US Bridges

S85-S280 Connector over Interstate 280

Fair

Santa Clara County, California · 04-SCL-085-R18.49-CPO · Structure no. 37 0228F

Built
1967
58 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
358 ft
4 main spans
Daily traffic
18,500
2004 count
Owner
State
State Highway Agency

About this bridge

S85-S280 Connector over Interstate 280 is a concrete continuous box beam or girders - multiple carrying S85-S280 Connector over Interstate 280 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 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 18,500 vehicles a day, roughly 2% of them trucks, projected to reach 29,629 by 2044. The structure is 358 ft (109.1 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesS85-S280 Connector
CrossesInterstate 280
Location04-SCL-085-R18.49-CPO
RouteState Highway 85
CountySanta Clara County
StateCalifornia
Coordinates37.33193, -122.05695
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating78.9 US tons
Inventory rating47.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length358 ft (109.1 m)
Longest span116 ft (35.4 m)
Deck width41 ft (12.4 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,500 (2004)
Projected traffic29,629 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 S85-S280 Connector over Interstate 280 built?

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

What condition is S85-S280 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 S85-S280 Connector over Interstate 280 carry?

About 18,500 vehicles per day (2004 count), of which roughly 2% are trucks.

How long is S85-S280 Connector over Interstate 280?

The structure is 358 ft (109.1 m) long with a longest span of 116 ft (35.4 m) and a deck 41 ft wide.

Who owns S85-S280 Connector over Interstate 280?

It is owned by the State Highway Agency.