473rd Avenue over Big Slough Creek
FairRoberts County, South Dakota · 0.9N of Rosholt · Structure no. 000000055240041
- Built
- 1953
- 72 years old
- Condition
- Fair
- inspected June 2024
- Type
- Slab
- Concrete Continuous
- Length
- 53 ft
- 3 main spans
- Daily traffic
- 620
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
473rd Avenue over Big Slough Creek is a concrete continuous slab carrying 473rd Avenue over Big Slough Creek in Roberts County, South Dakota. It was built in 1953, so it is 72 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 5 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 620 vehicles a day, roughly 3% of them trucks, projected to reach 620 by 2032. The structure is 53 ft (16.3 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 473rd Avenue over Big Slough Creek built?
It was built in 1953, making it 72 years old in 2025.
What condition is 473rd Avenue over Big Slough Creek 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 June 2024.
How much traffic does 473rd Avenue over Big Slough Creek carry?
About 620 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is 473rd Avenue over Big Slough Creek?
The structure is 53 ft (16.3 m) long with a longest span of 20 ft (6.1 m) and a deck 28 ft wide.
Who owns 473rd Avenue over Big Slough Creek?
It is owned by the County Highway Agency.