IRR US012 over Hay Ck
FairCorson County, South Dakota · 6.7 E Perkins CO Line · Structure no. 000000016072011
- Built
- 1962
- 63 years old
- Condition
- Fair
- inspected December 2024
- Type
- Slab
- Concrete Continuous
- Length
- 80 ft
- 3 main spans
- Daily traffic
- 424
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR US012 over Hay Ck is a concrete continuous slab carrying IRR US012 over Hay Ck in Corson County, South Dakota. It was built in 1962, so it is 63 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 5 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 424 vehicles a day, roughly 24% of them trucks, projected to reach 554 by 2044. The structure is 80 ft (24.4 m) long and 34 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR US012 over Hay Ck built?
It was built in 1962, making it 63 years old in 2025.
What condition is IRR US012 over Hay 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 December 2024.
How much traffic does IRR US012 over Hay Ck carry?
About 424 vehicles per day (2024 count), of which roughly 24% are trucks.
How long is IRR US012 over Hay Ck?
The structure is 80 ft (24.4 m) long with a longest span of 28 ft (8.6 m) and a deck 34 ft wide.
Who owns IRR US012 over Hay Ck?
It is owned by the State Highway Agency.