US Bridges

S405-N710 Conn over I 405 & Connectors

Good

Los Angeles County, California · 07-LA-405-7.79-LBCH · Structure no. 53 2780F

Built
1997
28 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
588 ft
4 main spans
Daily traffic
10,100
2020 count
Owner
State
State Highway Agency

About this bridge

S405-N710 Conn over I 405 & Connectors is a prestressed concrete continuous box beam or girders - multiple carrying S405-N710 Conn over I 405 & Connectors in Los Angeles County, California. It was built in 1997, so it is 28 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 10,100 vehicles a day, roughly 2% of them trucks, projected to reach 11,484 by 2046. The structure is 588 ft (179.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesS405-N710 Conn
CrossesI 405 & Connectors
Location07-LA-405-7.79-LBCH
RouteInterstate 405
Coordinates33.82583, -118.2111
Functional classUrban Principal Arterial - Interstate

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.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length588 ft (179.2 m)
Longest span184 ft (56.1 m)
Deck width43 ft (13 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,100 (2020)
Projected traffic11,484 by 2046
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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-N710 Conn over I 405 & Connectors built?

It was built in 1997, making it 28 years old in 2025.

What condition is S405-N710 Conn over I 405 & Connectors 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 July 2024.

How much traffic does S405-N710 Conn over I 405 & Connectors carry?

About 10,100 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is S405-N710 Conn over I 405 & Connectors?

The structure is 588 ft (179.2 m) long with a longest span of 184 ft (56.1 m) and a deck 43 ft wide.

Who owns S405-N710 Conn over I 405 & Connectors?

It is owned by the State Highway Agency.