US Bridges

Interstate 5 over Gilman Drive

Fair

San Diego County, California · 11-SD-005-R26.79-SD · Structure no. 57 0524R

Built
1966
59 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
163 ft
3 main spans
Daily traffic
88,000
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Gilman Drive is a concrete continuous box beam or girders - multiple carrying Interstate 5 over Gilman Drive in San Diego County, California. It was built in 1966, so it is 59 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 88,000 vehicles a day, roughly 4% of them trucks, projected to reach 111,797 by 2047. The structure is 163 ft (49.7 m) long and 68 ft wide.

CarriesInterstate 5
CrossesGilman Drive
Location11-SD-005-R26.79-SD
RouteInterstate 5
Coordinates32.84921, -117.23506
Functional classUrban Principal Arterial - Interstate

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 inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.2 US tons
Inventory rating41.1 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length163 ft (49.7 m)
Longest span86 ft (26.2 m)
Deck width68 ft (20.7 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic88,000 (2020)
Projected traffic111,797 by 2047
Trucks4%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 5 over Gilman Drive built?

It was built in 1966, making it 59 years old in 2025.

What condition is Interstate 5 over Gilman 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 February 2025.

How much traffic does Interstate 5 over Gilman Drive carry?

About 88,000 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Interstate 5 over Gilman Drive?

The structure is 163 ft (49.7 m) long with a longest span of 86 ft (26.2 m) and a deck 68 ft wide.

Who owns Interstate 5 over Gilman Drive?

It is owned by the State Highway Agency.