State Route 1 over Alamitos Bay
GoodLos Angeles County, California · 07-LA-001-0.98-LBCH · Structure no. 53 0064
- Built
- 1959
- 66 years old, rebuilt 1967
- Condition
- Good
- inspected December 2023
- Type
- Slab
- Concrete Continuous
- Length
- 405 ft
- 19 main spans
- Daily traffic
- 38,000
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 1 over Alamitos Bay is a concrete continuous slab carrying State Route 1 over Alamitos Bay in Los Angeles County, California. It was built in 1959 and reconstructed in 1967, so it is 66 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 38,000 vehicles a day, roughly 2% of them trucks, projected to reach 65,418 by 2040. The structure is 405 ft (123.4 m) long and 92 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 Alamitos Bay built?
It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1967.
What condition is State Route 1 over Alamitos Bay 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 Alamitos Bay carry?
About 38,000 vehicles per day (2021 count), of which roughly 2% are trucks.
How long is State Route 1 over Alamitos Bay?
The structure is 405 ft (123.4 m) long with a longest span of 42 ft (12.8 m) and a deck 92 ft wide.
Who owns State Route 1 over Alamitos Bay?
It is owned by the State Highway Agency.