Co. Highway over Des Moines River
Fair Condition59 years old3,750 vehicles/day
Location
| State | Iowa |
| County | Marion |
| Location | Red Rock Dam |
| Carries | Co. Highway |
| Crosses | Des Moines River |
| Coordinates | 41.36995, -92.98020 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 236.9 ft (72.2 m) |
| Max Span | 37.1 ft (11.3 m) |
| Deck Width | 36.1 ft (11 m) |
| Deck Area | 794.2 sq m |
| Main Spans | 5 |
| Year Built | 1967 |
Traffic
| Avg Daily Traffic | 3,750 (2020) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | Corps of Engineers |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 240385 |