US Bridges

Fourth ST over Route 1

Good

Los Angeles County, California · 07-LA-001-R34.89-SMCA · Structure no. 53 1592

Built
1965
60 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
153 ft
2 main spans
Daily traffic
34,000
2017 count
Owner
State
State Highway Agency

About this bridge

Fourth ST over Route 1 is a concrete continuous box beam or girders - multiple carrying Fourth ST over Route 1 in Los Angeles County, California. It was built in 1965, so it is 60 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 34,000 vehicles a day, roughly 2% of them trucks, projected to reach 39,812 by 2040. The structure is 153 ft (46.6 m) long and 75 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFourth ST
CrossesRoute 1
Location07-LA-001-R34.89-SMCA
RouteCity Street 0L659
Coordinates34.0124, -118.49034
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating43.5 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length153 ft (46.6 m)
Longest span74 ft (22.6 m)
Deck width75 ft (22.9 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,000 (2017)
Projected traffic39,812 by 2040
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
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 Fourth ST over Route 1 built?

It was built in 1965, making it 60 years old in 2025.

What condition is Fourth ST over Route 1 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 August 2023.

How much traffic does Fourth ST over Route 1 carry?

About 34,000 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Fourth ST over Route 1?

The structure is 153 ft (46.6 m) long with a longest span of 74 ft (22.6 m) and a deck 75 ft wide.

Who owns Fourth ST over Route 1?

It is owned by the State Highway Agency.