State Route 1 over Topanga Creek
GoodLos Angeles County, California · 07-LA-001-40.99-MAL · Structure no. 53 0035
- Built
- 1933
- 92 years old
- Condition
- Good
- inspected August 2023
- Type
- Slab
- Concrete Continuous
- Length
- 79 ft
- 2 main spans
- Daily traffic
- 43,250
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 1 over Topanga Creek is a concrete continuous slab carrying State Route 1 over Topanga Creek in Los Angeles County, California. It was built in 1933, so it is 92 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 43,250 vehicles a day, roughly 2% of them trucks, projected to reach 47,412 by 2040. The structure is 79 ft (24.1 m) long and 88 ft wide. If it were closed, the detour would be 21.7 mi (35 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 1 over Topanga Creek built?
It was built in 1933, making it 92 years old in 2025.
What condition is State Route 1 over Topanga Creek 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 August 2023.
How much traffic does State Route 1 over Topanga Creek carry?
About 43,250 vehicles per day (2017 count), of which roughly 2% are trucks.
How long is State Route 1 over Topanga Creek?
The structure is 79 ft (24.1 m) long with a longest span of 38 ft (11.6 m) and a deck 88 ft wide.
Who owns State Route 1 over Topanga Creek?
It is owned by the State Highway Agency.