US Bridges

Interstate 680 over SR 237 (calaveras Blvd)

Fair

Santa Clara County, California · 04-SCL-680-M7.63-MPS · Structure no. 37 0302

Built
1971
54 years old, rebuilt 2010
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
188 ft
2 main spans
Daily traffic
137,000
2010 count
Owner
State
State Highway Agency

About this bridge

Interstate 680 over SR 237 (calaveras Blvd) is a concrete continuous box beam or girders - multiple carrying Interstate 680 over SR 237 (calaveras Blvd) in Santa Clara County, California. It was built in 1971 and reconstructed in 2010, 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 137,000 vehicles a day, roughly 6% of them trucks, projected to reach 170,753 by 2043. The structure is 188 ft (57.3 m) long and 241 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesInterstate 680
CrossesSR 237 (calaveras Blvd)
Location04-SCL-680-M7.63-MPS
RouteInterstate 680
Coordinates37.43456, -121.88802
Functional classUrban Principal Arterial - Interstate

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 inspectionJuly 2023
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length188 ft (57.3 m)
Longest span93 ft (28.3 m)
Deck width241 ft (73.5 m)
Roadway width234 ft (71.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic137,000 (2010)
Projected traffic170,753 by 2043
Trucks6%
Lanes on structure10
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 680 over SR 237 (calaveras Blvd) built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2010.

What condition is Interstate 680 over SR 237 (calaveras Blvd) 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 2023.

How much traffic does Interstate 680 over SR 237 (calaveras Blvd) carry?

About 137,000 vehicles per day (2010 count), of which roughly 6% are trucks.

How long is Interstate 680 over SR 237 (calaveras Blvd)?

The structure is 188 ft (57.3 m) long with a longest span of 93 ft (28.3 m) and a deck 241 ft wide.

Who owns Interstate 680 over SR 237 (calaveras Blvd)?

It is owned by the State Highway Agency.