Home › Colorado › Larimer County › I 25 Ml Nbnd over Big Thompson River

I 25 Ml Nbnd over Big Thompson River

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

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

I 25 Ml Nbnd over Big Thompson River in Larimer 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 7 (good condition) on the 0-9 scale.
It was built in 2021, making it 4 years old at the 2025 inventory.
It carries about 34,000 vehicles a day (traffic count year 2011).
Its listed owner is the state highway agency.
It is one of 275 of the 562 inventoried bridges in Larimer County rated good (48.9%); 12 (2.1%) 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	Continuous prestressed concrete single box beam
Length	about 283 ft
Location	1.3 Mi N of Jct SH 402
NBI structure number	C-17-BMA
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I25 Ml Nbnd over Poudre River Floodplain	2022	90,000	Good
I25 Ml Sbnd over Poudre River Floodplain	2023	90,000	Good
I 25 Ml over Hillsboro Tributary	2020	86,000	Good
I 25 Ml Nbnd over County Road 16	2022	86,000	Good
I 25 Ml Sbnd over County Road 16	2023	86,000	Good
SH 402 Ml over I25 Ml	2020	86,000	Good