Structure 38C0258 · Stanislaus County, CA

Cooperstown Road over Johnson Creek

Carries Cooperstown Road over Johnson Creek, 1.5 Mi NW La Grange RD.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT33 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

33 ft end to end, longest span 15 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 tee-beam bridge.

Built1922104 years old
Length33.1 ft10.1 m
Daily traffic35counted 2007
Last inspectedSeptember 2023every 24 months

Location

StateCalifornia
CountyStanislaus
Location1.5 Mi NW La Grange RD
CarriesCooperstown Road
CrossesJohnson Creek
Coordinates37.69545, -120.49060

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length33.1 ft (10.1 m)
Max Span15.4 ft (4.7 m)
Deck Width22.0 ft (6.7 m)
Deck Area67.7 sq m
Main Spans2
Year Built1922

Traffic

Avg Daily Traffic35 (2007)
Truck Traffic26%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number38C0258

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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