IRR I029 N over 458 Ave (fas)
FairRoberts County, South Dakota · 1.6 SW Sd 15 Interch · Structure no. 000000055090380
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 291 ft
- 3 main spans
- Daily traffic
- 2,785
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR I029 N over 458 Ave (fas) is a steel continuous stringer/multi-beam or girder carrying IRR I029 N over 458 Ave (fas) 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 2,785 vehicles a day, roughly 51% of them trucks, projected to reach 3,459 by 2044. The structure is 291 ft (88.7 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
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR I029 N over 458 Ave (fas) built?
It was built in 1977, making it 48 years old in 2025.
What condition is IRR I029 N over 458 Ave (fas) in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.
How much traffic does IRR I029 N over 458 Ave (fas) carry?
About 2,785 vehicles per day (2024 count), of which roughly 51% are trucks.
How long is IRR I029 N over 458 Ave (fas)?
The structure is 291 ft (88.7 m) long with a longest span of 112 ft (34.1 m) and a deck 43 ft wide.
Who owns IRR I029 N over 458 Ave (fas)?
It is owned by the State Highway Agency.