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45-4599 over Irrigation Ditch

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

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

45-4599 over Irrigation Ditch in San Juan 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 deck, rated 4 (poor condition) on the 0-9 scale.
It was built in 1966, making it 59 years old at the 2025 inventory.
It carries about 681 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 10 of the 174 inventoried bridges in San Juan County rated poor (5.7%); 10 (5.7%) 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	Steel stringer or multi-beam girder
Length	about 20 ft
Location	0.23 M N US64 & SJCR4599
NBI structure number	000000000008115
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Nm-516 over Unnamed Waterway	1937	37,626	Fair
Nm-516 over Unnamed Waterway	1937	29,593	Fair
Nm-516 over Unnamed Waterway	1937	22,275	Fair
Nm-516 over Unnamed Waterway	1937	22,275	Fair
Nm-516 over Unnamed Waterway	1937	22,275	Fair
US-64 Ebl/wbl over Unnamed Waterway	1964	21,685	Good