US Bridges

1st ST over Interstate 5

Good

Orange County, California · 12-ORA-005-30.90-SA · Structure no. 55 0646

Built
1995
30 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
279 ft
2 main spans
Daily traffic
37,000
2017 count
Owner
State
State Highway Agency

About this bridge

1st ST over Interstate 5 is a prestressed concrete continuous box beam or girders - multiple carrying 1st 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 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 37,000 vehicles a day, roughly 3% of them trucks, projected to reach 39,676 by 2043. The structure is 279 ft (85 m) long and 102 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries1st ST
CrossesInterstate 5
Location12-ORA-005-30.90-SA
RouteCity Street 0M018
CountyOrange County
StateCalifornia
Coordinates33.74548, -117.84274
Functional classUrban Minor Arterial

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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating36.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length279 ft (85 m)
Longest span144 ft (43.9 m)
Deck width102 ft (31.1 m)
Roadway width90 ft (27.4 m)
Vertical clearance over deck19 ft (5.9 m)

Traffic and service

Average daily traffic37,000 (2017)
Projected traffic39,676 by 2043
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 1st ST over Interstate 5 built?

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

What condition is 1st ST 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 1st ST over Interstate 5 carry?

About 37,000 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is 1st ST over Interstate 5?

The structure is 279 ft (85 m) long with a longest span of 144 ft (43.9 m) and a deck 102 ft wide.

Who owns 1st ST over Interstate 5?

It is owned by the State Highway Agency.