US Bridges

Mckinley RD over French Camp Slough

Good

San Joaquin County, California · 0.3 MI NE French Camp RD · Structure no. 29C0033

Built
1970
55 years old
Condition
Good
inspected February 2025
Type
Slab
Concrete Continuous
Length
108 ft
4 main spans
Daily traffic
3,303
2017 count
Owner
County
County Highway Agency

About this bridge

Mckinley RD over French Camp Slough is a concrete continuous slab carrying Mckinley RD over French Camp Slough in San Joaquin 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 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 3,303 vehicles a day, roughly 2% of them trucks, projected to reach 3,272 by 2045. The structure is 108 ft (32.9 m) long and 41 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMckinley RD
CrossesFrench Camp Slough
Location0.3 MI NE French Camp RD
RouteCounty Highway 0
Coordinates37.8887, -121.26893
Functional classRural Local

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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.5 US tons
Inventory rating30.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length108 ft (32.9 m)
Longest span26 ft (7.9 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,303 (2017)
Projected traffic3,272 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Mckinley RD over French Camp Slough built?

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

What condition is Mckinley RD over French Camp Slough 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 Mckinley RD over French Camp Slough carry?

About 3,303 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Mckinley RD over French Camp Slough?

The structure is 108 ft (32.9 m) long with a longest span of 26 ft (7.9 m) and a deck 41 ft wide.

Who owns Mckinley RD over French Camp Slough?

It is owned by the County Highway Agency.