Merrimack River
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Aiken Street Bridge (Middlesex County, Massachusetts)
Built 1883 by the Berlin Iron Bridge Co.; Rehabilitated 1998Five-span lenticular through truss bridge over Merrimack River on Aiken Street in LowellOpen to traffic
Amoskeag Falls Bridge 29-06-20x (Hillsborough County, New Hampshire)
Built 1854, collapsed in 1920Burr long Through truss bridge over Merrimack RiverCollapsed
Basiliere Bridge (Essex County, Massachusetts)
Built 1925Deck plate girder bascule bridge over Merrimack River on Bridge Street (MA-125)Open to traffic
Bates Bridge (New) (Essex County, Massachusetts)
Built 2014Deck plate girder bridge over Merrimack River on MA Route 97/113Open 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 1952Lost bascule bridge over Merrimack River on MA 97/MA 113 in GrovelandDemolished 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 1943-1944Lost Warren through truss with sub-panels bridge over Merrimack River on B&M WN&P DivisionRemoved but not replaced
BM - Merrimack River Bridge (Haverhill) (Essex County, Massachusetts)
Built 1880 by the Phoenix Bridge Co.; replaced by present structure 1919Lost Whipple through truss bridge over Merrimack River on B&M Western RouteReplaced by a new bridge
BM - Turkey Falls Bridge (Merrimack County, New Hampshire)
Built 1912Lost Through truss bridge over Merrimack River on B&MRRRemoved but not replaced
BM/CM - Turkey Falls Covered Bridge (Merrimack County, New Hampshire)
Built ca. 1903; Replaced 1912Lost Through truss bridge over Merrimack River on Boston & Maine Railroad & Concord & Manchester Electric RailwayReplaced by a new bridge
Boscawen-Canterbury Bridge (Merrimack County, New Hampshire)
Built 1907, Closed in 1965; Demolished 2014Through truss bridge over Merrimack River on Old Canterbury Road in BoscawenRemoved but not replaced
Chain Bridge (1810) (Essex County, Massachusetts)
Built 1810; replaced 1909Lost Wire suspension bridge over Merrimack River on Main Street/TrolleyReplaced by a new bridge
Chain Bridge (1909) (Essex County, Massachusetts)
Built 1909; rehabilitated 2003Suspension bridge over Merrimack River on Main Street in AmesburyOpen to traffic
Concord Free Bridge (Merrimack County, New Hampshire)
Lost Through truss bridge over Merrimack River on Bridge StreetReplaced by a new bridge
County Bridge (Essex County, Massachusetts)
Built 1906; closed 2002 (walkway open); removed 2004Lost 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 2012Swing bridge over Merrimack River on Main Street in AmesburyReplaced by a new bridge
Derek Hines Memorial Bridge (2012) (Essex County, Massachusetts)
Built 2012 to replace previous bridge of same nameConcrete deck girder bridge over Merrimack River on Merrill StreetOpen to traffic
Duck Bridge (Essex County, Massachusetts)
Built 1888 by the Boston Bridge WorksFive-span through truss bridge over Merrimack River on Union StreetOpen to traffic
Federal Bridge (Merrimack County, New Hampshire)
Built 1915Lost Through truss bridge over Merrimack River on US 4Replaced by a new bridge
Franklin Pierce University Suspension Bridge (Hillsborough County, New Hampshire)
Abandoned wire suspension bridge over Merrimack River Back Channel in ManchesterDerelict/abandoned. Main span mostly intact but backspans completely missing. Deck mostly collapsed.
Gillis Memorial Bridge (Essex County, Massachusetts)
Built 1976Bascule bridge over Merrimack River on US 1 (Bridge Road) in NewburyportOpen 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 TrailOpen to pedestrians only
Haverhill Bridge (Essex County, Massachusetts)
Built 1873Lost Deck truss bridge over Merrimack River on S Main StreetReplaced by a new bridge
Hooksett Covered Bridge 29-07-60x (Merrimack County, New Hampshire)
Built 1859Lost Town Lattice through truss covered bridge over Merrimack River on roadReplaced by a new bridge
Hooksett Memorial Bridge (Merrimack County, New Hampshire)
Built 1976 to replace/bypass Lilac BridgeSteel stringer bridge over Merrimack River on Main StreetOpen to traffic
Hunts Falls Bridge (Middlesex County, Massachusetts)
Built 1954; rehabilitated 2012Deck plate girder bridge over Merrimack River on Nesmith StreetOpen to traffic
Island Avenue Canal Bridge (Essex County, Massachusetts)
Built 2012Modern polygonal Warren pony truss bridge with alternating verticals over North Canal on Island AvenueOpen to traffic
Island Road Bridge (Middlesex County, Massachusetts)
Lost pony truss bridge over Tributary of Merrimack River on Island RoadReplaced by a new bridge
John E. Cox Bridge (1937) (Middlesex County, Massachusetts)
Built 1937Through truss bridge over Merrimack River on Bridge Street in LowellOpen to traffic
John Greenleaf Whittier Bridge (1951) (Essex County, Massachusetts)
Built 1951, closed 2016, demolished 2017Through arch bridge over Merrimack River on I-95 in AmesburyReplaced by a new bridge
Joseph W. Casey Bridge (Essex County, Massachusetts)
Built 1918; rehabilitated 1982Concrete deck arch bridge over Merrimack River on MA-114Open to traffic
Lilac Bridge (Merrimack County, New Hampshire)
Built 1909; South span destroyed & replaced 1936; Bypassed in 1976; demolished July 2017Lost through truss bridge over Merrimack River in HooksettSuperstructure replaced with new modern truss footbridge reusing original piers
Lower Covered Bridge 29-07-41-2x (Merrimack County, New Hampshire)
Built 1891Lost Town lattice truss covered bridge over Merrimack River on Manchester StreetReplaced by a new bridge
NEGS - Merrimack River Bridge (Merrimack County, New Hampshire)
Warren through truss with all verticals bridge over Merrimack River on New England Southern RailroadOpen to traffic
Notre Dame Bridge (current) (Hillsborough County, New Hampshire)
Original span built 1988 to replace previous arch bridge. Twin span built 1990Steel stringer bridge over Merrimack River, Everett Turnpike, and Various Local Streets on Bridge StreetOpen to traffic
O'Reilly Memorial Bridge (Essex County, Massachusetts)
Built 1962Steel 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 RoadOpen to traffic
Pembroke Bridge (Merrimack County, New Hampshire)
Built 1915Lost Pratt through truss bridge over Merrimack River on Manchester StreetReplaced by a new bridge
Queen City Bridge (Hillsborough County, New Hampshire)
Built 1923; rehabilitated 1995Deck truss bridge over Merrimack River on US 3/NH 3A in ManchesterOpen to traffic
Richard P. Howe Bridge (Middlesex County, Massachusetts)
Built 2014Deck truss bridge over Merrimack River & Canal on University AvenueOpen 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 2022Through truss swing bridge over Merrimack River on E. Main Street/Bridge StreetClosed indefinitely due to damage from overheight truck
Rourke Bridge (1983) (Middlesex County, Massachusetts)
Built 1983 as a temporary bridge but never replaced by permenant structureBailey pony truss over Merrimack River on Wood StreetOpen to traffic with a weight limit
Sagamore Bridge (Hillsborough County, New Hampshire)
Replaced 1973Lost Closed-spandrel arch bridge over Merrimack River on Lowell RoadReplaced by a new bridge
Sewalls Falls Road Bridge (Merrimack County, New Hampshire)
Built 1915; rehabilitated 1936; Demolished & replaced by UCEB in 2015Through truss bridge over Merrimack River on Sewalls Falls RoadDemolished and replaced
South Union Street Bridge (Essex County, Massachusetts)
Built 1939 to replace previous bridge of unknown design dating to 1860Concrete tee beam bridge over North Canal on South Union StreetOpen to traffic
Taylor Falls Arch Bridge (Hillsborough County, New Hampshire)
Built 1911; Replaced ca. 1973Lost Closed-spandrel arch bridge over Merrimack River on Ferry StreetReplaced by a new bridge
Taylor Falls Iron Bridge (Hillsborough County, New Hampshire)
Built 1882 by Corrugated Metal Co.; Replaced 1911Lost Lenticular through truss bridge over Merrimack River on RoadReplaced by a new bridge
The Crossroads Bridge (Merrimack County, New Hampshire)
Twin span bridge built 1976; SB bridge rehabiliated 2011; NB bridge rehabilitated 2013Steel 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 2012Steel through arch bridge over Merrimack River on MA 113/MA 3A in TyngsboroughOpen to traffic
Tyngsborough Bridge (Old) (Middlesex County, Massachusetts)
Built 1893; replaced 1930Lost Whipple deck truss bridge over Merrimack River on Frost RoadReplaced by a new bridge
University Avenue Bridge (Middlesex County, Massachusetts)
Built 1895 by Groton Bridge Co.; Rehabilitated 1965; Demolished 2014Lost deck truss bridge over Merrimack River on University Avenue in LowellDemolished and replaced.