US Bridges

Interstate 5 NB over Marietta Street

Good

Los Angeles County, California · 07-LA-005-16.29-LA · Structure no. 53 1387R

Built
1960
65 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
134 ft
3 main spans
Daily traffic
129,000
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 NB over Marietta Street is a concrete continuous box beam or girders - multiple carrying Interstate 5 NB over Marietta Street in Los Angeles County, California. It was built in 1960, so it is 65 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 129,000 vehicles a day, roughly 7% of them trucks, projected to reach 133,800 by 2045. The structure is 134 ft (40.8 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 5 NB
CrossesMarietta Street
Location07-LA-005-16.29-LA
RouteInterstate 5
Coordinates34.02889, -118.21287
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.
Substructure8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating32.2 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length134 ft (40.8 m)
Longest span55 ft (16.8 m)
Deck width42 ft (12.7 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic129,000 (2019)
Projected traffic133,800 by 2045
Trucks7%
Lanes on structure2
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 5 NB over Marietta Street built?

It was built in 1960, making it 65 years old in 2025.

What condition is Interstate 5 NB over Marietta Street 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 January 2025.

How much traffic does Interstate 5 NB over Marietta Street carry?

About 129,000 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is Interstate 5 NB over Marietta Street?

The structure is 134 ft (40.8 m) long with a longest span of 55 ft (16.8 m) and a deck 42 ft wide.

Who owns Interstate 5 NB over Marietta Street?

It is owned by the State Highway Agency.