Structure 8494 · Maricopa County, AZ

15th Avenue over Grand Canal

Carries 15th Avenue over Grand Canal, 0.38 Mi N Of Indian Schl.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT58 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

58 ft end to end, longest span 21 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.

Built195769 years old
Length58.1 ft17.7 m
Daily traffic23,182counted 2021
Last inspectedJanuary 2024every 12 months

Location

StateArizona
CountyMaricopa
Location0.38 Mi N Of Indian Schl
Carries15th Avenue
CrossesGrand Canal
Coordinates33.50040, -112.09140

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length58.1 ft (17.7 m)
Max Span21.0 ft (6.4 m)
Deck Width54.8 ft (16.7 m)
Deck Area295.6 sq m
Main Spans3
Year Built1957

Traffic

Avg Daily Traffic23,182 (2021)
Truck Traffic1%
Lanes On Bridge3

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 12 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number08494

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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