Merrimack River

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Aiken Street Bridge (Middlesex County, Massachusetts)
Built 1883 by the Berlin Iron Bridge Co.; Rehabilitated 1998
Five-span lenticular through truss bridge over Merrimack River on Aiken Street in Lowell
Open to traffic

Amoskeag Falls Bridge 29-06-20x (Hillsborough County, New Hampshire)
Built 1854
Burr long Through truss bridge over Merrimack River
Collapsed

B&M/C&M - Turkey Falls Bridge (Merrimack County, New Hampshire)
Built 1912
Lost Through truss bridge over Merrimack River on B&MRR
Removed but not replaced

B&M/C&M - Turkey Falls Covered Bridge (Merrimack County, New Hampshire)
Built ca. 1903; Replaced 1912
Lost Through truss bridge over Merrimack River on Boston & Maine Railroad & Concord & Manchester Electric Railway
Replaced by a new bridge

Bates Bridge (New) (Essex County, Massachusetts)
Built 2014
Deck plate girder bridge over Merrimack River on MA Route 97/113
Open to traffic

Bates Bridge (Old) (Essex County, Massachusetts)
Built 1914; rehabilitated 1951
Bascule bridge over Merrimack River on MA 97/MA 113 in Groveland
Demolished and replaced.

BM - Merrimack River Bridge (Essex County, Massachusetts)
Built 1888
Pratt deck truss bridge over Merrimack River on Boston & Maine RR
Derelict/abandoned

BM - Merrimack River Bridge (Hillsborough County, New Hampshire)
Lost Warren through truss with sub-panels bridge over Merrimack River on B&M WN&P Division
Removed but not replaced

BM - Merrimack River Bridge (Haverhill) (Essex County, Massachusetts)
Built 1880 by the Phoenix Bridge Co.; replaced by present structure 1919
Lost Whipple through truss bridge over Merrimack River on B&M Western Route
Replaced by a new bridge

Bridge Street Bridge (Middlesex County, Massachusetts)
Built 1937
Through truss bridge over Merrimack River on Bridge Street in Lowell
Open to traffic

Bridge Street Bridge (Old) (Middlesex County, Massachusetts)
Lost Through truss bridge over Merrimack River on Bridge Street
Replaced by a new bridge

Chain Bridge (Old) (Essex County, Massachusetts)
Built 1810; replaced 1909
Lost Wire suspension bridge over Merrimack River on Main Street/Trolley
Replaced by a new bridge

Depot Street Bridge (Merrimack County, New Hampshire)
Built 1907, Closed in 1965; Demolished 2014
Through truss bridge over Merrimack River on Old Canterbury Road in Boscawen
Removed but not replaced

Duck Bridge (Essex County, Massachusetts)
Built 1888 by the Boston Bridge Works
Five-span through truss bridge over Merrimack River on Union Street in Lawrence
Open to traffic

Essex-Merrimac Bridge (Essex County, Massachusetts)
Built 1909; rehabilitated 2003
Suspension bridge over Merrimack River on Main Street in Amesbury
Open to traffic

Lilac Bridge (Merrimack County, New Hampshire)
Built 1909; South span destroyed & replaced 1936; Bypassed in 1976; demolished July 2017
Bypassed through truss bridge over Merrimack River in Hooksett
Removed but not replaced

MBTA - Merrimack River Bridge (Essex County, Massachusetts)
Built 1893
Warren deck truss bridge over Merrimack River on Railroad (MBTA)
Abandoned

MBTA - Merrimack River Bridge (Haverhill) (Essex County, Massachusetts)
Built 1919
Warren through truss bridge over Merrimack River on MBTA Haverhill Line
Open to traffic

Merrimack River Bridge (Essex County, Massachusetts)
Built 1850; rehabilitated 1966
Swing bridge over Merrimack River on Main Street in Amesbury
Open to traffic

Merrimack River Bridge (Essex County, Massachusetts)
Built 1976
Bascule bridge over Merrimack River on US 1 (Bridge Road) in Newburyport
Open to traffic

Merrimack River Bridge (Hillsborough County, New Hampshire)
Built 1923; rehabilitated 1995
Deck truss bridge over Merrimack River on US 3/NH 3A in Manchester
Open to traffic

NEGS - Merrimack River Bridge (Merrimack County, New Hampshire)
Warren through truss with all verticals bridge over Merrimack River on New England Southern Railroad
Open to traffic

Piscataquog Trail - Merrimack River Bridge (Hillsborough County, New Hampshire)
Warren deck truss with all verticals bridge over Merrimack River & Everett Turnpike (NH 3A/I-293) on Piscataquog Trail
Open to pedestrians only

Sagamore Bridge (Hillsborough County, New Hampshire)
Replaced 1973
Lost Closed-spandrel arch bridge over Merrimack River on Lowell Road
Replaced by a new bridge

Sewalls Falls Road Bridge (Merrimack County, New Hampshire)
Built 1915; rehabilitated 1936; Demolished in 2015-16
Through truss bridge over Merrimack River on Sewalls Falls Road
Truss structure removed. Replacement underway

ST - Merrimack River Bridge (Hooksett) (Merrimack County, New Hampshire)
Warren through truss with sub-panels bridge over Merrimack River on Pan Am Railways
Open to traffic

ST - Merrimack River Bridge (Manchester) (Hillsborough County, New Hampshire)
Warren through truss with sub-panels bridge over Merrimack River on Pan Am Railways
Open to traffic

Taylor Falls Arch Bridge (Hillsborough County, New Hampshire)
Built 1911; Replaced ca. 1973
Lost Closed-spandrel arch bridge over Merrimack River on Road
Replaced by a new bridge

Taylor Falls Iron Bridge (Hillsborough County, New Hampshire)
Built 1882 by Corrugated Metal Co.; Replaced 1911
Lost Lenticular through truss bridge over Merrimack River on Road
Replaced by a new bridge

Tyngsborough Bridge (Middlesex County, Massachusetts)
Built 1931 by the Boston Bridge Works; rehabilitated 1975 and 2012
Steel through arch bridge over Merrimack River on MA 113/MA 3A in Tyngsborough
Open to traffic

University Avenue Bridge (Middlesex County, Massachusetts)
Built 1895 by Groton Bridge Co.; Rehabilitated 1965; Demolished 2014
Lost deck truss bridge over Merrimack River on University Avenue in Lowell
Demolished and replaced.

Whittier Bridge (Essex County, Massachusetts)
Built 1951
Through arch bridge over Merrimack River on I-95 in Amesbury
Open to traffic