US Bridges

Interstate 680 over Silver Creek

Good

Santa Clara County, California · 04-SCL-680-M1.13-SJS · Structure no. 37 0320

Built
1974
51 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete Continuous
Length
44 ft
3 main spans
Daily traffic
160,000
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 680 over Silver Creek is a concrete continuous culvert carrying Interstate 680 over Silver Creek in Santa Clara County, California. It was built in 1974, so it is 51 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 160,000 vehicles a day, roughly 2% of them trucks, projected to reach 365,979 by 2045. The structure is 44 ft (13.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 680
CrossesSilver Creek
Location04-SCL-680-M1.13-SJS
RouteInterstate 680
Coordinates37.35119, -121.83784
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length44 ft (13.4 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160,000 (2009)
Projected traffic365,979 by 2045
Trucks2%
Lanes on structure13
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 680 over Silver Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is Interstate 680 over Silver Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Interstate 680 over Silver Creek carry?

About 160,000 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is Interstate 680 over Silver Creek?

The structure is 44 ft (13.4 m) long with a longest span of 14 ft (4.3 m).

Who owns Interstate 680 over Silver Creek?

It is owned by the State Highway Agency.