IRR SD063 over Cheyenne Rv
FairZiebach County, South Dakota · Ziebach-Haakon CO Line · Structure no. 000000069390535
- Built
- 1981
- 44 years old
- Condition
- Fair
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 2,109 ft
- 12 main spans
- Daily traffic
- 405
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR SD063 over Cheyenne Rv is a steel continuous stringer/multi-beam or girder carrying IRR SD063 over Cheyenne Rv in Ziebach County, South Dakota. It was built in 1981, so it is 44 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 405 vehicles a day, roughly 12% of them trucks, projected to reach 576 by 2044. The structure is 2,109 ft (642.8 m) long and 35 ft wide. If it were closed, the detour would be 49.7 mi (80 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Cheyenne Rv built?
It was built in 1981, making it 44 years old in 2025.
What condition is IRR SD063 over Cheyenne Rv 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 2023.
How much traffic does IRR SD063 over Cheyenne Rv carry?
About 405 vehicles per day (2024 count), of which roughly 12% are trucks.
How long is IRR SD063 over Cheyenne Rv?
The structure is 2,109 ft (642.8 m) long with a longest span of 182 ft (55.5 m) and a deck 35 ft wide.
Who owns IRR SD063 over Cheyenne Rv?
It is owned by the State Highway Agency.