S 43 over Deep Creek
FairDeer Lodge County, Montana · 10M NW Wise River · Structure no. P00046054+03551
- Built
- 2006
- 19 years old
- Condition
- Fair
- inspected February 2025
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 90 ft
- 1 main span
- Daily traffic
- 485
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 43 over Deep Creek is a prestressed concrete stringer/multi-beam or girder carrying S 43 over Deep Creek in Deer Lodge County, Montana. It was built in 2006, so it is 19 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 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 485 vehicles a day, roughly 7% of them trucks, projected to reach 509 by 2043. The structure is 90 ft (27.3 m) long and 50 ft wide. If it were closed, the detour would be 80.2 mi (129 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 Deep Creek built?
It was built in 2006, making it 19 years old in 2025.
What condition is S 43 over Deep 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 2025.
How much traffic does S 43 over Deep Creek carry?
About 485 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is S 43 over Deep Creek?
The structure is 90 ft (27.3 m) long with a longest span of 89 ft (27 m) and a deck 50 ft wide.
Who owns S 43 over Deep Creek?
It is owned by the State Highway Agency.