US Bridges

Jack Tone Road over S Fk S Littlejohns Creek

Good

San Joaquin County, California · 1.7 MI S Mariposa RD · Structure no. 29C0193

Built
1955
70 years old, rebuilt 1978
Condition
Good
inspected January 2025
Type
Slab
Concrete Continuous
Length
41 ft
2 main spans
Daily traffic
2,204
2017 count
Owner
County
County Highway Agency

About this bridge

Jack Tone Road over S Fk S Littlejohns Creek is a concrete continuous slab carrying Jack Tone Road over S Fk S Littlejohns Creek in San Joaquin County, California. It was built in 1955 and reconstructed in 1978, so it is 70 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,204 vehicles a day, roughly 5% of them trucks, projected to reach 5,471 by 2045. The structure is 41 ft (12.5 m) long and 41 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesJack Tone Road
CrossesS Fk S Littlejohns Creek
Location1.7 MI S Mariposa RD
RouteCounty Highway 0
Coordinates37.88038, -121.14669
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.8 US tons
Inventory rating55 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span20 ft (6.1 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,204 (2017)
Projected traffic5,471 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Jack Tone Road over S Fk S Littlejohns Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1978.

What condition is Jack Tone Road over S Fk S Littlejohns Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does Jack Tone Road over S Fk S Littlejohns Creek carry?

About 2,204 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Jack Tone Road over S Fk S Littlejohns Creek?

The structure is 41 ft (12.5 m) long with a longest span of 20 ft (6.1 m) and a deck 41 ft wide.

Who owns Jack Tone Road over S Fk S Littlejohns Creek?

It is owned by the County Highway Agency.