Us-23 SB over I-75 NB
Good Condition69 years old1,148 vehicles/day
Location
| State | Michigan |
| County | Emmet |
| Location | In Mackinaw City |
| Carries | Us-23 SB |
| Crosses | I-75 NB |
| Coordinates | 45.77221, -84.73440 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 200.1 ft (61 m) |
| Max Span | 110.9 ft (33.8 m) |
| Deck Width | 38.1 ft (11.6 m) |
| Deck Area | 707.6 sq m |
| Main Spans | 3 |
| Year Built | 1957 (reconstructed 2022) |
Traffic
| Avg Daily Traffic | 1,148 (2022) |
| Truck Traffic | 7% |
| Lanes On Bridge | 1 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000002453 |