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Irr Bia Rte 4 over Zuni River

McKinley County, New Mexico · rated Good in the 2025 National Bridge Inventory

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

Irr Bia Rte 4 over Zuni River in McKinley County, New Mexico, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
It was built in 1976, making it 49 years old at the 2025 inventory.
It carries about 3,000 vehicles a day (traffic count year 2023).
It is one of 109 of the 289 inventoried bridges in McKinley County rated good (37.7%); 23 (8.0%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 182 ft
Location	.5 Km No. Jct Hwy 53 & 4
NBI structure number	00000000000M413
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-40 Wbl over BNSF R/R Spur	1980	31,569	Fair
I-40 Ebl over BNSF R/R Spur	1980	31,569	Fair
I-40 Ebl over Third Street	1980	31,569	Fair
I-40 WB over Third Street	1980	31,569	Fair
I-40 WB over Second Street	1980	31,569	Fair
I-40 Ebl over Second Street	1980	31,569	Fair