Structure 1364 · Navajo County, AZ

I-40 EB over 8th Avenue

Carries I-40 EB over 8th Avenue, 6.3 Mi W Jct SR 77.

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
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT119 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 8/9

119 ft end to end, longest span 42 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.

Built196957 years old
Length119.1 ft36.3 m
Daily traffic9,620counted 2021
Last inspectedJune 2023every 24 months

Location

StateArizona
CountyNavajo
Location6.3 Mi W Jct SR 77
CarriesI-40 EB
Crosses8th Avenue
Coordinates34.91069, -110.16929

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length119.1 ft (36.3 m)
Max Span42.0 ft (12.8 m)
Deck Width40.7 ft (12.4 m)
Deck Area450.1 sq m
Main Spans3
Year Built1969

Traffic

Avg Daily Traffic9,620 (2021)
Truck Traffic42%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number01364

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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