US085 over East Br Antelope Ck
FairButte County, South Dakota · 13.3 S Harding CO Line · Structure no. 000000010249135
- Built
- 1965
- 60 years old
- Condition
- Fair
- inspected March 2024
- Type
- Slab
- Concrete Continuous
- Length
- 140 ft
- 5 main spans
- Daily traffic
- 1,037
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US085 over East Br Antelope Ck is a concrete continuous slab carrying US085 over East Br Antelope Ck in Butte County, South Dakota. It was built in 1965, so it is 60 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 1,037 vehicles a day, roughly 21% of them trucks, projected to reach 1,488 by 2044. The structure is 140 ft (42.7 m) long and 34 ft wide. If it were closed, the detour would be 19.3 mi (31 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 East Br Antelope Ck built?
It was built in 1965, making it 60 years old in 2025.
What condition is US085 over East Br Antelope 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 East Br Antelope Ck carry?
About 1,037 vehicles per day (2024 count), of which roughly 21% are trucks.
How long is US085 over East Br Antelope Ck?
The structure is 140 ft (42.7 m) long with a longest span of 28 ft (8.5 m) and a deck 34 ft wide.
Who owns US085 over East Br Antelope Ck?
It is owned by the State Highway Agency.