US Bridges

Leveroni RD over Carriger Creek

Fair

Sonoma County, California · 1.05 MI W of SR 12 · Structure no. 20C0209

Built
1972
53 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
83 ft
3 main spans
Daily traffic
6,000
2015 count
Owner
County
County Highway Agency

About this bridge

Leveroni RD over Carriger Creek is a concrete continuous slab carrying Leveroni RD over Carriger Creek in Sonoma County, California. It was built in 1972, so it is 53 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 6,000 vehicles a day, roughly 2% of them trucks, projected to reach 7,524 by 2040. The structure is 83 ft (25.3 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLeveroni RD
CrossesCarriger Creek
Location1.05 MI W of SR 12
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.27599, -122.47797
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating40.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length83 ft (25.3 m)
Longest span32 ft (9.8 m)
Deck width36 ft (11 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2015)
Projected traffic7,524 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Leveroni RD over Carriger Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Leveroni RD over Carriger 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 May 2023.

How much traffic does Leveroni RD over Carriger Creek carry?

About 6,000 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Leveroni RD over Carriger Creek?

The structure is 83 ft (25.3 m) long with a longest span of 32 ft (9.8 m) and a deck 36 ft wide.

Who owns Leveroni RD over Carriger Creek?

It is owned by the County Highway Agency.