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Mill Street over Long Hill Brook

Middlesex County, Connecticut · rated Good in the 2025 National Bridge Inventory

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

Mill Street over Long Hill Brook in Middlesex County, Connecticut, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
It was built in 2001, making it 24 years old at the 2025 inventory.
It carries about 1,605 vehicles a day (traffic count year 2024).
Its listed owner is a city or municipal highway agency.
It is one of 100 of the 309 inventoried bridges in Middlesex County rated good (32.4%); 13 (4.2%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	7	Good condition

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

Bridge	Built	Vehicles/day	Condition
Interstate-91 over Falls Brook	1965	108,700	Good
Interstate-91 NB over Mattabesset River	1965	99,500	Fair
Interstate-95 over Cow Hill Road	1957	62,400	Fair
Interstate-95 over Route 9 NB & I-95 Tr 816	1992	62,200	Fair
Route 9 over Game Area Road	1968	61,300	Good
Interstate-95 over Indian Lake	1957	59,800	Fair