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County Road 430A over Rio Grande River

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

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

County Road 430A over Rio Grande River in Mineral County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1998, making it 27 years old at the 2025 inventory.
It carries about 26 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 19 of the 26 inventoried bridges in Mineral County rated fair (73.1%); 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	Continuous prestressed concrete stringer or multi-beam girder
Length	about 189 ft
Location	0.4 Mi W of Riverside Mes
NBI structure number	MIN430A-0.4-2A
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 S Fk Rio Grande River	1977	2,900	Fair
US 160 Ml over Pass Creek	1987	2,900	Fair
US160 Ml over Lake Fork	2010	2,900	Good
US 160 Ml over Hillside	1981	2,900	Fair
SH 149 Ml over Willow Creek	1930	1,800	Fair
SH 149 Ml over Rio Grande	1958	1,400	Good