476th Avenue over Big Slough Creek
PoorPosted for loadRoberts County, South Dakota · 3E & 1.4N of Rosholt · Structure no. 000000055270036
- Built
- 1930
- 95 years old, rebuilt 1970
- Condition
- Poor
- inspected June 2024
- Type
- Channel Beam
- Concrete
- Length
- 24 ft
- 1 main span
- Daily traffic
- 22
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
476th Avenue over Big Slough Creek is a concrete channel beam carrying 476th Avenue over Big Slough Creek in Roberts County, South Dakota. It was built in 1930 and reconstructed in 1970, 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. Its operating status is: posted for load restriction.
It carries about 22 vehicles a day, roughly 2% of them trucks, projected to reach 22 by 2032. The structure is 24 ft (7.3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 476th Avenue over Big Slough Creek built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1970.
What condition is 476th 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 476th Avenue over Big Slough Creek carry?
About 22 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 476th Avenue over Big Slough Creek?
The structure is 24 ft (7.3 m) long with a longest span of 23 ft (6.9 m) and a deck 25 ft wide.
Who owns 476th Avenue over Big Slough Creek?
It is owned by the County Highway Agency.