478th Avenue over Brookfield Creek
FairMoody County, South Dakota · 0.7S of Trent · Structure no. 000000051120207
- Built
- 1993
- 32 years old
- Condition
- Fair
- inspected August 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 40 ft
- 1 main span
- Daily traffic
- 45
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
478th Avenue over Brookfield Creek is a prestressed concrete tee beam carrying 478th Avenue over Brookfield Creek in Moody County, South Dakota. It was built in 1993, so it is 32 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 45 vehicles a day, projected to reach 50 by 2042. The structure is 40 ft (12.3 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 | 7 Good | Some minor problems. |
| 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 478th Avenue over Brookfield Creek built?
It was built in 1993, making it 32 years old in 2025.
What condition is 478th Avenue over Brookfield 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 478th Avenue over Brookfield Creek carry?
About 45 vehicles per day (2022 count).
How long is 478th Avenue over Brookfield Creek?
The structure is 40 ft (12.3 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.
Who owns 478th Avenue over Brookfield Creek?
It is owned by the County Highway Agency.