US Bridges

Welburn Ave over Miller Slough

Good

Santa Clara County, California · Near Church ST · Structure no. 37C0273

Built
1950
75 years old, rebuilt 2003
Condition
Good
inspected December 2024
Type
Slab
Concrete Continuous
Length
56 ft
3 main spans
Daily traffic
10,617
2012 count
Owner
City
City or Municipal Highway Agency

About this bridge

Welburn Ave over Miller Slough is a concrete continuous slab carrying Welburn Ave over Miller Slough in Santa Clara County, California. It was built in 1950 and reconstructed in 2003, so it is 75 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10,617 vehicles a day, roughly 4% of them trucks, projected to reach 12,795 by 2046. The structure is 56 ft (17.1 m) long and 64 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesWelburn Ave
CrossesMiller Slough
LocationNear Church ST
RouteCity Street 0
Coordinates37.01875, -121.5784
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.9 US tons
Inventory rating17.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length56 ft (17.1 m)
Longest span28 ft (8.5 m)
Deck width64 ft (19.5 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,617 (2012)
Projected traffic12,795 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Welburn Ave over Miller Slough built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2003.

What condition is Welburn Ave over Miller Slough in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does Welburn Ave over Miller Slough carry?

About 10,617 vehicles per day (2012 count), of which roughly 4% are trucks.

How long is Welburn Ave over Miller Slough?

The structure is 56 ft (17.1 m) long with a longest span of 28 ft (8.5 m) and a deck 64 ft wide.

Who owns Welburn Ave over Miller Slough?

It is owned by the City or Municipal Highway Agency.