Structure 8306 · Pima County, AZ

Old Nogales HWY over Small Wash

Carries Old Nogales HWY over Small Wash, 1.4 Mi S Jct Nogales HWY.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT95 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

95 ft end to end, longest span 32 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 tee-beam bridge.

Built1900rebuilt 1938
Length95.1 ft29 m
Daily traffic6,995counted 2023
Last inspectedAugust 2023every 24 months

Location

StateArizona
CountyPima
Location1.4 Mi S Jct Nogales HWY
CarriesOld Nogales HWY
CrossesSmall Wash
Coordinates31.90720, -110.96090

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length95.1 ft (29 m)
Max Span32.2 ft (9.8 m)
Deck Width38.4 ft (11.7 m)
Deck Area339.3 sq m
Main Spans3
Year Built1900 (reconstructed 1938)

Traffic

Avg Daily Traffic6,995 (2023)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number08306

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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