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US 40 Ml over Mt Werner Road

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

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

US 40 Ml over Mt Werner Road in Routt 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 1980, making it 45 years old at the 2025 inventory.
It carries about 23,000 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 48 of the 97 inventoried bridges in Routt County rated fair (49.5%); 7 (7.2%) 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 concrete tee beam
Length	about 150 ft
Location	In Steamboat Springs
NBI structure number	C-09-AS
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 40 Ml over Fish Creek	1980	28,000	Fair
US 40 Ml over Walton Creek	1990	9,200	Fair
US 40 Ml over Shelton Ditch	1954	6,400	Poor
Fish Crk Falls Rd over Spring Creek	1973	5,949	Fair
US 40 Ml over E Fork Elk River	2013	5,700	Good
US 40 Ml over Sage Creek	2015	5,100	Good