N405 - N710 Conn over Los Angeles River
FairLos Angeles County, California · 07-LA-405-7.40-LBCH · Structure no. 53 1209G
- Built
- 1963
- 62 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 811 ft
- 8 main spans
- Daily traffic
- 24,488
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
N405 - N710 Conn over Los Angeles River is a steel stringer/multi-beam or girder carrying N405 - N710 Conn over Los Angeles River in Los Angeles County, California. It was built in 1963, so it is 62 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 24,488 vehicles a day, roughly 2% of them trucks, projected to reach 27,989 by 2046. The structure is 811 ft (247.2 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 N405 - N710 Conn over Los Angeles River built?
It was built in 1963, making it 62 years old in 2025.
What condition is N405 - N710 Conn over Los Angeles River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.
How much traffic does N405 - N710 Conn over Los Angeles River carry?
About 24,488 vehicles per day (2024 count), of which roughly 2% are trucks.
How long is N405 - N710 Conn over Los Angeles River?
The structure is 811 ft (247.2 m) long with a longest span of 200 ft (61 m) and a deck 34 ft wide.
Who owns N405 - N710 Conn over Los Angeles River?
It is owned by the State Highway Agency.