US Bridges

County Road 99W over Smith Creek

Fair

Yolo County, California · 0.77 MI SE of CR 13 · Structure no. 22C0064

Built
1916
109 years old, rebuilt 1950
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
1,500
2015 count
Owner
County
County Highway Agency

About this bridge

County Road 99W over Smith Creek is a concrete continuous slab carrying County Road 99W over Smith Creek in Yolo County, California. It was built in 1916 and reconstructed in 1950, so it is 109 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,500 vehicles a day, roughly 40% of them trucks, projected to reach 2,188 by 2047. The structure is 40 ft (12.2 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCounty Road 99W
CrossesSmith Creek
Location0.77 MI SE of CR 13
RouteCounty Highway 0
CountyYolo County
StateCalifornia
Coordinates38.78576, -121.86816
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
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 geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span13 ft (4 m)
Deck width45 ft (13.7 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2015)
Projected traffic2,188 by 2047
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Smith Creek built?

It was built in 1916, making it 109 years old in 2025. It was reconstructed in 1950.

What condition is County Road 99W over Smith Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2025.

How much traffic does County Road 99W over Smith Creek carry?

About 1,500 vehicles per day (2015 count), of which roughly 40% are trucks.

How long is County Road 99W over Smith Creek?

The structure is 40 ft (12.2 m) long with a longest span of 13 ft (4 m) and a deck 45 ft wide.

Who owns County Road 99W over Smith Creek?

It is owned by the County Highway Agency.