IRR US012 over Claymore Ck
PoorCorson County, South Dakota · 2.4 W Walworth CO Line · Structure no. 000000016725271
- Built
- 1958
- 67 years old
- Condition
- Poor
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 252 ft
- 5 main spans
- Daily traffic
- 1,378
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR US012 over Claymore Ck is a steel stringer/multi-beam or girder carrying IRR US012 over Claymore Ck in Corson County, South Dakota. It was built in 1958, so it is 67 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 1,378 vehicles a day, roughly 16% of them trucks, projected to reach 1,800 by 2044. The structure is 252 ft (76.7 m) long and 32 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Claymore Ck built?
It was built in 1958, making it 67 years old in 2025.
What condition is IRR US012 over Claymore Ck in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.
How much traffic does IRR US012 over Claymore Ck carry?
About 1,378 vehicles per day (2024 count), of which roughly 16% are trucks.
How long is IRR US012 over Claymore Ck?
The structure is 252 ft (76.7 m) long with a longest span of 53 ft (16.1 m) and a deck 32 ft wide.
Who owns IRR US012 over Claymore Ck?
It is owned by the State Highway Agency.