US Bridges

NB BELLFLOWER-N405 over Bellflower Uc

Good

Los Angeles County, California · 07-LA-405-2.25-LBCH · Structure no. 53 1194S

Built
1963
62 years old
Condition
Good
inspected December 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
408 ft
6 main spans
Daily traffic
8,500
2021 count
Owner
State
State Highway Agency

About this bridge

NB BELLFLOWER-N405 over Bellflower Uc is a concrete continuous box beam or girders - multiple carrying NB BELLFLOWER-N405 over Bellflower Uc in Los Angeles County, California. It was built in 1963, so it is 62 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 8,500 vehicles a day, roughly 4% of them trucks, projected to reach 13,041 by 2041. The structure is 408 ft (124.4 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNB BELLFLOWER-N405
CrossesBellflower Uc
Location07-LA-405-2.25-LBCH
RouteInterstate 405
Coordinates33.80351, -118.12473
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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating82.1 US tons
Inventory rating49.3 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length408 ft (124.4 m)
Longest span97 ft (29.6 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,500 (2021)
Projected traffic13,041 by 2041
Trucks4%
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 NB BELLFLOWER-N405 over Bellflower Uc built?

It was built in 1963, making it 62 years old in 2025.

What condition is NB BELLFLOWER-N405 over Bellflower Uc 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 NB BELLFLOWER-N405 over Bellflower Uc carry?

About 8,500 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is NB BELLFLOWER-N405 over Bellflower Uc?

The structure is 408 ft (124.4 m) long with a longest span of 97 ft (29.6 m) and a deck 34 ft wide.

Who owns NB BELLFLOWER-N405 over Bellflower Uc?

It is owned by the State Highway Agency.