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Nm-456 over Dry Cimarron

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

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

Nm-456 over Dry Cimarron in Union 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 deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1979, making it 46 years old at the 2025 inventory.
It carries about 73 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 37 of the 68 inventoried bridges in Union County rated good (54.4%); 1 (1.5%) 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	Continuous prestressed concrete stringer or multi-beam girder
Length	about 162 ft
Location	20.4 Mi NE of Jct Nm-325
NBI structure number	000000000007944
Condition class	Good

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