Castaic RD over Unknown Chan
GoodLos Angeles County, California · 0.2 S/O Ridge Route RD · Structure no. 53C2282
- Built
- 1993
- 32 years old
- Condition
- Good
- inspected April 2024
- Type
- Culvert
- Concrete
- Length
- 26 ft
- 2 main spans
- Daily traffic
- 500
- 2017 count
- Owner
- County
- County Highway Agency
About this bridge
Castaic RD over Unknown Chan is a concrete culvert carrying Castaic RD over Unknown Chan in Los Angeles County, California. It was built in 1993, so it is 32 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 500 vehicles a day, roughly 1% of them trucks, projected to reach 700 by 2043. The structure is 26 ft (8 m) long and 41 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Castaic RD over Unknown Chan built?
It was built in 1993, making it 32 years old in 2025.
What condition is Castaic RD over Unknown Chan 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 April 2024.
How much traffic does Castaic RD over Unknown Chan carry?
About 500 vehicles per day (2017 count), of which roughly 1% are trucks.
How long is Castaic RD over Unknown Chan?
The structure is 26 ft (8 m) long with a longest span of 12 ft (3.6 m) and a deck 41 ft wide.
Who owns Castaic RD over Unknown Chan?
It is owned by the County Highway Agency.