US Bridges

Vallco Parkway over Calabazas Creek

Fair

Santa Clara County, California · At Stevens Creek Blvd · Structure no. 37C0844

Built
1978
47 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete Continuous
Length
20 ft
2 main spans
Daily traffic
10,420
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Vallco Parkway over Calabazas Creek is a concrete continuous culvert carrying Vallco Parkway over Calabazas Creek in Santa Clara County, California. It was built in 1978, so it is 47 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 10,420 vehicles a day, roughly 2% of them trucks, projected to reach 11,069 by 2045. The structure is 20 ft (6.2 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesVallco Parkway
CrossesCalabazas Creek
LocationAt Stevens Creek Blvd
RouteCity Street 0
CountySanta Clara County
StateCalifornia
Coordinates37.32496, -122.00941
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length20 ft (6.2 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,420 (2022)
Projected traffic11,069 by 2045
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Vallco Parkway over Calabazas Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Vallco Parkway over Calabazas 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 May 2024.

How much traffic does Vallco Parkway over Calabazas Creek carry?

About 10,420 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Vallco Parkway over Calabazas Creek?

The structure is 20 ft (6.2 m) long with a longest span of 9 ft (2.7 m).

Who owns Vallco Parkway over Calabazas Creek?

It is owned by the City or Municipal Highway Agency.