IRR US012 over Ck
FairCorson County, South Dakota · 5.5 SE of Mclaughlin · Structure no. 000000016617132
- Built
- 1964
- 61 years old
- Condition
- Fair
- inspected January 2024
- Type
- Slab
- Concrete Continuous
- Length
- 117 ft
- 5 main spans
- Daily traffic
- 636
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR US012 over Ck is a concrete continuous slab carrying IRR US012 over Ck in Corson County, South Dakota. It was built in 1964, so it is 61 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 636 vehicles a day, roughly 16% of them trucks, projected to reach 831 by 2044. The structure is 117 ft (35.7 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 | 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 IRR US012 over Ck built?
It was built in 1964, making it 61 years old in 2025.
What condition is IRR US012 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 January 2024.
How much traffic does IRR US012 over Ck carry?
About 636 vehicles per day (2024 count), of which roughly 16% are trucks.
How long is IRR US012 over Ck?
The structure is 117 ft (35.7 m) long with a longest span of 23 ft (7.1 m) and a deck 34 ft wide.
Who owns IRR US012 over Ck?
It is owned by the State Highway Agency.