US Bridges

Winding Road over South Fork Tuolumne Riv

Fair

Tuolumne County, California · No Data Entered · Structure no. 051654000001009

Built
1961
64 years old
Condition
Fair
inspected September 2023
Type
Tee Beam
Concrete Continuous
Length
189 ft
3 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Winding Road over South Fork Tuolumne Riv is a concrete continuous tee beam carrying Winding Road over South Fork Tuolumne Riv in Tuolumne County, California. It was built in 1961, so it is 64 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 189 ft (57.6 m) long and 17 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesWinding Road
CrossesSouth Fork Tuolumne Riv
LocationNo Data Entered
RouteFederal Lands Road 1N10
Coordinates37.8379, -120.04792
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation*: *
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating—
Inventory rating—

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length189 ft (57.6 m)
Longest span75 ft (22.9 m)
Deck width17 ft (5.1 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Winding Road over South Fork Tuolumne Riv built?

It was built in 1961, making it 64 years old in 2025.

What condition is Winding Road over South Fork Tuolumne Riv 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 September 2023.

How much traffic does Winding Road over South Fork Tuolumne Riv carry?

About 50 vehicles per day (latest count).

How long is Winding Road over South Fork Tuolumne Riv?

The structure is 189 ft (57.6 m) long with a longest span of 75 ft (22.9 m) and a deck 17 ft wide.

Who owns Winding Road over South Fork Tuolumne Riv?

It is owned by the U.S. Forest Service.