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Nm-406 over Road Canyon Draw

Union County, New Mexico · rated Poor in the 2025 National Bridge Inventory

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

Nm-406 over Road Canyon Draw in Union County, New Mexico, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1957, making it 68 years old at the 2025 inventory.
It carries about 60 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 1 of the 68 inventoried bridges in Union County rated poor (1.5%); 1 (1.5%) 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 concrete stringer or multi-beam girder
Length	about 163 ft
Location	4.2 Mi S of Jct Nm-456
NBI structure number	000000000005748
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
US-87 over Unnamed Waterway	1961	6,226	Good
US-87 over Unnamed Waterway	1961	6,226	Good
US-64 over Unnamed Waterway	1937	5,229	Good
US-64 over Unnamed Waterway	1937	5,229	Good
US-64 over Unnamed Waterway	1937	5,229	Fair
US-64/87 Ebl/wbl over Unnamed Waterway	1959	4,234	Good