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

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

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

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

Meeker Drive Bridge (Cowlitz County, Washington)
Built 1952
Truss bridge over Kalama River on Meeker Drive
Open to 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

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

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

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

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 CR 181 Bridge (Bates County, Missouri)
Built 1925
Pony truss bridge over Miami Creek on CR 181 (Elkhart Road)
Open to traffic

Michigan Avenue Bridge (Cook County, Illinois)
Built 1920
Bascule bridge over Main Branch Chicago River on Michigan Avenue in Chicago
Open to traffic

Middle Creek Bridge (Miami County, Kansas)
Pony truss bridge over Middle Creek, 1.3 mi. south and 1.0 mi. west of Beagle
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

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 (Wasco County, Oregon)
Built 1948
Deck truss bridge over Mill Creek on US 26
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

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

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

Millers Bridge (Butler County, Missouri)
Built 1924
Pony truss bridge over Cane Creek on Route PP (Old US 60) west of Poplar Bluff
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

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

Milltown High Street Bridge (Warren County, Pennsylvania)
Built 1937; rehabilitated 1982
Pony truss bridge over Tionesta Creek on PA 2002 (High Street) in Milltown
Open to traffic

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

Milwaukee River Bridge (Ozaukee County, Wisconsin)
Built 1929, Replaced 2003
Truss bridge over Milwaukee River on CTH MY in Newburg
Demolished

Milwaukee River Bridge (Ozaukee County, Wisconsin)
Built 1928, Replaced 2005
Truss bridge over Milwaukee River on Green Bay Street (WI 33) in Saukville
Demolished - Replaced by concrete slab

Miner Street Bridge (Clear Creek County, Colorado)
Built 1902 by Kuyes and Work. Reconstructed 1990 (the trusses are no longer load-bearing).
Reconstructed pony truss bridge over Clear Creek on Miner Street in Idaho Springs
Open to traffic

Miners Park Bridge (Madison County, Illinois)
Built 2003 as part of building a new library
Bowstring pony truss bridge over Judy Branch on bike trail in Glen Carbon
Open to pedestrians

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

Mingo Ditch Bridge (Stoddard County, Missouri)
Formerly a bridge on the Frisco Hoxie Branch railroad built in 1926 (?) and refurbished for vehicle use when the line was discontinued
Pony truss bridge over Mingo Ditch southwest of Puxico on CR 499
Open to one-lane traffic on a gravel road with a 17 ton weight limit

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

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 319 Bridge (Mississippi County, Missouri)
Built 1922 as part of a bridge with at least two spans; relocated here 1965
Pony truss bridge over Ditch 29 on CR 319 just off MO 77
Open to traffic

Mississippi County Road 322 Bridge (Mississippi County, Missouri)
Built ca. 1922; relocated here 1966
Pony truss bridge over Spillway Ditch on CR 322 southeast of Charleston
Open to traffic on a gravel road

Mississippi County Road 325 Bridge (Mississippi County, Missouri)
Built 1922; relocated here in 1966
Pony truss bridge over Spillway Ditch on CR 325 southeast of Charleston
Open to traffic on a gravel road

Mississippi County Road 418 Bridge (Mississippi County, Missouri)
Built ca. 1922; relocated here 1970
Pony truss bridge over St. James Ditch on CR 418 west of MO 105
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 County Road 521 Bridge (Mississippi County, Missouri)
Built ca. 1922; relocated here 1965
Pony truss bridge on CR 521 over Wilkinson Drainage Ditch just west of MO 102
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-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 River Bridge (Doniphan County, Kansas)
Pennsylvania through truss bridge over Missouri River on Union Pacific Railroad
Open to traffic

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

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

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

Moline Main Street Bridge (Elk County, Kansas)
Pony truss on North Main Street over Wildcat Creek in Moline
Open to one lane traffic on a paved street

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

Moneek Bridge (Winneshiek County, Iowa)
Built ca. 1872. Relocated to Castalia City Park ca. 1993
Bowstring pony truss bridge
Open to pedestrians

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

Monkey Jack Bridge (Henry County, Indiana)
Built in 1910, closed in 1970's
Pony truss bridge over Big Blue River on CR 225 West
Closed to all traffic with deck missing

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
Open to traffic

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

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

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

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

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

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

Morton Creek AR 341 Bridge (Baxter County, Arkansas)
Built 1929; replaced 2004
Lost pony truss bridge over Morton Creek on AR 341 north of Norfolk in Salesville
Replaced by a new bridge

Mosby Creek Covered Bridge (Lane County, Oregon)
Built in 1920. Oldest covered bridge in Lane County. Restored in 1990.
Howe through truss bridge on Mosby Creek Road
Open to traffic

Moscow Covered Bridge (Rush County, Indiana)
Built 1886 by E. L. Kennedy
Two-span covered bridge over Flatrock River on CR 900S at Moscow
Destroyed by tornado June 3, 2008. County has voted to rebuild it.

Moss Road Bridge (Blount County, Alabama)
Built 1940
Through truss bridge over Calvert Prong Little War on Moss Road
Open to traffic