IRR SD015 over I029
FairRoberts County, South Dakota · I 29 & Sd 15 Interchange · Structure no. 000000055100367
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 483 ft
- 4 main spans
- Daily traffic
- 132
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR SD015 over I029 is a steel continuous stringer/multi-beam or girder carrying IRR SD015 over I029 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 132 vehicles a day, roughly 5% of them trucks, projected to reach 258 by 2044. The structure is 483 ft (147.3 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 SD015 over I029 built?
It was built in 1977, making it 48 years old in 2025.
What condition is IRR SD015 over I029 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 SD015 over I029 carry?
About 132 vehicles per day (2024 count), of which roughly 5% are trucks.
How long is IRR SD015 over I029?
The structure is 483 ft (147.3 m) long with a longest span of 139 ft (42.4 m) and a deck 43 ft wide.
Who owns IRR SD015 over I029?
It is owned by the State Highway Agency.