US Bridges

NB Interstate 280 over Magdalena Avenue

Fair

Santa Clara County, California · 04-SCL-280-14.10 · Structure no. 37 0225R

Built
1967
58 years old
Condition
Fair
inspected February 2022
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
137 ft
2 main spans
Daily traffic
58,500
2009 count
Owner
State
State Highway Agency

About this bridge

NB Interstate 280 over Magdalena Avenue is a concrete continuous box beam or girders - multiple carrying NB Interstate 280 over Magdalena Avenue in Santa Clara County, California. It was built in 1967, so it is 58 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 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 58,500 vehicles a day, roughly 2% of them trucks, projected to reach 81,506 by 2044. The structure is 137 ft (41.8 m) long and 70 ft wide.

Location

Open in Google Maps
CarriesNB Interstate 280
CrossesMagdalena Avenue
Location04-SCL-280-14.10
RouteInterstate 280
CountySanta Clara County
StateCalifornia
Coordinates37.3529, -122.10693
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.
Last inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating76.1 US tons
Inventory rating45.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length137 ft (41.8 m)
Longest span71 ft (21.6 m)
Deck width70 ft (21.2 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,500 (2009)
Projected traffic81,506 by 2044
Trucks2%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 NB Interstate 280 over Magdalena Avenue built?

It was built in 1967, making it 58 years old in 2025.

What condition is NB Interstate 280 over Magdalena Avenue 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 2022.

How much traffic does NB Interstate 280 over Magdalena Avenue carry?

About 58,500 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is NB Interstate 280 over Magdalena Avenue?

The structure is 137 ft (41.8 m) long with a longest span of 71 ft (21.6 m) and a deck 70 ft wide.

Who owns NB Interstate 280 over Magdalena Avenue?

It is owned by the State Highway Agency.