US Bridges

Road Xx over Vansyckle Slough

Fair

Glenn County, California · 0.2 Mii South of Road 19 · Structure no. 11C0151

Built
1930
95 years old
Condition
Fair
inspected February 2024
Type
Girder and Floorbeam System
Concrete Continuous
Length
44 ft
2 main spans
Daily traffic
26
2008 count
Owner
County
County Highway Agency

About this bridge

Road Xx over Vansyckle Slough is a concrete continuous girder and floorbeam system carrying Road Xx over Vansyckle Slough in Glenn County, California. It was built in 1930, so it is 95 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 26 vehicles a day, projected to reach 34 by 2042. The structure is 44 ft (13.4 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRoad Xx
CrossesVansyckle Slough
Location0.2 Mii South of Road 19
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.72488, -122.0213
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
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 protection7 GoodSome minor problems.
Last inspectionFebruary 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
Deck geometry5: 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 rating31.1 US tons
Inventory rating18.5 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length44 ft (13.4 m)
Longest span22 ft (6.7 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2008)
Projected traffic34 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Road Xx over Vansyckle Slough built?

It was built in 1930, making it 95 years old in 2025.

What condition is Road Xx over Vansyckle Slough 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 February 2024.

How much traffic does Road Xx over Vansyckle Slough carry?

About 26 vehicles per day (2008 count).

How long is Road Xx over Vansyckle Slough?

The structure is 44 ft (13.4 m) long with a longest span of 22 ft (6.7 m) and a deck 22 ft wide.

Who owns Road Xx over Vansyckle Slough?

It is owned by the County Highway Agency.