US Bridges

Middlefield Road over State Route 85

Fair

Santa Clara County, California · 04-SCL-085-R23.19-MVW · Structure no. 37 0213

Built
1965
60 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
193 ft
4 main spans
Daily traffic
23,200
2012 count
Owner
State
State Highway Agency

About this bridge

Middlefield Road over State Route 85 is a concrete continuous box beam or girders - multiple carrying Middlefield Road over State Route 85 in Santa Clara County, California. It was built in 1965, so it is 60 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 23,200 vehicles a day, roughly 2% of them trucks, projected to reach 37,037 by 2044. The structure is 193 ft (58.8 m) long and 70 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMiddlefield Road
CrossesState Route 85
Location04-SCL-085-R23.19-MVW
RouteCity Street 0D002
CountySanta Clara County
StateCalifornia
Coordinates37.39887, -122.06982
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating43.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length193 ft (58.8 m)
Longest span66 ft (20 m)
Deck width70 ft (21.3 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,200 (2012)
Projected traffic37,037 by 2044
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Middlefield Road over State Route 85 built?

It was built in 1965, making it 60 years old in 2025.

What condition is Middlefield Road over State Route 85 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 June 2024.

How much traffic does Middlefield Road over State Route 85 carry?

About 23,200 vehicles per day (2012 count), of which roughly 2% are trucks.

How long is Middlefield Road over State Route 85?

The structure is 193 ft (58.8 m) long with a longest span of 66 ft (20 m) and a deck 70 ft wide.

Who owns Middlefield Road over State Route 85?

It is owned by the State Highway Agency.