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I 25 Ml over Upper Lake Gulch Rd

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

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

I 25 Ml over Upper Lake Gulch Rd in Douglas County, Colorado, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
It was built in 2021, making it 4 years old at the 2025 inventory.
It carries about 66,000 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 139 of the 264 inventoried bridges in Douglas County rated good (52.7%); 6 (2.3%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 67 ft
Location	1.0 Mi N of Larkspur
NBI structure number	H-17-CT
Condition class	Good

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