US Bridges

County Road 29 over Dry Slough

Good

Yolo County, California · 0.77 MI W of C.R. #98 · Structure no. 22C0117

Built
1930
95 years old
Condition
Good
inspected November 2023
Type
Tee Beam
Concrete
Length
52 ft
1 main span
Daily traffic
645
2009 count
Owner
County
County Highway Agency

About this bridge

County Road 29 over Dry Slough is a concrete tee beam carrying County Road 29 over Dry 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 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 645 vehicles a day, roughly 3% of them trucks, projected to reach 2,093 by 2043. The structure is 52 ft (15.8 m) long and 23 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Road 29
CrossesDry Slough
Location0.77 MI W of C.R. #98
RouteCounty Highway 0
CountyYolo County
StateCalifornia
Coordinates38.59069, -121.81602
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.1 US tons
Inventory rating16.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length52 ft (15.8 m)
Longest span50 ft (15.2 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic645 (2009)
Projected traffic2,093 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 29 over Dry Slough built?

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

What condition is County Road 29 over Dry 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 County Road 29 over Dry Slough carry?

About 645 vehicles per day (2009 count), of which roughly 3% are trucks.

How long is County Road 29 over Dry Slough?

The structure is 52 ft (15.8 m) long with a longest span of 50 ft (15.2 m) and a deck 23 ft wide.

Who owns County Road 29 over Dry Slough?

It is owned by the County Highway Agency.