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US 285 Ml over Alamosa Creek

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

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

US 285 Ml over Alamosa Creek in Conejos County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1959, making it 66 years old at the 2025 inventory.
It carries about 5,200 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 32 of the 63 inventoried bridges in Conejos County rated fair (50.8%); 8 (12.7%) 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

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

Bridge	Built	Vehicles/day	Condition
US 285 Ml over La Jara Creek	1959	5,200	Good
US 285 Ml over Conejos Riv.overflow	1929	3,200	Poor
US 285 Ml over Conejos River	1929	3,200	Fair
SH 15 Ml over La Jara Creek	1938	1,300	Fair
US 285 Ml over Rio San Antonio	1938	1,200	Fair
SH 17 Ml over Br. of Conejos River	1958	960	Fair