Structure N544 · Apache County, AZ

IRR BIA RTE N13 over Greaswood Wash

Carries IRR BIA RTE N13 over Greaswood Wash, 1 Mi North Lukachukai Az.

Overall conditionFair

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

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT58 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 58 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.

Built1972rebuilt 1993
Length57.7 ft17.6 m
Daily traffic2,400counted 2023
Last inspectedApril 2023every 24 months

Location

StateArizona
CountyApache
Location1 Mi North Lukachukai Az
CarriesIRR BIA RTE N13
CrossesGreaswood Wash
Coordinates36.40928, -109.25469

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length57.7 ft (17.6 m)
Max Span14.4 ft (4.4 m)
Deck Width137.8 ft (42 m)
Deck Area739.2 sq m
Main Spans3
Year Built1972 (reconstructed 1993)

Traffic

Avg Daily Traffic2,400 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerBureau of Indian Affairs
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number00000000000N544

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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