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SH 300 Ml 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

SH 300 Ml 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 5 (fair condition) on the 0-9 scale.
It was built in 1939, making it 86 years old at the 2025 inventory.
It carries about 1,600 vehicles a day (traffic count year 2020).
Its listed owner is the state 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	Timber stringer or multi-beam girder
Length	about 159 ft
Location	0.4 Mi E of Jct SH 24 Mal
NBI structure number	H-11-AA
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