IRR SD034 over Cheyenne Rv
PoorHaakon County, South Dakota · Ziebach CO Line · Structure no. 000000028035151
- Built
- 1962
- 63 years old
- Condition
- Poor
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,204 ft
- 9 main spans
- Daily traffic
- 567
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR SD034 over Cheyenne Rv is a steel continuous stringer/multi-beam or girder carrying IRR SD034 over Cheyenne Rv in Haakon 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 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 567 vehicles a day, roughly 35% of them trucks, projected to reach 904 by 2044. The structure is 1,204 ft (367 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR SD034 over Cheyenne Rv built?
It was built in 1962, making it 63 years old in 2025.
What condition is IRR SD034 over Cheyenne Rv 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 February 2024.
How much traffic does IRR SD034 over Cheyenne Rv carry?
About 567 vehicles per day (2024 count), of which roughly 35% are trucks.
How long is IRR SD034 over Cheyenne Rv?
The structure is 1,204 ft (367 m) long with a longest span of 140 ft (42.7 m) and a deck 32 ft wide.
Who owns IRR SD034 over Cheyenne Rv?
It is owned by the State Highway Agency.