479th Avenue over Big Sioux River
FairMoody County, South Dakota · 1.4S & 8W of Ward · Structure no. 000000051130044
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected July 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 126 ft
- 2 main spans
- Daily traffic
- 45
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
479th Avenue over Big Sioux River is a prestressed concrete tee beam carrying 479th Avenue over Big Sioux River in Moody County, South Dakota. It was built in 1978, so it is 47 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 45 vehicles a day, roughly 2% of them trucks, projected to reach 45 by 2032. The structure is 126 ft (38.3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 479th Avenue over Big Sioux River built?
It was built in 1978, making it 47 years old in 2025.
What condition is 479th Avenue over Big Sioux River 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 July 2024.
How much traffic does 479th Avenue over Big Sioux River carry?
About 45 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 479th Avenue over Big Sioux River?
The structure is 126 ft (38.3 m) long with a longest span of 65 ft (19.8 m) and a deck 23 ft wide.
Who owns 479th Avenue over Big Sioux River?
It is owned by the County Highway Agency.