Marais des Cygnes River Bridge (Franklin County, Kansas)
Parker through truss bridge over Marais des Cygnes River on Burlington Northern Santa Fe Railroad
Open to traffic

Marais des Cygnes River Bridge (Franklin County, Kansas)
Warren through truss bridge over Marais des Cygnes River on Abandoned Railroad Grade - formerly Missouri Pacific Railroad.
Closed to all traffic

Marais des Cygnes River Bridge (Osage County, Kansas)
Pratt through truss bridge over Marais des Cygnes River on Burlington Northern Santa Fe Railroad
Open to traffic

Marathon City Bridge (Marathon County, Wisconsin)
Replaced 1989
Lost Parker through truss bridge over Big Rib River on STH 107 in Marathon City
Replaced by new bridge

Marias Des Cygnes River Bridge (Miami County, Kansas)
Built ca. 1920
Through truss bridge over Marias Des Cygnes River on 347th Street, 1.3 mi. east of Osawatomie
Open to traffic

Maries River CR 608 Bridge (Osage County, Missouri)
Built ca. 1915
Twin through truss bridge over Maries River on CR 608 northeast of Westphalia
Open to traffic with a 7 ton weight limit

Marion Center Road Bridge (Allen County, Indiana)
Built 1879
Whipple through truss bridge over St. Marys River on Marion Center Road
Open to traffic

Marion Memorial Bridge (Marion County, Tennessee)
Built 1929; tolls removed 1947; rehabilitated 1966
Through truss bridge over Nickajack Lake (Tennessee River) on US 41/US 64/US 72/TN 2 (Dixie Highway)
Open to two-lane traffic

Mark Road Bridge (Fayette County, Ohio)
Built 1883 by the Wrought Iron Bridge Co.; reconstructed 2007
Through truss bridge over Sugar Creek on Mark Road
Open to traffic

Mark Twain Bridge (Marion County, Missouri)
Opened Sept. 4, 1936; tolls removed Oct. 30, 1940; rehabilitated 1982; replaced and demolished 2000
Lost through truss bridge over the Mississippi River on US 36 at Hannibal
Replaced by the new I-72 bridge

Marquand Bridge (Madison County, Missouri)
Old bridge built 1924 at a cost of about $4,000, raised by the community. Replaced 1993.
Lost through truss bridge over Castor River on Route A at Marquand
Replaced by concrete span; portion of old bridge now rests in Marquand City Park

Marshall Covered Bridge (Parke County, Indiana)
Built 1917 by J.A. Britton
Covered bridge over Rush Creek on CR W800N
Open to traffic

Marshall Road Bridge (Orleans County, New York)
Built 1909
Through truss bridge over Erie Canal on Marshall Road, west of Medina
Open to traffic

Martin Bridge (Ouachita County, Arkansas)
Lost swing through truss bridge over Ouachita River at Camden
Replaced in 1947 by the Ben Laney Bridge

Martin Luther King Bridge (St. Louis, Missouri)
Built 1951; rehabilitated 1987
Cantilevered through truss over the Mississippi River in downtown St. Louis
Open to four-lane traffic

Mary's River Covered Bridge (Randolph County, Illinois)
Built 1854; carried traffic until 1930; rehabilitated 1954 and 2004-05
Covered bridge over Little Mary's River northeast of Chester, just off IL 150
Open to pedestrians only

Marys River Railroad Bridge (Randolph County, Illinois)
Through truss bridge over Marys River on the Union Pacific Railroad, south of Chester and just west of IL 3
Open to railroad traffic

Mason Bridge (Texas County, Missouri)
Built 1926 by the Concrete & Steel Construction Co.
Closed through truss bridge over Big Piney River on Mason Road (Old MO 32) west of Licking
Closed to all traffic

Matheson Railroad Bridge (Elbert County, Colorado)
Originally built 1883 by the American Bridge Co. as an eight-span bridge at Colona, Illinois, over the Rock River. Two spans relocated here in 1920 to replace an 1899 trestle. Rails removed in 1992.
Abandoned two-span through truss bridge over Big Sandy Creek on the Rock Island Railroad east of Matheson
Railroad line discontinued with tracks removed

Maucks Pond IN 64 Bridge (Gibson County, Indiana)
Built 1931; rehabilitated 1979
Through truss bridge over Maucks Pond on IN 64
Open to traffic

Maumelle River AR 300 Bridge (Pulaski County, Arkansas)
Made obsolete by a new bridge in 1981
Through truss bridge over Maumelle River on AR 300
Open to pedestrians only

Maxwell Bridge (Carroll County, Indiana)
Built 1906
Lost two-span through truss bridge over Tippecanoe River on Bicycle Bridge Road
Replaced by a modern bridge in 2001

McAlister Covered Bridge (Parke County, Indiana)
Built 1914 by J.A. Britton; rehabilitated 1977
Covered bridge over Little Raccoon Creek on CR E400S
Open to traffic

McCafferty Covered Bridge (Brown County, Ohio)
Built 1877; rehabilitated 1963
Covered bridge over East Fork Little Miami River on McCafferty Road (CR 105)
Open to traffic

McClugage Bridge (Peoria County, Illinois)
Eastbound bridge built 1948; westbound bridge built 1982
Pair of cantilevered through truss bridges over the Illinois River on US 24/US 150 in Peoria
Open to four lanes of traffic

McClure Road Bridge (Darke County, Ohio)
Built 1882 by the Massillon Bridge Co.
Through truss bridge over Greenville Creek on TR 276
closed to all traffic

McColly Covered Bridge (Logan County, Ohio)
Built 1876 by the Anderson Green Co.; rehabilitated 2000
Three-span covered bridge over Great Miami River on CR 13
Open to traffic

McConnell's Mill Covered Bridge (Lawrence County, Pennsylvania)
Built 1874; rehabilitated 1957 and 1998
Covered bridge over Slippery Rock Creek in McConnells Mill State Park
Open to traffic

McDowell Bridge (Poweshiek County, Iowa)
Built 1883 by the King Bridge Co.; closed to traffic in 1989
Bowstring through truss bridge over Skunk River in Milgrove Access Wildlife Area
Open to pedestrians

McGirt's Bridge (Bladen County, North Carolina)
Built 1923 by the Atlantic Bridge Co.; replaced ca. 1983
Lost through truss bridge over Cape Fear River on US 701
Replaced by a new bridge

McKinley Bridge (St. Louis, Missouri)
Dedicated Nov. 10, 1910; closed to traffic in Oct. 2001; reopened 2007
Three-span through truss bridge over the Mississippi River between St. Louis and Venice, Illinois
Open to traffic

McLain Covered Bridge (Licking County, Ohio)
Built 1871
Relocated covered bridge at Firemans Park in Alexandria
Open to pedestrians only

McLean Branch MO 79 Bridge (Lincoln County, Missouri)
Built 1938
Through truss bridge over McLean Branch on MO 79 at Winfield
Open to traffic

McLeery Covered Bridge (Fairfield County, Ohio)
Built 1864, moved to private property in 1983, later moved to park in Lancaster.
Multiple Kingpost through truss bridge
Open to pedestrians

Meadow Hill Drive Bridge (Dunn County, Wisconsin)
Built 1926; Replaced 1996
Lost Parker through truss bridge over Wilson Creek on Meadow Hill Drive in Menomonie
Replaced by new bridge

Meadow Road Bridge (Dodge County, Wisconsin)
Built 1890; Replaced 1995
Lost Pratt through truss bridge over Beaver Dam River on Meadow Road in Town of Lowell
Replaced by new bridge

Meadowland Street Bridge (Minnehaha County, South Dakota)
Pratt through truss bridge over Big Sioux River on Meadowland Street (now private), 5 miles south of Baltic
Closed to all traffic

Mecca Covered Bridge (Parke County, Indiana)
Built 1873 by J.J. Daniels; closed to traffic 1964; rehabilitated 1993
Covered bridge over Big Raccoon Creek on CR 136, northeast of Mecca
Open to pedestrians only

Mechanicsville Covered Bridge (Ashtabula County, Ohio)
Built 1867; rehabilitated 2003
Covered bridge over Grand River on Windsor-Mechanicsville Road
Open to traffic

Medora Covered Bridge (Jackson County, Indiana)
Built 1875 by J.J. Daniels; closed to traffic in 1972
Three-span covered bridge over East Fork White River just off IN 235, east of Medora
Open to pedestrians only

Melcher Covered Bridge (Parke County, Indiana)
Built 1896 by J.J. Daniels; rehabilitated 1977 and 1995
Covered bridge over Leatherwood Creek on CR W20N
Open to traffic

Melrose Bridge (Jackson County, Wisconsin)
Built 1922 by Worden-Allen Co.; Replaced 1985
Lost Pennsylvania through truss bridge over Black River on STH 71, STH 108 in Town of Melrose
Replaced by new bridge

Memorial Park Covered Bridge (Auglaize County, Ohio)
Built 1992
Modern covered bridge over St. Mary's River in Memorial Park at St. Mary's
Open to pedestrians only

Memphis-Arkansas Bridge (Shelby County, Tennessee)
Built 1949
Cantilevered through truss bridge over the Mississippi River on I-55 at Memphis
Open to four lanes of traffic

Mengo Bridge (Butler County, Missouri)
Built 1906 by the American Bridge Co.
Two-span through truss bridge over Black River on the Union Pacific Railroad, between Poplar Bluff and Hilliard
Still in use

Merchants Bridge (St. Louis, Missouri)
Completed May 1890
Three-span through truss railroad bridge over the Mississippi River between St. Louis and Venice, Illinois
Open to railroad traffic only

Meredosia Railroad Bridge (Morgan County, Illinois)
Built 1857 (estimated), last train crossed tracks in 1955, dismantled after a new railroad bridge in Valley City opened but one pier still survives
Lost through truss swing bridge over Illinois River on railroad
was built just downstream of the highway bridge

Meridian Bridge (Yankton County, South Dakota)
Built 1924; rehabilitated 1953
Vertical-lift through truss bridge over the Missouri River on US 81 at Yankton
Open to traffic

Merriam Street Bridge (Hennepin County, Minnesota)
Originally built 1887 by the King Iron Bridge Co. as a four-span truss bridge on Broadway Street; one span relocated here in 1987
Relocated through truss bridge over the Mississippi River (East Channel) on Merriam Street at Nicollet Island in Minneapolis
Open to traffic

Merrick Ford Bridge (Jasper County, Missouri)
Built 1891 by the Missouri Valley Bridge & Iron Co.; replaced 1996
Lost through truss bridge over Spring River on Kafir Road (CR 321)
Replaced by a new bridge

Metrolink Footbridge (St. Louis, Missouri)
Cantilevered truss bridge over the Metrolink on a footpath at the east edge of Forest Park
Open to foot traffic

Metropolis Bridge (Massac County, Illinois)
Built 1917 under the direction of engineers C. H. Cartlidge and Ralph Modjeski
Six-span through truss bridge over the Ohio River on the CN Railroad at Metropolis
Open to railroad traffic

Miami Bridge (Saline County, Missouri)
Built 1939; rehabilitated 1983
Cantilevered through truss bridge over the Missouri River on MO 41 at Miami
Open to traffic

Miami Creek MO 52 Bridge (Bates County, Missouri)
Built 1924
Through truss bridge over Miami Creek on MO 52
Open to traffic

Michigan Street Bridge (Door County, Wisconsin)
Built 1930; rehabilitated 1979
Through truss bridge over Sturgeon Bay on Michigan Street in Sturgeon Bay
Open to traffic

Middle Creek Bridge (Miami County, Kansas)
Built 1907
Through truss bridge over Middle Creek on 379th Street, 1.5 mi. south and 1.8 mi. west of New Lancaster
Open to traffic

Middle Fork Little Maquoketa River Bridge (Dubuque County, Iowa)
Built 1915
Lost through truss bridge over Middle Fork Little Maquoketa River on a local road
No longer exists

Middle River Bridge (Madison County, Iowa)
Built 1932
Through truss bridge over Middle River on a local road
Open to traffic

Middle River Katy Bridge (Callaway County, Missouri)
Built 1926 by the American Bridge Co.
Through truss bridge over Middle River on the Katy Trail (former MKT Railroad)
Open to pedestrians and bicyclists only

Middle River Route 774 Bridge (Augusta County, Virginia)
Built 1903
Through truss bridge over Middle River on Route 774
Open to one-lane traffic

Middle River Route 775 Bridge (Augusta County, Virginia)
Built 1908
Through truss bridge over Middle River on Route 775
Open to traffic

Middle River Route 778 Bridge (Augusta County, Virginia)
Built 1915 by the Champion Bridge Co.
Through truss bridge over Middle River on Route 778
Open to traffic

Middle River VA 256 Bridge (Augusta County, Virginia)
Built 1907 by the Champion Bridge Co.
Three-span through truss bridge over Middle River on VA 256
Closed to all traffic

Middle Road Covered Bridge (Ashtabula County, Ohio)
Built 1868; rehabilitated 1984
Covered bridge over Conneaut Creek on Middle Road in Conneaut
Open to traffic

Midland Fredericktown Road Bridge (Columbiana County, Ohio)
Built 1900; rehabilitated 2004
Through truss bridge over North Fork Little Beaver Creek on Midland Fredericktown Road (TR 1038) in Calcutta
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

Mile Corner Road Bridge (Cooper County, Missouri)
Replaced by new bridge in 1989
Abandoned through truss bridge over Petite Saline Creek on Mile Corner Road
Replaced by new bridge, but allowed to remain standing

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

Mill Branch Covered Bridge (Washington County, Ohio)
Moved to Barlow Fairgrounds in 1980.
Multiple Kingpost through truss bridge in Barlow
Open to pedestrians

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 (Wabaunsee County, Kansas)
Built ca. 1935
Through truss bridge over Mill Creek on Willard Road, 1.0 mi. east and 0.2 mi. north of Maple Hill
Open to traffic

Mill Creek Covered Bridge (Parke County, Indiana)
Built 1907 by D.M. Brown
Covered bridge over Mill Creek on CR N550W
Open to traffic

Mill Hill Road Bridge (Franklin County, Missouri)
Bypassed by new bridge in 1993
Through truss bridge over Meramec River on Mill Hill Road south of Moselle
Closed to traffic

Mill Road Bridge (Darke County, Ohio)
Built 1881 by the Massillon Bridge Co.
Through truss bridge over Greenville Creek on TR 385 in Gettysburg
Open to traffic

Mill Rock Bridge (Jackson County, Iowa)
Built 1913; Replaced 1995
Lost Pratt through truss bridge over Big Bear Creek on 33rd Avenue in Monmouth Township
Replaced by new bridge

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 CR 469
Replaced by a new bridge

Millersville Bridge (Cape Girardeau County, Missouri)
Built 1923; rehabilitated 1975
Two-span through truss bridge over Whitewater River on MO 72 at Millersville
Open to two-lane traffic on a paved road

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

Millport Covered Bridge (Knox County, Missouri)
Built 1872 by William Hudson; collapsed ca. 1954 and replaced by a pony truss bridge
Lost covered bridge over Middle Fork Fabius River at Millport
No longer exists

Mink Hollow Covered Bridge (Fairfield County, Ohio)
Built 1887 by J.R.Brandt, bypassed
Multiple Kingpost through truss bridge over Arney Run
Open to pedestrians

Minneapolis Railroad Bridge (Ottawa County, Kansas)
Through truss bridge over Pipe Creek on the Kyle Railroad at Minneapolis
Open to traffic

Minnesota River Bridge (Blue Earth County, Minnesota)
Built 1954
Through truss bridge over Minnesota River on CR 42
Open to traffic

Minnesota River MN 4 Bridge (Brown County, Minnesota)
Built 1930-31; replaced 1994
Lost two-span through truss bridge over Minnesota River on MN 4
Replaced by new bridge

Mississinewa River IN 1 Bridge (Randolph County, Indiana)
Built 1941; rehabilitated 1979 and 2008
Through truss bridge over Mississinewa River on IN 1
Open to traffic

Mississippi River Bridge (Ramsey County, Minnesota)
Through truss bridge over Mississippi River on Chicago and Northwestern Railroad


Mississippi River Bridge (Dakota County, Minnesota)
Warren through truss bridge over Mississippi River on Soo Line Railroad


Mississippi River I-10 Bridge (East Baton Rouge Parish, Louisiana)
Built 1968
Through truss bridge over Mississippi River on I-10 in Baton Rouge
Open to traffic

Mississippi River US 190 Bridge (East Baton Rouge Parish, Louisiana)
Built 1989
Through truss bridge over the Mississippi River on US 190 in Baton Rouge
Open to traffic

MO 7 Bridge (Cass County, Missouri)
Built 1948; rehabilitated 1984, Rehabilitated 2005
Through truss bridge over railroad tracks and Big Creek on MO 7
Open to traffic

Mobridge Railroad Bridge (Walworth County, South Dakota)
Through truss bridge over Missouri River (Oahe Lake) on the BNSF Railroad between Mobridge and Wakpala
Open to traffic

Monett Business US 60 Bridge (Barry County, Missouri)
Built 1935
Through truss bridge over the railroad on Business US 60 east of Monett
Open to two-lane traffic

Moniteau Creek Road Bridge (Cole County, Missouri)
Built 1915; made obsolete by a new bridge on MO 179 in 1967
Through truss bridge over Moniteau Creek on Moniteau Creek Road (Old MO 179)
Open to traffic

Montezuma Bridge (Parke County, Indiana)
Built 1949; rehabilitated 1987
Six-span through truss bridge over Wabash River on US 36 at Montezuma
Open to two-lane traffic

Montoursville Bridge (Lycoming County, Pennsylvania)
Built 1931; rehabilitated 1994
Three-span through truss bridge over Loyalsock Creek on PA 2014 in Montoursville
Open to traffic

Monument Road Bridge (Harris County, Georgia)
Built 1930
Truss bridge over Sand Creek on Monument Road
Closed to all traffic

Moreau Creek Covered Bridge (Moniteau County, Missouri)
Lost covered bridge over Moreau Creek somewhere near California
No longer exists

Morrilton Bridge (Conway County, Arkansas)
Lost swing through truss bridge over Arkansas River on AR 9 at Morrilton
No longer exists

Morris Bridge (Grundy County, Illinois)
Built 1934; rehabilitated 1978; replaced 2002
Lost five-span through truss bridge over the Illinois River on IL 47 at Morris
Replaced by modern bridge

Morrison Bridge (Montgomery County, Ohio)
Built 1881
Whipple through truss bridge in Dayton
Open to pedestrians

Morse Mill Bridge (Jefferson County, Missouri)
Built ca. 1886 by the St. Louis Bridge & Iron Co. Made obsolete by a new bridge on Route B in 1962.
Closed through truss bridge over Big River at Morse Mill
Open to pedestrians only