Structure 864 · Georgetown County, SC
Carries Sc 261 over Bosser Swamp, 20 Mi N Georgetown.
A culvert 22 ft across with 2 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 | Georgetown |
| Location | 20 Mi N Georgetown |
| Carries | Sc 261 |
| Crosses | Bosser Swamp |
| Coordinates | 33.68263, -79.32955 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 22.0 ft (6.7 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 37.7 ft (11.5 m) |
| Deck Area | 77.0 sq m |
| Main Spans | 2 |
| Year Built | 1938 |
| Avg Daily Traffic | 1,100 (2023) |
| Truck Traffic | 13% |
| Lanes On Bridge | 2 |
| Last Inspection | December 2024 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000000864 |
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.