US Bridges

Interstate 5 over I 15 S15-MAIN Off S5-N15

Fair

San Diego County, California · 11-SD-005-R12.63-SD · Structure no. 57 0438

Built
1963
62 years old, rebuilt 1978
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
235 ft
4 main spans
Daily traffic
164,000
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over I 15 S15-MAIN Off S5-N15 is a concrete continuous box beam or girders - multiple carrying Interstate 5 over I 15 S15-MAIN Off S5-N15 in San Diego County, California. It was built in 1963 and reconstructed in 1978, 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 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 164,000 vehicles a day, roughly 5% of them trucks, projected to reach 234,932 by 2040. The structure is 235 ft (71.6 m) long and 177 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesInterstate 5
CrossesI 15 S15-MAIN Off S5-N15
Location11-SD-005-R12.63-SD
RouteInterstate 5
CountySan Diego County
StateCalifornia
Coordinates32.69294, -117.12142
Functional classUrban Principal Arterial - Interstate

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 inspectionApril 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 rating87.9 US tons
Inventory rating52.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length235 ft (71.6 m)
Longest span90 ft (27.4 m)
Deck width177 ft (54.1 m)
Roadway width173 ft (52.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic164,000 (2020)
Projected traffic234,932 by 2040
Trucks5%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Interstate 5 over I 15 S15-MAIN Off S5-N15 built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1978.

What condition is Interstate 5 over I 15 S15-MAIN Off S5-N15 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 April 2023.

How much traffic does Interstate 5 over I 15 S15-MAIN Off S5-N15 carry?

About 164,000 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Interstate 5 over I 15 S15-MAIN Off S5-N15?

The structure is 235 ft (71.6 m) long with a longest span of 90 ft (27.4 m) and a deck 177 ft wide.

Who owns Interstate 5 over I 15 S15-MAIN Off S5-N15?

It is owned by the State Highway Agency.