S-21-1491 over Middle Swamp
Fair Condition38 years old9,300 vehicles/day
Location
| State | South Carolina |
| County | Florence |
| Location | Forest Lake-w Florence |
| Carries | S-21-1491 |
| Crosses | Middle Swamp |
| Coordinates | 34.15694, -79.83526 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | Unknown |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Slab |
| Total Length | 120.1 ft (36.6 m) |
| Max Span | 29.9 ft (9.1 m) |
| Deck Width | 38.4 ft (11.7 m) |
| Deck Area | 428.2 sq m |
| Main Spans | 4 |
| Year Built | 1988 |
Traffic
| Avg Daily Traffic | 9,300 (2023) |
| Truck Traffic | 7% |
| 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 | 000000000008158 |