US 20 over Henrys Fk. Snake River
GoodFremont County, Idaho · 2 N. Ashton · Structure no. 000000000012671
- Built
- 2004
- 21 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 458 ft
- 3 main spans
- Daily traffic
- 5,300
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 over Henrys Fk. Snake River is a steel continuous stringer/multi-beam or girder carrying US 20 over Henrys Fk. Snake River in Fremont County, Idaho. It was built in 2004, so it is 21 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 5,300 vehicles a day, roughly 26% of them trucks, projected to reach 7,950 by 2042. The structure is 458 ft (139.6 m) long and 76 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 20 over Henrys Fk. Snake River built?
It was built in 2004, making it 21 years old in 2025.
What condition is US 20 over Henrys Fk. Snake 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 July 2024.
How much traffic does US 20 over Henrys Fk. Snake River carry?
About 5,300 vehicles per day (2023 count), of which roughly 26% are trucks.
How long is US 20 over Henrys Fk. Snake River?
The structure is 458 ft (139.6 m) long with a longest span of 212 ft (64.6 m) and a deck 76 ft wide.
Who owns US 20 over Henrys Fk. Snake River?
It is owned by the State Highway Agency.