US Bridges

Grove RD over Carriger Creek

Fair

Sonoma County, California · 1.7 MI W JCT Arnold RD · Structure no. 20C0456

Built
1960
65 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
27 ft
1 main span
Daily traffic
1,850
2015 count
Owner
County
County Highway Agency

About this bridge

Grove RD over Carriger Creek is a concrete culvert carrying Grove RD over Carriger Creek in Sonoma County, California. It was built in 1960, so it is 65 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 1,850 vehicles a day, roughly 1% of them trucks, projected to reach 2,244 by 2046. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesGrove RD
CrossesCarriger Creek
Location1.7 MI W JCT Arnold RD
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.29435, -122.52596
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span24 ft (7.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,850 (2015)
Projected traffic2,244 by 2046
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Grove RD over Carriger Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Grove 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 October 2024.

How much traffic does Grove RD over Carriger Creek carry?

About 1,850 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Grove RD over Carriger Creek?

The structure is 27 ft (8.2 m) long with a longest span of 24 ft (7.4 m).

Who owns Grove RD over Carriger Creek?

It is owned by the County Highway Agency.