US Bridges

N5TRUCK-N14 over Sierra HWY

Good

Los Angeles County, California · 07-LA-005S-C45.74-LA · Structure no. 53 1936G

Built
1971
54 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
186 ft
3 main spans
Daily traffic
23,315
2018 count
Owner
State
State Highway Agency

About this bridge

N5TRUCK-N14 over Sierra HWY is a concrete continuous box beam or girders - multiple carrying N5TRUCK-N14 over Sierra HWY in Los Angeles County, California. It was built in 1971, so it is 54 years old, younger 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 23,315 vehicles a day, roughly 8% of them trucks, projected to reach 28,949 by 2041. The structure is 186 ft (56.6 m) long and 52 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesN5TRUCK-N14
CrossesSierra HWY
Location07-LA-005S-C45.74-LA
RouteInterstate 5
Coordinates34.33831, -118.50644
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 inspectionAugust 2023
Inspection intervalevery 24 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 alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating35.4 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length186 ft (56.6 m)
Longest span106 ft (32.3 m)
Deck width52 ft (16 m)
Roadway width51 ft (15.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,315 (2018)
Projected traffic28,949 by 2041
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 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 N5TRUCK-N14 over Sierra HWY built?

It was built in 1971, making it 54 years old in 2025.

What condition is N5TRUCK-N14 over Sierra HWY 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 August 2023.

How much traffic does N5TRUCK-N14 over Sierra HWY carry?

About 23,315 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is N5TRUCK-N14 over Sierra HWY?

The structure is 186 ft (56.6 m) long with a longest span of 106 ft (32.3 m) and a deck 52 ft wide.

Who owns N5TRUCK-N14 over Sierra HWY?

It is owned by the State Highway Agency.