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Co Road 404 | Palm over Iron Gulch

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

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

Co Road 404 | Palm over Iron Gulch in Douglas County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
It was built in 1995, making it 30 years old at the 2025 inventory.
It carries about 474 vehicles a day (traffic count year 2021).
Its listed owner is the county highway agency.
It is one of 119 of the 264 inventoried bridges in Douglas County rated fair (45.1%); 6 (2.3%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	5	Fair condition

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

Bridge	Built	Vehicles/day	Condition
I 25 Ml over Happy Canyon Creek	1999	116,000	Fair
I 25 Ml over Ridgegate Pkwy	2008	116,000	Fair
I 25 Ml over Clydesdale Ln	1999	116,000	Fair
SH 470 Ml over Willow Creek	1984	95,000	Fair
I 25 Nbnd Ramp over Ramp to County Line Rd R	1983	85,500	Fair
C470 EB Ramp to 25 over Lrt	2005	85,500	Fair