I-75 SB over Carp River
Fair Condition62 years old4,400 vehicles/day
Location
| State | Michigan |
| County | Mackinac |
| Location | 4.6 Mi N Of M-123 |
| Carries | I-75 SB |
| Crosses | Carp River |
| Coordinates | 46.02364, -84.71246 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 202.8 ft (61.8 m) |
| Max Span | 67.9 ft (20.7 m) |
| Deck Width | 43.0 ft (13.1 m) |
| Deck Area | 809.6 sq m |
| Main Spans | 3 |
| Year Built | 1964 |
Traffic
| Avg Daily Traffic | 4,400 (2010) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000005938 |