US Bridges

County Road 99W over Willow Spring Creek

Good

Yolo County, California · At Intersection of CR13 · Structure no. 22C0065

Built
1949
76 years old
Condition
Good
inspected January 2023
Type
Culvert
Concrete Continuous
Length
34 ft
3 main spans
Daily traffic
1,176
2014 count
Owner
County
County Highway Agency

About this bridge

County Road 99W over Willow Spring Creek is a concrete continuous culvert carrying County Road 99W over Willow Spring Creek in Yolo County, California. It was built in 1949, so it is 76 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 1,176 vehicles a day, roughly 10% of them trucks, projected to reach 872 by 2041. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road 99W
CrossesWillow Spring Creek
LocationAt Intersection of CR13
RouteCounty Highway 0
CountyYolo County
StateCalifornia
Coordinates38.79449, -121.87738
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,176 (2014)
Projected traffic872 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 99W over Willow Spring Creek built?

It was built in 1949, making it 76 years old in 2025.

What condition is County Road 99W over Willow Spring 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 99W over Willow Spring Creek carry?

About 1,176 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is County Road 99W over Willow Spring Creek?

The structure is 34 ft (10.4 m) long with a longest span of 11 ft (3.4 m).

Who owns County Road 99W over Willow Spring Creek?

It is owned by the County Highway Agency.