US Bridges

N5-STATE Col Offra over Chapman AVE-N5 On-Ramp

Good

Orange County, California · 12-ORA-005-35.00-ANA · Structure no. 55 0960S

Built
2000
25 years old
Condition
Good
inspected January 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
548 ft
3 main spans
Daily traffic
7,492
2015 count
Owner
State
State Highway Agency

About this bridge

N5-STATE Col Offra over Chapman AVE-N5 On-Ramp is a prestressed concrete continuous box beam or girders - single or spread carrying N5-STATE Col Offra over Chapman AVE-N5 On-Ramp 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 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 7,492 vehicles a day, roughly 3% of them trucks, projected to reach 10,636 by 2042. The structure is 548 ft (167 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesN5-STATE Col Offra
CrossesChapman AVE-N5 On-Ramp
Location12-ORA-005-35.00-ANA
RouteInterstate 5
Coordinates33.79, -117.88741
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 inspectionJanuary 2024
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length548 ft (167 m)
Longest span200 ft (61 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,492 (2015)
Projected traffic10,636 by 2042
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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-STATE Col Offra over Chapman AVE-N5 On-Ramp built?

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

What condition is N5-STATE Col Offra over Chapman AVE-N5 On-Ramp 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 January 2024.

How much traffic does N5-STATE Col Offra over Chapman AVE-N5 On-Ramp carry?

About 7,492 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is N5-STATE Col Offra over Chapman AVE-N5 On-Ramp?

The structure is 548 ft (167 m) long with a longest span of 200 ft (61 m) and a deck 41 ft wide.

Who owns N5-STATE Col Offra over Chapman AVE-N5 On-Ramp?

It is owned by the State Highway Agency.