US085 over Hay Ck
FairButte County, South Dakota · 0.8 N JCT Sd 34 · Structure no. 000000010097382
- Built
- 1963
- 62 years old
- Condition
- Fair
- inspected March 2024
- Type
- Slab
- Concrete Continuous
- Length
- 152 ft
- 5 main spans
- Daily traffic
- 15,432
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US085 over Hay Ck is a concrete continuous slab carrying US085 over Hay Ck in Butte County, South Dakota. It was built in 1963, so it is 62 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 15,432 vehicles a day, roughly 6% of them trucks, projected to reach 22,145 by 2044. The structure is 152 ft (46.2 m) long and 56 ft wide. If it were closed, the detour would be 69 mi (111 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US085 over Hay Ck built?
It was built in 1963, making it 62 years old in 2025.
What condition is US085 over Hay 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 March 2024.
How much traffic does US085 over Hay Ck carry?
About 15,432 vehicles per day (2024 count), of which roughly 6% are trucks.
How long is US085 over Hay Ck?
The structure is 152 ft (46.2 m) long with a longest span of 31 ft (9.3 m) and a deck 56 ft wide.
Who owns US085 over Hay Ck?
It is owned by the State Highway Agency.