US Bridges

Interstate 605 over Carson Street

Fair

Los Angeles County, California · 07-LA-605-R1.74-LKW · Structure no. 53 1722

Built
1966
59 years old, rebuilt 2001
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
179 ft
4 main spans
Daily traffic
209,000
2021 count
Owner
State
State Highway Agency

About this bridge

Interstate 605 over Carson Street is a prestressed concrete continuous stringer/multi-beam or girder carrying Interstate 605 over Carson Street in Los Angeles County, California. It was built in 1966 and reconstructed in 2001, so it is 59 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 209,000 vehicles a day, roughly 5% of them trucks, projected to reach 240,444 by 2042. The structure is 179 ft (54.6 m) long and 193 ft wide.

CarriesInterstate 605
CrossesCarson Street
Location07-LA-605-R1.74-LKW
RouteInterstate 605
Coordinates33.83123, -118.08362
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating41.8 US tons
Inventory rating30 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length179 ft (54.6 m)
Longest span59 ft (18 m)
Deck width193 ft (58.7 m)
Roadway width189 ft (57.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic209,000 (2021)
Projected traffic240,444 by 2042
Trucks5%
Lanes on structure12
Traffic directionTwo-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 Interstate 605 over Carson Street built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2001.

What condition is Interstate 605 over Carson Street 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 June 2023.

How much traffic does Interstate 605 over Carson Street carry?

About 209,000 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Interstate 605 over Carson Street?

The structure is 179 ft (54.6 m) long with a longest span of 59 ft (18 m) and a deck 193 ft wide.

Who owns Interstate 605 over Carson Street?

It is owned by the State Highway Agency.