US Bridges

Island Ave over Interstate 5

Good

San Diego County, California · 11-SD-005-R14.81-SD · Structure no. 57 0452

Built
1963
62 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
258 ft
4 main spans
Daily traffic
2,400
2020 count
Owner
State
State Highway Agency

About this bridge

Island Ave over Interstate 5 is a concrete continuous box beam or girders - multiple carrying Island Ave over Interstate 5 in San Diego County, California. It was built in 1963, so it is 62 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 2,400 vehicles a day, roughly 2% of them trucks, projected to reach 3,710 by 2040. The structure is 258 ft (78.6 m) long and 74 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIsland Ave
CrossesInterstate 5
Location11-SD-005-R14.81-SD
RouteCity Street 0
Coordinates32.71037, -117.14802
Functional classUrban Local

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 inspectionMay 2023
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 rating45.3 US tons
Inventory rating35.1 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length258 ft (78.6 m)
Longest span80 ft (24.4 m)
Deck width74 ft (22.6 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2020)
Projected traffic3,710 by 2040
Trucks2%
Lanes on structure2
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 Island Ave over Interstate 5 built?

It was built in 1963, making it 62 years old in 2025.

What condition is Island 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 May 2023.

How much traffic does Island Ave over Interstate 5 carry?

About 2,400 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Island Ave over Interstate 5?

The structure is 258 ft (78.6 m) long with a longest span of 80 ft (24.4 m) and a deck 74 ft wide.

Who owns Island Ave over Interstate 5?

It is owned by the State Highway Agency.