US Bridges

Interstate 110 NB over 39th Street

Fair

Los Angeles County, California · 07-LA-110-19.68-LA · Structure no. 53 0901R

Built
1996
29 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
128 ft
1 main span
Daily traffic
162,000
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 110 NB over 39th Street is a prestressed concrete box beam or girders - multiple carrying Interstate 110 NB over 39th Street in Los Angeles County, California. It was built in 1996, so it is 29 years old, younger 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 162,000 vehicles a day, roughly 5% of them trucks, projected to reach 170,774 by 2042. The structure is 128 ft (39 m) long and 107 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 110 NB
Crosses39th Street
Location07-LA-110-19.68-LA
RouteInterstate 110
Coordinates34.01355, -118.28049
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length128 ft (39 m)
Longest span123 ft (37.5 m)
Deck width107 ft (32.6 m)
Roadway width104 ft (31.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic162,000 (2022)
Projected traffic170,774 by 2042
Trucks5%
Lanes on structure8
Traffic directionOne-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 110 NB over 39th Street built?

It was built in 1996, making it 29 years old in 2025.

What condition is Interstate 110 NB over 39th Street 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 September 2023.

How much traffic does Interstate 110 NB over 39th Street carry?

About 162,000 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Interstate 110 NB over 39th Street?

The structure is 128 ft (39 m) long with a longest span of 123 ft (37.5 m) and a deck 107 ft wide.

Who owns Interstate 110 NB over 39th Street?

It is owned by the State Highway Agency.