30770 478 Ave. over Ck
FairUnion County, South Dakota · 1W & 6.7S Alcester · Structure no. 000000064080107
- Built
- 1940
- 85 years old, rebuilt 1973
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 23 ft
- 1 main span
- Daily traffic
- 35
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
30770 478 Ave. over Ck is a steel stringer/multi-beam or girder carrying 30770 478 Ave. over Ck in Union County, South Dakota. It was built in 1940 and reconstructed in 1973, so it is 85 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 35 vehicles a day, roughly 2% of them trucks, projected to reach 35 by 2032. The structure is 23 ft (7 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 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 30770 478 Ave. over Ck built?
It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1973.
What condition is 30770 478 Ave. over Ck 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 30770 478 Ave. over Ck carry?
About 35 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is 30770 478 Ave. over Ck?
The structure is 23 ft (7 m) long with a longest span of 22 ft (6.6 m) and a deck 22 ft wide.
Who owns 30770 478 Ave. over Ck?
It is owned by the County Highway Agency.