I029 N over Big Sioux Rv
FairUnion County, South Dakota · At Iowa State Line · Structure no. 000000064165405
- Built
- 1963
- 62 years old
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 558 ft
- 3 main spans
- Daily traffic
- 18,090
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I029 N over Big Sioux Rv is a steel continuous stringer/multi-beam or girder carrying I029 N over Big Sioux Rv in Union County, South Dakota. It was built in 1963, so it is 62 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 18,090 vehicles a day, roughly 17% of them trucks, projected to reach 25,453 by 2044. The structure is 558 ft (170.1 m) long and 33 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I029 N over Big Sioux Rv built?
It was built in 1963, making it 62 years old in 2025.
What condition is I029 N over Big Sioux Rv 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 April 2023.
How much traffic does I029 N over Big Sioux Rv carry?
About 18,090 vehicles per day (2024 count), of which roughly 17% are trucks.
How long is I029 N over Big Sioux Rv?
The structure is 558 ft (170.1 m) long with a longest span of 225 ft (68.6 m) and a deck 33 ft wide.
Who owns I029 N over Big Sioux Rv?
It is owned by the State Highway Agency.