US 21

Blue Ridge Parkway Bridge (Alleghany County, North Carolina)
Built 1938
Concrete arch bridge over Blue Ridge Parkway on US 21
Open to traffic

Harbor River Bridge (Beaufort County, South Carolina)
Built 1939
Swing bridge over Harbor River on US 21
Open to traffic

I-77 US 21 Bridge (York County, South Carolina)
Built 1975
Steel rigid frame bridge over I-77 on US 21
Open to traffic

Woods Memorial Bridge (Beaufort County, South Carolina)
Built 1960
Swing bridge over Beaufort River on Business US 21 in Beaufort
Open to traffic