Structure 16C0019 · Yuba County, CA

Forty Mile RD over Dry Creek

Carries Forty Mile RD over Dry Creek, 1.0 Mi South Of Dairy RD.

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 overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT110 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

110 ft end to end, longest span 22 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.

Built194878 years old
Length109.9 ft33.5 m
Daily traffic1,630counted 2013
Last inspectedAugust 2024every 24 months

Location

StateCalifornia
CountyYuba
Location1.0 Mi South Of Dairy RD
CarriesForty Mile RD
CrossesDry Creek
Coordinates38.99584, -121.49110

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length109.9 ft (33.5 m)
Max Span22.0 ft (6.7 m)
Deck Width29.9 ft (9.1 m)
Deck Area304.9 sq m
Main Spans5
Year Built1948

Traffic

Avg Daily Traffic1,630 (2013)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number16C0019

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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