S 43 over Wise River
FairBeaverhead County, Montana · Wise River · Structure no. P00046065+01201
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 77 ft
- 1 main span
- Daily traffic
- 616
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 43 over Wise River is a prestressed concrete stringer/multi-beam or girder carrying S 43 over Wise River in Beaverhead 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 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 616 vehicles a day, roughly 5% of them trucks, projected to reach 647 by 2043. The structure is 77 ft (23.5 m) long and 46 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 43 over Wise River built?
It was built in 1970, making it 55 years old in 2025.
What condition is S 43 over Wise River 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 April 2023.
How much traffic does S 43 over Wise River carry?
About 616 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is S 43 over Wise River?
The structure is 77 ft (23.5 m) long with a longest span of 74 ft (22.6 m) and a deck 46 ft wide.
Who owns S 43 over Wise River?
It is owned by the State Highway Agency.