Structure 24504503600408 · St. Charles County, LA
Carries I0310 over I-10/I-310/SWAMP, 0.4 M South Of I-10.
4,815 ft end to end, longest span 80 ft: about 13 football fields. 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.
| State | Louisiana |
| County | St. Charles |
| Location | 0.4 M South Of I-10 |
| Carries | I0310 |
| Crosses | I-10/I-310/SWAMP |
| Coordinates | 30.00273, -90.29357 |
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 4815.0 ft (1467.6 m) |
| Max Span | 80.1 ft (24.4 m) |
| Deck Width | 36.1 ft (11 m) |
| Deck Area | 16143.6 sq m |
| Main Spans | 66 |
| Year Built | 1992 |
| Avg Daily Traffic | 15,642 (2021) |
| Truck Traffic | 25% |
| Lanes On Bridge | 1 |
| Lanes Under Bridge | 5 |
| Last Inspection | September 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 | 024504503600408 |
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.