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Interstate-91 over Falls Brook

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

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

Interstate-91 over Falls 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 1965, making it 60 years old at the 2025 inventory.
It carries about 108,700 vehicles a day (traffic count year 2019).
Its listed owner is the state 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


Structure	Continuous concrete culvert
Length	about 22 ft
Location	500-ft So. of Smith St Br
NBI structure number	03136
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
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
Interstate-95 over Liberty Street No. 1	1957	59,800	Good