477 Avenue over North Fork Whetstone Rv
FairPosted for loadGrant County, South Dakota · 6N & 1W Milbank · Structure no. 000000026280010
- Built
- 1936
- 89 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 62 ft
- 2 main spans
- Daily traffic
- 52
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
477 Avenue over North Fork Whetstone Rv is a steel stringer/multi-beam or girder carrying 477 Avenue over North Fork Whetstone Rv in Grant County, South Dakota. It was built in 1936, so it is 89 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. Its operating status is: posted for load restriction.
It carries about 52 vehicles a day, roughly 2% of them trucks, projected to reach 52 by 2032. The structure is 62 ft (18.9 m) long and 24 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 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 477 Avenue over North Fork Whetstone Rv built?
It was built in 1936, making it 89 years old in 2025.
What condition is 477 Avenue over North 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 North Fork Whetstone Rv carry?
About 52 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 477 Avenue over North Fork Whetstone Rv?
The structure is 62 ft (18.9 m) long with a longest span of 31 ft (9.4 m) and a deck 24 ft wide.
Who owns 477 Avenue over North Fork Whetstone Rv?
It is owned by the County Highway Agency.