Structure 11931 · Mobile County, AL
Carries I-10 EB over Mobile Bay * US 90, East Tunnel Interchange.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 5 of 9.
How ratings work39,728 ft end to end, longest span 154 ft: about 110 football fields, or 7.5 miles. 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 | Alabama |
| County | Mobile |
| Location | East Tunnel Interchange |
| Carries | I-10 EB |
| Crosses | Mobile Bay * US 90 |
| Coordinates | 30.69185, -88.02888 |
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 39728.0 ft (12109.1 m) |
| Max Span | 153.9 ft (46.9 m) |
| Deck Width | 42.0 ft (12.8 m) |
| Deck Area | 154996.5 sq m |
| Main Spans | 2 |
| Year Built | 1978 |
| Avg Daily Traffic | 32,384 (2022) |
| Truck Traffic | 15% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 30 |
| Last Inspection | August 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 | 011931 |
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.