474th Avenue over Big Slough Creek
PoorPosted for loadRoberts County, South Dakota · 1E & 1N of Rosholt · Structure no. 000000055250037
- Built
- 1960
- 65 years old
- Condition
- Poor
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 25 ft
- 1 main span
- Daily traffic
- 30
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
474th Avenue over Big Slough Creek is a wood or timber stringer/multi-beam or girder carrying 474th Avenue over Big Slough Creek in Roberts 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 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. Its operating status is: posted for load restriction.
It carries about 30 vehicles a day, roughly 2% of them trucks, projected to reach 30 by 2032. The structure is 25 ft (7.5 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, 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 474th Avenue over Big Slough Creek built?
It was built in 1960, making it 65 years old in 2025.
What condition is 474th Avenue over Big Slough Creek 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 June 2024.
How much traffic does 474th Avenue over Big Slough Creek carry?
About 30 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 474th Avenue over Big Slough Creek?
The structure is 25 ft (7.5 m) long with a longest span of 23 ft (7 m) and a deck 25 ft wide.
Who owns 474th Avenue over Big Slough Creek?
It is owned by the County Highway Agency.