Knighton LN;3350 N over Big Lost River
GoodButte County, Idaho · 2.3 N 0.5 E Moore · Structure no. 000000000031486
- Built
- 2010
- 15 years old
- Condition
- Good
- inspected July 2021
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 127 ft
- 1 main span
- Daily traffic
- 80
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Knighton LN;3350 N over Big Lost River is a prestressed concrete stringer/multi-beam or girder carrying Knighton LN;3350 N over Big Lost River in Butte County, Idaho. It was built in 2010, so it is 15 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 80 vehicles a day, roughly 14% of them trucks, projected to reach 120 by 2042. The structure is 127 ft (38.7 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Knighton LN;3350 N over Big Lost River built?
It was built in 2010, making it 15 years old in 2025.
What condition is Knighton LN;3350 N over Big Lost 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 July 2021.
How much traffic does Knighton LN;3350 N over Big Lost River carry?
About 80 vehicles per day (2023 count), of which roughly 14% are trucks.
How long is Knighton LN;3350 N over Big Lost River?
The structure is 127 ft (38.7 m) long with a longest span of 120 ft (36.6 m) and a deck 31 ft wide.
Who owns Knighton LN;3350 N over Big Lost River?
It is owned by the County Highway Agency.