170th ST over Des Moines River
Fair Condition47 years old3,132 vehicles/day
Location
| State | Iowa |
| County | Webster |
| Location | 089291205 |
| Carries | 170th ST |
| Crosses | Des Moines River |
| Coordinates | 42.54354, -94.21745 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 585.0 ft (178.3 m) |
| Max Span | 96.1 ft (29.3 m) |
| Deck Width | 35.1 ft (10.7 m) |
| Deck Area | 1907.8 sq m |
| Main Spans | 6 |
| Year Built | 1979 |
Traffic
| Avg Daily Traffic | 3,132 (2022) |
| Truck Traffic | 13% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2022 |
| Inspection Frequency | Every 48 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000343345 |