US Bridges

State Route 17 over Interstate 280 & Ramps

Fair

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

Built
1971
54 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
195 ft
2 main spans
Daily traffic
184,800
2017 count
Owner
State
State Highway Agency

About this bridge

State Route 17 over Interstate 280 & Ramps is a steel continuous stringer/multi-beam or girder carrying State Route 17 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 184,800 vehicles a day, roughly 4% of them trucks, projected to reach 244,840 by 2044. The structure is 195 ft (59.4 m) long and 129 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesState Route 17
CrossesInterstate 280 & Ramps
Location04-SCL-017-13.93-SJS
RouteState Highway 17
CountySanta Clara County
StateCalifornia
Coordinates37.31706, -121.94007
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating34.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length195 ft (59.4 m)
Longest span99 ft (30.2 m)
Deck width129 ft (39.4 m)
Roadway width124 ft (37.8 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic184,800 (2017)
Projected traffic244,840 by 2044
Trucks4%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 State Route 17 over Interstate 280 & Ramps built?

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

What condition is State Route 17 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 State Route 17 over Interstate 280 & Ramps carry?

About 184,800 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is State Route 17 over Interstate 280 & Ramps?

The structure is 195 ft (59.4 m) long with a longest span of 99 ft (30.2 m) and a deck 129 ft wide.

Who owns State Route 17 over Interstate 280 & Ramps?

It is owned by the State Highway Agency.