Road over Knapp Creek
FairCuster County, Idaho · No Data Entered · Structure no. 040603000001173
- Built
- 1964
- 61 years old, rebuilt 2000
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 31 ft
- 1 main span
- Daily traffic
- 10
- Owner
- Federal
- U.S. Forest Service
About this bridge
Road over Knapp Creek is a wood or timber stringer/multi-beam or girder carrying Road over Knapp Creek in Custer County, Idaho. It was built in 1964 and reconstructed in 2000, so it is 61 years old, older than the Idaho average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 10 vehicles a day, projected to reach 15 by 2045. The structure is 31 ft (9.3 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Road over Knapp Creek built?
It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2000.
What condition is Road over Knapp Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.
How much traffic does Road over Knapp Creek carry?
About 10 vehicles per day (latest count).
How long is Road over Knapp Creek?
The structure is 31 ft (9.3 m) long with a longest span of 29 ft (8.8 m) and a deck 16 ft wide.
Who owns Road over Knapp Creek?
It is owned by the U.S. Forest Service.