US 18 over Old Channel Rock River
Good Condition37 years old3,160 vehicles/day
Location
| State | Iowa |
| County | Sioux |
| Location | 0.7 Mi. W Of Jct SR K24 |
| Carries | US 18 |
| Crosses | Old Channel Rock River |
| Coordinates | 43.19971, -96.34743 |
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 | 204.1 ft (62.2 m) |
| Max Span | 82.0 ft (25 m) |
| Deck Width | 43.3 ft (13.2 m) |
| Deck Area | 821.0 sq m |
| Main Spans | 3 |
| Year Built | 1989 |
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 | 000000000048221 |