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I 25 Ml Nbnd over N.poudre Ditch Sand Crk

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

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

I 25 Ml Nbnd over N.poudre Ditch Sand Crk in Larimer 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 1950, making it 75 years old at the 2025 inventory.
It carries about 12,500 vehicles a day (traffic count year 2020).
Its listed owner is the state highway agency.
It is one of 275 of the 562 inventoried bridges in Larimer County rated fair (48.9%); 12 (2.1%) 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	Steel stringer or multi-beam girder
Length	about 48 ft
Location	11.6 Mi North of Jct SH 1
NBI structure number	A-17-S
Condition class	Fair

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