US 20 over Maple River Overflow
Good Condition10 years old5,100 vehicles/day
Location
| State | Iowa |
| County | Ida |
| Location | 4.0 Mi. E Of E Jct. US 59 |
| Carries | US 20 |
| Crosses | Maple River Overflow |
| Coordinates | 42.47473, -95.42536 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 8 (Very Good) |
| Culvert | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 37.7 ft (11.5 m) |
| Max Span | 12.1 ft (3.7 m) |
| Deck Area | 140.3 sq m |
| Main Spans | 3 |
| Year Built | 2016 |
Traffic
| Avg Daily Traffic | 5,100 (2022) |
| Truck Traffic | 33% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000700810 |