Ia 9 over Rock River
Fair Condition52 years old3,920 vehicles/day
Location
| State | Iowa |
| County | Lyon |
| Location | 0.5 Mi. E Of E Jct. US 75 |
| Carries | Ia 9 |
| Crosses | Rock River |
| Coordinates | 43.43183, -96.16510 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 353.0 ft (107.6 m) |
| Max Span | 113.8 ft (34.7 m) |
| Deck Width | 70.5 ft (21.5 m) |
| Deck Area | 2313.4 sq m |
| Main Spans | 4 |
| Year Built | 1974 |
Traffic
| Avg Daily Traffic | 3,920 (2022) |
| Truck Traffic | 13% |
| Lanes On Bridge | 4 |
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 | 000000000034645 |