US Bridges

Balboa Ave over State Route 163

Good

San Diego County, California · 11-SD-163-8.01-SD · Structure no. 57 0858

Built
1975
50 years old
Condition
Good
inspected January 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
358 ft
2 main spans
Daily traffic
43,300
2016 count
Owner
State
State Highway Agency

About this bridge

Balboa Ave over State Route 163 is a prestressed concrete continuous box beam or girders - multiple carrying Balboa Ave over State Route 163 in San Diego County, California. It was built in 1975, so it is 50 years old, younger 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 43,300 vehicles a day, roughly 2% of them trucks, projected to reach 53,798 by 2043. The structure is 358 ft (109.1 m) long and 146 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesBalboa Ave
CrossesState Route 163
Location11-SD-163-8.01-SD
RouteCity Street 0
Coordinates32.82164, -117.14737
Functional classUrban Local

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 inspectionJanuary 2023
Inspection intervalevery 48 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 rating65.4 US tons
Inventory rating44.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length358 ft (109.1 m)
Longest span183 ft (55.9 m)
Deck width146 ft (44.5 m)
Roadway width134 ft (40.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,300 (2016)
Projected traffic53,798 by 2043
Trucks2%
Lanes on structure8
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 Balboa Ave over State Route 163 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Balboa Ave over State Route 163 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 January 2023.

How much traffic does Balboa Ave over State Route 163 carry?

About 43,300 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Balboa Ave over State Route 163?

The structure is 358 ft (109.1 m) long with a longest span of 183 ft (55.9 m) and a deck 146 ft wide.

Who owns Balboa Ave over State Route 163?

It is owned by the State Highway Agency.