NB I-29 over Robinson Ditch
Good Condition15 years old7,800 vehicles/day
Location
| State | Iowa |
| County | Monona |
| Location | 4.1 Mi. S Of Jct. Ia 141 |
| Carries | NB I-29 |
| Crosses | Robinson Ditch |
| Coordinates | 42.17105, -96.22962 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 103.0 ft (31.4 m) |
| Max Span | 39.0 ft (11.9 m) |
| Deck Width | 43.3 ft (13.2 m) |
| Deck Area | 414.5 sq m |
| Main Spans | 3 |
| Year Built | 2011 |
Traffic
| Avg Daily Traffic | 7,800 (2022) |
| Truck Traffic | 31% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000037351 |