US Bridges

Winding Road over Blue Creek

Fair

Calaveras County, California · No Data Entered · Structure no. 051652000001038

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
71 ft
3 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Winding Road over Blue Creek is a wood or timber stringer/multi-beam or girder carrying Winding Road over Blue Creek in Calaveras County, California. It was built in 1981, so it is 44 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 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 71 ft (21.5 m) long and 15 ft wide.

Location

Open in Google Maps
CarriesWinding Road
CrossesBlue Creek
LocationNo Data Entered
RouteFederal Lands Road 7N09
CountyCalaveras County
StateCalifornia
Coordinates38.43542, -120.21072
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.5 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length71 ft (21.5 m)
Longest span71 ft (21.5 m)
Deck width15 ft (4.5 m)
Roadway width14 ft (4.2 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 Blue Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Winding Road over Blue Creek 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 Blue Creek carry?

About 50 vehicles per day (latest count).

How long is Winding Road over Blue Creek?

The structure is 71 ft (21.5 m) long with a longest span of 71 ft (21.5 m) and a deck 15 ft wide.

Who owns Winding Road over Blue Creek?

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