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Irr#co Rd 551 over San Juan River

Archuleta County, Colorado · rated Fair in the 2025 National Bridge Inventory

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

Irr#co Rd 551 over San Juan River in Archuleta County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 2010, making it 15 years old at the 2025 inventory.
It carries about 36 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 33 of the 45 inventoried bridges in Archuleta County rated fair (73.3%); 2 (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


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 150 ft
Location	2.9 Mi E of Camado
NBI structure number	AR551-S0.1-500A
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US160 Ml over Mccabe Creek	2019	16,600	Good
US 160 Ml over San Juan River	1962	8,800	Fair
US 160 Ml over Martinez Creek	1972	8,700	Fair
US 160 Ml over Wildlife Crossing	2022	5,500	Good
Hot Springs Blvd. over San Juan River	1989	5,150	Fair
US 160 Ml over Piedra River	1954	4,300	Fair