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Fdr 504 over Cabin Canyon

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

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

Fdr 504 over Cabin Canyon in Dolores 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 5 (fair 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 27 vehicles a day (traffic count year 2003).
It is one of 20 of the 27 inventoried bridges in Dolores County rated fair (74.1%); 3 (11.1%) 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	Steel stringer or multi-beam girder
Length	about 41 ft
Location	8.2 Mi on Fdr 504
NBI structure number	021301000001140
Condition class	Fair

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 Alkali Creek	1937	3,400	Poor
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