486 Avenue over South Fork Yellow Bank R
FairGrant County, South Dakota · 4.5E & 2.3N Revillo · Structure no. 000000026370192
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 90 ft
- 2 main spans
- Daily traffic
- 207
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
486 Avenue over South Fork Yellow Bank R is a prestressed concrete tee beam carrying 486 Avenue over South Fork Yellow Bank R in Grant County, South Dakota. It was built in 1973, so it is 52 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 207 vehicles a day, roughly 2% of them trucks, projected to reach 207 by 2032. The structure is 90 ft (27.4 m) long and 31 ft wide. If it were closed, the detour would be 8.7 mi (14 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 486 Avenue over South Fork Yellow Bank R built?
It was built in 1973, making it 52 years old in 2025.
What condition is 486 Avenue over South Fork Yellow Bank R 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 September 2024.
How much traffic does 486 Avenue over South Fork Yellow Bank R carry?
About 207 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 486 Avenue over South Fork Yellow Bank R?
The structure is 90 ft (27.4 m) long with a longest span of 45 ft (13.7 m) and a deck 31 ft wide.
Who owns 486 Avenue over South Fork Yellow Bank R?
It is owned by the County Highway Agency.