Long Island Viaduct, Road bridge in Quincy Bay, Massachusetts, US
The Long Island Viaduct spans 3,450 feet across Quincy Bay, connecting Moon Island to Long Island through a steel and concrete structure.
The Massachusetts Department of Transportation ordered the permanent closure of the Long Island Viaduct in 2014 due to structural safety concerns.
Throughout its operational years, the viaduct provided access to multiple healthcare facilities, including a hospital for chronically ill patients until 1983.
The bridge measured 30 feet in width and connected to the mainland through a causeway from Moon Island to the Squantum neighborhood in Quincy.
Drivers crossing the bridge experienced distinct tire sounds from the metal grating while viewing the Boston skyline and harbor islands.
Inception: 1950
Official opening: August 4, 1951
GPS coordinates: 42.30840,-70.98200
Latest update: September 23, 2025 16:45
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