US 521 over Johnsons Swamp
Fair Condition95 years old3,100 vehicles/day
Location
| State | South Carolina |
| County | Williamsburg |
| Location | 1 Mi NW Of Andrews |
| Carries | US 521 |
| Crosses | Johnsons Swamp |
| Coordinates | 33.46615, -79.58358 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 200.1 ft (61 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Width | 44.9 ft (13.7 m) |
| Deck Area | 835.7 sq m |
| Main Spans | 8 |
| Year Built | 1931 (reconstructed 1966) |
Traffic
| Avg Daily Traffic | 3,100 (2023) |
| Truck Traffic | 16% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000000583 |