US Bridges

IRR BIA RTE 141 over Turnback Creek

Fair

Tuolumne County, California · Miwu RD 1.2KM E of W Hani · Structure no. 00000000000J060

Built
1980
45 years old, rebuilt 2010
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
38 ft
1 main span
Daily traffic
20
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 141 over Turnback Creek is a wood or timber stringer/multi-beam or girder carrying IRR BIA RTE 141 over Turnback Creek in Tuolumne County, California. It was built in 1980 and reconstructed in 2010, so it is 45 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 20 vehicles a day, roughly 2% of them trucks, projected to reach 30 by 2043. The structure is 38 ft (11.7 m) long and 14 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesIRR BIA RTE 141
CrossesTurnback Creek
LocationMiwu RD 1.2KM E of W Hani
RouteFederal Lands Road 141
CountyTuolumne County
StateCalifornia
Coordinates37.98608, -120.23358
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating53.6 US tons
Inventory rating34.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length38 ft (11.7 m)
Longest span29 ft (8.9 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic30 by 2043
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
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 IRR BIA RTE 141 over Turnback Creek built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 2010.

What condition is IRR BIA RTE 141 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 October 2023.

How much traffic does IRR BIA RTE 141 over Turnback Creek carry?

About 20 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is IRR BIA RTE 141 over Turnback Creek?

The structure is 38 ft (11.7 m) long with a longest span of 29 ft (8.9 m) and a deck 14 ft wide.

Who owns IRR BIA RTE 141 over Turnback Creek?

It is owned by the Bureau of Indian Affairs.