IRR US083 over Antelope Ck
FairTodd County, South Dakota · 0.1 S JCT US 18 · Structure no. 000000061300061
- Built
- 1981
- 44 years old
- Condition
- Fair
- inspected October 2023
- Type
- Slab
- Concrete Continuous
- Length
- 112 ft
- 3 main spans
- Daily traffic
- 2,544
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR US083 over Antelope Ck is a concrete continuous slab carrying IRR US083 over Antelope Ck in Todd County, South Dakota. It was built in 1981, so it is 44 years old, younger 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 2,544 vehicles a day, roughly 11% of them trucks, projected to reach 3,714 by 2044. The structure is 112 ft (34.1 m) long and 66 ft wide. If it were closed, the detour would be 29.8 mi (48 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR US083 over Antelope Ck built?
It was built in 1981, making it 44 years old in 2025.
What condition is IRR US083 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 October 2023.
How much traffic does IRR US083 over Antelope Ck carry?
About 2,544 vehicles per day (2024 count), of which roughly 11% are trucks.
How long is IRR US083 over Antelope Ck?
The structure is 112 ft (34.1 m) long with a longest span of 40 ft (12.1 m) and a deck 66 ft wide.
Who owns IRR US083 over Antelope Ck?
It is owned by the State Highway Agency.