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County Rd 509 over Dry Creek

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

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

County Rd 509 over Dry Creek in La Plata 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 1990, making it 35 years old at the 2025 inventory.
It carries about 1,028 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 59 of the 105 inventoried bridges in La Plata County rated fair (56.2%); 1 (1.0%) 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	Steel stringer or multi-beam girder
Length	about 51 ft
Location	1.6 Mi SW of Bayfield
NBI structure number	067050903.7043A
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 160 Ml over City St_animas Rvr	1979	35,000	Fair
US 160 Ml over Animas River	1974	30,000	Fair
US 550 Ml over Animas River	1910	28,000	Fair
US 160 Ml over Lightner Creek	1970	19,000	Fair
Private Land Acces over Lightner Creek Ar	1973	19,000	Fair
US 160 Ml over Animas River	1968	17,000	Fair