IRR I029 N over Drainage Ditch
FairRoberts County, South Dakota · 5.5 NE Sd 10 Interch · Structure no. 000000055140140
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected July 2024
- Type
- Slab
- Concrete Continuous
- Length
- 80 ft
- 3 main spans
- Daily traffic
- 2,570
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR I029 N over Drainage Ditch is a concrete continuous slab carrying IRR I029 N over Drainage Ditch in Roberts County, South Dakota. It was built in 1980, so it is 45 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 2,570 vehicles a day, roughly 43% of them trucks, projected to reach 3,192 by 2044. The structure is 80 ft (24.4 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. |
| Channel and channel protection | 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 Drainage Ditch built?
It was built in 1980, making it 45 years old in 2025.
What condition is IRR I029 N over Drainage Ditch 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 July 2024.
How much traffic does IRR I029 N over Drainage Ditch carry?
About 2,570 vehicles per day (2024 count), of which roughly 43% are trucks.
How long is IRR I029 N over Drainage Ditch?
The structure is 80 ft (24.4 m) long with a longest span of 28 ft (8.5 m) and a deck 43 ft wide.
Who owns IRR I029 N over Drainage Ditch?
It is owned by the State Highway Agency.