US Highway 101 NB over Eureka Slough
GoodHumboldt County, California · 01-HUM-101-79.78-EUR · Structure no. 04 0022R
- Built
- 1956
- 69 years old
- Condition
- Good
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 947 ft
- 1 main span
- Daily traffic
- 17,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over Eureka Slough is a prestressed concrete stringer/multi-beam or girder carrying US Highway 101 NB over Eureka Slough in Humboldt County, California. It was built in 1956, so it is 69 years old, older than the California average of 54.8 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 17,000 vehicles a day, roughly 7% of them trucks, projected to reach 24,154 by 2045. The structure is 947 ft (288.6 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| 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 Highway 101 NB over Eureka Slough built?
It was built in 1956, making it 69 years old in 2025.
What condition is US Highway 101 NB over Eureka Slough 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 January 2025.
How much traffic does US Highway 101 NB over Eureka Slough carry?
About 17,000 vehicles per day (2009 count), of which roughly 7% are trucks.
How long is US Highway 101 NB over Eureka Slough?
The structure is 947 ft (288.6 m) long with a longest span of 105 ft (32 m) and a deck 37 ft wide.
Who owns US Highway 101 NB over Eureka Slough?
It is owned by the State Highway Agency.