486th Avenue over Flandreau Creek
FairMoody County, South Dakota · 5E & 0.9N of Flandreau · Structure no. 000000051200092
- Built
- 1956
- 69 years old
- Condition
- Fair
- inspected August 2024
- Type
- Slab
- Concrete Continuous
- Length
- 128 ft
- 4 main spans
- Daily traffic
- 125
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
486th Avenue over Flandreau Creek is a concrete continuous slab carrying 486th Avenue over Flandreau Creek in Moody County, South Dakota. It was built in 1956, so it is 69 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 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 125 vehicles a day, roughly 3% of them trucks, projected to reach 125 by 2032. The structure is 128 ft (39 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 486th Avenue over Flandreau Creek built?
It was built in 1956, making it 69 years old in 2025.
What condition is 486th Avenue over Flandreau 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 August 2024.
How much traffic does 486th Avenue over Flandreau Creek carry?
About 125 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is 486th Avenue over Flandreau Creek?
The structure is 128 ft (39 m) long with a longest span of 35 ft (10.7 m) and a deck 28 ft wide.
Who owns 486th Avenue over Flandreau Creek?
It is owned by the County Highway Agency.