Structure H68601B0236 · Yavapai County, AZ

IRR BIA RTE 105 over Bitter Creek

Carries IRR BIA RTE 105 over Bitter Creek, 0.9 Km NW HWY 89a.

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
23 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 23 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.

Built198046 years old
Length23.3 ft7.1 m
Daily traffic100counted 2024
Last inspectedDecember 2024every 24 months

Location

StateArizona
CountyYavapai
Location0.9 Km NW HWY 89a
CarriesIRR BIA RTE 105
CrossesBitter Creek
Coordinates34.76894, -112.06936

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length23.3 ft (7.1 m)
Max Span11.2 ft (3.4 m)
Deck Width35.1 ft (10.7 m)
Deck Area76.0 sq m
Main Spans2
Year Built1980

Traffic

Avg Daily Traffic100 (2024)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerBureau of Indian Affairs
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number0000H68601B0236

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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