13 bridges with vertical clearance data on US-521 in South Carolina. Lowest: 151.6ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 151.6ft | Us 521 | U.S.521 | 1.0 Mi N Of Lancaster | 1965 | Map |
| 181.8ft | Us 521 | Us 521 Bus | 4 Mi S Of Andrews | 2006 | Map |
| 192.6ft | Us 521 Nb | Sc 41 Bus | Andrews | 2006 | Map |
| 198.8ft | Us 521 Sb | Sc 41 Bus | Andrews | 2006 | Map |
| 214.9ft | Us 521 | S.C.L. Railroad | 0.1 Mi S Of Salters | 1937 | Map |
| 227.4ft | Us 521 Sb | Rr Csxt | 11.5 Mi N Of Lancaster | 1929 | Map |
| 231.0ft | Us 521 | Rr Csxt | City Of Sumter | 1981 | Map |
| 246.7ft | Us 521 Nb | Scl Railroad | 12 Mi N Lancaster | 1977 | Map |
| 247.7ft | Us 521 Nb | Csx Railroad | Andrews | 2006 | Map |
| 250.0ft | Us 521 Sb | Csx Railroad | Andrews | 2006 | Map |
| 259.8ft | Us 521 | Shot Pouch Branch | 1 Mi Nw Of Sumter | 1977 | Map |
| 999.0ft | Us 521 | Big Pine Tree Creek | 1Mi S Of Camden | 2022 | Map |
| 999.0ft | Us 521 Nb | Cane Creek | 3.7 Mi N Of Lancaster | 2021 | Map |