US Bridges

Tantau Ave over Calabazas Creek

Fair

Santa Clara County, California · North of I-280 · Structure no. 37C0290

Built
1966
59 years old, rebuilt 1998
Condition
Fair
inspected May 2024
Type
Culvert
Concrete Continuous
Length
48 ft
4 main spans
Daily traffic
7,700
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Tantau Ave over Calabazas Creek is a concrete continuous culvert carrying Tantau Ave over Calabazas Creek in Santa Clara County, California. It was built in 1966 and reconstructed in 1998, so it is 59 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 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 7,700 vehicles a day, roughly 10% of them trucks, projected to reach 16,574 by 2045. The structure is 48 ft (14.5 m) long and 78 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesTantau Ave
CrossesCalabazas Creek
LocationNorth of I-280
RouteCity Street 0
Coordinates37.32991, -122.00574
Functional classRural Major 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
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
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.9 US tons
Inventory rating32.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadUnknown
Structure length48 ft (14.5 m)
Longest span11 ft (3.4 m)
Deck width78 ft (23.8 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,700 (2020)
Projected traffic16,574 by 2045
Trucks10%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Tantau Ave over Calabazas Creek built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1998.

What condition is Tantau Ave 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 Tantau Ave over Calabazas Creek carry?

About 7,700 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Tantau Ave over Calabazas Creek?

The structure is 48 ft (14.5 m) long with a longest span of 11 ft (3.4 m) and a deck 78 ft wide.

Who owns Tantau Ave over Calabazas Creek?

It is owned by the City or Municipal Highway Agency.