US Bridges

Interstate 10 over Harcourt Ave

Good

Los Angeles County, California · 07-LA-010-R10.72-LA · Structure no. 53 1587

Built
1964
61 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
143 ft
3 main spans
Daily traffic
273,000
2018 count
Owner
State
State Highway Agency

About this bridge

Interstate 10 over Harcourt Ave is a concrete continuous box beam or girders - multiple carrying Interstate 10 over Harcourt Ave in Los Angeles County, California. It was built in 1964, so it is 61 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 273,000 vehicles a day, roughly 4% of them trucks, projected to reach 311,216 by 2042. The structure is 143 ft (43.5 m) long and 178 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 10
CrossesHarcourt Ave
Location07-LA-010-R10.72-LA
RouteInterstate 10
Coordinates34.03425, -118.34554
Functional classUrban Principal Arterial - Interstate

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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length143 ft (43.5 m)
Longest span73 ft (22.1 m)
Deck width178 ft (54.4 m)
Roadway width172 ft (52.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic273,000 (2018)
Projected traffic311,216 by 2042
Trucks4%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Interstate 10 over Harcourt Ave built?

It was built in 1964, making it 61 years old in 2025.

What condition is Interstate 10 over Harcourt Ave 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 July 2024.

How much traffic does Interstate 10 over Harcourt Ave carry?

About 273,000 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is Interstate 10 over Harcourt Ave?

The structure is 143 ft (43.5 m) long with a longest span of 73 ft (22.1 m) and a deck 178 ft wide.

Who owns Interstate 10 over Harcourt Ave?

It is owned by the State Highway Agency.