Structure 7578 · Muskegon County, MI
Carries Us-31 Br over Hart/mont. Linear Sp Trl, In Whitehall.
22 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 | Muskegon |
| Location | In Whitehall |
| Carries | Us-31 Br |
| Crosses | Hart/mont. Linear Sp Trl |
| Coordinates | 43.40976, -86.34939 |
| Material | Steel |
| Design | Box Beam - Single/Spread |
| Total Length | 21.7 ft (6.6 m) |
| Max Span | 19.4 ft (5.9 m) |
| Deck Width | 73.8 ft (22.5 m) |
| Deck Area | 148.5 sq m |
| Main Spans | 1 |
| Year Built | 1933 (reconstructed 2011) |
| Avg Daily Traffic | 12,781 (2007) |
| Truck Traffic | 3% |
| Lanes On Bridge | 4 |
| Last Inspection | July 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | Not applicable |
| Structure Number | 000000000007578 |
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.