477 Avenue over South Fork Whetstone Rv
FairGrant County, South Dakota · 1W & 0.2N Milbank · Structure no. 000000026280068
- Built
- 1989
- 36 years old
- Condition
- Fair
- inspected August 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 30
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
477 Avenue over South Fork Whetstone Rv is a prestressed concrete tee beam carrying 477 Avenue over South Fork Whetstone Rv in Grant County, South Dakota. It was built in 1989, so it is 36 years old, younger 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 6 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 30 vehicles a day, roughly 2% of them trucks, projected to reach 30 by 2032. The structure is 30 ft (9.1 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 477 Avenue over South Fork Whetstone Rv built?
It was built in 1989, making it 36 years old in 2025.
What condition is 477 Avenue over South Fork Whetstone Rv 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 August 2024.
How much traffic does 477 Avenue over South Fork Whetstone Rv carry?
About 30 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 477 Avenue over South Fork Whetstone Rv?
The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 23 ft wide.
Who owns 477 Avenue over South Fork Whetstone Rv?
It is owned by the County Highway Agency.