Old HWY 10 W over Clark Fork 054
PoorPosted for loadMineral County, Montana · 3M W Alberton · Structure no. L31170000+02001
- Built
- 1932
- 93 years old
- Condition
- Poor
- inspected June 2023
- Type
- Truss - Deck
- Steel
- Length
- 518 ft
- 3 main spans
- Daily traffic
- 356
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Old HWY 10 W over Clark Fork 054 is a steel truss - deck carrying Old HWY 10 W over Clark Fork 054 in Mineral County, Montana. It was built in 1932, so it is 93 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 356 vehicles a day, roughly 3% of them trucks, projected to reach 381 by 2043. The structure is 518 ft (157.9 m) long and 27 ft wide. If it were closed, the detour would be 6.8 mi (11 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old HWY 10 W over Clark Fork 054 built?
It was built in 1932, making it 93 years old in 2025.
What condition is Old HWY 10 W over Clark Fork 054 in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.
How much traffic does Old HWY 10 W over Clark Fork 054 carry?
About 356 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Old HWY 10 W over Clark Fork 054?
The structure is 518 ft (157.9 m) long with a longest span of 240 ft (73.1 m) and a deck 27 ft wide.
Who owns Old HWY 10 W over Clark Fork 054?
It is owned by the State Highway Agency.