Sierra HWY over Los Angeles Aqueduct
GoodLos Angeles County, California · 07-LA-014U-T27.37 · Structure no. 53 0363M
- Built
- 1938
- 87 years old
- Condition
- Good
- inspected February 2025
- Type
- Culvert
- Concrete
- Length
- 47 ft
- 1 main span
- Daily traffic
- 5,500
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
Sierra HWY over Los Angeles Aqueduct is a concrete culvert carrying Sierra HWY over Los Angeles Aqueduct in Los Angeles County, California. It was built in 1938, so it is 87 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 5,500 vehicles a day, roughly 2% of them trucks, projected to reach 6,907 by 2043. The structure is 47 ft (14.3 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 9 Excellent | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sierra HWY over Los Angeles Aqueduct built?
It was built in 1938, making it 87 years old in 2025.
What condition is Sierra HWY over Los Angeles Aqueduct 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 February 2025.
How much traffic does Sierra HWY over Los Angeles Aqueduct carry?
About 5,500 vehicles per day (2021 count), of which roughly 2% are trucks.
How long is Sierra HWY over Los Angeles Aqueduct?
The structure is 47 ft (14.3 m) long with a longest span of 42 ft (12.8 m) and a deck 35 ft wide.
Who owns Sierra HWY over Los Angeles Aqueduct?
It is owned by the State Highway Agency.