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Irr Bia Rte N9073 over Upper Bonito Wash

Apache County, Arizona · rated Poor in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Irr Bia Rte N9073 over Upper Bonito Wash in Apache County, Arizona, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 2 (critical condition) on the 0-9 scale.
It was built in 1972, making it 53 years old at the 2025 inventory.
It carries about 400 vehicles a day (traffic count year 2023).
It is one of 16 of the 258 inventoried bridges in Apache County rated poor (6.2%); 16 (6.2%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 49 ft
Location	1.7 Mi NW of Ft Defiance
NBI structure number	00000000000N606
Condition class	Poor

Source: FHWA National Bridge Inventory, 2025 data as reported by the Arizona department of transportation.

Bridge	Built	Vehicles/day	Condition
Irr I 40; EB over Black Creek	1967	25,552	Fair
Irr I 40; EB & WB over Wash	1964	25,270	Good
Irr I 40; EB & WB over Cedar Point Wash	1949	25,270	Good
Irr I 40; EB & WB over Wash	1963	22,521	Good
Irr I 40; EB & WB over Wash	1966	22,224	Fair
Irr I 40; EB & WB over Wash	1962	22,224	Good