US Bridges

Encinal RD over Live Oak Slough

Fair

Sutter County, California · 0.2 MI W of Larkin RD · Structure no. 18C0103

Built
1955
70 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
335
2015 count
Owner
County
County Highway Agency

About this bridge

Encinal RD over Live Oak Slough is a concrete continuous culvert carrying Encinal RD over Live Oak Slough in Sutter County, California. It was built in 1955, so it is 70 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 335 vehicles a day, roughly 6% of them trucks, projected to reach 491 by 2042. The structure is 22 ft (6.7 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesEncinal RD
CrossesLive Oak Slough
Location0.2 MI W of Larkin RD
RouteCounty Highway 0
CountySutter County
StateCalifornia
Coordinates39.21829, -121.66396
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic335 (2015)
Projected traffic491 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Encinal RD over Live Oak Slough built?

It was built in 1955, making it 70 years old in 2025.

What condition is Encinal RD over Live Oak 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 February 2024.

How much traffic does Encinal RD over Live Oak Slough carry?

About 335 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is Encinal RD over Live Oak Slough?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 25 ft wide.

Who owns Encinal RD over Live Oak Slough?

It is owned by the County Highway Agency.