485th Avenue over Flandreau Creek
FairPosted for loadMoody County, South Dakota · 4E & 0.2N of Flandreau · Structure no. 000000051190098
- Built
- 1958
- 67 years old
- Condition
- Fair
- inspected August 2024
- Type
- Slab
- Concrete Continuous
- Length
- 163 ft
- 5 main spans
- Daily traffic
- 45
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
485th Avenue over Flandreau Creek is a concrete continuous slab carrying 485th Avenue over Flandreau Creek in Moody County, South Dakota. It was built in 1958, so it is 67 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 45 vehicles a day, roughly 2% of them trucks, projected to reach 45 by 2032. The structure is 163 ft (49.7 m) long and 24 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 | 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 485th Avenue over Flandreau Creek built?
It was built in 1958, making it 67 years old in 2025.
What condition is 485th 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 485th Avenue over Flandreau Creek carry?
About 45 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 485th Avenue over Flandreau Creek?
The structure is 163 ft (49.7 m) long with a longest span of 35 ft (10.7 m) and a deck 24 ft wide.
Who owns 485th Avenue over Flandreau Creek?
It is owned by the County Highway Agency.