US 20B over Henrys Fk Snake River
FairFremont County, Idaho · 1.5 N. ST Anthony · Structure no. 000000000012741
- Built
- 2014
- 11 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 275 ft
- 3 main spans
- Daily traffic
- 1,400
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 20B over Henrys Fk Snake River is a concrete stringer/multi-beam or girder carrying US 20B over Henrys Fk Snake River in Fremont County, Idaho. It was built in 2014, so it is 11 years old, younger 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 1,400 vehicles a day, roughly 9% of them trucks, projected to reach 2,100 by 2042. The structure is 275 ft (83.8 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 20B over Henrys Fk Snake River built?
It was built in 2014, making it 11 years old in 2025.
What condition is US 20B over Henrys Fk Snake 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 September 2024.
How much traffic does US 20B over Henrys Fk Snake River carry?
About 1,400 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is US 20B over Henrys Fk Snake River?
The structure is 275 ft (83.8 m) long with a longest span of 150 ft (45.7 m) and a deck 42 ft wide.
Who owns US 20B over Henrys Fk Snake River?
It is owned by the State Highway Agency.