477th Avenue over Big Sioux River
GoodMoody County, South Dakota · 0.5N of Trent · Structure no. 000000051110195
- Built
- 1991
- 34 years old
- Condition
- Good
- inspected August 2024
- Type
- Slab
- Concrete Continuous
- Length
- 222 ft
- 5 main spans
- Daily traffic
- 50
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
477th Avenue over Big Sioux River is a concrete continuous slab carrying 477th Avenue over Big Sioux River in Moody County, South Dakota. It was built in 1991, so it is 34 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 50 vehicles a day, roughly 2% of them trucks, projected to reach 50 by 2032. The structure is 222 ft (67.7 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
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 477th Avenue over Big Sioux River built?
It was built in 1991, making it 34 years old in 2025.
What condition is 477th Avenue over Big Sioux River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.
How much traffic does 477th Avenue over Big Sioux River carry?
About 50 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 477th Avenue over Big Sioux River?
The structure is 222 ft (67.7 m) long with a longest span of 48 ft (14.6 m) and a deck 31 ft wide.
Who owns 477th Avenue over Big Sioux River?
It is owned by the County Highway Agency.