Bear River Road over Bonanza Gulch
GoodHumboldt County, California · 8.5 MI S of Mattole RD · Structure no. 04C0163
- Built
- 1986
- 39 years old
- Condition
- Good
- inspected March 2022
- Type
- Slab
- Concrete
- Length
- 42 ft
- 1 main span
- Daily traffic
- 15
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
Bear River Road over Bonanza Gulch is a concrete slab carrying Bear River Road over Bonanza Gulch in Humboldt County, California. It was built in 1986, so it is 39 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 15 vehicles a day, projected to reach 27 by 2044. The structure is 42 ft (12.8 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 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 Bear River Road over Bonanza Gulch built?
It was built in 1986, making it 39 years old in 2025.
What condition is Bear River Road over Bonanza Gulch 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 March 2022.
How much traffic does Bear River Road over Bonanza Gulch carry?
About 15 vehicles per day (2011 count).
How long is Bear River Road over Bonanza Gulch?
The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 25 ft wide.
Who owns Bear River Road over Bonanza Gulch?
It is owned by the County Highway Agency.