US Bridges

First Ave over Interstate 5

Good

San Diego County, California · 11-SD-005-R16.59-SD · Structure no. 57 0202

Built
1962
63 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
339 ft
2 main spans
Daily traffic
14,500
2020 count
Owner
State
State Highway Agency

About this bridge

First Ave over Interstate 5 is a prestressed concrete continuous box beam or girders - multiple carrying First Ave over Interstate 5 in San Diego County, California. It was built in 1962, so it is 63 years old, older 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 14,500 vehicles a day, roughly 2% of them trucks, projected to reach 20,608 by 2040. The structure is 339 ft (103.3 m) long and 73 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesFirst Ave
CrossesInterstate 5
Location11-SD-005-R16.59-SD
RouteCity Street 0S226
CountySan Diego County
StateCalifornia
Coordinates32.72303, -117.16377
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length339 ft (103.3 m)
Longest span140 ft (42.7 m)
Deck width73 ft (22.3 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,500 (2020)
Projected traffic20,608 by 2040
Trucks2%
Lanes on structure4
Traffic directionOne-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 First Ave over Interstate 5 built?

It was built in 1962, making it 63 years old in 2025.

What condition is First Ave 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 October 2023.

How much traffic does First Ave over Interstate 5 carry?

About 14,500 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is First Ave over Interstate 5?

The structure is 339 ft (103.3 m) long with a longest span of 140 ft (42.7 m) and a deck 73 ft wide.

Who owns First Ave over Interstate 5?

It is owned by the State Highway Agency.