Structure 13129 · Madison County, AL
Carries US 431 over Branch, 4.5 Mi S Flint River.
A culvert 25 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 | Alabama |
| County | Madison |
| Location | 4.5 Mi S Flint River |
| Carries | US 431 |
| Crosses | Branch |
| Coordinates | 34.57667, -86.44833 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 24.9 ft (7.6 m) |
| Max Span | 8.9 ft (2.7 m) |
| Deck Area | 111.0 sq m |
| Main Spans | 3 |
| Year Built | 1957 (reconstructed 1984) |
| Avg Daily Traffic | 16,807 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 4 |
| Last Inspection | July 2024 |
| 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 | 013129 |
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.