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County Road 55 over Arkansas River

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

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

County Road 55 over Arkansas River in Lake 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 1986, making it 39 years old at the 2025 inventory.
It carries about 59 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 6 of the 17 inventoried bridges in Lake County rated fair (35.3%); 2 (11.8%) 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 60 ft
Location	0.1 Mi East of SH 24
NBI structure number	LAKE-55-0.1-24A
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 24 Ml over California Gulch	2013	4,600	Good
US 24 Ml over Lake Creek	1993	4,200	Good
US 24 Ml over UP RR	1995	4,200	Good
US 24 Ml over Arkansas River	1995	4,200	Fair
US 24 Ml over Draw	1937	4,000	Fair
US 24 Ml over East Fork Arkansas River	2008	2,700	Good