US Bridges

Interstate 605 over Dunlap Crossing Road

Fair

Los Angeles County, California · 07-LA-605-R12.85-SFSP · Structure no. 53 1669

Built
1965
60 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
136 ft
3 main spans
Daily traffic
221,000
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 605 over Dunlap Crossing Road is a concrete continuous box beam or girders - multiple carrying Interstate 605 over Dunlap Crossing Road 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 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 221,000 vehicles a day, roughly 11% of them trucks, projected to reach 268,410 by 2045. The structure is 136 ft (41.6 m) long and 141 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 605
CrossesDunlap Crossing Road
Location07-LA-605-R12.85-SFSP
RouteInterstate 605
Coordinates33.98345, -118.07304
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.1 US tons
Inventory rating32.5 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length136 ft (41.6 m)
Longest span82 ft (25.1 m)
Deck width141 ft (42.9 m)
Roadway width135 ft (41 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic221,000 (2022)
Projected traffic268,410 by 2045
Trucks11%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 605 over Dunlap Crossing Road built?

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

What condition is Interstate 605 over Dunlap Crossing Road 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 March 2024.

How much traffic does Interstate 605 over Dunlap Crossing Road carry?

About 221,000 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Interstate 605 over Dunlap Crossing Road?

The structure is 136 ft (41.6 m) long with a longest span of 82 ft (25.1 m) and a deck 141 ft wide.

Who owns Interstate 605 over Dunlap Crossing Road?

It is owned by the State Highway Agency.