US Bridges

C.R. #24 over South Fork Willow Slough

Good

Yolo County, California · Approx. 2.5 MI E SH 505 · Structure no. 22C0046

Built
1969
56 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete Continuous
Length
110 ft
3 main spans
Daily traffic
681
2009 count
Owner
County
County Highway Agency

About this bridge

C.R. #24 over South Fork Willow Slough is a concrete continuous slab carrying C.R. #24 over South Fork Willow Slough in Yolo County, California. It was built in 1969, so it is 56 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 681 vehicles a day, roughly 7% of them trucks, projected to reach 861 by 2045. The structure is 110 ft (33.5 m) long and 41 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesC.R. #24
CrossesSouth Fork Willow Slough
LocationApprox. 2.5 MI E SH 505
RouteCounty Highway 0
Coordinates38.66359, -121.9055
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.5 US tons
Inventory rating59.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span36 ft (11 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic681 (2009)
Projected traffic861 by 2045
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 C.R. #24 over South Fork Willow Slough built?

It was built in 1969, making it 56 years old in 2025.

What condition is C.R. #24 over South Fork Willow Slough in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does C.R. #24 over South Fork Willow Slough carry?

About 681 vehicles per day (2009 count), of which roughly 7% are trucks.

How long is C.R. #24 over South Fork Willow Slough?

The structure is 110 ft (33.5 m) long with a longest span of 36 ft (11 m) and a deck 41 ft wide.

Who owns C.R. #24 over South Fork Willow Slough?

It is owned by the County Highway Agency.