. Interstate 77 and North Carolina Highway 150 cross Lake Norman at different points.