US Bridges

N&s I280 - N&s 87 over I 280 & SR 87 ST & Rmps

Fair

Santa Clara County, California · 04-SCL-280-R2.50-SJS · Structure no. 37 0270H

Built
1971
54 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
2,038 ft
41 main spans
Daily traffic
41,400
1998 count
Owner
State
State Highway Agency

About this bridge

N&s I280 - N&s 87 over I 280 & SR 87 ST & Rmps is a concrete continuous box beam or girders - multiple carrying N&s I280 - N&s 87 over I 280 & SR 87 ST & Rmps 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 41,400 vehicles a day, roughly 2% of them trucks, projected to reach 65,422 by 2045. The structure is 2,038 ft (621.2 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN&s I280 - N&s 87
CrossesI 280 & SR 87 ST & Rmps
Location04-SCL-280-R2.50-SJS
RouteInterstate 280
CountySanta Clara County
StateCalifornia
Coordinates37.32496, -121.88993
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans41
Design loadHS 20 + Mod
Structure length2,038 ft (621.2 m)
Longest span160 ft (48.8 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,400 (1998)
Projected traffic65,422 by 2045
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesFourth level (interchange)
CrossesHighway, waterway and railroad
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 N&s I280 - N&s 87 over I 280 & SR 87 ST & Rmps built?

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

What condition is N&s I280 - N&s 87 over I 280 & SR 87 ST & Rmps 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 N&s I280 - N&s 87 over I 280 & SR 87 ST & Rmps carry?

About 41,400 vehicles per day (1998 count), of which roughly 2% are trucks.

How long is N&s I280 - N&s 87 over I 280 & SR 87 ST & Rmps?

The structure is 2,038 ft (621.2 m) long with a longest span of 160 ft (48.8 m) and a deck 41 ft wide.

Who owns N&s I280 - N&s 87 over I 280 & SR 87 ST & Rmps?

It is owned by the State Highway Agency.