US Bridges

I280-N87 & N87-OFF over City Strs & Guadalupe Rv

Fair

Santa Clara County, California · 04-SCL-280-R2.54-SJS · Structure no. 37 0410H

Built
1988
37 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
1,788 ft
11 main spans
Daily traffic
14,500
1998 count
Owner
State
State Highway Agency

About this bridge

I280-N87 & N87-OFF over City Strs & Guadalupe Rv is a prestressed concrete continuous box beam or girders - multiple carrying I280-N87 & N87-OFF over City Strs & Guadalupe Rv in Santa Clara County, California. It was built in 1988, so it is 37 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 14,500 vehicles a day, roughly 2% of them trucks, projected to reach 27,260 by 2045. The structure is 1,788 ft (545.1 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI280-N87 & N87-OFF
CrossesCity Strs & Guadalupe Rv
Location04-SCL-280-R2.54-SJS
RouteInterstate 280
CountySanta Clara County
StateCalifornia
Coordinates37.32881, -121.89498
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20 + Mod
Structure length1,788 ft (545.1 m)
Longest span188 ft (57.3 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,500 (1998)
Projected traffic27,260 by 2045
Trucks2%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I280-N87 & N87-OFF over City Strs & Guadalupe Rv built?

It was built in 1988, making it 37 years old in 2025.

What condition is I280-N87 & N87-OFF over City Strs & Guadalupe Rv 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 I280-N87 & N87-OFF over City Strs & Guadalupe Rv carry?

About 14,500 vehicles per day (1998 count), of which roughly 2% are trucks.

How long is I280-N87 & N87-OFF over City Strs & Guadalupe Rv?

The structure is 1,788 ft (545.1 m) long with a longest span of 188 ft (57.3 m) and a deck 42 ft wide.

Who owns I280-N87 & N87-OFF over City Strs & Guadalupe Rv?

It is owned by the State Highway Agency.