US Bridges

4th ST over Interstate 5

Fair

Orange County, California · 12-ORA-005-31.09-SA · Structure no. 55 0649

Built
1995
30 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
226 ft
2 main spans
Daily traffic
28,000
2017 count
Owner
State
State Highway Agency

About this bridge

4th ST over Interstate 5 is a prestressed concrete continuous box beam or girders - multiple carrying 4th ST over Interstate 5 in Orange County, California. It was built in 1995, so it is 30 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 28,000 vehicles a day, roughly 3% of them trucks, projected to reach 30,309 by 2043. The structure is 226 ft (68.9 m) long and 102 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries4th ST
CrossesInterstate 5
Location12-ORA-005-31.09-SA
RouteCity Street 0M022
CountyOrange County
StateCalifornia
Coordinates33.74798, -117.84359
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
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than 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 rating66 US tons
Inventory rating42.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length226 ft (68.9 m)
Longest span122 ft (37.2 m)
Deck width102 ft (31.1 m)
Roadway width90 ft (27.4 m)
Vertical clearance over deck21 ft (6.5 m)

Traffic and service

Average daily traffic28,000 (2017)
Projected traffic30,309 by 2043
Trucks3%
Lanes on structure7
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 4th ST over Interstate 5 built?

It was built in 1995, making it 30 years old in 2025.

What condition is 4th ST 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 August 2023.

How much traffic does 4th ST over Interstate 5 carry?

About 28,000 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is 4th ST over Interstate 5?

The structure is 226 ft (68.9 m) long with a longest span of 122 ft (37.2 m) and a deck 102 ft wide.

Who owns 4th ST over Interstate 5?

It is owned by the State Highway Agency.