US Bridges

SB Interstate 280 over SR 87 Cons Guadalupe Sts

Fair

Santa Clara County, California · 04-SCL-280-R2.19-SJS · Structure no. 37 0275L

Built
1971
54 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
2,501 ft
26 main spans
Daily traffic
111,250
2019 count
Owner
State
State Highway Agency

About this bridge

SB Interstate 280 over SR 87 Cons Guadalupe Sts is a concrete continuous box beam or girders - multiple carrying SB Interstate 280 over SR 87 Cons Guadalupe Sts in Santa Clara County, California. It was built in 1971, so it is 54 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 6 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 111,250 vehicles a day, roughly 3% of them trucks, projected to reach 153,208 by 2045. The structure is 2,501 ft (762.3 m) long and 68 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSB Interstate 280
CrossesSR 87 Cons Guadalupe Sts
Location04-SCL-280-R2.19-SJS
RouteInterstate 280
Coordinates37.32498, -121.88648
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.6 US tons
Inventory rating41.4 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans26
Design loadHS 20 + Mod
Structure length2,501 ft (762.3 m)
Longest span108 ft (32.8 m)
Deck width68 ft (20.7 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic111,250 (2019)
Projected traffic153,208 by 2045
Trucks3%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SB Interstate 280 over SR 87 Cons Guadalupe Sts built?

It was built in 1971, making it 54 years old in 2025.

What condition is SB Interstate 280 over SR 87 Cons Guadalupe Sts 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 January 2025.

How much traffic does SB Interstate 280 over SR 87 Cons Guadalupe Sts carry?

About 111,250 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is SB Interstate 280 over SR 87 Cons Guadalupe Sts?

The structure is 2,501 ft (762.3 m) long with a longest span of 108 ft (32.8 m) and a deck 68 ft wide.

Who owns SB Interstate 280 over SR 87 Cons Guadalupe Sts?

It is owned by the State Highway Agency.