US Bridges

Fairmount Ave over Aldine Drive

Fair

San Diego County, California · 1.2 MI S/O RTE I-8 · Structure no. 57C0420L

Built
1960
65 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
188 ft
3 main spans
Daily traffic
18,780
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Fairmount Ave over Aldine Drive is a concrete continuous box beam or girders - multiple carrying Fairmount Ave over Aldine Drive in San Diego County, California. It was built in 1960, so it is 65 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 18,780 vehicles a day, roughly 1% of them trucks, projected to reach 20,000 by 2045. The structure is 188 ft (57.3 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesFairmount Ave
CrossesAldine Drive
Location1.2 MI S/O RTE I-8
RouteCity Street 0
CountySan Diego County
StateCalifornia
Coordinates32.76248, -117.09765
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating47.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length188 ft (57.3 m)
Longest span87 ft (26.5 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,780 (2023)
Projected traffic20,000 by 2045
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Fairmount Ave over Aldine Drive built?

It was built in 1960, making it 65 years old in 2025.

What condition is Fairmount Ave over Aldine Drive 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 Fairmount Ave over Aldine Drive carry?

About 18,780 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Fairmount Ave over Aldine Drive?

The structure is 188 ft (57.3 m) long with a longest span of 87 ft (26.5 m) and a deck 33 ft wide.

Who owns Fairmount Ave over Aldine Drive?

It is owned by the City or Municipal Highway Agency.