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US 550 Ml over Uncomphagre River

Ouray County, Colorado · rated Good in the 2025 National Bridge Inventory

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

US 550 Ml over Uncomphagre River in Ouray County, Colorado, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
It was built in 1989, making it 36 years old at the 2025 inventory.
It carries about 8,300 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 16 of the 39 inventoried bridges in Ouray County rated good (41.0%); 1 (2.6%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous prestressed concrete stringer or multi-beam girder
Length	about 166 ft
Location	8 Mi of Sh62-ridgway
NBI structure number	K-05-BS
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
US 550 Ml over Wild Cat Creek	1995	8,400	Fair
US 550 Ml over Chaffee Gulch	1975	8,300	Good
US 550 Ml over Wildlife Crossing	2011	8,300	Good
US 550 Ml over Cow Creek	1979	8,300	Fair
SH 62 Ml over Uncompahgre River	2013	6,600	Good
US 550 Ml over Cutler Creek	1938	4,800	Fair