US 12 over South Fork Smith River
FairMeagher County, Montana · 8M S White Sulphur Spr · Structure no. P00014033+05541
- Built
- 1997
- 28 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 73 ft
- 1 main span
- Daily traffic
- 1,023
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over South Fork Smith River is a steel stringer/multi-beam or girder carrying US 12 over South Fork Smith River in Meagher County, Montana. It was built in 1997, so it is 28 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 5 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 1,023 vehicles a day, roughly 11% of them trucks, projected to reach 1,074 by 2043. The structure is 73 ft (22.1 m) long and 53 ft wide. If it were closed, the detour would be 29.8 mi (48 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 12 over South Fork Smith River built?
It was built in 1997, making it 28 years old in 2025.
What condition is US 12 over South Fork Smith River 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 October 2023.
How much traffic does US 12 over South Fork Smith River carry?
About 1,023 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is US 12 over South Fork Smith River?
The structure is 73 ft (22.1 m) long with a longest span of 70 ft (21.3 m) and a deck 53 ft wide.
Who owns US 12 over South Fork Smith River?
It is owned by the State Highway Agency.