IRR I029 N over 460 Ave
GoodRoberts County, South Dakota · 1.9 NE Sd 15 Interch · Structure no. 000000055109350
- Built
- 1977
- 48 years old
- Condition
- Good
- inspected July 2024
- Type
- Slab
- Concrete Continuous
- Length
- 99 ft
- 3 main spans
- Daily traffic
- 2,675
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR I029 N over 460 Ave is a concrete continuous slab carrying IRR I029 N over 460 Ave in Roberts County, South Dakota. It was built in 1977, so it is 48 years old, younger than the South Dakota average of 48.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 2,675 vehicles a day, roughly 55% of them trucks, projected to reach 3,322 by 2044. The structure is 99 ft (30.3 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR I029 N over 460 Ave built?
It was built in 1977, making it 48 years old in 2025.
What condition is IRR I029 N over 460 Ave in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.
How much traffic does IRR I029 N over 460 Ave carry?
About 2,675 vehicles per day (2024 count), of which roughly 55% are trucks.
How long is IRR I029 N over 460 Ave?
The structure is 99 ft (30.3 m) long with a longest span of 35 ft (10.8 m) and a deck 43 ft wide.
Who owns IRR I029 N over 460 Ave?
It is owned by the State Highway Agency.