US Bridges

Chinquapin Ave over Interstate 5

Good

San Diego County, California · 11-SD-005-R49.12-CBD · Structure no. 57 0672

Built
1970
55 years old
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
287 ft
2 main spans
Daily traffic
8,400
2020 count
Owner
State
State Highway Agency

About this bridge

Chinquapin Ave over Interstate 5 is a prestressed concrete continuous box beam or girders - multiple carrying Chinquapin Ave over Interstate 5 in San Diego County, California. It was built in 1970, so it is 55 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 8,400 vehicles a day, roughly 2% of them trucks, projected to reach 15,011 by 2045. The structure is 287 ft (87.5 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesChinquapin Ave
CrossesInterstate 5
Location11-SD-005-R49.12-CBD
RouteCounty Highway 0
Coordinates33.14994, -117.3356
Functional classUrban Minor Arterial

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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating30.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length287 ft (87.5 m)
Longest span160 ft (48.8 m)
Deck width37 ft (11.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,400 (2020)
Projected traffic15,011 by 2045
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 Chinquapin Ave over Interstate 5 built?

It was built in 1970, making it 55 years old in 2025.

What condition is Chinquapin 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 March 2024.

How much traffic does Chinquapin Ave over Interstate 5 carry?

About 8,400 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Chinquapin Ave over Interstate 5?

The structure is 287 ft (87.5 m) long with a longest span of 160 ft (48.8 m) and a deck 37 ft wide.

Who owns Chinquapin Ave over Interstate 5?

It is owned by the State Highway Agency.