Structure 2020 · Coconino County, AZ

I 40; WB over Flagstaff Ranch RD

Carries I 40; WB over Flagstaff Ranch RD, 2.9 Mi W Jct I-17.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT160 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

160 ft end to end: about 2 semi-trucks nose to tail. Lengths and the semi-truck 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 box-beam bridge.

Built198640 years old
Length160.1 ft48.8 m
Daily traffic10,819counted 2024
Last inspectedJuly 2024every 24 months

Location

StateArizona
CountyCoconino
Location2.9 Mi W Jct I-17
CarriesI 40; WB
CrossesFlagstaff Ranch RD
Coordinates35.18610, -111.70990

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Single/Spread
Total Length160.1 ft (48.8 m)
Max Span154.9 ft (47.2 m)
Deck Width45.3 ft (13.8 m)
Deck Area673.4 sq m
Main Spans1
Year Built1986

Traffic

Avg Daily Traffic10,819 (2024)
Truck Traffic18%
Lanes On Bridge2
Lanes Under Bridge5

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number02020

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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