Structure 9943 · Pima County, AZ

Silverbell Road over Wash

Carries Silverbell Road over Wash, 0.31 Mi N Of Grant RD.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT64 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 64 ft across with 5 openings. 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, so those are drawn as typical for a culvert.

Built1987rebuilt 2015
Length64.0 ft19.5 m
Daily traffic10,053counted 2020
Last inspectedAugust 2021every 48 months

Location

StateArizona
CountyPima
Location0.31 Mi N Of Grant RD
CarriesSilverbell Road
CrossesWash
Coordinates32.25530, -111.01630

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length64.0 ft (19.5 m)
Max Span12.1 ft (3.7 m)
Deck Area261.3 sq m
Main Spans5
Year Built1987 (reconstructed 2015)

Traffic

Avg Daily Traffic10,053 (2020)
Truck Traffic10%
Lanes On Bridge4

Inspection & Ownership

Last InspectionAugust 2021
Inspection FrequencyEvery 48 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number09943

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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