US Bridges

Mckinley Road over N Br French Camp Slough

Fair

San Joaquin County, California · 1.0 MI N French Camp/Rd · Structure no. 29C0340

Built
1923
102 years old, rebuilt 1972
Condition
Fair
inspected February 2025
Type
Slab
Concrete Continuous
Length
69 ft
4 main spans
Daily traffic
4,300
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mckinley Road over N Br French Camp Slough is a concrete continuous slab carrying Mckinley Road over N Br French Camp Slough in San Joaquin County, California. It was built in 1923 and reconstructed in 1972, so it is 102 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 4,300 vehicles a day, roughly 22% of them trucks, projected to reach 3,272 by 2045. The structure is 69 ft (21 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesMckinley Road
CrossesN Br French Camp Slough
Location1.0 MI N French Camp/Rd
RouteCounty Highway 0
Coordinates37.89907, -121.27067
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating46.4 US tons
Inventory rating27.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length69 ft (21 m)
Longest span17 ft (5.2 m)
Deck width35 ft (10.7 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2017)
Projected traffic3,272 by 2045
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Road over N Br French Camp Slough built?

It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1972.

What condition is Mckinley Road over N Br French Camp Slough 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 February 2025.

How much traffic does Mckinley Road over N Br French Camp Slough carry?

About 4,300 vehicles per day (2017 count), of which roughly 22% are trucks.

How long is Mckinley Road over N Br French Camp Slough?

The structure is 69 ft (21 m) long with a longest span of 17 ft (5.2 m) and a deck 35 ft wide.

Who owns Mckinley Road over N Br French Camp Slough?

It is owned by the City or Municipal Highway Agency.