Structure 29C0052 · San Joaquin County, CA

Thornton Road over Mosher Slough

Carries Thornton Road over Mosher Slough, S Davis RD In Tx.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT54 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

54 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.

Built1931rebuilt 1970
Length54.1 ft16.5 m
Daily traffic26,616counted 2013
Last inspectedJanuary 2024every 24 months

Location

StateCalifornia
CountySan Joaquin
LocationS Davis RD In Tx
CarriesThornton Road
CrossesMosher Slough
Coordinates38.02822, -121.33149

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length54.1 ft (16.5 m)
Max Span17.4 ft (5.3 m)
Deck Width106.6 ft (32.5 m)
Deck Area536.2 sq m
Main Spans3
Year Built1931 (reconstructed 1970)

Traffic

Avg Daily Traffic26,616 (2013)
Truck Traffic2%
Lanes On Bridge5

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number29C0052

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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