WB US 30 over Silver Ck & Up Rr
Fair Condition56 years old8,550 vehicles/day
Location
| State | Iowa |
| County | Clinton |
| Location | 0.7 Mi. E Of W Jct. US 61 |
| Carries | WB US 30 |
| Crosses | Silver Ck & Up Rr |
| Coordinates | 41.81550, -90.56775 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 424.9 ft (129.5 m) |
| Max Span | 91.9 ft (28 m) |
| Deck Width | 43.6 ft (13.3 m) |
| Deck Area | 1722.3 sq m |
| Main Spans | 6 |
| Year Built | 1970 (reconstructed 1975) |
Traffic
| Avg Daily Traffic | 8,550 (2022) |
| Truck Traffic | 15% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2022 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000602832 |