Structure 29C0340 · San Joaquin County, CA

Mckinley Road over N Br French Camp Slough

Carries Mckinley Road over N Br French Camp Slough, 1.0 Mi N French Camp/rd.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT69 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

69 ft end to end, longest span 17 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built1923rebuilt 1972
Length68.9 ft21 m
Daily traffic4,300counted 2017
Last inspectedFebruary 2025every 24 months

Location

StateCalifornia
CountySan Joaquin
Location1.0 Mi N French Camp/rd
CarriesMckinley Road
CrossesN Br French Camp Slough
Coordinates37.89907, -121.27067

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length68.9 ft (21 m)
Max Span17.1 ft (5.2 m)
Deck Width35.1 ft (10.7 m)
Deck Area224.7 sq m
Main Spans4
Year Built1923 (reconstructed 1972)

Traffic

Avg Daily Traffic4,300 (2017)
Truck Traffic22%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number29C0340

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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