US Bridges

West ST-N5 on Ramp over Interstate 5

Fair

Orange County, California · 12-ORA-005-38.15-ANA · Structure no. 55 0837S

Built
2000
25 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
496 ft
3 main spans
Daily traffic
9,598
2015 count
Owner
State
State Highway Agency

About this bridge

West ST-N5 on Ramp over Interstate 5 is a prestressed concrete continuous box beam or girders - single or spread carrying West ST-N5 on Ramp over Interstate 5 in Orange County, California. It was built in 2000, so it is 25 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 9,598 vehicles a day, roughly 3% of them trucks, projected to reach 10,535 by 2044. The structure is 496 ft (151.3 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesWest ST-N5 on Ramp
CrossesInterstate 5
Location12-ORA-005-38.15-ANA
RouteInterstate 5
CountyOrange County
StateCalifornia
Coordinates33.82186, -117.92263
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length496 ft (151.3 m)
Longest span197 ft (60.1 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,598 (2015)
Projected traffic10,535 by 2044
Trucks3%
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 NetworkNon-Interstate 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 West ST-N5 on Ramp over Interstate 5 built?

It was built in 2000, making it 25 years old in 2025.

What condition is West ST-N5 on Ramp over Interstate 5 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does West ST-N5 on Ramp over Interstate 5 carry?

About 9,598 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is West ST-N5 on Ramp over Interstate 5?

The structure is 496 ft (151.3 m) long with a longest span of 197 ft (60.1 m) and a deck 35 ft wide.

Who owns West ST-N5 on Ramp over Interstate 5?

It is owned by the State Highway Agency.