US Bridges

County Road 96 over Union School Slough

Fair

Yolo County, California · 1.38 MI S of C.R. #27 · Structure no. 22C0126

Built
1930
95 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Concrete
Length
40 ft
1 main span
Daily traffic
200
2009 count
Owner
County
County Highway Agency

About this bridge

County Road 96 over Union School Slough is a concrete tee beam carrying County Road 96 over Union School Slough in Yolo 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 200 vehicles a day, roughly 5% of them trucks, projected to reach 272 by 2043. The structure is 40 ft (12.2 m) long and 23 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesCounty Road 96
CrossesUnion School Slough
Location1.38 MI S of C.R. #27
RouteCounty Highway 0
CountyYolo County
StateCalifornia
Coordinates38.59999, -121.84006
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
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be 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 alignment6: Equal to present minimum criteria
Operating rating28.2 US tons
Inventory rating16.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span37 ft (11.3 m)
Deck width23 ft (7.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2009)
Projected traffic272 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 County Road 96 over Union School Slough built?

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

What condition is County Road 96 over Union School 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 November 2023.

How much traffic does County Road 96 over Union School Slough carry?

About 200 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is County Road 96 over Union School Slough?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.3 m) and a deck 23 ft wide.

Who owns County Road 96 over Union School Slough?

It is owned by the County Highway Agency.