S-21-86 over Big Swamp
Fair Condition56 years old1,050 vehicles/day
Location
| State | South Carolina |
| County | Florence |
| Location | 3.5 SE Pamplico |
| Carries | S-21-86 |
| Crosses | Big Swamp |
| Coordinates | 33.94480, -79.55876 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | Unknown |
Physical Characteristics
| Material | Concrete |
| Design | Slab |
| Total Length | 105.0 ft (32 m) |
| Max Span | 15.1 ft (4.6 m) |
| Deck Width | 27.6 ft (8.4 m) |
| Deck Area | 268.8 sq m |
| Main Spans | 7 |
| Year Built | 1970 (reconstructed 1995) |
Traffic
| Avg Daily Traffic | 1,050 (2023) |
| Truck Traffic | 18% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 323 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000005724 |