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US 491 Ml over Alkali Creek

Dolores County, Colorado · rated Poor in the 2025 National Bridge Inventory

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

US 491 Ml over Alkali Creek in Dolores County, Colorado, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 4 (poor condition) on the 0-9 scale.
It was built in 1937 and reconstructed in 1960, making it 88 years old at the 2025 inventory.
It carries about 3,400 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 3 of the 27 inventoried bridges in Dolores County rated poor (11.1%); 3 (11.1%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Culvert	4	Poor condition

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

Bridge	Built	Vehicles/day	Condition
US 491 Ml over Dove Creek	1935	4,700	Fair
US 491 Ml over Cross Canyon	1937	3,400	Fair
US 491ML over Sharps Creek	1937	3,400	Fair
US 491 Ml over Draw	1937	3,400	Fair
US 491 Ml over Monument Creek	1958	3,200	Fair
US 491 Ml over Cahone Creek	1937	3,200	Fair