US Bridges

Interstate 710 over Laguna Channel

Fair

Los Angeles County, California · 07-LA-710-25.26-MONP · Structure no. 53 1642

Built
1961
64 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
127,000
2017 count
Owner
State
State Highway Agency

About this bridge

Interstate 710 over Laguna Channel is a concrete culvert carrying Interstate 710 over Laguna Channel in Los Angeles County, California. It was built in 1961, so it is 64 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 127,000 vehicles a day, roughly 5% of them trucks, projected to reach 170,892 by 2041. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesInterstate 710
CrossesLaguna Channel
Location07-LA-710-25.26-MONP
RouteInterstate 710
CountyLos Angeles County
StateCalifornia
Coordinates34.04823, -118.16711
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic127,000 (2017)
Projected traffic170,892 by 2041
Trucks5%
Lanes on structure6
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 Laguna Channel built?

It was built in 1961, making it 64 years old in 2025.

What condition is Interstate 710 over Laguna Channel 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 August 2024.

How much traffic does Interstate 710 over Laguna Channel carry?

About 127,000 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Interstate 710 over Laguna Channel?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Interstate 710 over Laguna Channel?

It is owned by the State Highway Agency.