Co Road 451 over N Br Thunder Bay River
Fair Condition32 years old2,126 vehicles/day
Location
| State | Michigan |
| County | Montmorency |
| Location | Sec 1 Montmorency Twp E |
| Carries | Co Road 451 |
| Crosses | N Br Thunder Bay River |
| Coordinates | 45.19163, -83.89145 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 57.7 ft (17.6 m) |
| Max Span | 55.8 ft (17 m) |
| Deck Width | 37.4 ft (11.4 m) |
| Deck Area | 200.6 sq m |
| Main Spans | 1 |
| Year Built | 1994 |
Traffic
| Avg Daily Traffic | 2,126 (2021) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000007546 |