M-57 over Flat River
Good Condition78 years old11,727 vehicles/day
Location
| State | Michigan |
| County | Montcalm |
| Location | In Greenville |
| Carries | M-57 |
| Crosses | Flat River |
| Coordinates | 43.17751, -85.24773 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 159.8 ft (48.7 m) |
| Max Span | 59.7 ft (18.2 m) |
| Deck Width | 55.8 ft (17 m) |
| Deck Area | 827.9 sq m |
| Main Spans | 3 |
| Year Built | 1948 (reconstructed 2000) |
Traffic
| Avg Daily Traffic | 11,727 (2007) |
| Truck Traffic | 7% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000007431 |