US 18 over Boone River
Fair Condition67 years old2,980 vehicles/day
Location
| State | Iowa |
| County | Hancock |
| Location | 4.7 Mi. W Of Jct. SR R35 |
| Carries | US 18 |
| Crosses | Boone River |
| Coordinates | 43.09739, -93.89413 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 91.9 ft (28 m) |
| Max Span | 35.1 ft (10.7 m) |
| Deck Width | 36.1 ft (11 m) |
| Deck Area | 308 sq m |
| Main Spans | 3 |
| Year Built | 1959 |
Traffic
| Avg Daily Traffic | 2,980 (2022) |
| Truck Traffic | 20% |
| 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 | 000000000026770 |