State Route 1 over San Gabriel River
GoodLos Angeles County, California · 07-LA-001-0.04-LBCH · Structure no. 53 0060
- Built
- 1931
- 94 years old, rebuilt 1962
- Condition
- Good
- inspected December 2023
- Type
- Tee Beam
- Concrete
- Length
- 399 ft
- 7 main spans
- Daily traffic
- 36,400
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 1 over San Gabriel River is a concrete tee beam carrying State Route 1 over San Gabriel River in Los Angeles County, California. It was built in 1931 and reconstructed in 1962, so it is 94 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 36,400 vehicles a day, roughly 2% of them trucks, projected to reach 65,418 by 2045. The structure is 399 ft (121.6 m) long and 72 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 |
|---|---|---|
| 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 1 over San Gabriel River built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1962.
What condition is State Route 1 over San Gabriel 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 December 2023.
How much traffic does State Route 1 over San Gabriel River carry?
About 36,400 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is State Route 1 over San Gabriel River?
The structure is 399 ft (121.6 m) long with a longest span of 57 ft (17.4 m) and a deck 72 ft wide.
Who owns State Route 1 over San Gabriel River?
It is owned by the State Highway Agency.