WB US 20 over Blackhawk Creek
Good Condition42 years old12,400 vehicles/day
Location
| State | Iowa |
| County | Black Hawk |
| Location | 0.7 Mi. W Of Jct. US 63 |
| Carries | WB US 20 |
| Crosses | Blackhawk Creek |
| Coordinates | 42.46124, -92.41703 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 420.9 ft (128.3 m) |
| Max Span | 96.1 ft (29.3 m) |
| Deck Width | 43.3 ft (13.2 m) |
| Deck Area | 1693.6 sq m |
| Main Spans | 5 |
| Year Built | 1984 |
Traffic
| Avg Daily Traffic | 12,400 (2022) |
| Truck Traffic | 14% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000605655 |