US Bridges

Interstate 8 over Fairmount Ave

Good

San Diego County, California · 11-SD-008-6.27-SD · Structure no. 57 0349

Built
1958
67 years old, rebuilt 1993
Condition
Good
inspected April 2022
Type
Slab
Concrete Continuous
Length
176 ft
4 main spans
Daily traffic
217,000
2014 count
Owner
State
State Highway Agency

About this bridge

Interstate 8 over Fairmount Ave is a concrete continuous slab carrying Interstate 8 over Fairmount Ave in San Diego County, California. It was built in 1958 and reconstructed in 1993, so it is 67 years old, older 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 217,000 vehicles a day, roughly 4% of them trucks, projected to reach 269,565 by 2039. The structure is 176 ft (53.6 m) long and 199 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesInterstate 8
CrossesFairmount Ave
Location11-SD-008-6.27-SD
RouteInterstate 8
Coordinates32.77877, -117.10139
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 inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length176 ft (53.6 m)
Longest span60 ft (18.3 m)
Deck width199 ft (60.8 m)
Roadway width194 ft (59.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic217,000 (2014)
Projected traffic269,565 by 2039
Trucks4%
Lanes on structure13
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 Interstate 8 over Fairmount Ave built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1993.

What condition is Interstate 8 over Fairmount Ave 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 April 2022.

How much traffic does Interstate 8 over Fairmount Ave carry?

About 217,000 vehicles per day (2014 count), of which roughly 4% are trucks.

How long is Interstate 8 over Fairmount Ave?

The structure is 176 ft (53.6 m) long with a longest span of 60 ft (18.3 m) and a deck 199 ft wide.

Who owns Interstate 8 over Fairmount Ave?

It is owned by the State Highway Agency.