Sierra HWY over Unnamed Wash
GoodLos Angeles County, California · Mm 4.00 · Structure no. 53C0386
- Built
- 1921
- 104 years old, rebuilt 1931
- Condition
- Good
- inspected April 2024
- Type
- Culvert
- Concrete
- Length
- 61 ft
- 4 main spans
- Daily traffic
- 4,141
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
Sierra HWY over Unnamed Wash is a concrete culvert carrying Sierra HWY over Unnamed Wash in Los Angeles County, California. It was built in 1921 and reconstructed in 1931, so it is 104 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 4,141 vehicles a day, roughly 2% of them trucks, projected to reach 4,555 by 2044. The structure is 61 ft (18.7 m) long and 63 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sierra HWY over Unnamed Wash built?
It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1931.
What condition is Sierra HWY over Unnamed Wash 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 Sierra HWY over Unnamed Wash carry?
About 4,141 vehicles per day (2018 count), of which roughly 2% are trucks.
How long is Sierra HWY over Unnamed Wash?
The structure is 61 ft (18.7 m) long with a longest span of 12 ft (3.7 m) and a deck 63 ft wide.
Who owns Sierra HWY over Unnamed Wash?
It is owned by the County Highway Agency.