IRR I029 N over 146 ST
Good Condition49 years old3,650 vehicles/day
Location
| State | South Dakota |
| County | Grant |
| Location | 2 S Roberts Co Line |
| Carries | IRR I029 N |
| Crosses | 146 ST |
| Coordinates | 45.26786, -97.05160 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 119.1 ft (36.3 m) |
| Max Span | 42.7 ft (13 m) |
| Deck Width | 42.7 ft (13 m) |
| Deck Area | 471.9 sq m |
| Main Spans | 3 |
| Year Built | 1977 |
Traffic
| Avg Daily Traffic | 3,650 (2024) |
| Truck Traffic | 40% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000026085040 |