US Bridges

I 5 NB over I 5 SB

Fair

Los Angeles County, California · 07-LA-005-R64.49R · Structure no. 53 1903R

Built
1970
55 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
305 ft
3 main spans
Daily traffic
36,657
2018 count
Owner
State
State Highway Agency

About this bridge

I 5 NB over I 5 SB is a concrete continuous box beam or girders - multiple carrying I 5 NB over I 5 SB in Los Angeles County, California. It was built in 1970, so it is 55 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 36,657 vehicles a day, roughly 29% of them trucks, projected to reach 52,859 by 2041. The structure is 305 ft (92.9 m) long and 68 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesI 5 NB
CrossesI 5 SB
Location07-LA-005-R64.49R
RouteInterstate 5
CountyLos Angeles County
StateCalifornia
Coordinates34.55314, -118.67069
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
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 geometry6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length305 ft (92.9 m)
Longest span136 ft (41.5 m)
Deck width68 ft (20.7 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,657 (2018)
Projected traffic52,859 by 2041
Trucks29%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 I 5 NB over I 5 SB built?

It was built in 1970, making it 55 years old in 2025.

What condition is I 5 NB over I 5 SB 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 July 2023.

How much traffic does I 5 NB over I 5 SB carry?

About 36,657 vehicles per day (2018 count), of which roughly 29% are trucks.

How long is I 5 NB over I 5 SB?

The structure is 305 ft (92.9 m) long with a longest span of 136 ft (41.5 m) and a deck 68 ft wide.

Who owns I 5 NB over I 5 SB?

It is owned by the State Highway Agency.