HWY 10 W over Ninemile Slide 026
PoorPosted for loadMissoula County, Montana · 3M W Huson · Structure no. L32166005+02001
- Built
- 1947
- 78 years old
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 375 ft
- 15 main spans
- Daily traffic
- 141
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
HWY 10 W over Ninemile Slide 026 is a wood or timber stringer/multi-beam or girder carrying HWY 10 W over Ninemile Slide 026 in Missoula County, Montana. It was built in 1947, so it is 78 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 141 vehicles a day, roughly 3% of them trucks, projected to reach 150 by 2043. The structure is 375 ft (114.3 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY 10 W over Ninemile Slide 026 built?
It was built in 1947, making it 78 years old in 2025.
What condition is HWY 10 W over Ninemile Slide 026 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 August 2024.
How much traffic does HWY 10 W over Ninemile Slide 026 carry?
About 141 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is HWY 10 W over Ninemile Slide 026?
The structure is 375 ft (114.3 m) long with a longest span of 27 ft (8.2 m) and a deck 29 ft wide.
Who owns HWY 10 W over Ninemile Slide 026?
It is owned by the State Highway Agency.