S 78 over Shane Creek
FairStillwater County, Montana · 3M S Columbus · Structure no. P00078043+05911
- Built
- 2007
- 18 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 131 ft
- 1 main span
- Daily traffic
- 3,144
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 78 over Shane Creek is a prestressed concrete stringer/multi-beam or girder carrying S 78 over Shane Creek in Stillwater County, Montana. It was built in 2007, so it is 18 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 3,144 vehicles a day, roughly 4% of them trucks, projected to reach 3,364 by 2043. The structure is 131 ft (39.8 m) long and 42 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 78 over Shane Creek built?
It was built in 2007, making it 18 years old in 2025.
What condition is S 78 over Shane 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 September 2023.
How much traffic does S 78 over Shane Creek carry?
About 3,144 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is S 78 over Shane Creek?
The structure is 131 ft (39.8 m) long with a longest span of 128 ft (39 m) and a deck 42 ft wide.
Who owns S 78 over Shane Creek?
It is owned by the State Highway Agency.