Trapper Ck. Road over North Fork Boise River
GoodBoise County, Idaho · 2.5 MI SW of Deer Park · Structure no. 040203000001057
- Built
- 1977
- 48 years old
- Condition
- Good
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 85 ft
- 1 main span
- Daily traffic
- 10
- 1990 count
- Owner
- Federal
- U.S. Forest Service
About this bridge
Trapper Ck. Road over North Fork Boise River is a prestressed concrete stringer/multi-beam or girder carrying Trapper Ck. Road over North Fork Boise River in Boise County, Idaho. It was built in 1977, so it is 48 years old, older than the Idaho average of 45.3 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 10 vehicles a day, projected to reach 15 by 2045. The structure is 85 ft (25.9 m) long and 18 ft wide. If it were closed, the detour would be 31.7 mi (51 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Trapper Ck. Road over North Fork Boise River built?
It was built in 1977, making it 48 years old in 2025.
What condition is Trapper Ck. Road over North Fork Boise River 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 September 2023.
How much traffic does Trapper Ck. Road over North Fork Boise River carry?
About 10 vehicles per day (1990 count).
How long is Trapper Ck. Road over North Fork Boise River?
The structure is 85 ft (25.9 m) long with a longest span of 82 ft (25.1 m) and a deck 18 ft wide.
Who owns Trapper Ck. Road over North Fork Boise River?
It is owned by the U.S. Forest Service.