Hiller Road over US Highway 101
GoodHumboldt County, California · 01-HUM-101-R91.99 · Structure no. 04 0173
- Built
- 1964
- 61 years old
- Condition
- Good
- inspected November 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 186 ft
- 4 main spans
- Daily traffic
- 2,500
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
Hiller Road over US Highway 101 is a concrete continuous tee beam carrying Hiller Road over US Highway 101 in Humboldt County, California. It was built in 1964, so it is 61 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 2,500 vehicles a day, roughly 10% of them trucks, projected to reach 2,180 by 2041. The structure is 186 ft (56.7 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 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 Hiller Road over US Highway 101 built?
It was built in 1964, making it 61 years old in 2025.
What condition is Hiller Road over US Highway 101 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 November 2023.
How much traffic does Hiller Road over US Highway 101 carry?
About 2,500 vehicles per day (2010 count), of which roughly 10% are trucks.
How long is Hiller Road over US Highway 101?
The structure is 186 ft (56.7 m) long with a longest span of 58 ft (17.8 m) and a deck 40 ft wide.
Who owns Hiller Road over US Highway 101?
It is owned by the State Highway Agency.