WB US 20 over Maquoketa River
Fair Condition53 years old3,850 vehicles/day
Location
| State | Iowa |
| County | Delaware |
| Location | 1.7 Mi. E Of Jct. Ia 13 |
| Carries | WB US 20 |
| Crosses | Maquoketa River |
| Coordinates | 42.47040, -91.44826 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 355.0 ft (108.2 m) |
| Max Span | 137.1 ft (41.8 m) |
| Deck Width | 43.6 ft (13.3 m) |
| Deck Area | 1439.1 sq m |
| Main Spans | 3 |
| Year Built | 1973 |
Traffic
| Avg Daily Traffic | 3,850 (2022) |
| Truck Traffic | 31% |
| 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 | 000000000602020 |