US Bridges

N85-N280 Connector over Interstate 280

Fair

Santa Clara County, California · 04-SCL-085-R18.43-SUNV · Structure no. 37 0226G

Built
1971
54 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
298 ft
2 main spans
Daily traffic
23,500
2004 count
Owner
State
State Highway Agency

About this bridge

N85-N280 Connector over Interstate 280 is a prestressed concrete continuous box beam or girders - multiple carrying N85-N280 Connector over Interstate 280 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 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 23,500 vehicles a day, roughly 2% of them trucks, projected to reach 37,567 by 2044. The structure is 298 ft (90.8 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesN85-N280 Connector
CrossesInterstate 280
Location04-SCL-085-R18.43-SUNV
RouteState Highway 85
CountySanta Clara County
StateCalifornia
Coordinates37.33248, -122.05384
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 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 length298 ft (90.8 m)
Longest span154 ft (46.8 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,500 (2004)
Projected traffic37,567 by 2044
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 N85-N280 Connector over Interstate 280 built?

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

What condition is N85-N280 Connector over Interstate 280 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 June 2024.

How much traffic does N85-N280 Connector over Interstate 280 carry?

About 23,500 vehicles per day (2004 count), of which roughly 2% are trucks.

How long is N85-N280 Connector over Interstate 280?

The structure is 298 ft (90.8 m) long with a longest span of 154 ft (46.8 m) and a deck 44 ft wide.

Who owns N85-N280 Connector over Interstate 280?

It is owned by the State Highway Agency.