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Nm-104 over Unnamed Waterway

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

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

Nm-104 over Unnamed Waterway in San Miguel 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 1966 and reconstructed in 1985, making it 59 years old at the 2025 inventory.
It carries about 230 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 14 of the 175 inventoried bridges in San Miguel County rated poor (8.0%); 14 (8.0%) 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	Timber stringer or multi-beam girder
Length	about 33 ft
Location	7.1 Mi W of Jct Nm-419
NBI structure number	000000000006922
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Mills AVE. (LV) over Gallinas River	1998	14,679	Good
I-25 Nbl over Agua Sarca Creek	1973	12,084	Fair
I-25 Sbl over Agua Sarca Creek	1973	12,084	Fair
I-25 Nbl/sbl/frntg over Unnamed Waterway	1966	12,084	Fair
I-25 Nbl/sbl over Unnamed Waterway	1973	12,084	Good
I-25 Nbl over I-25 Service Road	1966	10,978	Fair