US Bridges

Carlton Hill Blvd over San Diego River

Fair

San Diego County, California · 0.2MI N/O Mission Gorge · Structure no. 57C0523

Built
1978
47 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
500 ft
12 main spans
Daily traffic
23,227
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Carlton Hill Blvd over San Diego River is a concrete continuous slab carrying Carlton Hill Blvd over San Diego River in San Diego County, California. It was built in 1978, so it is 47 years old, younger 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 23,227 vehicles a day, roughly 1% of them trucks, projected to reach 25,090 by 2041. The structure is 500 ft (152.4 m) long and 76 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCarlton Hill Blvd
CrossesSan Diego River
Location0.2MI N/O Mission Gorge
RouteCity Street 0
Coordinates32.84259, -116.99705
Functional classUrban Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating51 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans12
Design loadUnknown
Structure length500 ft (152.4 m)
Longest span41 ft (12.5 m)
Deck width76 ft (23.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,227 (2016)
Projected traffic25,090 by 2041
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 Carlton Hill Blvd over San Diego River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Carlton Hill Blvd over San Diego River 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 March 2024.

How much traffic does Carlton Hill Blvd over San Diego River carry?

About 23,227 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Carlton Hill Blvd over San Diego River?

The structure is 500 ft (152.4 m) long with a longest span of 41 ft (12.5 m) and a deck 76 ft wide.

Who owns Carlton Hill Blvd over San Diego River?

It is owned by the City or Municipal Highway Agency.