US Bridges

RTE 5/10 Sep over I 10 & Off-Ramp

Fair

Los Angeles County, California · 07-LA-005-18.42-LA · Structure no. 53 1329

Built
1959
66 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
290 ft
5 main spans
Daily traffic
230,520
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 5/10 Sep over I 10 & Off-Ramp is a concrete continuous box beam or girders - multiple carrying RTE 5/10 Sep over I 10 & Off-Ramp in Los Angeles County, California. It was built in 1959, so it is 66 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 230,520 vehicles a day, roughly 7% of them trucks, projected to reach 257,000 by 2041. The structure is 290 ft (88.4 m) long and 122 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRTE 5/10 Sep
CrossesI 10 & Off-Ramp
Location07-LA-005-18.42-LA
RouteInterstate 5
CountyLos Angeles County
StateCalifornia
Coordinates34.05485, -118.21394
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating28.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length290 ft (88.4 m)
Longest span73 ft (22.1 m)
Deck width122 ft (37.1 m)
Roadway width116 ft (35.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic230,520 (2020)
Projected traffic257,000 by 2041
Trucks7%
Lanes on structure8
Traffic directionTwo-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 RTE 5/10 Sep over I 10 & Off-Ramp built?

It was built in 1959, making it 66 years old in 2025.

What condition is RTE 5/10 Sep over I 10 & Off-Ramp 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 March 2023.

How much traffic does RTE 5/10 Sep over I 10 & Off-Ramp carry?

About 230,520 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is RTE 5/10 Sep over I 10 & Off-Ramp?

The structure is 290 ft (88.4 m) long with a longest span of 73 ft (22.1 m) and a deck 122 ft wide.

Who owns RTE 5/10 Sep over I 10 & Off-Ramp?

It is owned by the State Highway Agency.