State Route 138 over California Aqueduct
GoodLos Angeles County, California · 07-LA-138-70.28 · Structure no. 53 2174
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected October 2024
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 68 ft
- 1 main span
- Daily traffic
- 9,300
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 138 over California Aqueduct is a concrete box beam or girders - multiple carrying State Route 138 over California Aqueduct in Los Angeles County, California. It was built in 1971, so it is 54 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 9,300 vehicles a day, roughly 6% of them trucks, projected to reach 18,600 by 2042. The structure is 68 ft (20.7 m) long and 43 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 State Route 138 over California Aqueduct built?
It was built in 1971, making it 54 years old in 2025.
What condition is State Route 138 over California 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 October 2024.
How much traffic does State Route 138 over California Aqueduct carry?
About 9,300 vehicles per day (2019 count), of which roughly 6% are trucks.
How long is State Route 138 over California Aqueduct?
The structure is 68 ft (20.7 m) long with a longest span of 66 ft (20.1 m) and a deck 43 ft wide.
Who owns State Route 138 over California Aqueduct?
It is owned by the State Highway Agency.