Structure H58616B0832 · Graham County, AZ

IRR BIA RTE 8 over Wash

Carries IRR BIA RTE 8 over Wash, 37 Km East Of San Carlos.

Overall conditionFair

Set by its lowest-rated component: Culvert at 6 of 9.

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
25 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 25 ft across with 2 openings. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built197056 years old
Length24.6 ft7.5 m
Daily traffic170counted 2024
Last inspectedJanuary 2024every 24 months

Location

StateArizona
CountyGraham
Location37 Km East Of San Carlos
CarriesIRR BIA RTE 8
CrossesWash
Coordinates33.34822, -110.05653

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length24.6 ft (7.5 m)
Max Span11.8 ft (3.6 m)
Deck Width67.9 ft (20.7 m)
Deck Area155.2 sq m
Main Spans2
Year Built1970

Traffic

Avg Daily Traffic170 (2024)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerBureau of Indian Affairs
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number0000H58616B0832

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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