Structure 38 0012 · Stanislaus County, CA

State Route 108 over M.i.d. Main Canal

Carries State Route 108 over M.i.d. Main Canal, 10-sta-108-30.50.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT53 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

53 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.

Built1915rebuilt 1994
Length53.1 ft16.2 m
Daily traffic20,200counted 2009
Last inspectedDecember 2023every 24 months

Location

StateCalifornia
CountyStanislaus
Location10-sta-108-30.50
CarriesState Route 108
CrossesM.i.d. Main Canal
Coordinates37.73267, -120.96872

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length53.1 ft (16.2 m)
Max Span16.7 ft (5.1 m)
Deck Width43.6 ft (13.3 m)
Deck Area215.5 sq m
Main Spans3
Year Built1915 (reconstructed 1994)

Traffic

Avg Daily Traffic20,200 (2009)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number38 0012

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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