Ia 37 over Willow River
Fair Condition67 years old620 vehicles/day
Location
| State | Iowa |
| County | Monona |
| Location | 1.2 Mi. W Of Jct. SR E54 |
| Carries | Ia 37 |
| Crosses | Willow River |
| Coordinates | 41.92151, -95.70180 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 184.1 ft (56.1 m) |
| Max Span | 67.9 ft (20.7 m) |
| Deck Width | 34.1 ft (10.4 m) |
| Deck Area | 583.4 sq m |
| Main Spans | 3 |
| Year Built | 1959 |
Traffic
| Avg Daily Traffic | 620 (2022) |
| Truck Traffic | 26% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000036710 |