US Bridges

County Road 88 over N Fork Dunnigan Creek

Good

Yolo County, California · 0.7 MI N of County Road 6 · Structure no. 22C0160

Built
1985
40 years old
Condition
Good
inspected January 2023
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
432
2014 count
Owner
County
County Highway Agency

About this bridge

County Road 88 over N Fork Dunnigan Creek is a concrete slab carrying County Road 88 over N Fork Dunnigan Creek in Yolo County, California. It was built in 1985, so it is 40 years old, younger 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 432 vehicles a day, roughly 7% of them trucks, projected to reach 437 by 2045. The structure is 32 ft (9.9 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road 88
CrossesN Fork Dunnigan Creek
Location0.7 MI N of County Road 6
RouteCounty Highway 0
Coordinates38.89207, -121.98961
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.9 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic432 (2014)
Projected traffic437 by 2045
Trucks7%
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road 88 over N Fork Dunnigan Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is County Road 88 over N Fork Dunnigan Creek 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 January 2023.

How much traffic does County Road 88 over N Fork Dunnigan Creek carry?

About 432 vehicles per day (2014 count), of which roughly 7% are trucks.

How long is County Road 88 over N Fork Dunnigan Creek?

The structure is 32 ft (9.9 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns County Road 88 over N Fork Dunnigan Creek?

It is owned by the County Highway Agency.