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Fdr 631 over Piedra River

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

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

Fdr 631 over Piedra River in Hinsdale 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 1991, making it 34 years old at the 2025 inventory.
It carries about 533 vehicles a day (traffic count year 2003).
It is one of 25 of the 32 inventoried bridges in Hinsdale County rated fair (78.1%); 0 (0.0%) 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	Prestressed concrete tee beam
Length	about 83 ft
Location	16.4 Mi on Fdr 631
NBI structure number	021306000001169
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
SH 149 Ml over Henson Creek	1954	1,600	Fair
City St. 8 & Half over Lake Fork Gunnison River	1986	980	Fair
Mtn Village Blv over Pedestrian	2019	693	Good
SH 149 Ml over Lake Fk Gunnison River	1954	560	Fair
County Road 30 over Lake Fork Gunnison River	1986	436	Fair
Fdr 631 over Williams Creek	1991	408	Good