IRR US018 over Ck
FairCharles Mix County, South Dakota · 0.5 E of US 281 Junction · Structure no. 000000012485180
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected July 2023
- Type
- Slab
- Concrete Continuous
- Length
- 73 ft
- 3 main spans
- Daily traffic
- 387
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR US018 over Ck is a concrete continuous slab carrying IRR US018 over Ck in Charles Mix County, South Dakota. It was built in 1961, so it is 64 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 387 vehicles a day, roughly 16% of them trucks, projected to reach 558 by 2044. The structure is 73 ft (22.4 m) long and 34 ft wide. If it were closed, the detour would be 19.9 mi (32 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 IRR US018 over Ck built?
It was built in 1961, making it 64 years old in 2025.
What condition is IRR US018 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 July 2023.
How much traffic does IRR US018 over Ck carry?
About 387 vehicles per day (2024 count), of which roughly 16% are trucks.
How long is IRR US018 over Ck?
The structure is 73 ft (22.4 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.
Who owns IRR US018 over Ck?
It is owned by the State Highway Agency.