105 ST over Bois De Sioux R
PoorRoberts County, South Dakota · 7 Miles E. of Rosholt Sd · Structure no. 000000055313050
- Built
- 1930
- 95 years old
- Condition
- Poor
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 51 ft
- 3 main spans
- Daily traffic
- 200
- 2020 count
- Owner
- Federal
- Corps of Engineers (Civil)
About this bridge
105 ST over Bois De Sioux R is a steel stringer/multi-beam or girder carrying 105 ST over Bois De Sioux R in Roberts County, South Dakota. It was built in 1930, so it is 95 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 200 vehicles a day, roughly 40% of them trucks, projected to reach 250 by 2042. The structure is 51 ft (15.5 m) long and 28 ft wide. If it were closed, the detour would be 14.9 mi (24 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 105 ST over Bois De Sioux R built?
It was built in 1930, making it 95 years old in 2025.
What condition is 105 ST over Bois De Sioux R 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 July 2024.
How much traffic does 105 ST over Bois De Sioux R carry?
About 200 vehicles per day (2020 count), of which roughly 40% are trucks.
How long is 105 ST over Bois De Sioux R?
The structure is 51 ft (15.5 m) long with a longest span of 17 ft (5.1 m) and a deck 28 ft wide.
Who owns 105 ST over Bois De Sioux R?
It is owned by the Corps of Engineers (Civil).