US Bridges

California Ave over I 405 & Ramps

Good

Los Angeles County, California · 07-LA-405-5.64-SIGH · Structure no. 53 1203

Built
1964
61 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
313 ft
4 main spans
Daily traffic
3,100
2020 count
Owner
State
State Highway Agency

About this bridge

California Ave over I 405 & Ramps is a concrete continuous box beam or girders - multiple carrying California Ave over I 405 & Ramps in Los Angeles County, California. It was built in 1964, so it is 61 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 3,100 vehicles a day, roughly 1% of them trucks, projected to reach 3,902 by 2042. The structure is 313 ft (95.4 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCalifornia Ave
CrossesI 405 & Ramps
Location07-LA-405-5.64-SIGH
RouteCity Street 0
Coordinates33.81391, -118.18056
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating36.4 US tons
Inventory rating28.2 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length313 ft (95.4 m)
Longest span90 ft (27.4 m)
Deck width70 ft (21.4 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2020)
Projected traffic3,902 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was California Ave over I 405 & Ramps built?

It was built in 1964, making it 61 years old in 2025.

What condition is California Ave over I 405 & Ramps 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 January 2025.

How much traffic does California Ave over I 405 & Ramps carry?

About 3,100 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is California Ave over I 405 & Ramps?

The structure is 313 ft (95.4 m) long with a longest span of 90 ft (27.4 m) and a deck 70 ft wide.

Who owns California Ave over I 405 & Ramps?

It is owned by the State Highway Agency.