US Bridges

Interstate 405 over UP RR AMTRAK Metrolink

Fair

Los Angeles County, California · 07-LA-405-43.42-LA · Structure no. 53 1348

Built
1963
62 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
162 ft
1 main span
Daily traffic
216,000
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 405 over UP RR AMTRAK Metrolink is a prestressed concrete stringer/multi-beam or girder carrying Interstate 405 over UP RR AMTRAK Metrolink in Los Angeles County, California. It was built in 1963, so it is 62 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 216,000 vehicles a day, roughly 10% of them trucks, projected to reach 295,723 by 2040. The structure is 162 ft (49.4 m) long and 141 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesInterstate 405
CrossesUP RR AMTRAK Metrolink
Location07-LA-405-43.42-LA
RouteInterstate 405
CountyLos Angeles County
StateCalifornia
Coordinates34.21629, -118.47304
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.3 US tons
Inventory rating15.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length162 ft (49.4 m)
Longest span68 ft (20.7 m)
Deck width141 ft (43 m)
Roadway width138 ft (42.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic216,000 (2019)
Projected traffic295,723 by 2040
Trucks10%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 Interstate 405 over UP RR AMTRAK Metrolink built?

It was built in 1963, making it 62 years old in 2025.

What condition is Interstate 405 over UP RR AMTRAK Metrolink 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 October 2023.

How much traffic does Interstate 405 over UP RR AMTRAK Metrolink carry?

About 216,000 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is Interstate 405 over UP RR AMTRAK Metrolink?

The structure is 162 ft (49.4 m) long with a longest span of 68 ft (20.7 m) and a deck 141 ft wide.

Who owns Interstate 405 over UP RR AMTRAK Metrolink?

It is owned by the State Highway Agency.