US Bridges

Winding Road over Clavey River

Fair

Tuolumne County, California · No Data Entered · Structure no. 051651000001012

Built
1958
67 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
71 ft
1 main span
Daily traffic
240
Owner
Federal
U.S. Forest Service

About this bridge

Winding Road over Clavey River is a steel stringer/multi-beam or girder carrying Winding Road over Clavey River in Tuolumne County, California. It was built in 1958, so it is 67 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 240 vehicles a day, roughly 33% of them trucks, projected to reach 360 by 2045. The structure is 71 ft (21.7 m) long and 17 ft wide.

Location

Open in Google Maps
CarriesWinding Road
CrossesClavey River
LocationNo Data Entered
RouteFederal Lands Road 3N01
CountyTuolumne County
StateCalifornia
Coordinates38.07615, -120.01165
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating40 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length71 ft (21.7 m)
Longest span69 ft (21 m)
Deck width17 ft (5.1 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (—)
Projected traffic360 by 2045
Trucks33%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Clavey River built?

It was built in 1958, making it 67 years old in 2025.

What condition is Winding Road over Clavey River 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 Clavey River carry?

About 240 vehicles per day (latest count), of which roughly 33% are trucks.

How long is Winding Road over Clavey River?

The structure is 71 ft (21.7 m) long with a longest span of 69 ft (21 m) and a deck 17 ft wide.

Who owns Winding Road over Clavey River?

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