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, collapsed in 1920
Burr long Through truss bridge over Merrimack River
Collapsed

Basiliere Bridge (Essex County, Massachusetts)
Built 1925
Deck plate girder bascule bridge over Merrimack River on Bridge Street (MA-125)
Open to traffic

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)
Original swing bridge built in 1882; after fire 3 new truss spans installed in 1913-14; swing span and 2 northwest trusses replaced in 1952
Lost bascule bridge over Merrimack River on MA 97/MA 113 in Groveland
Demolished and replaced.

BM - Merrimack River Bridge (Hillsborough County, New Hampshire)
Built 1910; Partially blown up for War Effort December 26th, 1942; Remaining spans scrapped October 1943-1944
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 (1888) (Essex County, Massachusetts)
Built 1888
Pratt deck truss bridge over Merrimack River on Boston & Maine RR
Derelict/abandoned

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

BM - Southern Division Merrimack River Bridge (Essex County, Massachusetts)
Lost Double-intersection Warren through truss bridge over Merrimack River on Boston & Maine Railroad
Replaced by a road bridge

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

BM/CM - 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

Boscawen-Canterbury 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

Boscawen-Canterbury Covered Bridge 29-07-31x (Merrimack County, New Hampshire)
Built 1857
Lost Through truss covered bridge over Merrimack River on Depot Street
Lost to flood in 1907

Bridge Street Bridge (Pre 1912) (Middlesex County, Massachusetts)
Lost Through truss bridge over Merrimack River on Bridge Street
Replaced by a new bridge

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

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

Concord Free Bridge (Merrimack County, New Hampshire)
Lost Through truss bridge over Merrimack River on Bridge Street
Replaced by a new bridge

County Bridge (Essex County, Massachusetts)
Built 1906; closed 2002 (walkway open); removed 2004
Lost Parker through truss bridge over Merrimack River on unnamed roadway.
Replaced by a new bridge

Derek Hines Memorial Bridge (1850) (Essex County, Massachusetts)
Built 1850; rehabilitated 1966; replaced 2012
Swing bridge over Merrimack River on Main Street in Amesbury
Replaced by a new bridge

Derek Hines Memorial Bridge (2012) (Essex County, Massachusetts)
Built 2012 to replace previous bridge of same name
Concrete deck girder bridge over Merrimack River on Merrill Street
Open to traffic

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

Federal Bridge (Merrimack County, New Hampshire)
Built 1915
Lost Through truss bridge over Merrimack River on US 4
Replaced by a new bridge

Franklin Pierce University Suspension Bridge (Hillsborough County, New Hampshire)
Abandoned wire suspension bridge over Merrimack River Back Channel in Manchester
Derelict/abandoned. Main span mostly intact but backspans completely missing. Deck mostly collapsed.

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

Hands Across the Merrimack Footbridge (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

Haverhill Bridge (Essex County, Massachusetts)
Built 1873
Lost Deck truss bridge over Merrimack River on S Main Street
Replaced by a new bridge

Hooksett Covered Bridge 29-07-60x (Merrimack County, New Hampshire)
Built 1859
Lost Town Lattice through truss covered bridge over Merrimack River on road
Replaced by a new bridge

Hooksett Memorial Bridge (Merrimack County, New Hampshire)
Built 1976 to replace/bypass Lilac Bridge
Steel stringer bridge over Merrimack River on Main Street
Open to traffic

Hunts Falls Bridge (Middlesex County, Massachusetts)
Built 1954; rehabilitated 2012
Deck plate girder bridge over Merrimack River on Nesmith Street
Open to traffic

Island Avenue Canal Bridge (Essex County, Massachusetts)
Built 2012
Modern polygonal Warren pony truss bridge with alternating verticals over North Canal on Island Avenue
Open to traffic

Island Road Bridge (Middlesex County, Massachusetts)
Lost pony truss bridge over Tributary of Merrimack River on Island Road
Replaced by a new bridge

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

John Greenleaf Whittier Bridge (1951) (Essex County, Massachusetts)
Built 1951, closed 2016, demolished 2017
Through arch bridge over Merrimack River on I-95 in Amesbury
Replaced by a new bridge

John Greenleaf Whittier Bridge (2018) (Essex County, Massachusetts)
Built 2017-2018
Network tied arch bridge over Merrimack River on Interstate 95
Open to traffic

Joseph W. Casey Bridge (Essex County, Massachusetts)
Built 1918; rehabilitated 1982
Concrete deck arch bridge over Merrimack River on MA-114
Open to traffic

Lilac Bridge (Merrimack County, New Hampshire)
Built 1909; South span destroyed & replaced 1936; Bypassed in 1976; demolished July 2017
Lost through truss bridge over Merrimack River in Hooksett
Superstructure replaced with new modern truss footbridge reusing original piers

Lower Covered Bridge 29-07-41-2x (Merrimack County, New Hampshire)
Built 1891
Lost Town lattice truss covered bridge over Merrimack River on Manchester Street
Replaced by a new bridge

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

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

Notre Dame Bridge (current) (Hillsborough County, New Hampshire)
Original span built 1988 to replace previous arch bridge. Twin span built 1990
Steel stringer bridge over Merrimack River, Everett Turnpike, and Various Local Streets on Bridge Street
Open to traffic

O'Reilly Memorial Bridge (Essex County, Massachusetts)
Built 1962
Steel stringer bridge over Merrimack River on Interstate 495 (Boston Outer Beltway)
Open to traffic

Pacific Mills Canal Bridge #2 (Essex County, Massachusetts)
Polygonal Warren pony truss with alternating verticals bridge over North Canal on Access Road
Open to traffic

Pembroke Bridge (Merrimack County, New Hampshire)
Built 1915
Lost Pratt through truss bridge over Merrimack River on Manchester Street
Replaced by a new bridge

Queen City 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

Richard P. Howe Bridge (Middlesex County, Massachusetts)
Built 2014
Deck truss bridge over Merrimack River & Canal on University Avenue
Open to traffic

Rocks Village Bridge (Essex County, Massachusetts)
Built 1883; Additional spans built 1895 & 1914; Rehabilitated with full bridge closure 2013-2014; Damaged by overheight truck and closed indefinitely 2022
Through truss swing bridge over Merrimack River on E. Main Street/Bridge Street
Closed indefinitely due to damage from overheight truck

Rourke Bridge (1983) (Middlesex County, Massachusetts)
Built 1983 as a temporary bridge but never replaced by permenant structure
Bailey pony truss over Merrimack River on Wood Street
Open to traffic with a weight limit

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 & replaced by UCEB in 2015
Through truss bridge over Merrimack River on Sewalls Falls Road
Demolished and replaced

South Union Street Bridge (Essex County, Massachusetts)
Built 1939 to replace previous bridge of unknown design dating to 1860
Concrete tee beam bridge over North Canal on South Union Street
Open to traffic

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 Ferry Street
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

The Crossroads Bridge (Merrimack County, New Hampshire)
Twin span bridge built 1976; SB bridge rehabiliated 2011; NB bridge rehabilitated 2013
Steel stringer bridge over Merrimack River & Railroad on Interstate 93 (Alan B. Shepard Highway)
Open to traffic

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

Tyngsborough Bridge (Old) (Middlesex County, Massachusetts)
Built 1893; replaced 1930
Lost Whipple deck truss bridge over Merrimack River on Frost Road
Replaced by a new bridge

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.