US-1 Over Mystic River, Little Mystic Channel, and Various Roads in Boston and Chelsea: Suffolk County, Massachusetts, United States
Metal Cantilever 22 Panel Rivet-Connected Warren Through Truss, Fixed and Approach Spans: Metal 12 Panel Rivet-Connected Warren Through Truss, Fixed
Length: 11,906 ft.
Main Span: 800 ft.
Roadway: 36 ft.
Main Spans: 3
Built 1950
By: Bethlehem Steel Company of Bethlehem, Pennsylvania
and John Edwin Greiner (J. E. Greiner Company of Baltimore, Maryland and Chicago, Illinois)