478 Ave over I029
FairUnion County, South Dakota · 1.3 SE of Elk Point · Structure no. 000000064080296
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected February 2025
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 365 ft
- 4 main spans
- Daily traffic
- 65
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
478 Ave over I029 is a concrete continuous box beam or girders - multiple carrying 478 Ave over I029 in Union County, South Dakota. It was built in 1961, so it is 64 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 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 65 vehicles a day, roughly 2% of them trucks, projected to reach 65 by 2043. The structure is 365 ft (111.3 m) long and 28 ft wide.
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 478 Ave over I029 built?
It was built in 1961, making it 64 years old in 2025.
What condition is 478 Ave over I029 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 February 2025.
How much traffic does 478 Ave over I029 carry?
About 65 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is 478 Ave over I029?
The structure is 365 ft (111.3 m) long with a longest span of 100 ft (30.5 m) and a deck 28 ft wide.
Who owns 478 Ave over I029?
It is owned by the State Highway Agency.