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Irr# US 491 Ml over Chimney Rock Draw

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

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

Irr# US 491 Ml over Chimney Rock Draw in Montezuma County, Colorado, 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 1957, making it 68 years old at the 2025 inventory.
It carries about 4,000 vehicles a day (traffic count year 2018).
Its listed owner is the state highway agency.
It is one of 41 of the 60 inventoried bridges in Montezuma County rated fair (68.3%); 5 (8.3%) 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 Colorado department of transportation.

Bridge	Built	Vehicles/day	Condition
Irr# US 160 Ml over Mc Elmo Creek	1958	9,400	Fair
US 160 Ml over Mc Elmo Creek	1969	6,700	Fair
US 160 Ml over Mancos River	1958	6,000	Fair
SH 145 Ml over Dolores River	1972	4,300	Fair
Irr# US 491 Ml over Mancos River	1959	4,000	Fair
Irr# US 491 Ml over Indian Creek	1959	4,000	Fair