US 191 FH 42 over Grayling Creek
FairGallatin County, Montana · 10M N West Yellowstone · Structure no. P00050010+00251
- Built
- 2012
- 13 years old
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 122 ft
- 1 main span
- Daily traffic
- 2,605
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 191 FH 42 over Grayling Creek is a prestressed concrete stringer/multi-beam or girder carrying US 191 FH 42 over Grayling Creek in Gallatin County, Montana. It was built in 2012, so it is 13 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 2,605 vehicles a day, roughly 10% of them trucks, projected to reach 2,735 by 2043. The structure is 122 ft (37.1 m) long and 43 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 | 8 Very Good | No problems noted. |
| 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 US 191 FH 42 over Grayling Creek built?
It was built in 2012, making it 13 years old in 2025.
What condition is US 191 FH 42 over Grayling 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 June 2024.
How much traffic does US 191 FH 42 over Grayling Creek carry?
About 2,605 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is US 191 FH 42 over Grayling Creek?
The structure is 122 ft (37.1 m) long with a longest span of 120 ft (36.6 m) and a deck 43 ft wide.
Who owns US 191 FH 42 over Grayling Creek?
It is owned by the State Highway Agency.