US Bridges

Garnet Ave over Rose Canyon Creek

Fair

San Diego County, California · 0.2 MI W/O Mission Bay DR · Structure no. 57C0312

Built
1939
86 years old, rebuilt 1962
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
181 ft
6 main spans
Daily traffic
58,500
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Garnet Ave over Rose Canyon Creek is a concrete continuous tee beam carrying Garnet Ave over Rose Canyon Creek in San Diego County, California. It was built in 1939 and reconstructed in 1962, so it is 86 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 58,500 vehicles a day, roughly 2% of them trucks, projected to reach 75,317 by 2045. The structure is 181 ft (55.2 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesGarnet Ave
CrossesRose Canyon Creek
Location0.2 MI W/O Mission Bay DR
RouteCity Street 0
CountySan Diego County
StateCalifornia
Coordinates32.80512, -117.22288
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.6 US tons
Inventory rating24.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6 (+6 approach)
Design loadH 15
Structure length181 ft (55.2 m)
Longest span30 ft (9.1 m)
Deck width80 ft (24.4 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,500 (2023)
Projected traffic75,317 by 2045
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Garnet Ave over Rose Canyon Creek built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1962.

What condition is Garnet Ave over Rose Canyon 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 August 2023.

How much traffic does Garnet Ave over Rose Canyon Creek carry?

About 58,500 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Garnet Ave over Rose Canyon Creek?

The structure is 181 ft (55.2 m) long with a longest span of 30 ft (9.1 m) and a deck 80 ft wide.

Who owns Garnet Ave over Rose Canyon Creek?

It is owned by the City or Municipal Highway Agency.