US Bridges

S405-W90 Connector over Slauson Ave

Fair

Los Angeles County, California · 07-LA-405-26.10-CLC · Structure no. 53 1974F

Built
1968
57 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
169 ft
2 main spans
Daily traffic
6,200
2020 count
Owner
State
State Highway Agency

About this bridge

S405-W90 Connector over Slauson Ave is a concrete continuous box beam or girders - single or spread carrying S405-W90 Connector over Slauson Ave in Los Angeles County, California. It was built in 1968, so it is 57 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 6,200 vehicles a day, roughly 2% of them trucks, projected to reach 9,207 by 2045. The structure is 169 ft (51.5 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesS405-W90 Connector
CrossesSlauson Ave
Location07-LA-405-26.10-CLC
RouteInterstate 405
CountyLos Angeles County
StateCalifornia
Coordinates33.98964, -118.40161
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating59.6 US tons
Inventory rating46.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length169 ft (51.5 m)
Longest span93 ft (28.3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,200 (2020)
Projected traffic9,207 by 2045
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 S405-W90 Connector over Slauson Ave built?

It was built in 1968, making it 57 years old in 2025.

What condition is S405-W90 Connector over Slauson Ave 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-W90 Connector over Slauson Ave carry?

About 6,200 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is S405-W90 Connector over Slauson Ave?

The structure is 169 ft (51.5 m) long with a longest span of 93 ft (28.3 m) and a deck 26 ft wide.

Who owns S405-W90 Connector over Slauson Ave?

It is owned by the State Highway Agency.