US Bridges

Highland Avenue over Route 54 & Sweetwater Ri

Fair

San Diego County, California · 11-SD-054-0.89L-NATC · Structure no. 57 0765

Built
1989
36 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
685 ft
6 main spans
Daily traffic
26,800
2020 count
Owner
State
State Highway Agency

About this bridge

Highland Avenue over Route 54 & Sweetwater Ri is a concrete continuous box beam or girders - multiple carrying Highland Avenue over Route 54 & Sweetwater Ri in San Diego County, California. It was built in 1989, so it is 36 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 26,800 vehicles a day, roughly 4% of them trucks, projected to reach 32,200 by 2041. The structure is 685 ft (208.8 m) long and 88 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesHighland Avenue
CrossesRoute 54 & Sweetwater Ri
Location11-SD-054-0.89L-NATC
RouteCity Street 0
CountySan Diego County
StateCalifornia
Coordinates32.65627, -117.09035
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length685 ft (208.8 m)
Longest span120 ft (36.6 m)
Deck width88 ft (26.8 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,800 (2020)
Projected traffic32,200 by 2041
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Highland Avenue over Route 54 & Sweetwater Ri built?

It was built in 1989, making it 36 years old in 2025.

What condition is Highland Avenue over Route 54 & Sweetwater Ri 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 September 2024.

How much traffic does Highland Avenue over Route 54 & Sweetwater Ri carry?

About 26,800 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Highland Avenue over Route 54 & Sweetwater Ri?

The structure is 685 ft (208.8 m) long with a longest span of 120 ft (36.6 m) and a deck 88 ft wide.

Who owns Highland Avenue over Route 54 & Sweetwater Ri?

It is owned by the State Highway Agency.