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County Road 6 over Lake Grandby Buchanan C

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

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

County Road 6 over Lake Grandby Buchanan C in Grand 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 1993, making it 32 years old at the 2025 inventory.
It carries about 478 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 46 of the 88 inventoried bridges in Grand County rated fair (52.3%); 5 (5.7%) 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 125 ft
Location	East End of Lake Granby
NBI structure number	049000609.0025A
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 40 Ml over UP RR	1985	11,000	Fair
US 40 Ml over Fraser River	1985	11,000	Fair
US 40 Ml over Vasquez Creek	1938	11,000	Fair
US 40 Ml over Crooked Creek	1941	11,000	Poor
US 40 Ml over Fraser River	1942	11,000	Fair
US 40 Ml over Pedestrian Underpass	2004	11,000	Good