US Bridges

College Ave over Interstate 8

Good

San Diego County, California · 11-SD-008-8.34-SD · Structure no. 57 0367

Built
1960
65 years old, rebuilt 1970
Condition
Good
inspected April 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
317 ft
4 main spans
Daily traffic
28,740
2014 count
Owner
State
State Highway Agency

About this bridge

College Ave over Interstate 8 is a concrete continuous box beam or girders - multiple carrying College Ave over Interstate 8 in San Diego County, California. It was built in 1960 and reconstructed in 1970, 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 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 28,740 vehicles a day, roughly 4% of them trucks, projected to reach 35,944 by 2042. The structure is 317 ft (96.6 m) long and 64 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCollege Ave
CrossesInterstate 8
Location11-SD-008-8.34-SD
RouteCity Street 0S138
Coordinates32.7798, -117.06622
Functional classUrban Other Principal Arterial

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 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment9: Superior to present desirable criteria
Operating rating85.8 US tons
Inventory rating51.5 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length317 ft (96.6 m)
Longest span84 ft (25.6 m)
Deck width64 ft (19.6 m)
Roadway width55 ft (16.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,740 (2014)
Projected traffic35,944 by 2042
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 College Ave over Interstate 8 built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1970.

What condition is College Ave over Interstate 8 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 2024.

How much traffic does College Ave over Interstate 8 carry?

About 28,740 vehicles per day (2014 count), of which roughly 4% are trucks.

How long is College Ave over Interstate 8?

The structure is 317 ft (96.6 m) long with a longest span of 84 ft (25.6 m) and a deck 64 ft wide.

Who owns College Ave over Interstate 8?

It is owned by the State Highway Agency.