US Bridges

N15 HOV-N15&W56 CO over Interstate 15 NB

Fair

San Diego County, California · 11-SD-015-M19.03 · Structure no. 57 0944G

Built
1986
39 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
418 ft
3 main spans
Daily traffic
5,800
2020 count
Owner
State
State Highway Agency

About this bridge

N15 HOV-N15&W56 CO over Interstate 15 NB is a prestressed concrete continuous box beam or girders - multiple carrying N15 HOV-N15&W56 CO over Interstate 15 NB in San Diego County, California. It was built in 1986, so it is 39 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 5,800 vehicles a day, roughly 2% of them trucks, projected to reach 7,857 by 2041. The structure is 418 ft (127.4 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesN15 HOV-N15&W56 CO
CrossesInterstate 15 NB
Location11-SD-015-M19.03
RouteInterstate 15
CountySan Diego County
StateCalifornia
Coordinates32.9586, -117.0992
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 inspectionSeptember 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 alignment6: Equal to present minimum criteria
Operating rating91.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length418 ft (127.4 m)
Longest span175 ft (53.3 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,800 (2020)
Projected traffic7,857 by 2041
Trucks2%
Lanes on structure1
Traffic directionOne-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 N15 HOV-N15&W56 CO over Interstate 15 NB built?

It was built in 1986, making it 39 years old in 2025.

What condition is N15 HOV-N15&W56 CO over Interstate 15 NB 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 September 2023.

How much traffic does N15 HOV-N15&W56 CO over Interstate 15 NB carry?

About 5,800 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is N15 HOV-N15&W56 CO over Interstate 15 NB?

The structure is 418 ft (127.4 m) long with a longest span of 175 ft (53.3 m) and a deck 39 ft wide.

Who owns N15 HOV-N15&W56 CO over Interstate 15 NB?

It is owned by the State Highway Agency.