US Bridges

Avenue 43 over ST RTE 110 & Arroyo Seco

Good

Los Angeles County, California · 07-LA-110-27.12-LA · Structure no. 53 0427

Built
1939
86 years old
Condition
Good
inspected June 2023
Type
Tee Beam
Concrete Continuous
Length
195 ft
3 main spans
Daily traffic
10,000
2021 count
Owner
State
State Highway Agency

About this bridge

Avenue 43 over ST RTE 110 & Arroyo Seco is a concrete continuous tee beam carrying Avenue 43 over ST RTE 110 & Arroyo Seco 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 10,000 vehicles a day, roughly 1% of them trucks, projected to reach 11,296 by 2040. The structure is 195 ft (59.4 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesAvenue 43
CrossesST RTE 110 & Arroyo Seco
Location07-LA-110-27.12-LA
RouteCity Street 0
Coordinates34.09331, -118.20646
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment9: Superior to present desirable criteria
Operating rating35.7 US tons
Inventory rating25.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length195 ft (59.4 m)
Longest span69 ft (21 m)
Deck width39 ft (11.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2021)
Projected traffic11,296 by 2040
Trucks1%
Lanes on structure2
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 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 ST RTE 110 & Arroyo Seco built?

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

What condition is Avenue 43 over ST RTE 110 & Arroyo Seco 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 June 2023.

How much traffic does Avenue 43 over ST RTE 110 & Arroyo Seco carry?

About 10,000 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Avenue 43 over ST RTE 110 & Arroyo Seco?

The structure is 195 ft (59.4 m) long with a longest span of 69 ft (21 m) and a deck 39 ft wide.

Who owns Avenue 43 over ST RTE 110 & Arroyo Seco?

It is owned by the State Highway Agency.