Cecilville Road over Knownothing Creek
GoodSiskiyou County, California · 2 MI S/O Salmon River RD · Structure no. 02C0088
- Built
- 1987
- 38 years old
- Condition
- Good
- inspected August 2021
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 77 ft
- 1 main span
- Daily traffic
- 120
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
Cecilville Road over Knownothing Creek is a concrete box beam or girders - multiple carrying Cecilville Road over Knownothing Creek in Siskiyou County, California. It was built in 1987, so it is 38 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 120 vehicles a day, roughly 2% of them trucks, projected to reach 150 by 2043. The structure is 77 ft (23.5 m) long and 25 ft wide. If it were closed, the detour would be 98.2 mi (158 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Cecilville Road over Knownothing Creek built?
It was built in 1987, making it 38 years old in 2025.
What condition is Cecilville Road over Knownothing Creek 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 2021.
How much traffic does Cecilville Road over Knownothing Creek carry?
About 120 vehicles per day (2024 count), of which roughly 2% are trucks.
How long is Cecilville Road over Knownothing Creek?
The structure is 77 ft (23.5 m) long with a longest span of 75 ft (22.9 m) and a deck 25 ft wide.
Who owns Cecilville Road over Knownothing Creek?
It is owned by the County Highway Agency.