Structure H68606B0901 · Mohave County, AZ

IRR BIA Route 1 over Dry Run

Carries IRR BIA Route 1 over Dry Run, 26.1km West Of Route 66.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT27 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 27 ft across with 2 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.

Built199531 years old
Length26.9 ft8.2 m
Daily traffic75counted 2023
Last inspectedFebruary 2023every 24 months

Location

StateArizona
CountyMohave
Location26.1km West Of Route 66
CarriesIRR BIA Route 1
CrossesDry Run
Coordinates35.61125, -113.70558

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length26.9 ft (8.2 m)
Max Span11.8 ft (3.6 m)
Deck Width26.9 ft (8.2 m)
Deck Area67.2 sq m
Main Spans2
Year Built1995

Traffic

Avg Daily Traffic75 (2023)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerBureau of Indian Affairs
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number0000H68606B0901

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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