US Bridges

First ST over Interstate 710

Good

Los Angeles County, California · 07-LA-710-24.72-LA · Structure no. 53 1153

Built
1960
65 years old, rebuilt 1990
Condition
Good
inspected August 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
144 ft
2 main spans
Daily traffic
13,200
2010 count
Owner
State
State Highway Agency

About this bridge

First ST over Interstate 710 is a steel stringer/multi-beam or girder carrying First ST over Interstate 710 in Los Angeles County, California. It was built in 1960 and reconstructed in 1990, so it is 65 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 13,200 vehicles a day, roughly 1% of them trucks, projected to reach 19,431 by 2044. The structure is 144 ft (43.9 m) long and 78 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFirst ST
CrossesInterstate 710
Location07-LA-710-24.72-LA
RouteCounty Highway 0L245
CountyLos Angeles County
StateCalifornia
Coordinates34.03687, -118.17031
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 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length144 ft (43.9 m)
Longest span70 ft (21.3 m)
Deck width78 ft (23.8 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,200 (2010)
Projected traffic19,431 by 2044
Trucks1%
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 First ST over Interstate 710 built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1990.

What condition is First ST over Interstate 710 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 2022.

How much traffic does First ST over Interstate 710 carry?

About 13,200 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is First ST over Interstate 710?

The structure is 144 ft (43.9 m) long with a longest span of 70 ft (21.3 m) and a deck 78 ft wide.

Who owns First ST over Interstate 710?

It is owned by the State Highway Agency.