US Bridges

Healdsburg Ave over Russian River Overflow

Fair

Sonoma County, California · Int of Bailache Ave · Structure no. 20C0066

Built
1987
38 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
138 ft
5 main spans
Daily traffic
8,204
2010 count
Owner
City
City or Municipal Highway Agency

About this bridge

Healdsburg Ave over Russian River Overflow is a concrete continuous slab carrying Healdsburg Ave over Russian River Overflow in Sonoma 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 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 3% of them trucks, projected to reach 8,666 by 2041. The structure is 138 ft (42.1 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesHealdsburg Ave
CrossesRussian River Overflow
LocationInt of Bailache Ave
RouteCity Street 0
Coordinates38.60338, -122.85658
Functional classUrban Other Principal 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
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 alignment6: Equal to present minimum criteria
Operating rating38.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length138 ft (42.1 m)
Longest span30 ft (9.1 m)
Deck width60 ft (18.3 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,204 (2010)
Projected traffic8,666 by 2041
Trucks3%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 Healdsburg Ave over Russian River Overflow built?

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

What condition is Healdsburg Ave over Russian River Overflow 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 Overflow carry?

About 8,204 vehicles per day (2010 count), of which roughly 3% are trucks.

How long is Healdsburg Ave over Russian River Overflow?

The structure is 138 ft (42.1 m) long with a longest span of 30 ft (9.1 m) and a deck 60 ft wide.

Who owns Healdsburg Ave over Russian River Overflow?

It is owned by the City or Municipal Highway Agency.