IRR BIA RTE 6 over Porcupine Creek
FairSioux County, North Dakota · 6.8 KM West of Nd HWY 6 · Structure no. 00000000000A046
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected May 2023
- Type
- Channel Beam
- Concrete
- Length
- 94 ft
- 3 main spans
- Daily traffic
- 173
- 2023 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 6 over Porcupine Creek is a concrete channel beam carrying IRR BIA RTE 6 over Porcupine Creek in Sioux County, North Dakota. It was built in 1969, so it is 56 years old, older than the North Dakota average of 48.2 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 173 vehicles a day, roughly 2% of them trucks, projected to reach 311 by 2043. The structure is 94 ft (28.7 m) long and 32 ft wide. If it were closed, the detour would be 52.2 mi (84 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| 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 BIA RTE 6 over Porcupine Creek built?
It was built in 1969, making it 56 years old in 2025.
What condition is IRR BIA RTE 6 over Porcupine Creek 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 BIA RTE 6 over Porcupine Creek carry?
About 173 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is IRR BIA RTE 6 over Porcupine Creek?
The structure is 94 ft (28.7 m) long with a longest span of 31 ft (9.4 m) and a deck 32 ft wide.
Who owns IRR BIA RTE 6 over Porcupine Creek?
It is owned by the Bureau of Indian Affairs.