Imperial HWY-N405 over Imperial Highway
GoodLos Angeles County, California · 07-LA-405-R21.22-HAW · Structure no. 53 1241T
- Built
- 1994
- 31 years old
- Condition
- Good
- inspected November 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 158 ft
- 1 main span
- Daily traffic
- 2,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Imperial HWY-N405 over Imperial Highway is a prestressed concrete box beam or girders - multiple carrying Imperial HWY-N405 over Imperial Highway in Los Angeles County, California. It was built in 1994, so it is 31 years old, younger 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 2,000 vehicles a day, roughly 1% of them trucks, projected to reach 2,345 by 2041. The structure is 158 ft (48.2 m) long and 35 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Imperial HWY-N405 over Imperial Highway built?
It was built in 1994, making it 31 years old in 2025.
What condition is Imperial HWY-N405 over Imperial Highway 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 2024.
How much traffic does Imperial HWY-N405 over Imperial Highway carry?
About 2,000 vehicles per day (2019 count), of which roughly 1% are trucks.
How long is Imperial HWY-N405 over Imperial Highway?
The structure is 158 ft (48.2 m) long with a longest span of 102 ft (31.1 m) and a deck 35 ft wide.
Who owns Imperial HWY-N405 over Imperial Highway?
It is owned by the State Highway Agency.