475th Avenue over Trib. to Big Sioux River
FairMoody County, South Dakota · 1.8N & 12W of Ward · Structure no. 000000051090012
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected July 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 50 ft
- 1 main span
- Daily traffic
- 67
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
475th Avenue over Trib. to Big Sioux River is a prestressed concrete tee beam carrying 475th Avenue over Trib. to Big Sioux River in Moody County, South Dakota. It was built in 1980, so it is 45 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 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 67 vehicles a day, roughly 2% of them trucks, projected to reach 83 by 2032. The structure is 50 ft (15.2 m) long and 31 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 475th Avenue over Trib. to Big Sioux River built?
It was built in 1980, making it 45 years old in 2025.
What condition is 475th Avenue over Trib. to 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 475th Avenue over Trib. to Big Sioux River carry?
About 67 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 475th Avenue over Trib. to Big Sioux River?
The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 31 ft wide.
Who owns 475th Avenue over Trib. to Big Sioux River?
It is owned by the County Highway Agency.