IRR I029 S over SD127
FairRoberts County, South Dakota · Sd 127 & I29 Interchange · Structure no. 000000055175060
- Built
- 1976
- 49 years old
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 221 ft
- 3 main spans
- Daily traffic
- 2,705
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR I029 S over SD127 is a steel continuous stringer/multi-beam or girder carrying IRR I029 S over SD127 in Roberts County, South Dakota. It was built in 1976, so it is 49 years old, older 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 2,705 vehicles a day, roughly 42% of them trucks, projected to reach 3,360 by 2044. The structure is 221 ft (67.4 m) long and 43 ft wide.
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 S over SD127 built?
It was built in 1976, making it 49 years old in 2025.
What condition is IRR I029 S over SD127 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 May 2023.
How much traffic does IRR I029 S over SD127 carry?
About 2,705 vehicles per day (2024 count), of which roughly 42% are trucks.
How long is IRR I029 S over SD127?
The structure is 221 ft (67.4 m) long with a longest span of 92 ft (28 m) and a deck 43 ft wide.
Who owns IRR I029 S over SD127?
It is owned by the State Highway Agency.