US Bridges

Tioga Road over South Fork Tuolumne Rive

Fair

Tuolumne County, California · 7.0 Miles East from El Po · Structure no. 8800021P0000000

Built
1937
88 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
68 ft
1 main span
Daily traffic
2,041
2022 count
Owner
Federal
National Park Service

About this bridge

Tioga Road over South Fork Tuolumne Rive is a steel stringer/multi-beam or girder carrying Tioga Road over South Fork Tuolumne Rive in Tuolumne County, California. It was built in 1937, so it is 88 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 2,041 vehicles a day, roughly 1% of them trucks, projected to reach 2,449 by 2042. The structure is 68 ft (20.7 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesTioga Road
CrossesSouth Fork Tuolumne Rive
Location7.0 Miles East from El Po
RouteFederal Lands Road 17
CountyTuolumne County
StateCalifornia
Coordinates37.79248, -119.72264
Functional classRural Minor Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length68 ft (20.7 m)
Longest span60 ft (18.3 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,041 (2022)
Projected traffic2,449 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$147,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Tioga Road over South Fork Tuolumne Rive built?

It was built in 1937, making it 88 years old in 2025.

What condition is Tioga Road over South Fork Tuolumne Rive 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 Tioga Road over South Fork Tuolumne Rive carry?

About 2,041 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Tioga Road over South Fork Tuolumne Rive?

The structure is 68 ft (20.7 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.

Who owns Tioga Road over South Fork Tuolumne Rive?

It is owned by the National Park Service.