US Bridges

Balboa AVE-S15 on over Murphy Canyon Road

Good

San Diego County, California · 11-SD-015-R9.22-SD · Structure no. 57 0880G

Built
1982
43 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
126 ft
1 main span
Daily traffic
8,200
2020 count
Owner
State
State Highway Agency

About this bridge

Balboa AVE-S15 on over Murphy Canyon Road is a prestressed concrete box beam or girders - multiple carrying Balboa AVE-S15 on over Murphy Canyon Road in San Diego County, California. It was built in 1982, so it is 43 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 8,200 vehicles a day, roughly 2% of them trucks, projected to reach 8,946 by 2041. The structure is 126 ft (38.4 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesBalboa AVE-S15 on
CrossesMurphy Canyon Road
Location11-SD-015-R9.22-SD
RouteInterstate 15
Coordinates32.82236, -117.11894
Functional classUrban Principal Arterial - Interstate

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating42.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length126 ft (38.4 m)
Longest span122 ft (37.2 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,200 (2020)
Projected traffic8,946 by 2041
Trucks2%
Lanes on structure2
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 Balboa AVE-S15 on over Murphy Canyon Road built?

It was built in 1982, making it 43 years old in 2025.

What condition is Balboa AVE-S15 on over Murphy Canyon Road 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 July 2023.

How much traffic does Balboa AVE-S15 on over Murphy Canyon Road carry?

About 8,200 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Balboa AVE-S15 on over Murphy Canyon Road?

The structure is 126 ft (38.4 m) long with a longest span of 122 ft (37.2 m) and a deck 39 ft wide.

Who owns Balboa AVE-S15 on over Murphy Canyon Road?

It is owned by the State Highway Agency.