US Bridges

Hellyer Avenue over US Highway 101

Fair

Santa Clara County, California · 04-SCL-101-30.10 · Structure no. 37 0217

Built
1965
60 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
277 ft
2 main spans
Daily traffic
1,225
1998 count
Owner
State
State Highway Agency

About this bridge

Hellyer Avenue over US Highway 101 is a prestressed concrete continuous stringer/multi-beam or girder carrying Hellyer Avenue over US Highway 101 in Santa Clara County, California. It was built in 1965, so it is 60 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 1,225 vehicles a day, roughly 1% of them trucks, projected to reach 1,873 by 2043. The structure is 277 ft (84.4 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesHellyer Avenue
CrossesUS Highway 101
Location04-SCL-101-30.10
RouteCounty Highway 0
CountySanta Clara County
StateCalifornia
Coordinates37.28172, -121.80886
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating31.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length277 ft (84.4 m)
Longest span101 ft (30.8 m)
Deck width37 ft (11.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,225 (1998)
Projected traffic1,873 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 Hellyer Avenue over US Highway 101 built?

It was built in 1965, making it 60 years old in 2025.

What condition is Hellyer Avenue over US Highway 101 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 January 2023.

How much traffic does Hellyer Avenue over US Highway 101 carry?

About 1,225 vehicles per day (1998 count), of which roughly 1% are trucks.

How long is Hellyer Avenue over US Highway 101?

The structure is 277 ft (84.4 m) long with a longest span of 101 ft (30.8 m) and a deck 37 ft wide.

Who owns Hellyer Avenue over US Highway 101?

It is owned by the State Highway Agency.