US Bridges

E&W105-S405 Conn over 120th Street

Good

Los Angeles County, California · 07-LA-105-R2.02 · Structure no. 53 1240H

Built
1989
36 years old
Condition
Good
inspected April 2022
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
165 ft
3 main spans
Daily traffic
31,572
2014 count
Owner
State
State Highway Agency

About this bridge

E&W105-S405 Conn over 120th Street is a concrete continuous box beam or girders - multiple carrying E&W105-S405 Conn over 120th Street in Los Angeles County, California. It was built in 1989, so it is 36 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 31,572 vehicles a day, roughly 2% of them trucks, projected to reach 36,484 by 2040. The structure is 165 ft (50.3 m) long and 42 ft wide.

CarriesE&W105-S405 Conn
Crosses120th Street
Location07-LA-105-R2.02
RouteInterstate 105
Coordinates33.92399, -118.36918
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.
Substructure7 GoodSome minor problems.
Last inspectionApril 2022
Inspection intervalevery 48 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

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length165 ft (50.3 m)
Longest span90 ft (27.4 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,572 (2014)
Projected traffic36,484 by 2040
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 E&W105-S405 Conn over 120th Street built?

It was built in 1989, making it 36 years old in 2025.

What condition is E&W105-S405 Conn over 120th Street 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 April 2022.

How much traffic does E&W105-S405 Conn over 120th Street carry?

About 31,572 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is E&W105-S405 Conn over 120th Street?

The structure is 165 ft (50.3 m) long with a longest span of 90 ft (27.4 m) and a deck 42 ft wide.

Who owns E&W105-S405 Conn over 120th Street?

It is owned by the State Highway Agency.