US Bridges

Interstate 10 over Robertson BL-W10 on Ramp

Fair

Los Angeles County, California · 07-LA-010-R7.83-LA · Structure no. 53 1556

Built
1964
61 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
158 ft
3 main spans
Daily traffic
275,000
2024 count
Owner
State
State Highway Agency

About this bridge

Interstate 10 over Robertson BL-W10 on Ramp is a concrete continuous box beam or girders - multiple carrying Interstate 10 over Robertson BL-W10 on Ramp 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 275,000 vehicles a day, projected to reach 283,085 by 2042. The structure is 158 ft (48.2 m) long and 141 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesInterstate 10
CrossesRobertson BL-W10 on Ramp
Location07-LA-010-R7.83-LA
RouteInterstate 10
CountyLos Angeles County
StateCalifornia
Coordinates34.02973, -118.39259
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 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 alignment7: Better than present minimum criteria
Operating rating40.3 US tons
Inventory rating31.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length158 ft (48.2 m)
Longest span78 ft (23.8 m)
Deck width141 ft (42.9 m)
Roadway width136 ft (41.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275,000 (2024)
Projected traffic283,085 by 2042
Trucks0%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 Robertson BL-W10 on Ramp built?

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

What condition is Interstate 10 over Robertson BL-W10 on Ramp in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does Interstate 10 over Robertson BL-W10 on Ramp carry?

About 275,000 vehicles per day (2024 count).

How long is Interstate 10 over Robertson BL-W10 on Ramp?

The structure is 158 ft (48.2 m) long with a longest span of 78 ft (23.8 m) and a deck 141 ft wide.

Who owns Interstate 10 over Robertson BL-W10 on Ramp?

It is owned by the State Highway Agency.