US Bridges

Interstate 5 over San Gabriel River

Fair

Los Angeles County, California · 07-LA-005-7.06-DNY · Structure no. 53 0213

Built
1953
72 years old, rebuilt 1965
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete Continuous
Length
670 ft
9 main spans
Daily traffic
234,600
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over San Gabriel River is a concrete continuous tee beam carrying Interstate 5 over San Gabriel River in Los Angeles County, California. It was built in 1953 and reconstructed in 1965, so it is 72 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 234,600 vehicles a day, roughly 7% of them trucks, projected to reach 292,762 by 2044. The structure is 670 ft (204.2 m) long and 126 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 5
CrossesSan Gabriel River
Location07-LA-005-7.06-DNY
RouteInterstate 5
Coordinates33.94421, -118.09837
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating51.9 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length670 ft (204.2 m)
Longest span74 ft (22.6 m)
Deck width126 ft (38.4 m)
Roadway width112 ft (34.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic234,600 (2022)
Projected traffic292,762 by 2044
Trucks7%
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 5 over San Gabriel River built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1965.

What condition is Interstate 5 over San Gabriel 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 November 2024.

How much traffic does Interstate 5 over San Gabriel River carry?

About 234,600 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Interstate 5 over San Gabriel River?

The structure is 670 ft (204.2 m) long with a longest span of 74 ft (22.6 m) and a deck 126 ft wide.

Who owns Interstate 5 over San Gabriel River?

It is owned by the State Highway Agency.