US Bridges

Hellyer Ave over Coyote Creek

Fair

Santa Clara County, California · 0.01 MI E Palisade DR · Structure no. 37C0541

Built
1930
95 years old, rebuilt 1996
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete Continuous
Length
215 ft
4 main spans
Daily traffic
9,275
2010 count
Owner
County
County Highway Agency

About this bridge

Hellyer Ave over Coyote Creek is a concrete continuous tee beam carrying Hellyer Ave over Coyote Creek in Santa Clara County, California. It was built in 1930 and reconstructed in 1996, so it is 95 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 9,275 vehicles a day, roughly 5% of them trucks, projected to reach 11,069 by 2042. The structure is 215 ft (65.5 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesHellyer Ave
CrossesCoyote Creek
Location0.01 MI E Palisade DR
RouteCounty Highway 0
Coordinates37.28413, -121.81415
Functional classUrban Collector

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.1 US tons
Inventory rating16.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length215 ft (65.5 m)
Longest span58 ft (17.7 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,275 (2010)
Projected traffic11,069 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Hellyer Ave over Coyote Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1996.

What condition is Hellyer Ave over Coyote Creek 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 March 2024.

How much traffic does Hellyer Ave over Coyote Creek carry?

About 9,275 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is Hellyer Ave over Coyote Creek?

The structure is 215 ft (65.5 m) long with a longest span of 58 ft (17.7 m) and a deck 26 ft wide.

Who owns Hellyer Ave over Coyote Creek?

It is owned by the County Highway Agency.