U.S. Highway 101 over Hillside
GoodHumboldt County, California · 01-HUM-101-27.07 · Structure no. 04 0072
- Built
- 1963
- 62 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 1,307 ft
- 11 main spans
- Daily traffic
- 5,450
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Hillside is a steel stringer/multi-beam or girder carrying U.S. Highway 101 over Hillside in Humboldt County, California. It was built in 1963, so it is 62 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 5,450 vehicles a day, roughly 17% of them trucks, projected to reach 8,364 by 2041. The structure is 1,307 ft (398.5 m) long and 62 ft wide. If it were closed, the detour would be 32.9 mi (53 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was U.S. Highway 101 over Hillside built?
It was built in 1963, making it 62 years old in 2025.
What condition is U.S. Highway 101 over Hillside 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 2023.
How much traffic does U.S. Highway 101 over Hillside carry?
About 5,450 vehicles per day (2010 count), of which roughly 17% are trucks.
How long is U.S. Highway 101 over Hillside?
The structure is 1,307 ft (398.5 m) long with a longest span of 110 ft (33.5 m) and a deck 62 ft wide.
Who owns U.S. Highway 101 over Hillside?
It is owned by the State Highway Agency.