M-123 over I-75 NB
Poor Condition63 years old1,808 vehicles/day
Location
| State | Michigan |
| County | Mackinac |
| Location | @ M-123 |
| Carries | M-123 |
| Crosses | I-75 NB |
| Coordinates | 45.96438, -84.75186 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 4 (Poor) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 195.9 ft (59.7 m) |
| Max Span | 61.0 ft (18.6 m) |
| Deck Width | 36.7 ft (11.2 m) |
| Deck Area | 668.6 sq m |
| Main Spans | 4 |
| Year Built | 1963 |
Traffic
| Avg Daily Traffic | 1,808 (2007) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000005953 |