Structurally deficient

Little Flora Creek Bridge (Cape Girardeau County, Missouri)
Built ca. 1925
Pony truss bridge over Little Flora Creek on CR 635 southwest of Egypt Mills
Open to traffic

Little Indian Creek John Pectol Road Bridge (Floyd County, Indiana)
Built ca. 1930; rehabilitated 1972
Pony truss bridge over Little Indian Creek on John Pectol Road in Galena
Open to traffic

Little Laflin Bridge (Bollinger County, Missouri)
Built ca. 1930; replaced 2005
Lost pony truss bridge over a branch of Crooked Creek near Laflin on CR 408
Replaced by a new bridge

Little Muncy Creek PA 442 Bridge (Lycoming County, Pennsylvania)
Built 1927
Pony truss bridge over Little Muncy Creek on PA 442
Open to traffic

Little Niangua Swinging Bridge (Camden County, Missouri)
Built 1932
Self-anchored suspension bridge over Little Niangua River on Route J between MO 7 and US 54
Open to two-lane traffic

Little Osage River Bridge (Bourbon County, Kansas)
Built in 1896 by the Wrought Iron Bridge Co.
Through truss bridge over Little Osage River, 3.0 mi. west and 2.0 mi. north of Xenia
Open to traffic

Little Robinson Road Bridge (Benton County, Arkansas)
Built ca. 1930
Pony truss bridge over an unnamed creek on Robinson Road (CR 103)
Open to one-lane traffic

Little Salt Creek Bridge (Lawrence County, Indiana)
Built 1897; rehabilitated 1987
Through truss bridge over Little Salt Creek on CR 595 East
closed to all traffic

Little Shawnee Creek Bridge (Fountain County, Indiana)
Built 1935
Pony truss bridge over Little Shawnee Creek on CR 200 East
Open to traffic

Little Valley Church Bridge (Bollinger County, Missouri)
Built 1922
Pony truss bridge over Cane Creek on CR 524 northwest of Dongola
Open to traffic on a gravel road with an 8 ton (?) weight limit

Little Wabash River Bridge (Edwards County, Illinois)
Built 1893
Through truss bridge over Little Wabash River on TR 229, 6.5 mi. west of Grayville
Open to traffic

Log Creek MO 13 Bridge (Caldwell County, Missouri)
Built 1930; rehabilitated 1940
Through truss bridge over Log Creek on MO 13 in Kingston
Open to traffic

Log Creek Road Bridge (Caldwell County, Missouri)
Built 1908
Pony truss bridge over Log Creek on S.W. Log Creek Road
Open to traffic

Log Lick Creek Bridge (Switzerland County, Indiana)
Built 1882
Through truss bridge over Log Lick Creek on Dead End Road
Closed to all traffic

Long Shoals Bridge (Bourbon County, Kansas)
Built 1902 by the Midland Bridge Co.
Abandoned through truss bridge over Little Osage River, 5.0 mi. east and 1.0 mi. south of Fulton
Closed to all traffic

Los Verjeles Road Bridge (Yuba County, California)
Built 1940
Concrete arch bridge over South Honcut Creek on Los Verjeles Road in Loma Rica
Open to traffic

Lost Bridge (Miami County, Indiana)
Built 1915; rehabilitated 1982
Through truss bridge over Eel River on CR 100 East
Open to traffic

Lost Creek Bridge (Bourbon County, Kansas)
Built 1888
Through truss bridge over Lost Creek, 3.0 mi. east and 0.3 mi. north of Mapleton
Closed to all traffic

Lost Creek CR 528 Bridge (Wayne County, Missouri)
Built ca. 1950; rehabilitated 1988
Wooden bridge over West Fork Lost Creek on CR 528, northwest of Shook
Open to one-lane traffic

Lowndes Bridge (Wayne County, Missouri)
Built ca. 1920; closed to all traffic 2008
Through truss bridge over Bear Creek located at the Iron Bridge Conservation Area
Closed to all traffic

Lynn Creek Bridge (Van Buren County, Arkansas)
Built 1980
Steel stringer bridge over Lynn Creek on CR 88
Open to traffic

Mace Creek Bridge (Andrew County, Missouri)
Built ca. 1925
Through truss bridge over Mace Creek on CR 392
Open to traffic

MacGregor Street Bridge (Jasper County, Missouri)
Built ca. 1950
Wooden bridge over the MNA Railroad on MacGregor Street in Carthage
Open to traffic

Mahalasville Road Bridge (Morgan County, Indiana)
Built ca. 1920
Relocated pony truss bridge over Buck Creek
Open to pedestrians only

Main Ditch CR 307 Bridge (Butler County, Missouri)
Built ca. 1920 by Miller & Borcherding Bridge Builders; replaced August 2005
Lost pony truss bridge over Main Ditch (Pike Creek) on CR 307 (Lone Star Road) just south of Poplar Bluff in Poplar Bluff
Replaced by a new bridge

Main Ditch Old US 60 Bridge (Stoddard County, Missouri)
Built 1922, rehabilitated 1932
Pony truss bridge over a tributary of Main Ditch on MO 114 (Old US 60) east of Dexter
Open to one-lane traffic

Marais Ditch Route B Bridge (Bates County, Missouri)
Built 1934; rehabilitated 1952
Pony truss bridge over Marais des Cygnes River Drainage Ditch on Route B
Open to traffic

Marais River Route B Bridge (Bates County, Missouri)
Built 1934
Pony truss bridge over Marais des Cygnes River on Route B
Open to traffic

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

Market Street Bridge (Jefferson County, Ohio)
Built 1904; rehabilitated 1981
Suspension bridge over the Ohio River on WV 2 Spur (Market Street) in Steubenville
Open to traffic

Market Street Bridge (Hamilton County, Tennessee)
Built 1917
Bascule bridge over Tennessee River on Market Street (TN 8) in Chattanooga
Closed until 2007 for rehabilitation

Marsh Arch Bridge (Kossuth County, Iowa)
Built 1916 by the Marsh Engineering Co.
Pony arch bridge over East Fork Des Moines River on CR P14
Open to traffic

Martintown Road Bridge (Union County, Mississippi)
Built 1968
Pony truss bridge over Tallahatchie River on CR 86 (Martintown Road) in New Albany
Open to traffic

Maryland Street Bridge (Pike County, Missouri)
Built ca. 1920
Pony truss bridge over Town Branch on Maryland Street in Louisiana
Open to one-lane traffic with an 8 ton weight limit

Mason Bridge (Texas County, Missouri)
Built 1926
Closed through truss bridge over Big Piney River on Mason Road (Old MO 32) west of Licking
Closed to all traffic

Massac Creek Bridge (Massac County, Illinois)
Wooden bridge over Massac Creek within Fort Massac State Park in Metropolis
Open to one-lane traffic

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

McCutcheon Road Bridge (St. Louis County, Missouri)
Built 1944
Concrete bridge over I-64/US 40 on McCutcheon Road in Ladue
Open to traffic above, but scheduled for demolition

McKinney Creek Bridge (Polk County, Arkansas)
Built 1915
Pony truss bridge over McKinney Creek on CR 50
Open to one-lane traffic

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

McNeely Creek Bridge (Clark County, Arkansas)
Built 1923; rehabilitated 1990
Pony truss bridge over McNeely Creek on CR 12
Open to one-lane traffic

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

Menomonee River Bridge (Milwaukee County, Wisconsin)
Built 1976
Pony truss bridge over Menomonee River on N. 50th Street in Milwaukee
This bridge does not exist

Meramec River US 66 Bridge (St. Louis County, Missouri)
Built 1931
Deck truss bridge over Meramec River at Times Beach on Old US 66 in Wildwood
Open to traffic on a frontage road within Route 66 State Park

Meridian Road Bridge (Carroll County, Indiana)
Built 1908
Pony truss bridge over Deer Creek on Meridian Road
Open to 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

Middle Creek Bridge (Miami County, Kansas)
Built ca. 1920
Concrete arch bridge over Middle Creek, 9.0 mi. south and 3.6 mi. west of Louisburg
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 Fork Smith River Bridge (Del Norte County, California)
Built 1925; rehabilitated 1972
Concrete arch bridge over Middle Fork Smith River on US 199
Open to traffic

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

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

Mill Creek Bridge (Washington County, Missouri)
Built 1935
Concrete tee beam bridge over Mill Creek on Route M
Open to traffic

Mill Creek Bridge (Bourbon County, Kansas)
Built 1927
Through arch bridge over Mill Creek on North Crawford in Fort Scott
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 Creek MO 47 (Washington County, Missouri)
Built 1964
Steel stringer bridge over Mill Creek on Mo 47 S
Open to traffic

Mill Creek Park Suspension Bridge (Mahoning County, Ohio)
Built 1895 by the Youngstown Bridge Co.
Suspension bridge over Mill Creek in Mill Creek Park at Youngstown
Open to traffic

Miller Creek Bridge (Alexander County, Illinois)
Built 1933
Pony truss bridge over Miller Creek on Old Illinois Route 3 northeast of Thebes, 1 mi. north of Thebes
Open to two-lane traffic

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

Milton Road Bridge (Wood County, Ohio)
Removed 2008
Unusual pony truss bridge over Needles Creek on Milton Road
Gone - Disposition unknown

Milwaukee River Parkway, Lincoln Park, North Branch (Milwaukee County, Wisconsin)
Built 1940
Bridge over North Branch Milwaukee River on Milwaukee River Parkway
Open to traffic

Milwaukee River Parkway, Lincoln Park, South Branch (Milwaukee County, Wisconsin)
Built 1940
Bridge over South Branch Milwaukee River on Milwaukee River Parkway
Open to traffic

Minerva Creek Bridge (Marshall County, Iowa)
Built 1912
Arch bridge over Minerva Creek on a local road
Open to traffic

Minerva Creek Bridge (Marshall County, Iowa)
Built 1919
Pony truss bridge over Minerva Creek on a local road
Open to traffic

Mississippi County Road 307 Bridge (Mississippi County, Missouri)
Built 1921
Pony truss on CR 307 (Old US 60) near Birds Point over a drainage ditch emptying into Brewer Lake in Wyatt
Open to traffic on a paved road with a 20 ton weight limit

Mississippi County Road 310 Bridge (Mississippi County, Missouri)
Built ca. 1922; relocated here 1966
Pony truss bridge over a drainage ditch on CR 310
Open to traffic

Mississippi County Road 314 Bridge (Mississippi County, Missouri)
Built 1922 as part of a bridge with at least two spans; relocated here in 1965
Pony truss bridge over Ditch 29 on CR 314, just off MO 77 south of Wyatt
Open to traffic

Mississippi County Road 518 Bridge (Mississippi County, Missouri)
Built ca. 1922; relocated here 1965; replaced Summer 2005
Lost(?) pony truss bridge over Four Mile Pond Drainage Ditch on CR 518 just east of MO 102
No longer exists

Mississippi River I-35W Bridge (Hennepin County, Minnesota)
Built 1967; collapsed Aug. 1, 2007
Collapsed deck truss bridge over the Mississippi River on I-35W in Minneapolis
Collapsed

Missouri Street Bridge (Washington County, Missouri)
Pony truss bridge over Breton Creek on Missouri Street in Potosi, just south of the courthouse
Open to traffic

MoDOT Bridge (Cole County, Missouri)
Built ca. 1920; rehabilitated 1990
Closed pony truss bridge over Wears Creek off MoDOT Drive in Jefferson City
Closed to all traffic and posted against trespassing

Mollys Run Bridge (Jefferson County, Indiana)
Built 1905
Pony truss bridge over Mollys Run on Brooksburg Manville Road (CR 260N)
Open to one-lane 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

Morman Fork CR 81 Bridge (Bates County, Missouri)
Pony truss bridge over a branch of Morman Fork on CR 81 (West Boone Road)
Open to traffic

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 Creek Bridge (Sullivan County, Indiana)
Built 1935
Pony truss bridge over Morrison Creek on CR 75 North
Open to traffic

Morton Bridge (Ray County, Missouri)
Built by the Wrought Iron Bridge Co.
Through truss bridge over Crooked River on Landing Road
Open to traffic

Mossy Creek Route 613 Bridge (Augusta County, Virginia)
Built 1910
Pony truss bridge over Mossy Creek on Route 613
Open to traffic

Mount Carmel Bridge (Wabash County, Illinois)
Built 1932; rehabilitated 1987
Through truss bridge over Wabash River on IL 15/IN 64 in Mount Carmel
Open to traffic

Mount Hope Bridge (Bristol County, Rhode Island)
Built 1929; rehabilitated 1985
Suspension bridge over Mount Hope Bay on RI 114 in Bristol
Open to traffic

Mountain Fork Bridge (Polk County, Arkansas)
Built 1905
Two-span pony truss bridge over Mountain Fork Creek on CR 38 near the community of Camp Pioneer
Open to traffic

Mountain Fork River Bridge (McCurtain County, Oklahoma)
Built 1948
Through truss bridge over Mountain Fork River on US 70
Open to traffic

Mud Creek Bridge (Marion County, Kansas)
Concrete pony arch bridge over Mud Creek, 0.6 mi. north of Marion
Open to traffic

Muddy Creek Old US 65 Bridge (Pettis County, Missouri)
Built ca. 1930
Through truss bridge over Muddy Creek on Claycomb Road (Old US 65) north of Sedalia
Open to traffic

Multnomah Channel Bridge (Multnomah County, Oregon)
Built 1948
Through truss bridge over Multnomah Channel on FAS A668 in Portland
Open to traffic

Murphy Drive Bridge (Caldwell County, Missouri)
Built ca. 1930
Pony truss bridge over Long Creek on S.W. Murphy Drive
Open to traffic

Murray Bridge (Humboldt County, Iowa)
Built 1905 by A.H. Austin; rehabilitated 1982; damaged in car wreck during 2004
Through truss bridge over West Fork Des Moines River on 190th Street, southeast of Bradgate
Closed to traffic

N. 45th Street Bridge (Milwaukee County, Wisconsin)
Built 1952
Pony plate girder bridge over Menomonee River on N 45th Street in Milwaukee
Open to traffic

N. Hawley Road Bridge (Milwaukee County, Wisconsin)
Built 1917
Concrete arch bridge over Menomonee River on N. Hawley Road in Milwaukee
Replaced

Nahma Bridge (Delta County, Michigan)
Built 1917 by the Joliet Bridge & Iron Co.; closed to traffic in 1995; relocated Summer 2006
Pony truss bridge formerly over Sturgeon River on CR 497
Relocated to a golf course

Neosho River Bridge (Neosho County, Kansas)
Through truss bridge over Neosho River on 42.5-17.6 Local, 1.0 mi. east and 2.6 mi. south of St. Paul
Open to traffic

Neosho River Bridge (Neosho County, Kansas)
Built 1928
Through truss bridge over Neosho River, 1.2 mi. south and 0.4 mi. west of Erie
Open to traffic

Neosho River Bridge (Neosho County, Kansas)
Built 1908
Through truss bridge over Neosho River, 2.4 mi. west of Erie
Closed to all traffic

Neosho River US 75 Bridge (Coffey County, Kansas)
Built 1934; Lost 2006
Through truss bridge over Neosho River on US 75
Lost

New Harmony Bridge (Posey County, Indiana)
Built 1932
Closed four-span through truss toll bridge over Wabash River on IL 14 at New Harmony, Indiana
Open to toll traffic