S405-E90 Conn Oc over I405 Jefferson Ramps
FairLos Angeles County, California · 07-LA-405-25.91-LA · Structure no. 53 1852F
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected February 2025
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 830 ft
- 2 main spans
- Daily traffic
- 9,200
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
S405-E90 Conn Oc over I405 Jefferson Ramps is a prestressed concrete continuous stringer/multi-beam or girder carrying S405-E90 Conn Oc over I405 Jefferson Ramps in Los Angeles County, California. It was built in 1967, so it is 58 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 9,200 vehicles a day, roughly 2% of them trucks, projected to reach 26,508 by 2045. The structure is 830 ft (253 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S405-E90 Conn Oc over I405 Jefferson Ramps built?
It was built in 1967, making it 58 years old in 2025.
What condition is S405-E90 Conn Oc over I405 Jefferson Ramps 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 February 2025.
How much traffic does S405-E90 Conn Oc over I405 Jefferson Ramps carry?
About 9,200 vehicles per day (2019 count), of which roughly 2% are trucks.
How long is S405-E90 Conn Oc over I405 Jefferson Ramps?
The structure is 830 ft (253 m) long with a longest span of 100 ft (30.5 m) and a deck 34 ft wide.
Who owns S405-E90 Conn Oc over I405 Jefferson Ramps?
It is owned by the State Highway Agency.