Structure 6775 · Coconino County, AZ

SR 179 over Morgans Wash

Carries SR 179 over Morgans Wash, 13.4 Mi N Jct I-17.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT40 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 40 ft across with 3 openings. 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, so those are drawn as typical for a culvert.

Built1986rebuilt 2008
Length40.0 ft12.2 m
Daily traffic13,108counted 2019
Last inspectedJuly 2021every 48 months

Location

StateArizona
CountyCoconino
Location13.4 Mi N Jct I-17
CarriesSR 179
CrossesMorgans Wash
Coordinates34.85274, -111.76451

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length40.0 ft (12.2 m)
Max Span12.1 ft (3.7 m)
Deck Area205.0 sq m
Main Spans3
Year Built1986 (reconstructed 2008)

Traffic

Avg Daily Traffic13,108 (2019)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2021
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number06775

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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