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Bridge conditions in La Plata County, Colorado

105 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory

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

The federal inventory lists 105 bridges in La Plata County: 45 rated good, 59 fair, and 1 poor.

1 of the 105 bridges in La Plata County, Colorado, are rated in poor condition (1.0%) in the 2025 National Bridge Inventory, as of August 20, 2026.
45 bridges (42.9%) are rated good and 59 (56.2%) fair.
The median La Plata County bridge was built in 1990.
The busiest poor-rated bridge is County Road 228 over Florida Canal (built 1964), carrying about 1,172 vehicles a day.

Good 42.9% · Fair 56.2% · Poor 1.0% of 105 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
County Road 228 over Florida Canal	1964	1,172	Poor

Busiest bridges in the county

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
Three Springs Blvd over Traverse Wash	2004	12,427	Fair
US 160 Ml over Lightner Creek	1970	12,000	Fair
US 160 Ml over Lightner Creek	1971	12,000	Fair
Private Land Acess over Lightner Creek Ar	1970	12,000	Good

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

All of Colorado: Colorado bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.