US 93 over Salmon River;challis Br.
GoodCuster County, Idaho · 2.6 S. Challis · Structure no. 000000000018031
- Built
- 1995
- 30 years old
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 306 ft
- 2 main spans
- Daily traffic
- 1,400
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 93 over Salmon River;challis Br. is a steel continuous stringer/multi-beam or girder carrying US 93 over Salmon River;challis Br. in Custer County, Idaho. It was built in 1995, so it is 30 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 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 1,400 vehicles a day, roughly 20% of them trucks, projected to reach 2,100 by 2042. The structure is 306 ft (93.3 m) long and 42 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 93 over Salmon River;challis Br. built?
It was built in 1995, making it 30 years old in 2025.
What condition is US 93 over Salmon River;challis Br. 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 October 2024.
How much traffic does US 93 over Salmon River;challis Br. carry?
About 1,400 vehicles per day (2023 count), of which roughly 20% are trucks.
How long is US 93 over Salmon River;challis Br.?
The structure is 306 ft (93.3 m) long with a longest span of 150 ft (45.7 m) and a deck 42 ft wide.
Who owns US 93 over Salmon River;challis Br.?
It is owned by the State Highway Agency.