US Bridges

Woodruff LN over Simmerly Slough

Fair

Yuba County, California · 0.9 MI East of S.R. 70 · Structure no. 16C0044

Built
1929
96 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
33 ft
2 main spans
Daily traffic
900
2008 count
Owner
County
County Highway Agency

About this bridge

Woodruff LN over Simmerly Slough is a concrete continuous slab carrying Woodruff LN over Simmerly Slough in Yuba County, California. It was built in 1929, so it is 96 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 900 vehicles a day, roughly 10% of them trucks, projected to reach 3,327 by 2046. The structure is 33 ft (10.1 m) long and 22 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesWoodruff LN
CrossesSimmerly Slough
Location0.9 MI East of S.R. 70
RouteCounty Highway 0
Coordinates39.21958, -121.58395
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.1 US tons
Inventory rating18.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span15 ft (4.7 m)
Deck width22 ft (6.7 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2008)
Projected traffic3,327 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Woodruff LN over Simmerly Slough built?

It was built in 1929, making it 96 years old in 2025.

What condition is Woodruff LN over Simmerly 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 August 2024.

How much traffic does Woodruff LN over Simmerly Slough carry?

About 900 vehicles per day (2008 count), of which roughly 10% are trucks.

How long is Woodruff LN over Simmerly Slough?

The structure is 33 ft (10.1 m) long with a longest span of 15 ft (4.7 m) and a deck 22 ft wide.

Who owns Woodruff LN over Simmerly Slough?

It is owned by the County Highway Agency.