Structure N652 · Apache County, AZ

IRR BIA RTE N151 over Cornfields Wash

Carries IRR BIA RTE N151 over Cornfields Wash, 0.5 Mi E Of N15 On N151.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT220 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

220 ft end to end, longest span 73 ft: about 3 semi-trucks nose to tail. Lengths and the semi-truck 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built197551 years old
Length220.1 ft67.1 m
Daily traffic545counted 2023
Last inspectedMarch 2023every 24 months

Location

StateArizona
CountyApache
Location0.5 Mi E Of N15 On N151
CarriesIRR BIA RTE N151
CrossesCornfields Wash
Coordinates35.65322, -109.69417

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length220.1 ft (67.1 m)
Max Span73.2 ft (22.3 m)
Deck Width30.8 ft (9.4 m)
Deck Area630.7 sq m
Main Spans3
Year Built1975

Traffic

Avg Daily Traffic545 (2023)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerBureau of Indian Affairs
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number00000000000N652

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.