Little Zion Bridge (Madison County, Missouri)
Built 1922
Pony truss bridge over a branch of Twelvemile Creek near Zion on CR 417 (Old US 67)
Open to traffic with a 20 ton limit on a paved road

Lobatos Bridge (Conejos County, Colorado)
Built 1989
Pony truss bridge over Rio San Antonio on CR G east of Antonito
Open to two-lane 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

Logan Creek Katy Bridge (Callaway County, Missouri)
Pony truss bridge over Logan Creek on the Katy Trail (former MKT Railroad)
Open to pedestrians and bicyclists only

Logan Creek Old US 160 Bridge (Ripley County, Missouri)
Built 1923; made obsolete by new US 160 alignment in 1974
Pony truss bridge over Logan Creek on CR 160E-12 (Old US 160), northeast of Doniphan
Open to traffic on a paved road

Longman Road Bridge (Preble County, Ohio)
Built ca. 1875
Pony truss bridge over Sugar Creek on Longman Road (TR 255)
Open to traffic

Los Cerritos Bridge (Conejos County, Colorado)
Reconstructed 1987
Pony truss bridge over Conejos River on CR M south of Manassa
Open to one-lane traffic

Lost River Bridge (Orange County, Indiana)
Built ca. 1920; rehabilitated 1992
Pony truss bridge over Lost River on CR 500 East
Open to traffic

Lye Creek Bridge (Montgomery County, Indiana)
Built 1879
Pony truss bridge over Lye Creek on CR 475 East
Closed to all traffic

Macoupin Bridge (Macoupin County, Illinois)
Pony truss bridge over Macoupin Creek on Lake Catatoga Road south of Macoupin
Open to one-lane traffic

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

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

Mammoth Spring Bridge (Fulton County, Arkansas)
Lost six-span pony truss bridge over the outlet of Mammoth Spring
No longer exists

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

Mariah Creek Bridge (Knox County, Indiana)
Built ca. 1930; rehabilitated 1984
Pony truss bridge over Mariah Creek on CR 1050 North
Open to traffic

Martin Bridge (Lake County, Colorado)
Pony truss on a bike trail east of Leadville crossing CR 3
Open to two-lane bike traffic above and road traffic below

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

Massie Creek Katy Trail Bridge (Warren County, Missouri)
Pony truss bridge over Massie Creek on the Katy Trail just off MO 94
Open to pedestrians and bicyclists only

McGilvray Road Bridge No. 1 (La Crosse County, Wisconsin)
Built 1906 by the the La Crosse Bridge & Steel Co.
Two-span bowstring truss bridge over a tributary of Black River on Old McGilvray Road in Van Loon Wildlife Area
Open to pedestrians only

McGilvray Road Bridge No. 2 (La Crosse County, Wisconsin)
Built 1908 by the the La Crosse Bridge & Steel Co.
Two-span bowstring truss bridge over a tributary of Black River on Old McGilvray Road in Van Loon Wildlife Area
Open to pedestrians only

McGilvray Road Bridge No. 3 (La Crosse County, Wisconsin)
Built 1905 by the the La Crosse Bridge & Steel Co.
Bowstring truss bridge over a tributary of Black River on Old McGilvray Road in Van Loon Wildlife Area
Open to pedestrians only

McGilvray Road Bridge No. 4 (La Crosse County, Wisconsin)
Built 1907 by the the La Crosse Bridge & Steel Co.
Two-span bowstring truss bridge over a tributary of Black River on Old McGilvray Road in Van Loon Wildlife Area
Open to pedestrians only

McGilvray Road Bridge No. 6 (La Crosse County, Wisconsin)
Built 1905 by the the La Crosse Bridge & Steel Co.
Bowstring truss bridge over a tributary of Black River on Old McGilvray Road in Van Loon Wildlife Area
Open to pedestrians only

McIlroy Road Bridge (Randolph County, Arkansas)
Built 1963
Lost pony truss bridge over an unnamed creek on McIlroy Road
No longer exists

McKenzie Creek Iron Bridge (Wayne County, Missouri)
Warren pony truss bridge over McKenzie Creek on Missouri Pacific Railroad
Open to traffic

McKenzie Creek MO 49 Bridge (Wayne County, Missouri)
Built 1929
Pony truss bridge over McKenzie Creek on MO 49 south of Gads Hill
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

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

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

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

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

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

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

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

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

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

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

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

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

Mossy Creek Route 613 Bridge (Augusta County, Virginia)
Built 1910
Pony truss bridge over Mossy Creek on Route 613
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 Glen Bridge (Union County, Illinois)
Pony truss bridge over a branch of Clear Creek near Mountain Glen
Open to traffic on a paved road

Mountain St. over the Verdugo Wash (Los Angeles County, California)
1936
Pony truss bridge over Verdugo Wash on Mountain St. in Glendale, Los Angeles County, California


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

Mulberry River AR 23 Bridge (Franklin County, Arkansas)
Built 1935 by McEachin and McEachin, Inc., of Little Rock
Three-span pony truss bridge over Mulberry River on AR 23
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

Mystery Bedstead Bridge (Cooper County, Missouri)
Relocated bedstead pony truss bridge visible from Highway M, just west of Harriman Hill Access
Abandoned in a field

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

New Lick Log Creek Bridge (Bollinger County, Missouri)
Originally built ca. 1922 on a state highway. Relocated here in 1995 to replace the older Lick Log Creek Bridge (now derelict)
Refurbished pony truss bridge over Lick Log Creek on CR 736 near Gipsy
Open to traffic with no posted restrictions

New Rothrock Mill Bridge (Crawford County, Indiana)
Built 2005; replaced the old Rothrock Mill Bridge
Warren pony truss bridge over Blue River on Rothrock Mill Road (Co. Rd 120 South)
Open to traffic

Niangua River Old US 66 Bridge (Webster County, Missouri)
Built 1924
Pony truss bridge on Route CC (Old US 66) over East Fork Niangua River
Open to traffic

Noix Creek MO 79 Bridge (Pike County, Missouri)
Built 1935
Pony truss bridge over Noix Creek on MO 79 in Louisiana
Open to two-lane traffic

North Boat Ditch US 67 Bridge (Clark County, Arkansas)
Built 1931 by the Virginia Bridge & Iron Co. of Roanoke, Virginia
Pony truss bridge over North Boat Ditch of Terre Noire Creek on US 67
Open to traffic

North Caney Creek Bridge (Chautauqua County, Kansas)
Built ca. 1910
Pony truss bridge over North Caney Creek, 2.0 mi. north and 2.0 mi. east of Peru
Closed to all traffic

North Cayuga Street Bridge (Tompkins County, New York)
Built 1934; rehabilitated 2002
Pony truss bridge over Fall Creek on North Cayuga Street in Ithaca
Open to traffic

North Fork Little Maquoketa River Bridge (Dubuque County, Iowa)
Built 1901
Pony truss bridge over North Fork Little Maquoketa River on a local road
Open to traffic

North Fork MO 126 Bridge (Barton County, Missouri)
Built 1954
Three-span pony truss bridge over North Fork Spring River on MO 126
Open to two-lane traffic

North Fork Route H Bridge (Jasper County, Missouri)
Built 1933
Pony truss bridge over North Fork Spring River on Route H
Open to traffic

North Fork Route M Bridge (Jasper County, Missouri)
Built 1949
Pony truss bridge over North Fork Spring River on Route M (Baseline Road) in Carytown
Open to two-lane traffic

North Wea Creek Bridge (Miami County, Kansas)
Built ca. 1910
Pony truss bridge over North Wea Creek, 4.3 mi. west and 2.0 mi. north of Louisburg
Open to traffic

Norway Road Bridge (Newton County, Missouri)
Relocated here 1995
Pony truss bridge over Elm Spring Branch on Norway Road, just off Route HH
Open to two-lane traffic

Oak Grove Bridge (Madison County, Missouri)
Built 1922; made obsolete by new bridge in 1972
Pony truss bridge over Barnes Creek on CR 504 (Old MO 72, formerly MO 70) west of Fredericktown
Open to traffic on a paved road

Okamanpedan State Park Bridge (Emmet County, Iowa)
Built 1914; rehabilitated 1923
Pony truss bridge over East Fork Des Moines River on Tuttle Lake Road at Okamanpedan State Park
Open to one-lane traffic

Okatibbee Creek Bridge (Lauderdale County, Mississippi)
Built 1926
Pony truss bridge over Okatibbee Creek on Old US 80 in Meridian
Open to traffic

Old Appleton US 61 Bridge (Cape Girardeau County, Missouri)
Built 1931
Pony truss bridge over Apple Creek on US 61 at Old Appleton
Open to two-lane traffic on a dangerous curve

Old Five Road Bridge (Morgan County, Missouri)
Built 1922
Pony truss on Old Five Road over a branch of Little Gravois Creek
Open to traffic

Old Houston Mill Bridge (DeKalb County, Georgia)
Replaced 1958
Abandoned pony truss bridge over South Fork of Peachtree Creek on Old alignment of Houston Mill Rd in Atlanta
Abandoned

Old Jefferson Town Bowstring Bridge (Jefferson County, Kansas)
Built by the King Iron Bridge & Mfg Co. of Cleveland, Ohio. Relocated to Old Jefferson Town in Oskaloosa, Kansas. Added to the National Register of Historic Places in 1990.
Bowstring pony truss bridge over Unnamed creek
Open to pedestrians

Old Lincoln Highway Bridge (Douglas County, Nebraska)
Replaced 1998, the Pony Truss structures were replaced on the new bridge
Lost pony truss bridge over W Br Papillion Creek on Old Lincoln Hwy
Replaced by new bridge

Old Mines Bridge (Washington County, Missouri)
Built 1923; rehabilitated 1933; replaced Summer 2007
Lost pony truss bridge over Old Mines Creek on MO 21
Replaced by a new bridge

Old US 14 Bridge (Sheridan County, Wyoming)
Bridge made obselete by new bridge in 1994, and is now a pedestrian bridge.
Parker pony truss bridge over Tongue River on Old US 14 in Dayton
Open to pedestrians

Oneota Drive Bridge (Winneshiek County, Iowa)
Built 1948
Pony truss bridge over Drainage Channel on Oneota Drive in Decorah
Open to traffic

Orleans Bridge (Dickinson County, Iowa)
Originally located near New Hampton; relocated here in 1995
Bowstring pony truss bridge over the outlet below Spirit Lake on the Iowa Great Lakes Bike Trail at Orleans
Open to pedestrians and bicyclists only

Orten Creek Bridge (Scott County, Arkansas)
Built 1915; rehabilitated 1984
Pony truss bridge over Orten Creek on CR 60
Open to one-lane traffic

Osage Fork MO 5 Bridge (Laclede County, Missouri)
Built 1932
Three-span pony truss bridge over Osage Fork on MO 5 in Twin Bridges
Open to traffic

Osage Valley Road Bridge (Cooper County, Missouri)
Built 1913; rehabilitated 1993
Pony truss bridge over Petite Saline Creek on Osage Valley Road
Open to traffic

Osiris Bridge (Cedar County, Missouri)
Built ca. 1910; replaced 2006
Lost pony truss bridge over Horse Creek on CR 1600
Replaced by a new bridge

Ottawa Street Bridge (Newton County, Missouri)
Built by the Canton Bridge Co.
Pony truss bridge over Little Lost Creek on Ottawa Street in Seneca
Open to traffic

Ouachita River CR 74 Bridge (Polk County, Arkansas)
Built 1914; replaced 2001
Lost pony truss bridge over Ouachita River on CR 74
Replaced by a new bridge

Ouachita River CR 76 Bridge (Polk County, Arkansas)
Built 1914
Pony truss bridge over Ouachita River on CR 76
Open to one-lane traffic