US Bridges

E Middlefield Road over Central Expressway

Fair

Santa Clara County, California · At Central Expwy · Structure no. 37C0123

Built
1971
54 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
276 ft
4 main spans
Daily traffic
14,000
2015 count
Owner
County
County Highway Agency

About this bridge

E Middlefield Road over Central Expressway is a concrete continuous box beam or girders - multiple carrying E Middlefield Road over Central Expressway in Santa Clara County, California. It was built in 1971, so it is 54 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 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 14,000 vehicles a day, roughly 5% of them trucks, projected to reach 15,813 by 2040. The structure is 276 ft (84.1 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesE Middlefield Road
CrossesCentral Expressway
LocationAt Central Expwy
RouteCity Street 0
CountySanta Clara County
StateCalifornia
Coordinates37.38638, -122.04621
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating110 US tons
Inventory rating69.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length276 ft (84.1 m)
Longest span84 ft (25.6 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,000 (2015)
Projected traffic15,813 by 2040
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was E Middlefield Road over Central Expressway built?

It was built in 1971, making it 54 years old in 2025.

What condition is E Middlefield Road over Central Expressway 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 September 2023.

How much traffic does E Middlefield Road over Central Expressway carry?

About 14,000 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is E Middlefield Road over Central Expressway?

The structure is 276 ft (84.1 m) long with a longest span of 84 ft (25.6 m) and a deck 35 ft wide.

Who owns E Middlefield Road over Central Expressway?

It is owned by the County Highway Agency.