Boston & Lowell Railroad

Reporting mark: B&L
BM - Atlantic Mills Bridge (Essex County, Massachusetts)
Lost Warren through truss bridge over North Canal on Boston & Maine Railroad
Removed

BM - Southern Division Station Bridge (Essex County, Massachusetts)
Lost Pratt through truss bridge over North Canal on Boston & Maine Railroad
Removed

MBTA - Concord River Bridge (Middlesex County, Massachusetts)
Built 1832; extensively modified and encased in concrete 1908; timber trestle added 1931
Stone arch bridge over Concord River on MBTA Lowell Line
Open to traffic

MBTA - Mystic River Bridge (Middlesex County, Massachusetts)
Built 1835, extensively modified 1906
Closed-spandrel arch bridge over Mystic River on MBTA Lowell Line
Open to traffic