SH 28 over Lemhi River
GoodLemhi County, Idaho · 13 S. Salmon · Structure no. 000000000013426
- Built
- 2001
- 24 years old
- Condition
- Good
- inspected August 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 78 ft
- 1 main span
- Daily traffic
- 1,600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SH 28 over Lemhi River is a prestressed concrete box beam or girders - multiple carrying SH 28 over Lemhi River in Lemhi County, Idaho. It was built in 2001, so it is 24 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 1,600 vehicles a day, roughly 8% of them trucks, projected to reach 2,400 by 2042. The structure is 78 ft (23.8 m) long and 44 ft wide. If it were closed, the detour would be 78.3 mi (126 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 | 7 Good | Some minor problems. |
| 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 SH 28 over Lemhi River built?
It was built in 2001, making it 24 years old in 2025.
What condition is SH 28 over Lemhi 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 August 2024.
How much traffic does SH 28 over Lemhi River carry?
About 1,600 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is SH 28 over Lemhi River?
The structure is 78 ft (23.8 m) long with a longest span of 77 ft (23.5 m) and a deck 44 ft wide.
Who owns SH 28 over Lemhi River?
It is owned by the State Highway Agency.