IRR - S 438 over E Fork Porcupine Creek
FairValley County, Montana · 27M N Nashua · Structure no. S00438025+02001
- Built
- 1983
- 42 years old
- Condition
- Fair
- inspected February 2024
- Type
- Culvert
- Steel
- Length
- 25 ft
- 2 main spans
- Daily traffic
- 77
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - S 438 over E Fork Porcupine Creek is a steel culvert carrying IRR - S 438 over E Fork Porcupine Creek in Valley County, Montana. It was built in 1983, so it is 42 years old, younger than the Montana average of 47 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 77 vehicles a day, roughly 1% of them trucks, projected to reach 81 by 2043. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 87 mi (140 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR - S 438 over E Fork Porcupine Creek built?
It was built in 1983, making it 42 years old in 2025.
What condition is IRR - S 438 over E Fork 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 February 2024.
How much traffic does IRR - S 438 over E Fork Porcupine Creek carry?
About 77 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is IRR - S 438 over E Fork Porcupine Creek?
The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m).
Who owns IRR - S 438 over E Fork Porcupine Creek?
It is owned by the State Highway Agency.