US 93 over Salmon River;salmon Br.
PoorLemhi County, Idaho · At Salmon · Structure no. 000000000017885
- Built
- 1926
- 99 years old, rebuilt 1964
- Condition
- Poor
- inspected October 2024
- Type
- Arch - Deck
- Concrete
- Length
- 438 ft
- 6 main spans
- Daily traffic
- 7,300
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 93 over Salmon River;salmon Br. is a concrete arch - deck carrying US 93 over Salmon River;salmon Br. in Lemhi County, Idaho. It was built in 1926 and reconstructed in 1964, so it is 99 years old, older than the Idaho average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 7,300 vehicles a day, roughly 4% of them trucks, projected to reach 10,950 by 2042. The structure is 438 ft (133.5 m) long and 45 ft wide. If it were closed, the detour would be 98.8 mi (159 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Salmon River;salmon Br. built?
It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1964.
What condition is US 93 over Salmon River;salmon Br. in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.
How much traffic does US 93 over Salmon River;salmon Br. carry?
About 7,300 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is US 93 over Salmon River;salmon Br.?
The structure is 438 ft (133.5 m) long with a longest span of 78 ft (23.8 m) and a deck 45 ft wide.
Who owns US 93 over Salmon River;salmon Br.?
It is owned by the State Highway Agency.