US Bridges

S17-S280 Connector over Interstate 280 & Ramps

Fair

Santa Clara County, California · 04-SCL-017-13.93-SJS · Structure no. 37 0131F

Built
1971
54 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
194 ft
2 main spans
Daily traffic
24,400
2011 count
Owner
State
State Highway Agency

About this bridge

S17-S280 Connector over Interstate 280 & Ramps is a steel continuous stringer/multi-beam or girder carrying S17-S280 Connector over Interstate 280 & Ramps 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 24,400 vehicles a day, roughly 2% of them trucks, projected to reach 32,339 by 2044. The structure is 194 ft (59.1 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesS17-S280 Connector
CrossesInterstate 280 & Ramps
Location04-SCL-017-13.93-SJS
RouteState Highway 17
CountySanta Clara County
StateCalifornia
Coordinates37.31706, -121.94067
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length194 ft (59.1 m)
Longest span101 ft (30.7 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deck17 ft (5.3 m)

Traffic and service

Average daily traffic24,400 (2011)
Projected traffic32,339 by 2044
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 S17-S280 Connector over Interstate 280 & Ramps built?

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

What condition is S17-S280 Connector over Interstate 280 & Ramps 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 July 2024.

How much traffic does S17-S280 Connector over Interstate 280 & Ramps carry?

About 24,400 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is S17-S280 Connector over Interstate 280 & Ramps?

The structure is 194 ft (59.1 m) long with a longest span of 101 ft (30.7 m) and a deck 34 ft wide.

Who owns S17-S280 Connector over Interstate 280 & Ramps?

It is owned by the State Highway Agency.