S 408 over Usrs Lat Ditch
FairTeton County, Montana · 1M W Fairfield · Structure no. S00408001+03001
- Built
- 1953
- 72 years old
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 38 ft
- 2 main spans
- Daily traffic
- 394
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 408 over Usrs Lat Ditch is a wood or timber stringer/multi-beam or girder carrying S 408 over Usrs Lat Ditch in Teton County, Montana. It was built in 1953, so it is 72 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 6 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 394 vehicles a day, roughly 4% of them trucks, projected to reach 414 by 2043. The structure is 38 ft (11.6 m) long and 26 ft wide. If it were closed, the detour would be 57.2 mi (92 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 S 408 over Usrs Lat Ditch built?
It was built in 1953, making it 72 years old in 2025.
What condition is S 408 over Usrs Lat Ditch 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 October 2024.
How much traffic does S 408 over Usrs Lat Ditch carry?
About 394 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is S 408 over Usrs Lat Ditch?
The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.
Who owns S 408 over Usrs Lat Ditch?
It is owned by the State Highway Agency.