US Bridges

Avenue 43 over Arroyo Seco Channel

Good

Los Angeles County, California · At SR 110 · Structure no. 53C1877

Built
1939
86 years old
Condition
Good
inspected September 2024
Type
Tee Beam
Concrete Continuous
Length
80 ft
1 main span
Daily traffic
4,001
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Avenue 43 over Arroyo Seco Channel is a concrete continuous tee beam carrying Avenue 43 over Arroyo Seco Channel in Los Angeles County, California. It was built in 1939, so it is 86 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,001 vehicles a day, roughly 2% of them trucks, projected to reach 10,477 by 2042. The structure is 80 ft (24.3 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesAvenue 43
CrossesArroyo Seco Channel
LocationAt SR 110
RouteCity Street 0
Coordinates34.09314, -118.20615
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.7 US tons
Inventory rating25.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length80 ft (24.3 m)
Longest span76 ft (23.1 m)
Deck width39 ft (11.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,001 (2016)
Projected traffic10,477 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Avenue 43 over Arroyo Seco Channel built?

It was built in 1939, making it 86 years old in 2025.

What condition is Avenue 43 over Arroyo Seco Channel in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does Avenue 43 over Arroyo Seco Channel carry?

About 4,001 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Avenue 43 over Arroyo Seco Channel?

The structure is 80 ft (24.3 m) long with a longest span of 76 ft (23.1 m) and a deck 39 ft wide.

Who owns Avenue 43 over Arroyo Seco Channel?

It is owned by the City or Municipal Highway Agency.