US Bridges

Jack Tone RD over Calaveras River

Good

San Joaquin County, California · 0.5 MI N of 8-MILE RD · Structure no. 29C0082

Built
1962
63 years old
Condition
Good
inspected February 2025
Type
Slab
Concrete Continuous
Length
93 ft
4 main spans
Daily traffic
2,752
2013 count
Owner
County
County Highway Agency

About this bridge

Jack Tone RD over Calaveras River is a concrete continuous slab carrying Jack Tone RD over Calaveras River in San Joaquin County, California. It was built in 1962, so it is 63 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 2,752 vehicles a day, roughly 10% of them trucks, projected to reach 3,058 by 2047. The structure is 93 ft (28.3 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesJack Tone RD
CrossesCalaveras River
Location0.5 MI N of 8-MILE RD
RouteCounty Highway 0
Coordinates38.06559, -121.15084
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 protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating33.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span26 ft (7.9 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,752 (2013)
Projected traffic3,058 by 2047
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 RD over Calaveras River built?

It was built in 1962, making it 63 years old in 2025.

What condition is Jack Tone RD over Calaveras River 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 February 2025.

How much traffic does Jack Tone RD over Calaveras River carry?

About 2,752 vehicles per day (2013 count), of which roughly 10% are trucks.

How long is Jack Tone RD over Calaveras River?

The structure is 93 ft (28.3 m) long with a longest span of 26 ft (7.9 m) and a deck 32 ft wide.

Who owns Jack Tone RD over Calaveras River?

It is owned by the County Highway Agency.