Willoughby LN over Supply Ditch 085
GoodRavalli County, Montana · 4M S Stevensville · Structure no. L41311001+02001
- Built
- 2014
- 11 years old
- Condition
- Good
- inspected December 2024
- Type
- Channel Beam
- Prestressed Concrete
- Length
- 47 ft
- 1 main span
- Daily traffic
- 641
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Willoughby LN over Supply Ditch 085 is a prestressed concrete channel beam carrying Willoughby LN over Supply Ditch 085 in Ravalli County, Montana. It was built in 2014, so it is 11 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 641 vehicles a day, roughly 3% of them trucks, projected to reach 686 by 2043. The structure is 47 ft (14.3 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 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 Willoughby LN over Supply Ditch 085 built?
It was built in 2014, making it 11 years old in 2025.
What condition is Willoughby LN over Supply Ditch 085 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 December 2024.
How much traffic does Willoughby LN over Supply Ditch 085 carry?
About 641 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Willoughby LN over Supply Ditch 085?
The structure is 47 ft (14.3 m) long with a longest span of 47 ft (14.3 m) and a deck 31 ft wide.
Who owns Willoughby LN over Supply Ditch 085?
It is owned by the County Highway Agency.