US Bridges

S405-N710/710 Sep over Route 710 & Connectors

Fair

Los Angeles County, California · 07-LA-405-7.66-LBCH · Structure no. 53 1422F

Built
1961
64 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
605 ft
6 main spans
Daily traffic
25,000
2019 count
Owner
State
State Highway Agency

About this bridge

S405-N710/710 Sep over Route 710 & Connectors is a concrete continuous box beam or girders - multiple carrying S405-N710/710 Sep over Route 710 & Connectors in Los Angeles County, California. It was built in 1961, so it is 64 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 25,000 vehicles a day, roughly 10% of them trucks, projected to reach 31,243 by 2046. The structure is 605 ft (184.4 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS405-N710/710 Sep
CrossesRoute 710 & Connectors
Location07-LA-405-7.66-LBCH
RouteInterstate 405
CountyLos Angeles County
StateCalifornia
Coordinates33.82878, -118.20881
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.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating86 US tons
Inventory rating51.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length605 ft (184.4 m)
Longest span117 ft (35.7 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,000 (2019)
Projected traffic31,243 by 2046
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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-N710/710 Sep over Route 710 & Connectors built?

It was built in 1961, making it 64 years old in 2025.

What condition is S405-N710/710 Sep over Route 710 & Connectors 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 July 2024.

How much traffic does S405-N710/710 Sep over Route 710 & Connectors carry?

About 25,000 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is S405-N710/710 Sep over Route 710 & Connectors?

The structure is 605 ft (184.4 m) long with a longest span of 117 ft (35.7 m) and a deck 34 ft wide.

Who owns S405-N710/710 Sep over Route 710 & Connectors?

It is owned by the State Highway Agency.