US Bridges

Santa Rosa Ave over Santa Rosa Creek

Fair

Sonoma County, California · Betwn Sonoma Ave-First ST · Structure no. 20C0041

Built
1928
97 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete Continuous
Length
104 ft
3 main spans
Daily traffic
31,300
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Santa Rosa Ave over Santa Rosa Creek is a concrete continuous tee beam carrying Santa Rosa Ave over Santa Rosa Creek in Sonoma County, California. It was built in 1928, so it is 97 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 31,300 vehicles a day, roughly 2% of them trucks, projected to reach 21,660 by 2044. The structure is 104 ft (31.7 m) long and 83 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSanta Rosa Ave
CrossesSanta Rosa Creek
LocationBetwn Sonoma Ave-First ST
RouteCity Street 0
CountySonoma County
StateCalifornia
Coordinates38.43715, -122.71226
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating42.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length104 ft (31.7 m)
Longest span50 ft (15.2 m)
Deck width83 ft (25.3 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,300 (2019)
Projected traffic21,660 by 2044
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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 Santa Rosa Ave over Santa Rosa Creek built?

It was built in 1928, making it 97 years old in 2025.

What condition is Santa Rosa Ave over Santa Rosa Creek 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 Santa Rosa Ave over Santa Rosa Creek carry?

About 31,300 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Santa Rosa Ave over Santa Rosa Creek?

The structure is 104 ft (31.7 m) long with a longest span of 50 ft (15.2 m) and a deck 83 ft wide.

Who owns Santa Rosa Ave over Santa Rosa Creek?

It is owned by the City or Municipal Highway Agency.