Structure 38 0039 · Stanislaus County, CA

State Route 4 over Duck Creek

Carries State Route 4 over Duck Creek, 10-sta-004-0.88.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
23 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

23 ft end to end, longest span 10 ft. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built1920rebuilt 1974
Length23.0 ft7 m
Daily traffic4,900counted 2015
Last inspectedMarch 2024every 24 months

Location

StateCalifornia
CountyStanislaus
Location10-sta-004-0.88
CarriesState Route 4
CrossesDuck Creek
Coordinates37.94483, -120.90982

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length23.0 ft (7 m)
Max Span9.8 ft (3 m)
Deck Width32.8 ft (10 m)
Deck Area70 sq m
Main Spans2
Year Built1920 (reconstructed 1974)

Traffic

Avg Daily Traffic4,900 (2015)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number38 0039

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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