I029 S over Big Sioux Rv
PoorMoody County, South Dakota · 1 S Brookings CO Line · Structure no. 000000051065010
- Built
- 1966
- 59 years old, rebuilt 1996
- Condition
- Poor
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 398 ft
- 4 main spans
- Daily traffic
- 7,985
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I029 S over Big Sioux Rv is a steel continuous stringer/multi-beam or girder carrying I029 S over Big Sioux Rv in Moody County, South Dakota. It was built in 1966 and reconstructed in 1996, so it is 59 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 7,985 vehicles a day, roughly 22% of them trucks, projected to reach 12,089 by 2044. The structure is 398 ft (121.4 m) long and 35 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I029 S over Big Sioux Rv built?
It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1996.
What condition is I029 S over Big Sioux Rv in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.
How much traffic does I029 S over Big Sioux Rv carry?
About 7,985 vehicles per day (2024 count), of which roughly 22% are trucks.
How long is I029 S over Big Sioux Rv?
The structure is 398 ft (121.4 m) long with a longest span of 108 ft (32.9 m) and a deck 35 ft wide.
Who owns I029 S over Big Sioux Rv?
It is owned by the State Highway Agency.