M-46 M-66 over Flat River
Fair Condition89 years old6,822 vehicles/day
Location
| State | Michigan |
| County | Montcalm |
| Location | 0.5 Mi SE Of W Jct M-66 |
| Carries | M-46 M-66 |
| Crosses | Flat River |
| Coordinates | 43.42453, -85.14424 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 44.9 ft (13.7 m) |
| Max Span | 44.9 ft (13.7 m) |
| Deck Width | 38.7 ft (11.8 m) |
| Deck Area | 161.7 sq m |
| Main Spans | 1 |
| Year Built | 1937 |
Traffic
| Avg Daily Traffic | 6,822 (2007) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000007445 |