Structure 1710 · Florence County, SC
Carries S-21-147 over Lynches River Swamp, 5mi SW Effingham.
A culvert 21 ft across with 3 openings. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights, so those are drawn as typical for a culvert.
| State | South Carolina |
| County | Florence |
| Location | 5mi SW Effingham |
| Carries | S-21-147 |
| Crosses | Lynches River Swamp |
| Coordinates | 34.03631, -79.76914 |
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 5.9 ft (1.8 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 58.2 sq m |
| Main Spans | 3 |
| Year Built | 1950 |
| Avg Daily Traffic | 1,350 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
| Last Inspection | March 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000001710 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.