M-56 over I-80
Good Condition61 years old159 vehicles/day
Location
| State | Iowa |
| County | Cass |
| Location | At Jct. SR M-56 |
| Carries | M-56 |
| Crosses | I-80 |
| Coordinates | 41.49683, -95.11801 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 227.0 ft (69.2 m) |
| Max Span | 68.9 ft (21 m) |
| Deck Width | 32.5 ft (9.9 m) |
| Deck Area | 685.1 sq m |
| Main Spans | 4 |
| Year Built | 1965 (reconstructed 2014) |
Traffic
| Avg Daily Traffic | 159 (2022) |
| Truck Traffic | 7% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 323 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000017970 |