US Bridges

Winding Road over Mokelumne River

Fair

Calaveras County, California · No Data Entered · Structure no. 051652000001035

Built
1989
36 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
37 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Winding Road over Mokelumne River is a concrete slab carrying Winding Road over Mokelumne River in Calaveras County, California. It was built in 1989, so it is 36 years old, younger 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 37 ft (11.3 m) long and 16 ft wide.

Location

Open in Google Maps
CarriesWinding Road
CrossesMokelumne River
LocationNo Data Entered
RouteFederal Lands Road 6N58
CountyCalaveras County
StateCalifornia
Coordinates38.3597, -120.26962
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation*: *
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating—
Inventory rating—

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span37 ft (11.3 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 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 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 Mokelumne River built?

It was built in 1989, making it 36 years old in 2025.

What condition is Winding Road over Mokelumne 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 2024.

How much traffic does Winding Road over Mokelumne River carry?

About 50 vehicles per day (latest count).

How long is Winding Road over Mokelumne River?

The structure is 37 ft (11.3 m) long with a longest span of 37 ft (11.3 m) and a deck 16 ft wide.

Who owns Winding Road over Mokelumne River?

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