US Bridges

County Road 90 over Bird Creek

Good

Yolo County, California · 0.5 MI South of CR 8 · Structure no. 22C0039

Built
1968
57 years old
Condition
Good
inspected January 2023
Type
Slab
Concrete Continuous
Length
68 ft
2 main spans
Daily traffic
20
2014 count
Owner
County
County Highway Agency

About this bridge

County Road 90 over Bird Creek is a concrete continuous slab carrying County Road 90 over Bird Creek in Yolo County, California. It was built in 1968, so it is 57 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 28 by 2045. The structure is 68 ft (20.7 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCounty Road 90
CrossesBird Creek
Location0.5 MI South of CR 8
RouteCounty Highway 0
CountyYolo County
StateCalifornia
Coordinates38.85387, -121.95176
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 within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length68 ft (20.7 m)
Longest span33 ft (10.1 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2014)
Projected traffic28 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 90 over Bird Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is County Road 90 over Bird 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 90 over Bird Creek carry?

About 20 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is County Road 90 over Bird Creek?

The structure is 68 ft (20.7 m) long with a longest span of 33 ft (10.1 m) and a deck 34 ft wide.

Who owns County Road 90 over Bird Creek?

It is owned by the County Highway Agency.