US 93 over Big Lost River
FairButte County, Idaho · 1 W. Arco · Structure no. 000000000013195
- Built
- 1958
- 67 years old
- Condition
- Fair
- inspected July 2023
- Type
- Tee Beam
- Concrete
- Length
- 53 ft
- 1 main span
- Daily traffic
- 2,300
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 93 over Big Lost River is a concrete tee beam carrying US 93 over Big Lost River in Butte County, Idaho. It was built in 1958, so it is 67 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 6 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 2,300 vehicles a day, roughly 18% of them trucks, projected to reach 3,450 by 2042. The structure is 53 ft (16.2 m) long and 36 ft wide.
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 | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 93 over Big Lost River built?
It was built in 1958, making it 67 years old in 2025.
What condition is US 93 over Big Lost River 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 July 2023.
How much traffic does US 93 over Big Lost River carry?
About 2,300 vehicles per day (2023 count), of which roughly 18% are trucks.
How long is US 93 over Big Lost River?
The structure is 53 ft (16.2 m) long with a longest span of 51 ft (15.5 m) and a deck 36 ft wide.
Who owns US 93 over Big Lost River?
It is owned by the State Highway Agency.