Home › Arizona › Navajo County › Irr Bia Rte N6486 over Laguna Creek

Irr Bia Rte N6486 over Laguna Creek

Navajo County, Arizona · rated Fair in the 2025 National Bridge Inventory

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

Irr Bia Rte N6486 over Laguna Creek in Navajo County, Arizona, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1973, making it 52 years old at the 2025 inventory.
It carries about 411 vehicles a day (traffic count year 2023).
It is one of 124 of the 278 inventoried bridges in Navajo County rated fair (44.6%); 6 (2.2%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 65 ft
Location	3 Mi West of Kayenta
NBI structure number	00000000000N308
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I 40 Nfr & Sfr over Wash	1974	24,335	Good
I 40; EB & WB over Wash	1954	24,068	Good
I 40; EB & WB over Wash	1962	23,968	Good
I 40; EB & WB over Wash	1962	23,968	Good
I 40; EB & WB over Wash	1965	23,968	Good
I 40; EB & WB over Wash	1965	23,968	Good