US Bridges

Interstate 405 over Ballona Creek

Good

Los Angeles County, California · 07-LA-405-26.49-CLC · Structure no. 53 1256

Built
1960
65 years old, rebuilt 2009
Condition
Good
inspected February 2025
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
246 ft
3 main spans
Daily traffic
294,000
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 405 over Ballona Creek is a concrete continuous box beam or girders - multiple carrying Interstate 405 over Ballona Creek in Los Angeles County, California. It was built in 1960 and reconstructed in 2009, 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 294,000 vehicles a day, roughly 4% of them trucks, projected to reach 424,622 by 2043. The structure is 246 ft (75 m) long and 205 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesInterstate 405
CrossesBallona Creek
Location07-LA-405-26.49-CLC
RouteInterstate 405
Coordinates33.99454, -118.40407
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating98.5 US tons
Inventory rating59.3 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length246 ft (75 m)
Longest span88 ft (26.8 m)
Deck width205 ft (62.5 m)
Roadway width200 ft (61 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic294,000 (2020)
Projected traffic424,622 by 2043
Trucks4%
Lanes on structure13
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 405 over Ballona Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2009.

What condition is Interstate 405 over Ballona Creek 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 February 2025.

How much traffic does Interstate 405 over Ballona Creek carry?

About 294,000 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Interstate 405 over Ballona Creek?

The structure is 246 ft (75 m) long with a longest span of 88 ft (26.8 m) and a deck 205 ft wide.

Who owns Interstate 405 over Ballona Creek?

It is owned by the State Highway Agency.