US Bridges

Palm Avenue over Interstate 805

Fair

San Diego County, California · 11-SD-805-2.90-SD · Structure no. 57 0775

Built
1975
50 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
326 ft
2 main spans
Daily traffic
28,566
2020 count
Owner
State
State Highway Agency

About this bridge

Palm Avenue over Interstate 805 is a prestressed concrete continuous box beam or girders - multiple carrying Palm Avenue over Interstate 805 in San Diego County, California. It was built in 1975, so it is 50 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 28,566 vehicles a day, roughly 2% of them trucks, projected to reach 36,000 by 2042. The structure is 326 ft (99.4 m) long and 94 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesPalm Avenue
CrossesInterstate 805
Location11-SD-805-2.90-SD
RouteCity Street 0S158
CountySan Diego County
StateCalifornia
Coordinates32.58365, -117.03754
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 inspectionMay 2024
Inspection intervalevery 24 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 rating45.3 US tons
Inventory rating34.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length326 ft (99.4 m)
Longest span166 ft (50.6 m)
Deck width94 ft (28.7 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,566 (2020)
Projected traffic36,000 by 2042
Trucks2%
Lanes on structure6
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 Palm Avenue over Interstate 805 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Palm Avenue over Interstate 805 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 May 2024.

How much traffic does Palm Avenue over Interstate 805 carry?

About 28,566 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Palm Avenue over Interstate 805?

The structure is 326 ft (99.4 m) long with a longest span of 166 ft (50.6 m) and a deck 94 ft wide.

Who owns Palm Avenue over Interstate 805?

It is owned by the State Highway Agency.