Structure 53 · Alger County, MI
Carries M-77 over W Br Sucker River, 6.2 Mi S Of Grand Marais.
23 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 tee-beam bridge.
| State | Michigan |
| County | Alger |
| Location | 6.2 Mi S Of Grand Marais |
| Carries | M-77 |
| Crosses | W Br Sucker River |
| Coordinates | 46.58990, -86.00881 |
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 23.0 ft (7 m) |
| Max Span | 23.0 ft (7 m) |
| Deck Width | 34.4 ft (10.5 m) |
| Deck Area | 73.5 sq m |
| Main Spans | 1 |
| Year Built | 1928 |
| Avg Daily Traffic | 406 (2007) |
| Truck Traffic | 14% |
| Lanes On Bridge | 2 |
| 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 | Unknown |
| Structure Number | 000000000000053 |
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.