US Bridges

Bird Avenue over S280-87 I280 87-N280

Fair

Santa Clara County, California · 04-SCL-280-R2.87-SJS · Structure no. 37 0267

Built
1969
56 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
289 ft
2 main spans
Daily traffic
15,300
2002 count
Owner
State
State Highway Agency

About this bridge

Bird Avenue over S280-87 I280 87-N280 is a prestressed concrete continuous box beam or girders - multiple carrying Bird Avenue over S280-87 I280 87-N280 in Santa Clara County, California. It was built in 1969, so it is 56 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 15,300 vehicles a day, roughly 2% of them trucks, projected to reach 24,996 by 2047. The structure is 289 ft (88.1 m) long and 119 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesBird Avenue
CrossesS280-87 I280 87-N280
Location04-SCL-280-R2.87-SJS
RouteCity Street 0C263
CountySanta Clara County
StateCalifornia
Coordinates37.32203, -121.89786
Functional classUrban Minor 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating88.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length289 ft (88.1 m)
Longest span150 ft (45.7 m)
Deck width119 ft (36.3 m)
Roadway width100 ft (30.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,300 (2002)
Projected traffic24,996 by 2047
Trucks2%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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 Bird Avenue over S280-87 I280 87-N280 built?

It was built in 1969, making it 56 years old in 2025.

What condition is Bird Avenue over S280-87 I280 87-N280 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 Bird Avenue over S280-87 I280 87-N280 carry?

About 15,300 vehicles per day (2002 count), of which roughly 2% are trucks.

How long is Bird Avenue over S280-87 I280 87-N280?

The structure is 289 ft (88.1 m) long with a longest span of 150 ft (45.7 m) and a deck 119 ft wide.

Who owns Bird Avenue over S280-87 I280 87-N280?

It is owned by the State Highway Agency.