US Bridges

Louise Ave over Route 101

Fair

Los Angeles County, California · 07-LA-101-19.74-LA · Structure no. 53 1053

Built
1958
67 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete Continuous
Length
145 ft
2 main spans
Daily traffic
7,360
2018 count
Owner
State
State Highway Agency

About this bridge

Louise Ave over Route 101 is a concrete continuous tee beam carrying Louise Ave over Route 101 in Los Angeles County, California. It was built in 1958, so it is 67 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 7,360 vehicles a day, roughly 2% of them trucks, projected to reach 16,087 by 2045. The structure is 145 ft (44.2 m) long and 77 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesLouise Ave
CrossesRoute 101
Location07-LA-101-19.74-LA
RouteCity Street 0L564
Coordinates34.171, -118.50972
Functional classUrban Minor Arterial

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.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.5 US tons
Inventory rating49.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length145 ft (44.2 m)
Longest span69 ft (21 m)
Deck width77 ft (23.4 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,360 (2018)
Projected traffic16,087 by 2045
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Louise Ave over Route 101 built?

It was built in 1958, making it 67 years old in 2025.

What condition is Louise Ave over Route 101 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 Louise Ave over Route 101 carry?

About 7,360 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Louise Ave over Route 101?

The structure is 145 ft (44.2 m) long with a longest span of 69 ft (21 m) and a deck 77 ft wide.

Who owns Louise Ave over Route 101?

It is owned by the State Highway Agency.