Structure 22C0079 · Yolo County, CA

County Road 31 over Dry Slough

Carries County Road 31 over Dry Slough, Just East Of C.r. #95.

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 overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT87 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

87 ft end to end, longest span 28 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.

Built1959rebuilt 1977
Length86.9 ft26.5 m
Daily traffic5,083counted 2012
Last inspectedNovember 2023every 24 months

Location

StateCalifornia
CountyYolo
LocationJust East Of C.r. #95
CarriesCounty Road 31
CrossesDry Slough
Coordinates38.56152, -121.85665

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length86.9 ft (26.5 m)
Max Span27.9 ft (8.5 m)
Deck Width40.7 ft (12.4 m)
Deck Area328.6 sq m
Main Spans3
Year Built1959 (reconstructed 1977)

Traffic

Avg Daily Traffic5,083 (2012)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number22C0079

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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