IRR SD063 over Oak Ck
FairCorson County, South Dakota · 1.8 N of Mclaughlin · Structure no. 000000016580075
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 194 ft
- 3 main spans
- Daily traffic
- 864
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR SD063 over Oak Ck is a prestressed concrete continuous stringer/multi-beam or girder carrying IRR SD063 over Oak Ck in Corson County, South Dakota. It was built in 1980, so it is 45 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 864 vehicles a day, roughly 14% of them trucks, projected to reach 1,128 by 2044. The structure is 194 ft (59.2 m) long and 39 ft wide. If it were closed, the detour would be 95.1 mi (153 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 | 7 Good | Some minor problems. |
| 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 SD063 over Oak Ck built?
It was built in 1980, making it 45 years old in 2025.
What condition is IRR SD063 over Oak 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 May 2023.
How much traffic does IRR SD063 over Oak Ck carry?
About 864 vehicles per day (2024 count), of which roughly 14% are trucks.
How long is IRR SD063 over Oak Ck?
The structure is 194 ft (59.2 m) long with a longest span of 68 ft (20.7 m) and a deck 39 ft wide.
Who owns IRR SD063 over Oak Ck?
It is owned by the State Highway Agency.