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Interstate 84 WB over Rte 8 Naug Riv M-n RR

New Haven County, Connecticut · rated Poor in the 2025 National Bridge Inventory

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

Interstate 84 WB over Rte 8 Naug Riv M-n RR in New Haven County, Connecticut, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
It was built in 1967 and reconstructed in 1991, making it 58 years old at the 2025 inventory.
It carries about 33,600 vehicles a day (traffic count year 2021).
Its listed owner is the state highway agency.
It is one of 33 of the 893 inventoried bridges in New Haven County rated poor (3.7%); 33 (3.7%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Continuous steel girder and floorbeam
Length	about 2,460 ft
Location	Waterbury Lower Level
NBI structure number	03191B
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Interstate 95 over Canal Dock Road	2015	187,800	Good
Interstate-95 over West River & SR 745	2018	142,200	Good
Route 71 over Sodom Brook	2019	141,900	Good
Interstate-91 over I-91 Ramp 002	1965	141,200	Fair
Interstate-91&rt15 over Willow Brook	1964	136,800	Fair
Interstate-91 over Grand Avenue	1965	135,400	Fair