Structure 1069 · Pinal County, AZ

I-8 WB over Smith Road

Carries I-8 WB over Smith Road, 5.9 Mi E Jct SR 84.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT90 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

90 ft end to end, longest span 33 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.

Built196264 years old
Length89.9 ft27.4 m
Daily traffic2,227counted 2023
Last inspectedFebruary 2024every 24 months

Location

StateArizona
CountyPinal
Location5.9 Mi E Jct SR 84
CarriesI-8 WB
CrossesSmith Road
Coordinates32.83090, -112.03250

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length89.9 ft (27.4 m)
Max Span33.1 ft (10.1 m)
Deck Width43.3 ft (13.2 m)
Deck Area361.7 sq m
Main Spans3
Year Built1962

Traffic

Avg Daily Traffic2,227 (2023)
Truck Traffic17%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number01069

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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