S 1 over Silver Bow Creek
FairDeer Lodge County, Montana · 6M SW Warm Springs · Structure no. P00019000+05892
- Built
- 1964
- 61 years old
- Condition
- Fair
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 71 ft
- 1 main span
- Daily traffic
- 4,640
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 1 over Silver Bow Creek is a prestressed concrete stringer/multi-beam or girder carrying S 1 over Silver Bow Creek in Deer Lodge County, Montana. It was built in 1964, so it is 61 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 4,640 vehicles a day, roughly 2% of them trucks, projected to reach 4,872 by 2043. The structure is 71 ft (21.6 m) long and 41 ft wide.
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 | 7 Good | Some minor problems. |
| 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 Silver Bow Creek built?
It was built in 1964, making it 61 years old in 2025.
What condition is S 1 over Silver Bow 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 December 2024.
How much traffic does S 1 over Silver Bow Creek carry?
About 4,640 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is S 1 over Silver Bow Creek?
The structure is 71 ft (21.6 m) long with a longest span of 70 ft (21.3 m) and a deck 41 ft wide.
Who owns S 1 over Silver Bow Creek?
It is owned by the State Highway Agency.