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HAER documented

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McKees Rocks Bridge (Allegheny County, Pennsylvania)
Built 1931; rehabilitated 1987
Steel through arch bridge over Ohio River on Chartiers Avenue in Pittsburgh
Open to traffic

McMillin Bridge (Pierce County, Washington)
Built 1934. Bypassed by a new vehicular bridge and left in place in 2015.
Concrete truss bridge over Puyallup River on WA 162 in McMillin
Open to pedestrians only

McPherson's Ford Bridge (Alleghany County, Virginia)
Built 1896; Rehabilitated in 1948, bypassed and preserved 2013
Through truss bridge over Cowpasture River on Route 633 (McKinney Hollow Rd)
Open to pedestrians only

Mead Avenue Bridge (Crawford County, Pennsylvania)
Built 1871; additional trusses added 1912
Two-span Whipple through truss bridge over French Creek on Mead Avenue in Meadville
In storage or disassembled

Mechanic Street Covered Bridge 29-04-06 (Coos County, New Hampshire)
Built 1862; Rebuilt 2006
Covered bridge over Israel River on Mechanic Street in Lancaster
Open to traffic

Medora Covered Bridge 14-36-04 (Jackson County, Indiana)
Built 1875, closed to vehicle traffic in 1972, restored in 2011
Three-span covered bridge over East Fork White River just off IN 235, east of Medora
Open to pedestrians only

Melan Bridge (Lyon County, Iowa)
Built 1894 under the direction of Frederick von Emperger; relocated 1964
Reinforced concrete arch bridge within Emma Sater Park near Rock Rapids, just off IA 9
Open to pedestrians only

Memorial Avenue Bridge (Lycoming County, Pennsylvania)
Built 1889 by the Groton Bridge Co.; center pier added 1925; replaced 1987
Lost through truss bridge over Lycoming Creek on Memorial Avenue (SR 3021) in Williamsport
Replaced by a new bridge

Meramec River MO 19 Bridge (Crawford County, Missouri)
Built 1925 by the Federal Bridge Co.; replaced 2000
Lost five-span closed-spandrel arch bridge over Meramec River on MO 19
Replaced by a modern bridge

Merchants Bridge (St. Louis, Missouri)
Completed in May 1890; approaches rebuilt in 2005
Three-span through truss railroad bridge over the Mississippi River between St. Louis and Venice, Illinois on Terminal Railroad Assosiation
Open to two tracks of railroad traffic. Only one train is allowed to cross the bridge at a time, due to its age.

Meriden Rock Creek Bridge (Jefferson County, Kansas)
Built ca. 1880; Replaced in 1983
Bowstring pony truss bridge over Rock Creek near Meriden
Replaced by a new bridge

Merritt Parkway - Norwalk River Bridge (Fairfield County, Connecticut)
Built 1938; rehabilitated 1988
Concrete arch bridge over Norwalk River on Merritt Parkway (CT 15) in Norwalk
Open to traffic

Merritt Parkway over Bayberry Lane Bridge (Fairfield County, Connecticut)
Built 1939
Concrete arch bridge over Bayberry Lane on Merritt Parkway (CT 15) in Westport
Open to traffic

Merritt Parkway over Black Rock Turnpike Bridge (Fairfield County, Connecticut)
Built 1938
Concrete rigid frame bridge over Black Rock Turnpike (CT 58) on Merritt Parkway (CT 15)
Open to traffic

Merritt Parkway over Chestnut Hill Road Bridge (Fairfield County, Connecticut)
Built 1937
Concrete arch bridge over Chestnut Hill Road (CT 53) on Merritt Parkway (CT 15) in Norwalk
Open to traffic

Merritt Parkway over Cross Highway Bridge (Fairfield County, Connecticut)
Built 1938
Concrete arch bridge over Cross Highway on Merritt Parkway (CT 15) in Fairfield
Open to traffic

Merritt Parkway over Huntington Road Bridge (Fairfield County, Connecticut)
Built 1940
Rigid frame bridge over Huntington Road on the Merritt Parkway (CT 15)
Open to traffic above and below

Merritt Parkway over Taconic Road Bridge (Fairfield County, Connecticut)
Built 1936
Concrete arch bridge over Taconic Road on Merritt Parkway (CT 15) in Greenwich
Open to traffic

Metz Road Bridge (Montgomery County, Pennsylvania)
Built 1896; rehabilitated 1960 Removed in 2007
Lost Pony truss bridge over Towamencin Creek on Metz Road in Towamencin Township.
Replaced by a new bridge

Michigan Avenue Bridge (Cook County, Illinois)
Built 1920; repaired after freak accident 1992
Bascule bridge over Main Branch Chicago River on Michigan Avenue (former US 14) in Chicago
Open to traffic

Midvale Bridge (Washington County, Idaho)
Built 1911 by the J.H. Forbes Co.; replaced 1995
Lost two-span through truss bridge over Weiser River at Midvale
Replaced by new bridge

Milk River Bridge (Blaine County, Montana)
Built 1916
Timber and Steel Combination through truss bridge over Milk River on CR 178
Open to traffic

Milk River CR 507 Bridge (Valley County, Montana)
Built 1911; replaced 2002
Lost through truss bridge over Milk River on CR 507
Replaced

Mill Creek Bridge (Crawford County, Indiana)
Built 1885; rehabilitated 2000
Through truss bridge over Mill Creek on CR 220 East
Open to traffic

Mill Creek Bridge (Luzerne County, Pennsylvania)
Built 1885
Stone arch bridge over Mill Creek on PA 2004 (River Street) in Wilkes-Barre
Open to traffic

Mill Creek Bridge (New Castle County, Delaware)
Built between 1873 and 1900. Known rehabilitation 1926 and 1982.
Warren pony truss bridge over Mill Creek on Evanson Road
Open to traffic

Mill Creek Bridge (Kent County, Delaware)
Built 1936; Rehabilitated 1970; Replaced 1996
Lost Slab bridge over Mill Creek on Sr 6 (Woodland Beach Road)
Replaced by a new bridge

Mill Road Bridge (Schenectady County, New York)
Relocated ca. 1983 from Parish, NY
Pratt pony truss bridge over Unnamed brook on Pedestrian Path
Open to pedestrians only

Miller Bridge (Cleburne County, Arkansas)
Built 1912 by contractor Harry Churchill
Lost swinging bridge over Little Red River on AR 16, now inundated by Greers Ferry Lake
No longer exists

Miller Ford Bridge (Gentry County, Missouri)
Built 1907 by the St. Joseph Bridge & Iron Co.; replaced 1997
Lost through truss bridge over Grand River on Old Havana Trail (CR 469)
Replaced by a new bridge

Million Dollar Bridge (Valdez-Cordova Census Area, Alaska)
Built 1910 on the CR&NW Railroad; closed 1938; reopened as a highway bridge in 1958; fourth span collapsed in earthquake on March 27, 1964, collapsed span repaired 2005
Four-span through truss bridge over Copper River on Copper River Highway
Open to one-lane traffic

Milltown Bridge (Sebastian County, Arkansas)
Built 1940 by the Works Progress Administration
Two-span stone arch bridge over Vache Grasse Creek on CR 77 (Mount Harmony Road) west of Milltown
Open, no visible weight limit sign.

Milner Bridge (Pickens County, Alabama)
Lost Warren through truss bridge over Tombigbee River on AL Hwy 17
No longer exists

Milton Bridge (Wayne County, Indiana)
Built 1881; replaced 1997
Lost through truss bridge over Whitewater River on Milton Road
Replaced by new bridge

MILW - Clark Fork River Bridge (Mineral County, Montana)
Abandoned warren deck truss bridge over Clark Fork River on Milwaukee Road
Abandoned

Mispillion River Bridge (Kent County, Delaware)
Built 1903; Replaced 1994
Lost Steel stringer bridge over Mispillion River on Church Street
Replaced by a new bridge

MNCW - Moodna Viaduct (Orange County, New York)
Built 1906-08 for the Erie Railroad
Deck girder bridge over Moodna Creek, Orrs Mills Road and Otterkill Road on Metro-North's Port Jervis commuter line and Norfolk Southern Railway
Open to traffic

MNCW - Wepawaug River Bridge (Old) (New Haven County, Connecticut)
Built 1894, replaced 1999
Lost Double-intersection Warren deck truss bridge over Wepawaug River and Prospect Street on Metro-North New Haven Line
Replaced by a new bridge

Moab Canyon Wash Arch Bridge (Grand County, Utah)
Built 1941
Closed-spandrel arch bridge over Moab Canyon Wash on Primary access to Arches National Park and Main Entrance Road


Monroe Street Bridge (Cook County, Illinois)
Built 1919
Bascule bridge over South Branch Chicago River on W. Monroe Street in Chicago
Open to traffic

Moody Ford Bridge (Barton County, Missouri)
Built 1884 by the Missouri Valley Bridge & Iron Co.; replaced 1998; relocated to private property in Nov. 1999
Through truss bridge formerly over North Fork Spring River on SW 60th Road (CR 432)
Open to traffic on a private lane

Moonville Bridge (Madison County, Indiana)
Built 1930; replaced 1999
Lost pony truss bridge over Killbuck Creek on CR 600 N
Replaced by new bridge

Morehouse Drive over Merritt Parkway Bridge (Fairfield County, Connecticut)
Built 1939
Concrete rigid frame bridge over Merritt Parkway (CT 15) on Morehouse Drive
Open to traffic

Morgan Covered Bridge 45-08-07 (Lamoille County, Vermont)
Built 1887; rehabilitated 1898 and 1980
Covered bridge over North Branch Lamoille River on Morgan Bridge Road in Belvidere
Open to traffic

Morris Terminal Rail Bridge (Grundy County, Illinois)
Built 1905
Quadruple Intersection Warren Through Truss over Illinois and Michgan Canal on the I&M Canal Trail (former Rock Island Railroad)
Open to Pedestrians

Morton's Highway Crossing (Kalamazoo County, Michigan)
Built 1904; Replaced 1992
Lost concrete through arch bridge over Amtrak/Conrail Railroad on O Avenue near Oshtemo
Replaced by new bridge

Mosel Avenue Bridge (Kalamazoo County, Michigan)
Built 1924; Altered 1953; Deck resurfaced 1985; Replaced 1990
Lost Concrete pony arch bridge over Kalamazoo River on Mosel Avenue in Kalamazoo
Replaced by new bridge

Mosel Avenue Grade Separation (Kalamazoo County, Michigan)
Built 1924; Demolished 1990
Lost Camelback concrete deck girder bridge over Riverview Drive on Mosel Avenue in Kalamazoo
Removed but not replaced

Moseley Wrought Iron Arch Bridge (Essex County, Massachusetts)
Built 1864 at Pacific Mills in Lawrence; relocated 1989; reopened to foot traffic in 1995
Relocated wrought-iron through arch bridge on the grounds of Merrimack College in North Andover
Open to pedestrians

Mosier Creek Bridge (Wasco County, Oregon)
Built 1920
Concrete arch bridge over Mosier Creek on HWY 100 in Mosier
Open to traffic

Mott Bridge (Hettinger County, North Dakota)
Built 1921; replaced 1982
Lost two-span rainbow arch bridge over North Fork Cannonball River on First Street in Mott
Replaced by new bridge

Mount Meridian Bridge (Augusta County, Virginia)
Built 1907 by the Champion Bridge Co.; Closed to all traffic in 1997
Three-span through truss bridge over Middle River on former Route 769
Closed to all traffic

Mountain Fork River CR 38 Bridge (Polk County, Arkansas)
Built 1905
Two-span pony truss bridge over Mountain Fork River on CR 38 near Potter
Open to one lane traffic

Mt. Vernon Street Bridge (Caledonia County, Vermont)
Built circa 1885 by the Berlin Iron Bridge Co.; Demolished 1975
Lost Lenticular pony truss bridge over Sleepers River on Mt. Vernon Street
Replaced by a new bridge

Muddy Fork Cowlitz River Bridge (Lewis County, Washington)
Built 1952
Concrete arch bridge over Muddy Fork Cowlitz River on Stevens Canyon Road
Open to traffic

Muddy River Bridge (Clark County, Nevada)
Built 1932-33; demolished ca. 1987
Lost two-span pony truss bridge over Muddy River on Old US 91
No longer exists, replaced by new bridge

Mulladay Hollow Bridge (Carroll County, Arkansas)
Built ca. 1935 by the Civilian Conservation Corps
Small two-span stone arch bridge over Mulladay Hollow Creek on CR 204 at Leatherwood Lake Recreation Area northwest of Eureka Springs in Eureka Springs
Open to traffic

Mystic River Bascule Bridge (New London County, Connecticut)
Built 1922
Bascule bridge over Mystic River on US 1 West Main Street at Mystic
Open to traffic

Nachitoch Bluff Bridge (Clark County, Arkansas)
Built 1908 by the Morava Construction Co.; rehabilitated 1980; closed to traffic ca. 1996
Derelict two-span through truss over Little Missouri River, just upstream from I-30
Abandoned, with deck partially missing

Natural Dam Bridge (Crawford County, Arkansas)
Built 1934 by contractor M.E. Gillioz, replacing an earlier truss bridge built in 1907 by the Illinois Steel Bridge Co.
Two-span through truss bridge over Lee Creek on AR 59 near the community of Natural Dam
Open to traffic

Navajo Bridge (Coconino County, Arizona)
Built 1927-1929; bypassed by parallel bridge in 1995
Steel arch bridge over Colorado River on Alt US 89
Open to pedestrians only

Neawanna Creek Bridge (Clatsop County, Oregon)
Built 1930
Concrete deck girder bridge over Neawanna Creek on U.S. 101 in Seaside
Open to traffic

Nebraska City Railroad Bridge (Otoe County, Nebraska)
Built 1888 under the direction of George S. Morison
Lost Whipple through truss bridge over Missouri River
Removed

Nepesta Bridge (Pueblo County, Colorado)
Built 1905-06 by the Pueblo Bridge Co.; replaced 1989
Lost two-span through truss bridge over Arkansas River on Nepesta Road (CR 613) southeast of Boone
Replaced by a new bridge

New Bedford-Fairhaven Middle Bridge (Bristol County, Massachusetts)
Swing span built 1897-99
Through truss swing bridge over Acushnet River on US 6 at New Bedford
Open to traffic

New Hampton Bridge (Hunterdon County, New Jersey)
Built 1868 by the Cowin Iron Works for the Pennsylvania Railroad
Iron pony truss bridge over Musconetcong River on Rymon Road
Open to traffic

New Portland Wire Bridge 19-13-S1 (Somerset County, Maine)
Built ca. 1866; rehabilitated 1961
Suspension bridge over Carrabasset River on Wire Bridge Road in New Portland
Open to traffic

New River Gorge Bridge (Fayette County, West Virginia)
Opened on October 22, 1977
Massive steel arch bridge over New River on US 19 east of Fayette
Open to traffic

New Shoreham Bridge (Washington County, Rhode Island)
Built 1917; Replaced 1997
Lost Concrete tee beam bridge over Harbor Pond on Beach Avenue
Replaced by a new bridge

Newman Bridge (Henry County, Missouri)
Built 1917 by the Canton Bridge Co.; replaced 1998
Lost concrete girder bridge over West Fork of Tebo Creek on CR NE 500
Replaced by a new bridge

Newport Bridge (Jackson County, Arkansas)
Built 1930
Cantilevered through truss bridge on AR 367 (formerly US 67) over White River at Newport
Open to two-lane traffic

NH - India Point Bridge (Providence County, Rhode Island)
Built 1903, abandoned 1974, movable span removed early 2000s
Lost Baltimore through truss bridge over Seekonk River on NYNH&H Fox Point Branch (abandoned)
Partially Demolished

Nineteenth Street Bridge (Denver County, Colorado)
Built 1888 by the Missouri Valley Bridge & Iron Works; rehabilitated 1965; closed to traffic 1986; new bridge built 1992
Two-span wrought-iron through truss bridge over South Platte River on 19th Street in Denver
Open to pedestrians only

Nineveh Bridge (Adair County, Missouri)
Built 1885; replaced 1989
Lost through truss bridge over Old Channel Chariton River on CR 175 east of Connelsville
Replaced by a concrete bridge

Nishnabotna River Bridge (Crawford County, Iowa)
Built 1945
Bowstring pony truss bridge over Nishnabotna Creek on 300th Street near Manilla
Open to traffic

NJT - Lower Hack Lift Bridge (Hudson County, New Jersey)
Built 1928
Three-track through truss bridge over Hackensack River on NJT RR (formerly DL&W RR)
Open to traffic

NLAX - Jay-Jay Bridge (Brevard County, Florida)
Built 1963; Deteriorated span replaced 1987.
Bridge over Indian River on NASA Railroad
Open to traffic

Noakes Bridge (Nodaway County, Missouri)
Built 1891-92 by the St. Joseph Bridge & Iron Co.; replaced 1991
Lost through truss over One Hundred and Two River on 130th Street (CR 156) southwest of Hopkins
Replaced by a concrete bridge

Norfork Bridge (Baxter County, Arkansas)
Construction started Aug. 21, 1936, by the Vincennes Steel Company; dedicated June 17, 1937; Demolished September 2014
Lost four-span deck truss bridge over North Fork White River on AR 5 at Norfork
Replaced by a new bridge

Normanskill Farm Bridge (Albany County, New York)
Built 1869; relocated here ca. 1900
Wrought and cast iron bowstring through truss bridge on a private driveway near Normans Kill Ravine in Albany
Open to Authorized Vehicles. Closed to Vehicles During Winter. Pedestrians Allowed.

North Avenue Bridge (Old) (Cook County, Illinois)
Built 1907
Double-leaf bascule through truss bridge over North Branch Chicago River on North Avenue in Chicago
Replaced by a modern bridge

North Avenue over Merritt Parkway Bridge (Fairfield County, Connecticut)
Built 1939
Concrete rigid frame bridge over Merritt Parkway (CT 15) on North Avenue
Open to traffic

North Fork Crazy Woman Creek Bridge (Johnson County, Wyoming)
Built 1880; Relocated 1964; rehabilitated 1986; replaced 2006
Lost Pony truss bridge over North Fork Crazy Woman Creek on CN16-265
Replaced by a new bridge

North Fork Feather River Bridge (Plumas County, California)
Built 1936
Through truss bridge over North Fork Feather River on CA 70
Open to traffic

North Fork of Middle Fork Tule River Bridge (Tulare County, California)
Built 1912-13, Replaced 1988
Lost Pratt deck truss bridge over North Fork of Middle Fork Tule River on State Route 190
Replaced by new bridge

North Halsted Street Bridge (Old) (Cook County, Illinois)
Built 1909
Bascule bridge over North Branch Chicago River Canal on N. Halsted Street in Chicago
Demolished and replaced

North Williston Bridge (Chittenden County, Vermont)
Built 1925 by the Standard Engineering & Contracting Co.; closed to traffic in 1990; replaced 1993
Lost Pennsylvania through truss bridge over Winooski River on North Williston Road
Replaced by new bridge

Northampton Street Bridge (Northampton County, Pennsylvania)
Built 1896; damaged and fixed 1955; rehabilitated 2002
Cantilevered through truss bridge over Delaware River on Northampton Street
Open to two-lane traffic with a 3 ton weight limit

Norwottuck Rail Trail - Connecticut River Bridge (Hampshire County, Massachusetts)
Built 1887; retrofitted for pedestrian use in 1992
Lattice through truss bridge over Connecticut River on Norottuck Rail Trail
Open to pedestrians and bicyclists

Notre Dame Bridge (Hillsborough County, New Hampshire)
Built 1936; replaced 1988
Steel Arch bridge over Merrimack River on Bridge Street in Manchester
Replaced by a new bridge

NS - Granville Bridge (Mifflin County, Pennsylvania)
Built 1905 by the Pennsylvania Railroad
Eight-span stone arch bridge over the Juniata River on the Norfolk Southern Railway
Open to traffic

NS - Mount Union Bridge (Huntingdon County, Pennsylvania)
Built 1906 by PRR, reinforced with concrete by Conrail ca. 1980
Closed-spandrel arch bridge over Croghan Pike (522) and Juniata River on Norfolk Southern (former PRR)
Open to traffic

NS - New Geneva Bridge (Fayette County, Pennsylvania)
Built 1912-13
Pennsylvania through truss bridge over Monongahela River on Norfolk Southern Railroad
Open to traffic

NS - Portage Viaduct (3rd) (Wyoming County, New York)
Built 1903 reusing 1875 substructure; rehabilitated 1944; bypassed with new bridge and abandoned Dec. 2017.
Deck truss bridge over Genesee River on Norfolk Southern Railway north of Portageville
Tracks shifted to new bridge and old bridge abandoned Dec. 10-11, 2017

Oak Creek Bridge (Washington County, Utah)
Bridge over Oak Creek on administrative acess road
Open to traffic

Oak Grove Road Bridge (Highland County, Ohio)
Built 1874 by the Wrought Iron Bridge Co.
Lost bowstring truss bridge over East Fork Little Miami River on Oak Grove Road (CR 42)
No longer exists. HAER documentation sometime after 1983, bridge removed after that.

Oakland Avenue Bridge (Mercer County, Pennsylvania)
Built 1936; rehabilitated 1979; replaced 2006
Lost open-spandrel arch bridge over PA 62 (Connely Blvd.) on S. Oakland Avenue in Sharon
Replaced by a new bridge

OCTL - Diverging Through Truss Bridge (Crawford County, Pennsylvania)
Lattice through truss bridge over French Creek on Oil Creek & Titusville Lines (Nee Erie Railway)


OCTL - French Creek Bridge (Crawford County, Pennsylvania)
Lattice through truss bridge over French Creek on Erie Railway
Open to traffic

Odessa Bridge (New Castle County, Delaware)
Built 1929; Replaced 1991
Deck plate girder bridge over Appoquinnimink River on Delaware State Route 299 Main Street Road
Replaced by a new bridge