US Bridges

Main ST over I 5 MAIN-N5 on N5 Off

Fair

Orange County, California · 12-ORA-005-33.09-SA · Structure no. 55 0674

Built
1996
29 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
873 ft
5 main spans
Daily traffic
22,000
2018 count
Owner
State
State Highway Agency

About this bridge

Main ST over I 5 MAIN-N5 on N5 Off is a prestressed concrete continuous box beam or girders - multiple carrying Main ST over I 5 MAIN-N5 on N5 Off 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 fair condition with a lowest component rating of 6 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 22,000 vehicles a day, roughly 3% of them trucks, projected to reach 23,750 by 2040. The structure is 873 ft (266.1 m) long and 124 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMain ST
CrossesI 5 MAIN-N5 on N5 Off
Location12-ORA-005-33.09-SA
RouteCity Street 0
CountyOrange County
StateCalifornia
Coordinates33.76644, -117.86719
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
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 spans5
Design loadHS 20 + Mod
Structure length873 ft (266.1 m)
Longest span227 ft (69.1 m)
Deck width124 ft (37.8 m)
Roadway width106 ft (32.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,000 (2018)
Projected traffic23,750 by 2040
Trucks3%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Main ST over I 5 MAIN-N5 on N5 Off built?

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

What condition is Main ST over I 5 MAIN-N5 on N5 Off 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 August 2023.

How much traffic does Main ST over I 5 MAIN-N5 on N5 Off carry?

About 22,000 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is Main ST over I 5 MAIN-N5 on N5 Off?

The structure is 873 ft (266.1 m) long with a longest span of 227 ft (69.1 m) and a deck 124 ft wide.

Who owns Main ST over I 5 MAIN-N5 on N5 Off?

It is owned by the State Highway Agency.