US Bridges

Ponderosa Way over Turnback Creek

Fair

Tuolumne County, California · 0.7 MI South of SR 108 · Structure no. 32C0063

Built
1970
55 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
922
2014 count
Owner
County
County Highway Agency

About this bridge

Ponderosa Way over Turnback Creek is a concrete slab carrying Ponderosa Way over Turnback Creek in Tuolumne County, California. It was built in 1970, so it is 55 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 922 vehicles a day, roughly 1% of them trucks, projected to reach 332 by 2046. The structure is 32 ft (9.8 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesPonderosa Way
CrossesTurnback Creek
Location0.7 MI South of SR 108
RouteCounty Highway 0
CountyTuolumne County
StateCalifornia
Coordinates37.99674, -120.22774
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.2 US tons
Inventory rating23.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic922 (2014)
Projected traffic332 by 2046
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ponderosa Way over Turnback Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Ponderosa Way over Turnback 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 May 2024.

How much traffic does Ponderosa Way over Turnback Creek carry?

About 922 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is Ponderosa Way over Turnback Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns Ponderosa Way over Turnback Creek?

It is owned by the County Highway Agency.