S 431 over Muddy Creek
GoodTeton County, Montana · 2M W Power · Structure no. S00431017+02401
- Built
- 1970
- 55 years old
- Condition
- Good
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 93 ft
- 2 main spans
- Daily traffic
- 493
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 431 over Muddy Creek is a prestressed concrete stringer/multi-beam or girder carrying S 431 over Muddy Creek in Teton County, Montana. It was built in 1970, so it is 55 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 493 vehicles a day, roughly 3% of them trucks, projected to reach 518 by 2043. The structure is 93 ft (28.3 m) long and 34 ft wide. If it were closed, the detour would be 65.2 mi (105 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 S 431 over Muddy Creek built?
It was built in 1970, making it 55 years old in 2025.
What condition is S 431 over Muddy Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.
How much traffic does S 431 over Muddy Creek carry?
About 493 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is S 431 over Muddy Creek?
The structure is 93 ft (28.3 m) long with a longest span of 46 ft (14 m) and a deck 34 ft wide.
Who owns S 431 over Muddy Creek?
It is owned by the State Highway Agency.