US Bridges

Interstate 5 over Cohasset Street

Good

Los Angeles County, California · 07-LA-005-31.86-BRB · Structure no. 53 1111

Built
1960
65 years old, rebuilt 2013
Condition
Good
inspected December 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
89 ft
1 main span
Daily traffic
187,358
2011 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Cohasset Street is a concrete box beam or girders - multiple carrying Interstate 5 over Cohasset Street in Los Angeles County, California. It was built in 1960 and reconstructed in 2013, 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 187,358 vehicles a day, roughly 9% of them trucks, projected to reach 245,307 by 2042. The structure is 89 ft (27.1 m) long and 180 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 5
CrossesCohasset Street
Location07-LA-005-31.86-BRB
RouteInterstate 5
Coordinates34.20644, -118.34271
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.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 48 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 alignment9: Superior to present desirable criteria
Operating rating110 US tons
Inventory rating74 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length89 ft (27.1 m)
Longest span84 ft (25.6 m)
Deck width180 ft (54.9 m)
Roadway width175 ft (53.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic187,358 (2011)
Projected traffic245,307 by 2042
Trucks9%
Lanes on structure12
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 5 over Cohasset Street built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2013.

What condition is Interstate 5 over Cohasset 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 December 2024.

How much traffic does Interstate 5 over Cohasset Street carry?

About 187,358 vehicles per day (2011 count), of which roughly 9% are trucks.

How long is Interstate 5 over Cohasset Street?

The structure is 89 ft (27.1 m) long with a longest span of 84 ft (25.6 m) and a deck 180 ft wide.

Who owns Interstate 5 over Cohasset Street?

It is owned by the State Highway Agency.