I029 S over Bn RR
FairUnion County, South Dakota · 0.2 N of W Elkpoint Intch · Structure no. 000000064055268
- Built
- 1960
- 65 years old
- Condition
- Fair
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 185 ft
- 3 main spans
- Daily traffic
- 7,235
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I029 S over Bn RR is a steel continuous stringer/multi-beam or girder carrying I029 S over Bn RR in Union County, South Dakota. It was built in 1960, so it is 65 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 7,235 vehicles a day, roughly 39% of them trucks, projected to reach 11,909 by 2044. The structure is 185 ft (56.3 m) long and 46 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I029 S over Bn RR built?
It was built in 1960, making it 65 years old in 2025.
What condition is I029 S over Bn RR 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 January 2025.
How much traffic does I029 S over Bn RR carry?
About 7,235 vehicles per day (2024 count), of which roughly 39% are trucks.
How long is I029 S over Bn RR?
The structure is 185 ft (56.3 m) long with a longest span of 70 ft (21.3 m) and a deck 46 ft wide.
Who owns I029 S over Bn RR?
It is owned by the State Highway Agency.