US Bridges

Healdsburg Ave over Russian River

Fair

Sonoma County, California · 35.2 MI N Marin CO Line · Structure no. 20C0065

Built
1921
104 years old, rebuilt 2016
Condition
Fair
inspected May 2023
Type
Truss - Thru
Steel
Length
437 ft
2 main spans
Daily traffic
8,204
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Healdsburg Ave over Russian River is a steel truss - thru carrying Healdsburg Ave over Russian River in Sonoma County, California. It was built in 1921 and reconstructed in 2016, so it is 104 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 8,204 vehicles a day, roughly 5% of them trucks, projected to reach 8,695 by 2045. The structure is 437 ft (133.1 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHealdsburg Ave
CrossesRussian River
Location35.2 MI N Marin CO Line
RouteCity Street 0
CountySonoma County
StateCalifornia
Coordinates38.60388, -122.86084
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length437 ft (133.1 m)
Longest span198 ft (60.4 m)
Deck width37 ft (11.2 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deck15 ft (4.5 m)

Traffic and service

Average daily traffic8,204 (2015)
Projected traffic8,695 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Healdsburg Ave over Russian River built?

It was built in 1921, making it 104 years old in 2025. It was reconstructed in 2016.

What condition is Healdsburg Ave over Russian River 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 2023.

How much traffic does Healdsburg Ave over Russian River carry?

About 8,204 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Healdsburg Ave over Russian River?

The structure is 437 ft (133.1 m) long with a longest span of 198 ft (60.4 m) and a deck 37 ft wide.

Who owns Healdsburg Ave over Russian River?

It is owned by the City or Municipal Highway Agency.