S 1 over Willow Creek
GoodGranite County, Montana · 4M S Drummond · Structure no. P00019059+07341
- Built
- 1999
- 26 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 67 ft
- 1 main span
- Daily traffic
- 1,325
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 1 over Willow Creek is a prestressed concrete stringer/multi-beam or girder carrying S 1 over Willow Creek in Granite County, Montana. It was built in 1999, so it is 26 years old, younger 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 1,325 vehicles a day, roughly 3% of them trucks, projected to reach 1,424 by 2043. The structure is 67 ft (20.3 m) long and 38 ft wide. If it were closed, the detour would be 29.8 mi (48 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 | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 1 over Willow Creek built?
It was built in 1999, making it 26 years old in 2025.
What condition is S 1 over Willow 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 July 2024.
How much traffic does S 1 over Willow Creek carry?
About 1,325 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is S 1 over Willow Creek?
The structure is 67 ft (20.3 m) long with a longest span of 62 ft (18.9 m) and a deck 38 ft wide.
Who owns S 1 over Willow Creek?
It is owned by the State Highway Agency.