US Bridges

Interstate 805 over Plaza Blvd

Fair

San Diego County, California · 11-SD-805-10.28-NATC · Structure no. 57 0643

Built
1975
50 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
152 ft
1 main span
Daily traffic
204,000
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 805 over Plaza Blvd is a prestressed concrete box beam or girders - multiple carrying Interstate 805 over Plaza Blvd 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 204,000 vehicles a day, roughly 6% of them trucks, projected to reach 308,000 by 2042. The structure is 152 ft (46.3 m) long and 172 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesInterstate 805
CrossesPlaza Blvd
Location11-SD-805-10.28-NATC
RouteInterstate 805
CountySan Diego County
StateCalifornia
Coordinates32.67722, -117.08461
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating38.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length152 ft (46.3 m)
Longest span152 ft (46.3 m)
Deck width172 ft (52.4 m)
Roadway width168 ft (51.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic204,000 (2020)
Projected traffic308,000 by 2042
Trucks6%
Lanes on structure12
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 805 over Plaza Blvd built?

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

What condition is Interstate 805 over Plaza Blvd 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 July 2024.

How much traffic does Interstate 805 over Plaza Blvd carry?

About 204,000 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Interstate 805 over Plaza Blvd?

The structure is 152 ft (46.3 m) long with a longest span of 152 ft (46.3 m) and a deck 172 ft wide.

Who owns Interstate 805 over Plaza Blvd?

It is owned by the State Highway Agency.