IRR SD063 over Dupree Ck
PoorZiebach County, South Dakota · 1.7 N Haakon CO Line · Structure no. 000000069383519
- Built
- 1961
- 64 years old
- Condition
- Poor
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 118 ft
- 3 main spans
- Daily traffic
- 590
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR SD063 over Dupree Ck is a steel stringer/multi-beam or girder carrying IRR SD063 over Dupree Ck in Ziebach County, South Dakota. It was built in 1961, so it is 64 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 590 vehicles a day, roughly 8% of them trucks, projected to reach 894 by 2044. The structure is 118 ft (36.1 m) long and 32 ft wide.
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 SD063 over Dupree Ck built?
It was built in 1961, making it 64 years old in 2025.
What condition is IRR SD063 over Dupree 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 January 2024.
How much traffic does IRR SD063 over Dupree Ck carry?
About 590 vehicles per day (2024 count), of which roughly 8% are trucks.
How long is IRR SD063 over Dupree Ck?
The structure is 118 ft (36.1 m) long with a longest span of 38 ft (11.5 m) and a deck 32 ft wide.
Who owns IRR SD063 over Dupree Ck?
It is owned by the State Highway Agency.