Structure 10406 · Tuscola County, MI
Carries M-24 over Gilbert Br Wiscoggin Drn, 3.0 Mi East Of Akron.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.
How ratings work25 ft end to end. 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 box-beam bridge.
| State | Michigan |
| County | Tuscola |
| Location | 3.0 Mi East Of Akron |
| Carries | M-24 |
| Crosses | Gilbert Br Wiscoggin Drn |
| Coordinates | 43.57595, -83.46480 |
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 24.6 ft (7.5 m) |
| Max Span | 23.0 ft (7 m) |
| Deck Width | 34.4 ft (10.5 m) |
| Deck Area | 78.8 sq m |
| Main Spans | 1 |
| Year Built | 1984 |
| Avg Daily Traffic | 1,825 (2007) |
| Truck Traffic | 11% |
| Lanes On Bridge | 2 |
| 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 | Unknown |
| Structure Number | 000000000010406 |
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.