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I 495 over Water Mill Pond

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

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

I 495 over Water Mill Pond in Middlesex County, Massachusetts, 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 1961 and reconstructed in 1975, making it 64 years old at the 2025 inventory.
It carries about 116,909 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 170 of the 821 inventoried bridges in Middlesex County rated good (20.7%); 91 (11.1%) 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 35 ft
Location	@mm 78.7 1.25 Mi NE Rt 2
NBI structure number	L130251UWDOTNBI
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I 93 over St 60 Eb/salem St	1961	266,500	Fair
I 93 over St 60 Wb/salem St	1961	266,500	Fair
I 93 over Water Mystic River	1963	250,350	Fair
I 93 over Hwy Valley St & Fllswy	1961	210,316	Fair
I 93 over Hwy Montvale Ave	1958	208,231	Fair
I 93 over I 95 /ST128	1957	200,824	Poor