US Bridges

Interstate 710 over Los Angeles River

Fair

Los Angeles County, California · 07-LA-710-17.34-SGT · Structure no. 53 0828

Built
1955
70 years old, rebuilt 1965
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
574 ft
4 main spans
Daily traffic
220,000
2017 count
Owner
State
State Highway Agency

About this bridge

Interstate 710 over Los Angeles River is a steel continuous stringer/multi-beam or girder carrying Interstate 710 over Los Angeles River in Los Angeles County, California. It was built in 1955 and reconstructed in 1965, so it is 70 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 220,000 vehicles a day, roughly 14% of them trucks, projected to reach 234,092 by 2041. The structure is 574 ft (175 m) long and 120 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 710
CrossesLos Angeles River
Location07-LA-710-17.34-SGT
RouteInterstate 710
Coordinates33.93502, -118.17601
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating77.8 US tons
Inventory rating46.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length574 ft (175 m)
Longest span150 ft (45.7 m)
Deck width120 ft (36.6 m)
Roadway width114 ft (34.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220,000 (2017)
Projected traffic234,092 by 2041
Trucks14%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 710 over Los Angeles River built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1965.

What condition is Interstate 710 over Los Angeles River 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 May 2024.

How much traffic does Interstate 710 over Los Angeles River carry?

About 220,000 vehicles per day (2017 count), of which roughly 14% are trucks.

How long is Interstate 710 over Los Angeles River?

The structure is 574 ft (175 m) long with a longest span of 150 ft (45.7 m) and a deck 120 ft wide.

Who owns Interstate 710 over Los Angeles River?

It is owned by the State Highway Agency.