US 18 over Little Sioux Overflow
Fair Condition95 years old4,170 vehicles/day
Location
| State | Iowa |
| County | Clay |
| Location | 3.6 Mi. E Of E Jct. US 71 |
| Carries | US 18 |
| Crosses | Little Sioux Overflow |
| Coordinates | 43.12781, -95.07381 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 7 — Countermeasures installed |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 42.0 ft (12.8 m) |
| Max Span | 40.0 ft (12.2 m) |
| Deck Width | 48.6 ft (14.8 m) |
| Deck Area | 189.4 sq m |
| Main Spans | 1 |
| Year Built | 1931 (reconstructed 1965) |
Traffic
| Avg Daily Traffic | 4,170 (2022) |
| Truck Traffic | 16% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000020350 |