US Bridges

N5-B ST Off Ramp over C Street

Fair

San Diego County, California · 11-SD-005-R15.24-SD · Structure no. 57 0425S

Built
1962
63 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
71 ft
1 main span
Daily traffic
4,600
2020 count
Owner
State
State Highway Agency

About this bridge

N5-B ST Off Ramp over C Street is a concrete box beam or girders - multiple carrying N5-B ST Off Ramp over C Street 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 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 4,600 vehicles a day, roughly 2% of them trucks, projected to reach 6,182 by 2040. The structure is 71 ft (21.6 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN5-B ST Off Ramp
CrossesC Street
Location11-SD-005-R15.24-SD
RouteInterstate 5
CountySan Diego County
StateCalifornia
Coordinates32.71673, -117.14717
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating39.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length71 ft (21.6 m)
Longest span68 ft (20.7 m)
Deck width26 ft (7.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,600 (2020)
Projected traffic6,182 by 2040
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
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 N5-B ST Off Ramp over C Street built?

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

What condition is N5-B ST Off Ramp over C Street 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 June 2023.

How much traffic does N5-B ST Off Ramp over C Street carry?

About 4,600 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is N5-B ST Off Ramp over C Street?

The structure is 71 ft (21.6 m) long with a longest span of 68 ft (20.7 m) and a deck 26 ft wide.

Who owns N5-B ST Off Ramp over C Street?

It is owned by the State Highway Agency.