Ia 31 over Little Sioux River
Fair Condition53 years old1,120 vehicles/day
Location
| State | Iowa |
| County | Woodbury |
| Location | 0.8 Mi S Of Jct US 20 |
| Carries | Ia 31 |
| Crosses | Little Sioux River |
| Coordinates | 42.47029, -95.79716 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 424.9 ft (129.5 m) |
| Max Span | 91.9 ft (28 m) |
| Deck Width | 35.4 ft (10.8 m) |
| Deck Area | 1398.6 sq m |
| Main Spans | 5 |
| Year Built | 1973 |
Traffic
| Avg Daily Traffic | 1,120 (2022) |
| Truck Traffic | 19% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000053181 |