US Bridges

East Dunne Ave over Anderson Reservoir

Good

Santa Clara County, California · 0.5 MI E of Coyote Res RD · Structure no. 37C0166

Built
1987
38 years old
Condition
Good
inspected November 2024
Type
Truss - Thru
Steel
Length
377 ft
1 main span
Daily traffic
215
2010 count
Owner
County
County Highway Agency

About this bridge

East Dunne Ave over Anderson Reservoir is a steel truss - thru carrying East Dunne Ave over Anderson Reservoir in Santa Clara County, California. It was built in 1987, so it is 38 years old, younger 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 215 vehicles a day, roughly 5% of them trucks, projected to reach 522 by 2044. The structure is 377 ft (114.9 m) long and 35 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

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CarriesEast Dunne Ave
CrossesAnderson Reservoir
Location0.5 MI E of Coyote Res RD
RouteCounty Highway 0
CountySanta Clara County
StateCalifornia
Coordinates37.15287, -121.58172
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33.2 US tons
Inventory rating20 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length377 ft (114.9 m)
Longest span300 ft (91.4 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deck17 ft (5 m)

Traffic and service

Average daily traffic215 (2010)
Projected traffic522 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was East Dunne Ave over Anderson Reservoir built?

It was built in 1987, making it 38 years old in 2025.

What condition is East Dunne Ave over Anderson Reservoir 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 November 2024.

How much traffic does East Dunne Ave over Anderson Reservoir carry?

About 215 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is East Dunne Ave over Anderson Reservoir?

The structure is 377 ft (114.9 m) long with a longest span of 300 ft (91.4 m) and a deck 35 ft wide.

Who owns East Dunne Ave over Anderson Reservoir?

It is owned by the County Highway Agency.