US Bridges

County Road 158 over Elk Slough

Fair

Yolo County, California · East of State Route 84 · Structure no. 22C0025

Built
1959
66 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
227 ft
8 main spans
Daily traffic
1,240
2014 count
Owner
County
County Highway Agency

About this bridge

County Road 158 over Elk Slough is a concrete continuous slab carrying County Road 158 over Elk Slough in Yolo County, California. It was built in 1959, so it is 66 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 6 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 1,240 vehicles a day, roughly 6% of them trucks, projected to reach 2,187 by 2042. The structure is 227 ft (69.1 m) long and 32 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesCounty Road 158
CrossesElk Slough
LocationEast of State Route 84
RouteCounty Highway 0
CountyYolo County
StateCalifornia
Coordinates38.34185, -121.58132
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating27.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadUnknown
Structure length227 ft (69.1 m)
Longest span28 ft (8.5 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,240 (2014)
Projected traffic2,187 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 158 over Elk Slough built?

It was built in 1959, making it 66 years old in 2025.

What condition is County Road 158 over Elk Slough 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 2024.

How much traffic does County Road 158 over Elk Slough carry?

About 1,240 vehicles per day (2014 count), of which roughly 6% are trucks.

How long is County Road 158 over Elk Slough?

The structure is 227 ft (69.1 m) long with a longest span of 28 ft (8.5 m) and a deck 32 ft wide.

Who owns County Road 158 over Elk Slough?

It is owned by the County Highway Agency.