US 20 over Drainage Ditch #4
Good Condition58 years old9,600 vehicles/day
Location
| State | Iowa |
| County | Hamilton |
| Location | 1.8 Miles East Of US 69 |
| Carries | US 20 |
| Crosses | Drainage Ditch #4 |
| Coordinates | 42.44887, -93.60477 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 6 (Satisfactory) |
| Culvert | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 27.9 ft (8.5 m) |
| Max Span | 12.1 ft (3.7 m) |
| Deck Area | 207.4 sq m |
| Main Spans | 2 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 9,600 (2022) |
| Truck Traffic | 27% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000026610 |