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Tr 01 Fas 166 over Mill Brook

Windsor County, Vermont · rated Good in the 2025 National Bridge Inventory

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

Tr 01 Fas 166 over Mill Brook in Windsor County, Vermont, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 7 (good condition) on the 0-9 scale.
It was built in 1948 and reconstructed in 1996, making it 77 years old at the 2025 inventory.
It carries about 390 vehicles a day (traffic count year 2017).
Its listed owner is a town or township highway agency.
It is one of 216 of the 483 inventoried bridges in Windsor County rated good (44.7%); 26 (5.4%) 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	Steel stringer or multi-beam girder
Length	about 54 ft
Location	3.3 Mi W Jct. VT.14
NBI structure number	200166001714132
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I 00089 Ml over I 89 over Th No 78	1965	42,000	Good
I 00091 Ml over I 91 over US 5	2015	31,000	Good
I 00091 Ml over I 91 over US 5	2015	31,000	Good
I 00089 Ml over I 89 over Th No 46	1967	26,000	Good
I 00089 Ml over I 89 over US 5	1966	26,000	Fair
I 00089 Ml over I 89 over US 5	1966	26,000	Fair