Jackson Ranch RD over Liscomb Slough
GoodHumboldt County, California · 0.25 MI S Foster Ave · Structure no. 04C0185
- Built
- 1960
- 65 years old
- Condition
- Good
- inspected June 2021
- Type
- Slab
- Concrete Continuous
- Length
- 73 ft
- 3 main spans
- Daily traffic
- 327
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
Jackson Ranch RD over Liscomb Slough is a concrete continuous slab carrying Jackson Ranch RD over Liscomb Slough in Humboldt County, California. It was built in 1960, so it is 65 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 327 vehicles a day, roughly 5% of them trucks, projected to reach 515 by 2043. The structure is 73 ft (22.3 m) long and 22 ft wide. If it were closed, the detour would be 6.2 mi (10 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 Jackson Ranch RD over Liscomb Slough built?
It was built in 1960, making it 65 years old in 2025.
What condition is Jackson Ranch RD over Liscomb 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 June 2021.
How much traffic does Jackson Ranch RD over Liscomb Slough carry?
About 327 vehicles per day (2011 count), of which roughly 5% are trucks.
How long is Jackson Ranch RD over Liscomb Slough?
The structure is 73 ft (22.3 m) long with a longest span of 28 ft (8.5 m) and a deck 22 ft wide.
Who owns Jackson Ranch RD over Liscomb Slough?
It is owned by the County Highway Agency.