Mason Ave over Los Angeles River
GoodLos Angeles County, California · 300 Ft N. Vanowen ST · Structure no. 53C1244
- Built
- 1958
- 67 years old, rebuilt 2006
- Condition
- Good
- inspected November 2021
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 200 ft
- 2 main spans
- Daily traffic
- 14,500
- 2016 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Mason Ave over Los Angeles River is a prestressed concrete stringer/multi-beam or girder carrying Mason Ave over Los Angeles River in Los Angeles County, California. It was built in 1958 and reconstructed in 2006, so it is 67 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 14,500 vehicles a day, roughly 1% of them trucks, projected to reach 28,620 by 2042. The structure is 200 ft (61 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 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 Mason Ave over Los Angeles River built?
It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2006.
What condition is Mason Ave over Los Angeles River 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 November 2021.
How much traffic does Mason Ave over Los Angeles River carry?
About 14,500 vehicles per day (2016 count), of which roughly 1% are trucks.
How long is Mason Ave over Los Angeles River?
The structure is 200 ft (61 m) long with a longest span of 99 ft (30.2 m) and a deck 84 ft wide.
Who owns Mason Ave over Los Angeles River?
It is owned by the City or Municipal Highway Agency.