US Highway 101 SB over Eel River
GoodHumboldt County, California · 01-HUM-101-M53.97-RDEL · Structure no. 04 0016L
- Built
- 1974
- 51 years old
- Condition
- Good
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 1,730 ft
- 7 main spans
- Daily traffic
- 4,400
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 SB over Eel River is a prestressed concrete continuous box beam or girders - multiple carrying US Highway 101 SB over Eel River in Humboldt County, California. It was built in 1974, so it is 51 years old, younger 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 4,400 vehicles a day, roughly 11% of them trucks, projected to reach 6,583 by 2045. The structure is 1,730 ft (527.4 m) long and 41 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 | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 SB over Eel River built?
It was built in 1974, making it 51 years old in 2025.
What condition is US Highway 101 SB over Eel 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 2023.
How much traffic does US Highway 101 SB over Eel River carry?
About 4,400 vehicles per day (2009 count), of which roughly 11% are trucks.
How long is US Highway 101 SB over Eel River?
The structure is 1,730 ft (527.4 m) long with a longest span of 300 ft (91.4 m) and a deck 41 ft wide.
Who owns US Highway 101 SB over Eel River?
It is owned by the State Highway Agency.