US Bridges

N5-N15 Connector over I 15 NB National Creek

Fair

San Diego County, California · 11-SD-005-R12.39-SD · Structure no. 57 0735G

Built
1978
47 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
2,319 ft
6 main spans
Daily traffic
24,200
2020 count
Owner
State
State Highway Agency

About this bridge

N5-N15 Connector over I 15 NB National Creek is a prestressed concrete continuous box beam or girders - multiple carrying N5-N15 Connector over I 15 NB National Creek in San Diego County, California. It was built in 1978, so it is 47 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 24,200 vehicles a day, roughly 1% of them trucks, projected to reach 37,403 by 2040. The structure is 2,319 ft (706.8 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN5-N15 Connector
CrossesI 15 NB National Creek
Location11-SD-005-R12.39-SD
RouteInterstate 5
CountySan Diego County
StateCalifornia
Coordinates32.69061, -117.11774
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.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6 (+10 approach)
Design loadHS 20 + Mod
Structure length2,319 ft (706.8 m)
Longest span210 ft (64 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,200 (2020)
Projected traffic37,403 by 2040
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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 N5-N15 Connector over I 15 NB National Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is N5-N15 Connector over I 15 NB National Creek 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 N5-N15 Connector over I 15 NB National Creek carry?

About 24,200 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is N5-N15 Connector over I 15 NB National Creek?

The structure is 2,319 ft (706.8 m) long with a longest span of 210 ft (64 m) and a deck 42 ft wide.

Who owns N5-N15 Connector over I 15 NB National Creek?

It is owned by the State Highway Agency.