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45z004 over Unnamed Waterway

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

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

45z004 over Unnamed Waterway in San Juan 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 deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1952, making it 73 years old at the 2025 inventory.
It carries about 3,922 vehicles a day (traffic count year 2023).
Its listed owner is a city or municipal highway agency.
It is one of 104 of the 174 inventoried bridges in San Juan County rated fair (59.8%); 10 (5.7%) 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	Prestressed concrete multiple box beam
Length	about 46 ft
Location	0.45 Mi West Jct US 550
NBI structure number	000000000003520
Condition class	Fair

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