US Bridges

N5-1st Off-Ramp over Interstate 5

Good

Orange County, California · 12-ORA-005-31.08-SA · Structure no. 55 0661S

Built
1996
29 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
240 ft
2 main spans
Daily traffic
10,022
2014 count
Owner
State
State Highway Agency

About this bridge

N5-1st Off-Ramp over Interstate 5 is a prestressed concrete continuous box beam or girders - multiple carrying N5-1st Off-Ramp over Interstate 5 in Orange County, California. It was built in 1996, so it is 29 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 10,022 vehicles a day, roughly 3% of them trucks, projected to reach 10,608 by 2043. The structure is 240 ft (73.2 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesN5-1st Off-Ramp
CrossesInterstate 5
Location12-ORA-005-31.08-SA
RouteInterstate 5
CountyOrange County
StateCalifornia
Coordinates33.74775, -117.84348
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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length240 ft (73.2 m)
Longest span129 ft (39.3 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deck19 ft (5.7 m)

Traffic and service

Average daily traffic10,022 (2014)
Projected traffic10,608 by 2043
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 N5-1st Off-Ramp over Interstate 5 built?

It was built in 1996, making it 29 years old in 2025.

What condition is N5-1st Off-Ramp over Interstate 5 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 N5-1st Off-Ramp over Interstate 5 carry?

About 10,022 vehicles per day (2014 count), of which roughly 3% are trucks.

How long is N5-1st Off-Ramp over Interstate 5?

The structure is 240 ft (73.2 m) long with a longest span of 129 ft (39.3 m) and a deck 40 ft wide.

Who owns N5-1st Off-Ramp over Interstate 5?

It is owned by the State Highway Agency.