US 75 over Rock River
Fair Condition51 years old2,620 vehicles/day
Location
| State | Iowa |
| County | Lyon |
| Location | 0.2 Mi. N Of S Jct SR A34 |
| Carries | US 75 |
| Crosses | Rock River |
| Coordinates | 43.34808, -96.17595 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 329.1 ft (100.3 m) |
| Max Span | 82.0 ft (25 m) |
| Deck Width | 47.2 ft (14.4 m) |
| Deck Area | 1444.3 sq m |
| Main Spans | 4 |
| Year Built | 1975 |
Traffic
| Avg Daily Traffic | 2,620 (2022) |
| Truck Traffic | 24% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000034521 |