US Bridges

U.S. Highway 101 over Los Angeles River

Fair

Los Angeles County, California · 07-LA-101-10.83-LA · Structure no. 53 1224

Built
1957
68 years old, rebuilt 1992
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
137 ft
1 main span
Daily traffic
175,000
2021 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 101 over Los Angeles River is a steel stringer/multi-beam or girder carrying U.S. Highway 101 over Los Angeles River in Los Angeles County, California. It was built in 1957 and reconstructed in 1992, so it is 68 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 6 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 175,000 vehicles a day, roughly 10% of them trucks, projected to reach 228,269 by 2042. The structure is 137 ft (41.8 m) long and 128 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesU.S. Highway 101
CrossesLos Angeles River
Location07-LA-101-10.83-LA
RouteU.S. Route 101
Coordinates34.14342, -118.36727
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.4 US tons
Inventory rating51.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length137 ft (41.8 m)
Longest span133 ft (40.4 m)
Deck width128 ft (38.9 m)
Roadway width123 ft (37.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175,000 (2021)
Projected traffic228,269 by 2042
Trucks10%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 U.S. Highway 101 over Los Angeles River built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1992.

What condition is U.S. Highway 101 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 March 2024.

How much traffic does U.S. Highway 101 over Los Angeles River carry?

About 175,000 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is U.S. Highway 101 over Los Angeles River?

The structure is 137 ft (41.8 m) long with a longest span of 133 ft (40.4 m) and a deck 128 ft wide.

Who owns U.S. Highway 101 over Los Angeles River?

It is owned by the State Highway Agency.