9th LN NW over Spring Valley Canal 047
FairPosted for loadTeton County, Montana · 13M NW Fairfield · Structure no. L50087003+07001
- Built
- 1975
- 50 years old, rebuilt 1992
- Condition
- Fair
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 71 ft
- 3 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
9th LN NW over Spring Valley Canal 047 is a wood or timber stringer/multi-beam or girder carrying 9th LN NW over Spring Valley Canal 047 in Teton County, Montana. It was built in 1975 and reconstructed in 1992, so it is 50 years old, older 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. Its operating status is: posted for load restriction.
It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 71 ft (21.6 m) long and 16 ft wide. If it were closed, the detour would be 24.9 mi (40 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 9th LN NW over Spring Valley Canal 047 built?
It was built in 1975, making it 50 years old in 2025. It was reconstructed in 1992.
What condition is 9th LN NW over Spring Valley Canal 047 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 November 2023.
How much traffic does 9th LN NW over Spring Valley Canal 047 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is 9th LN NW over Spring Valley Canal 047?
The structure is 71 ft (21.6 m) long with a longest span of 29 ft (8.8 m) and a deck 16 ft wide.
Who owns 9th LN NW over Spring Valley Canal 047?
It is owned by the County Highway Agency.