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Nm-186 over Rio Grande

Doña Ana County, New Mexico · rated Fair in the 2025 National Bridge Inventory

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

Nm-186 over Rio Grande in Doña Ana County, New Mexico, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1957, making it 68 years old at the 2025 inventory.
It carries about 977 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 173 of the 261 inventoried bridges in Doña Ana County rated fair (66.3%); 11 (4.2%) 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	Continuous concrete stringer or multi-beam girder
Length	about 481 ft
Location	1.2 Mi E of Jct Nm-28
NBI structure number	000000000005747
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US-70 over Unnamed Waterway	1933	47,762	Fair
US-70 Ebl & Wbl over Roadrunner Parkway	2003	47,762	Fair
US-70 Ebl over Rinconada Road-MP151.9	2003	47,762	Good
US-70 Wbl over Rinconada Road	2003	47,762	Good
US-70 Ebl over Sonoma Ranch Blvd	2003	47,762	Good
US-70 Wbl over Sonoma Ranch Blvd	2003	47,762	Good