US012 over Antelope Ck
FairBrown County, South Dakota · 1.6 E JCT Sd 37 · Structure no. 000000007312340
- Built
- 1972
- 53 years old, rebuilt 2002
- Condition
- Fair
- inspected June 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 38 ft
- 3 main spans
- Daily traffic
- 3,468
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US012 over Antelope Ck is a concrete continuous culvert carrying US012 over Antelope Ck in Brown County, South Dakota. It was built in 1972 and reconstructed in 2002, so it is 53 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 3,468 vehicles a day, roughly 23% of them trucks, projected to reach 4,522 by 2043. The structure is 38 ft (11.7 m) long. If it were closed, the detour would be 32.9 mi (53 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US012 over Antelope Ck built?
It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2002.
What condition is US012 over 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 June 2024.
How much traffic does US012 over Antelope Ck carry?
About 3,468 vehicles per day (2023 count), of which roughly 23% are trucks.
How long is US012 over Antelope Ck?
The structure is 38 ft (11.7 m) long with a longest span of 12 ft (3.8 m).
Who owns US012 over Antelope Ck?
It is owned by the State Highway Agency.