US 18 over Rock River
Good Condition24 years old3,160 vehicles/day
Location
| State | Iowa |
| County | Sioux |
| Location | 0.3 Mi. W Of Jct SR K24 |
| Carries | US 18 |
| Crosses | Rock River |
| Coordinates | 43.19976, -96.34093 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 419.9 ft (128 m) |
| Max Span | 122.0 ft (37.2 m) |
| Deck Width | 43.3 ft (13.2 m) |
| Deck Area | 1689.6 sq m |
| Main Spans | 4 |
| Year Built | 2002 |
Traffic
| Avg Daily Traffic | 3,160 (2023) |
| Truck Traffic | 19% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000048231 |