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Irr/us-550 over Unnamed Waterway

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

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

Irr/us-550 over Unnamed Waterway in Sandoval 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 culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1978, making it 47 years old at the 2025 inventory.
It carries about 5,662 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 110 of the 180 inventoried bridges in Sandoval County rated fair (61.1%); 8 (4.4%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition

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

Bridge	Built	Vehicles/day	Condition
US-550 over Irrigation Ditch	1938	91,260	Good
US-550 Sbl over Rio Grande River	1986	91,260	Fair
US-550 Sbl over Rio Grande	1986	91,260	Fair
I-25 Nbl/sbl over Unnamed Waterway	1954	70,705	Fair
I-25 NBL and SBL over Sandia wash	2011	70,705	Fair
I-25 Nbl/sbl over Unnamed Waterway	1954	59,841	Fair