US Bridges

Santa Rosa Ave over N Bra Lag De Santa Rosa

Fair

Sonoma County, California · Near Santa Rosa Ave. · Structure no. 20C0063

Built
1918
107 years old, rebuilt 2000
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
43 ft
3 main spans
Daily traffic
5,000
2015 count
Owner
County
County Highway Agency

About this bridge

Santa Rosa Ave over N Bra Lag De Santa Rosa is a concrete continuous slab carrying Santa Rosa Ave over N Bra Lag De Santa Rosa in Sonoma County, California. It was built in 1918 and reconstructed in 2000, so it is 107 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 5,000 vehicles a day, roughly 1% of them trucks, projected to reach 6,200 by 2040. The structure is 43 ft (13.1 m) long and 58 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSanta Rosa Ave
CrossesN Bra Lag De Santa Rosa
LocationNear Santa Rosa Ave.
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.3721, -122.71337
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.8 US tons
Inventory rating46.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length43 ft (13.1 m)
Longest span18 ft (5.5 m)
Deck width58 ft (17.6 m)
Roadway width50 ft (15.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2015)
Projected traffic6,200 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Santa Rosa Ave over N Bra Lag De Santa Rosa built?

It was built in 1918, making it 107 years old in 2025. It was reconstructed in 2000.

What condition is Santa Rosa Ave over N Bra Lag De Santa Rosa 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 October 2023.

How much traffic does Santa Rosa Ave over N Bra Lag De Santa Rosa carry?

About 5,000 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Santa Rosa Ave over N Bra Lag De Santa Rosa?

The structure is 43 ft (13.1 m) long with a longest span of 18 ft (5.5 m) and a deck 58 ft wide.

Who owns Santa Rosa Ave over N Bra Lag De Santa Rosa?

It is owned by the County Highway Agency.