Koocanusa W. Side over Big Creek
GoodLincoln County, Montana · Big Creek · Structure no. 011401000001084
- Built
- 1970
- 55 years old
- Condition
- Good
- inspected August 2021
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 221 ft
- 3 main spans
- Daily traffic
- 40
- Owner
- Federal
- U.S. Forest Service
About this bridge
Koocanusa W. Side over Big Creek is a prestressed concrete stringer/multi-beam or girder carrying Koocanusa W. Side over Big Creek in Lincoln County, Montana. It was built in 1970, so it is 55 years old, older 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 40 vehicles a day, projected to reach 60 by 2045. The structure is 221 ft (67.4 m) long and 31 ft wide. If it were closed, the detour would be 74.6 mi (120 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 | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Koocanusa W. Side over Big Creek built?
It was built in 1970, making it 55 years old in 2025.
What condition is Koocanusa W. Side over Big Creek 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 August 2021.
How much traffic does Koocanusa W. Side over Big Creek carry?
About 40 vehicles per day (latest count).
How long is Koocanusa W. Side over Big Creek?
The structure is 221 ft (67.4 m) long with a longest span of 76 ft (23.2 m) and a deck 31 ft wide.
Who owns Koocanusa W. Side over Big Creek?
It is owned by the U.S. Forest Service.