US Bridges

Winding Road over Tuolumne River

Good

Tuolumne County, California · No Data Entered · Structure no. 051654000001001

Built
1999
26 years old
Condition
Good
inspected July 2022
Type
Slab
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
155
Owner
Federal
U.S. Forest Service

About this bridge

Winding Road over Tuolumne River is a prestressed concrete slab carrying Winding Road over Tuolumne River in Tuolumne County, California. It was built in 1999, so it is 26 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 155 vehicles a day, roughly 1% of them trucks, projected to reach 232 by 2045. The structure is 62 ft (18.9 m) long and 20 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesWinding Road
CrossesTuolumne River
LocationNo Data Entered
RouteFederal Lands Road 1S28
Coordinates37.82132, -120.0122
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.2 US tons
Inventory rating34.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span62 ft (18.9 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic155 (—)
Projected traffic232 by 2045
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Tuolumne River built?

It was built in 1999, making it 26 years old in 2025.

What condition is Winding Road over Tuolumne River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2022.

How much traffic does Winding Road over Tuolumne River carry?

About 155 vehicles per day (latest count), of which roughly 1% are trucks.

How long is Winding Road over Tuolumne River?

The structure is 62 ft (18.9 m) long with a longest span of 62 ft (18.9 m) and a deck 20 ft wide.

Who owns Winding Road over Tuolumne River?

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