Structure 15508 · Mobile County, AL
Carries I-165 NB over Multiple Streets Streams, Dn Twn Mob To Chickasaw.
24,513 ft end to end, longest span 196 ft: about 68 football fields, or 4.6 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 | Dn Twn Mob To Chickasaw |
| Carries | I-165 NB |
| Crosses | Multiple Streets Streams |
| Coordinates | 30.75220, -88.09215 |
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 24513.1 ft (7471.6 m) |
| Max Span | 195.9 ft (59.7 m) |
| Deck Width | 58.7 ft (17.9 m) |
| Deck Area | 133741.6 sq m |
| Main Spans | 122 |
| Year Built | 1994 |
| Avg Daily Traffic | 21,946 (2021) |
| Truck Traffic | 9% |
| Lanes On Bridge | 3 |
| Lanes Under Bridge | 48 |
| Last Inspection | February 2025 |
| 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 | 015508 |
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.