North Fork Coal Creek Bridge (Fountain County, Indiana)
Built 1901
Through truss bridge over North Fork Coal Creek on CR 200 East
Open to traffic

North Fork Coal Creek Bridge (Fountain County, Indiana)
Built 1915
Through truss bridge over North Fork Coal Creek on CR 500 East
Open to traffic

North Fork Holston River CSX Railroad Bridge (Sullivan County, Tennessee)
Construction started in 1907 by the South and Western Railroad Co., and finished in 1908 by its successor, the Carolina, Clinchfield and Ohio Railroad Company (now CSX)
Deck truss bridge over North Fork Holston River on CSX Railroad in Kingsport
Open to rail 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 Halsted Street Bridge (Cook County, Illinois)
Built 1909
Bascule bridge over North Branch Chicago River Canal on N. Halsted Street in Chicago
Open to traffic

North Railroad Street Bridge (Rush County, Indiana)
Built 1901 by the New Castle Bridge Co.
Through truss bridge over Little Flatrock River on North Railroad Street
Closed to all traffic

North River Bridge (Marion County, Missouri)
Lost through truss bridge over North River somewhere near Palmyra
No longer exists

North River Bridge (Madison County, Iowa)
Built ca. 1920; rehabilitated 1967
Through truss bridge over North River on a local road
Open to traffic

North River MO 168 Bridge (Marion County, Missouri)
Built 1932
Four-span through truss bridge over North River on MO 168, west of Palmyra
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

North Wea Creek Bridge (Miami County, Kansas)
Built 1905
Parker through truss bridge over North Wea Creek, 3.5 mi. south and 7.8 mi. west of Louisburg
Closed to all traffic

North Yamhill River Bridge (Yamhill County, Oregon)
Built 1921
Deck truss bridge over North Yamhill River on Southbound OR 99W
Open to traffic

Northern Pacific Railroad Bridge (Hennepin County, Minnesota)
Built 1895
Pratt deck truss bridge over Mississippi River on Northern Pacific Railroad (now pedestrian trail) in Minneapolis
Open to pedestrians

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

Norwood Creek Bridge (McCurtain County, Oklahoma)
Built 1948; replaced 2005
Lost through truss bridge over Norwood Creek on OK 87
No longer exists

Oak Creek Footbridge (Milwaukee County, Wisconsin)
Through truss bridge over Oak Creek on Pedestrian Walkway in Grant Park in South Milwaukee
Open to pedestrians

Oak Dale Road Bridge (Moniteau County, Missouri)
Built ca. 1930
Through truss bridge over Straight Fork on Oak Dale Road northwest of Latham
Open to one-lane traffic with a 15 ton weight limit

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

Oakalla Covered Bridge (Putnam County, Indiana)
Built 1898 by J.J. Daniels
Covered bridge over Big Walnut Creek on CR 375W
Open to traffic

Oakland Bridge (Douglas County, Oregon)
Built 1925
Deck truss bridge over Calapooya Creek on Shady Highway in Oakland
Open to traffic

Occoquan River Bridge (Prince William County, Virginia)
Parker through truss bridge over Occoquan River on Richmond, Fredericksburg and Potomac Railroad
Open to traffic

Offutt's Ford Covered Bridge (Rush County, Indiana)
Built 1884 by Kennedy Bros.
Covered bridge over Little Blue River on Offutt Bridge Road
Open to traffic

Ohio River I-77 Bridge (Washington County, Ohio)
Through truss bridge over the Ohio River on I-77 near Marietta
Open to traffic

Okabena Bridge (Jackson County, Minnesota)
Built 1936; replaced 1998
Lost through truss bridge over Jack Creek on CSAH 9 at Okabena
Replaced by a modern bridge

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 Alton Bridge (Denton County, Texas)
Built 1884 by the King Bridge Co.; later bypassed
Through truss bridge over Hickory Creek on Copper Canyon Road in Denton
Open to pedestrians only

Old Alton Road Bridge (Oregon County, Missouri)
Through truss bridge over Warm Fork Spring River on the old Thayer-Alton Road near Thayer
Closed to all traffic

Old Appleton Bridge (Cape Girardeau County, Missouri)
Built 1879 by H.W. Sebastian & Co. of St. Louis; washed away by flash flood on December 3, 1982; reconstructed 2005
Wrought-iron through truss bridge over Apple Creek on Main Street in Old Appleton
Open to pedestrians and bicyclists only

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 Arkadelphia Bridge (Clark County, Arkansas)
Built before 1907, possibly by Stupp Brothers Bridge & Iron Co.
Lost two-span through truss bridge over Ouachita River at Arkadelphia carrying AR 7, AR 8, and AR 51
Replaced by the current Arkadelphia Bridge

Old Barn Bridge (Fillmore County, Minnesota)
Built 1914
Through truss bridge over Mill Pond South Branch Root on Heron Rd.
Open to traffic

Old Camp Nelson Bridge (Garrard County, Kentucky)
Built 1927 and replaced the Camp Nelson Covered Bridge. However, in turn, it was replaced by the new (US 27) Camp Nelson Bridge in 1972.
Parker Truss bridge over Kentucky River on Old Lexington Road
Closed to all traffic

Old Chain of Rocks Bridge (St. Louis, Missouri)
Built 1929; closed to traffic in 1968; reopened for pedestrians on June 5, 1999
Cantilevered through truss bridge over the Mississippi River on Old US 66 just south of the modern I-270 bridge in St. Louis
Open to pedestrians and bicyclists

Old Clay's Ferry Bridge (Fayette County, Kentucky)
Built 1871; rehabilitated 1955
Two-span through truss bridge over Kentucky River on KY 2328 (Old US 25) in Lexington
Open to traffic

Old Cleves Bridge (Hamilton County, Ohio)
Built 1914 by the Penn Bridge Co.; parallel bridge built 1959-60; closed to traffic Feb. 1988; replaced 1990
Lost four-span through truss bridge over the Great Miami River on eastbound US 50 at Cleves
Replaced by modern bridge

Old Covington Bridge (Washington County, Illinois)
Lost through truss bridge with wooden deck, replaced by a modern bridge in the 1980s.
Lost through truss bridge over Kaskaskia River on Covington Road
Replaced by new beam bridge at current site

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 Grade Road Bridge (Adair County, Missouri)
Built 1924; replaced 1989
Lost skewed through truss bridge over North Fork Salt River (Brashear Ditch) on CR 285 (Old Grade Road) south of Brashear
Replaced by a concrete bridge

Old Highway 66 Bridge (Warrick County, Indiana)
Built 1941
Two span Parker through truss bridge over Little Pigeon Creek on Old Highway 66
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 Katy Bridge (Geary County, Kansas)
Built 1913 by the Pencoyd Bridge & Construction Co.
Through truss bridge over Lyon Creek on Otter Creek Road, just southeast of Wreford
Open to traffic

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 Monroe Bridge (Lincoln County, Missouri)
Built 1930
Three-span through truss bridge over Cuivre River on Main Street (Old MO 79) in Old Monroe
Closed to all traffic as of March 2008

Old Monroe Railroad Bridge (Lincoln County, Missouri)
Three-span through truss bridge over Cuivre River on the BNSF Railroad at Old Monroe
Open to railroad traffic

Old Monticello Road Bridge (Bradley County, Arkansas)
Lost swing through truss bridge over Saline River on AR 4 (now US 278) between Warren and Monticello
Replaced 1949 by a new bridge located upstream

Old Richardsville Road Bridge (Warren County, Kentucky)
Built 1889
Three span Bowstring Arch Truss bridge over Barren River on Old Richardsville Road in Bowling Green
Open to traffic

Old River Bridge (Saline County, Arkansas)
Built 1899 by the Youngstown Bridge Co. of Youngstown, Ohio; closed to traffic in 1974
Two-span through truss bridge over Saline River on the Old Military Road near Benton
Abandoned with portions of deck missing

Old River Road Bridge (Warrick County, Indiana)
Built 1893
Through truss bridge over Little Pigeon Creek on Old River Road
Open to traffic

Old Rt. 36 Bridge (Hendricks County, Indiana)
Built 1875 by the Columbia Bridge Works of Dayton, OH on old us 36
Whipple through truss bridge over White Lick Creek on Pedestrian trail
Open to pedestrians

Old Rusty Bridge (Clay County, Iowa)
Built 1901 by the Clinton Bridge & Iron Works; relocated here in 1915
Through truss bridge over Little Sioux River on 210th Avenue north of Spencer in Spencer
Open to one-lane traffic

Old St. Charles Bridge (St. Charles County, Missouri)
Completed 1904; closed to traffic in 1992; finally dismantled in 1997
Lost four-span through truss bridge over the Missouri River at St. Charles
Replaced by a new bridge

Old State Road Bridge (Clinton County, Illinois)
Built ca. 1930
Pony truss bridge over Beaver Creek on Old State Road (TR 109)
Open to one-lane traffic with a 6 ton weight limit

Old TN 100 Bridge (Davidson County, Tennessee)
Parker through truss bridge over South Harpeth River on Old Harding Rd. (Old TN 100) in Nashville
Closed to all traffic

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

Old Vicksburg Bridge (Warren County, Mississippi)
Built 1930
Cantilevered through truss bridge over the Mississippi River at Vicksburg just north of the I-20 bridge in Vicksburg
Closed to all vehicular and pedestrian traffic, but still used by the Kansas City Southern railroad

Old Yankton Road Bridge (Minnehaha County, South Dakota)
Built 1895 by S.M. Hewett
Through truss bridge over Big Sioux River on Old Yankton Road in Sioux Falls
Open to pedestrians only

Oldtown Bridge (Bonner County, Idaho)
Built 1926-27; replaced 1988
Lost four-span Parker through truss bridge over Pend Oreille River on US 2 in Oldtown
Replaced by new bridge

Olin Covered Bridge (Ashtabula County, Ohio)
Built 1873; reconstructed 1993
Covered bridge over Ashtabula River on Dewey Road (TH 334) in Edgewood
Open to traffic

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

Onion Creek Bridge (Montgomery County, Kansas)
Built 1911 by the Western Bridge Co.
Through truss bridge over Onion Creek just south of US 166 near Coffeyville
May or may not still be standing

Only Bridge (Hickman County, Tennessee)
Derelict through truss bridge over Duck River on TN 50 near Only
Derelict with deck and approaches removed

Orange Road Bridge (Delaware County, Ohio)
Built 1898 by the Toledo Bridge Co.; rehabilitated 1970
Through truss bridge over Olentangy River on Orange Road (TR 114) in Powell
Open to one-lane traffic

Orangeville Bridge (Orange County, Indiana)
Through truss bridge over Lost River on CR 520 West
Open to traffic

Oregon City Covered Bridge (Butte County, California)
Built 1983 by Clay Castleberry
Modern covered bridge over Oregon Gulch Creek on Oregon Gulch Road at Oregon City
Open to traffic

Oregon Creek Covered Bridge (Yuba County, California)
Built 1860 by Thomas Freeman
Covered bridge over Oregon Creek on Alleghany Road at Oregon Creek Campground
Open to traffic

Organ Ferry Bridge (Ralls County, Missouri)
Lost through truss bridge near New London
No longer exists

Oriana Bridge (Stonewall County, Texas)
Built 1917 by the Missouri Valley Bridge & Iron Co.; modified 1918 by Austin Brothers; closed to traffic 1995
Through truss bridge over Salt Fork Brazos River on CR 207
Unknown status

Oriental Covered Bridge (Juniata County, Pennsylvania)
Built 1908; rehabilitated 1987
Covered bridge over West Branch Mahantango Creek on PA 2023
Open to traffic

Orleans Avenue Bridge (Minnehaha County, South Dakota)
Through truss bridge was closed to traffic for many years, posing a safety hazard resulting in the city councils decision to remove it
Lost through truss bridge over Big Sioux River on Orleans Avenue in Dell Rapids
Removed

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

Orr Road Bridge (Washington County, Arkansas)
Built 1924
Through truss bridge over Illinois River on Orr Road (CR 67) just off AR 265, southeast of Prairie Grove
Open to one-lane traffic

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 City Railroad Bridge (Cole County, Missouri)
Through truss bridge on the Union Pacific Railroad over Osage River at Osage City
Still in use

Osage Creek Bridge (Benton County, Arkansas)
Built 1911 by the Youngstown Bridge Co. of Youngstown, Ohio
Through truss bridge over Osage Creek on CR 71 southeast of Healing Springs
Open to one-lane traffic

Osage Fork MO 32 Bridge (Laclede County, Missouri)
Built 1933
Through truss bridge over Osage Fork on MO 32
Open to 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 River MO 7 Bridge (Benton County, Missouri)
Built 1930; replaced in the 1970s by a new bridge with the creation of Truman Reservoir
Lost through truss bridge over Osage River on MO 7 (formerly MO 35) west of Warsaw
Removed

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

Osceola Bridge (St. Clair County, Missouri)
Lost two-span through truss bridge over Osage River at Osceola
Demolished with the creation of Truman Reservoir

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

Oswald Bridge (Madison County, Illinois)
Built 1937
Pony truss bridge over Sugar Creek on Michael Road, east of Highland, 1.5 mi. east of Highland
Open to traffic

Ottawa Railroad Bridge (La Salle County, Illinois)
4 span through truss Vertical lift bridge
Through truss bridge over Illinois River on Chicago, Burlington, and Quincy Railroad in Ottawa


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

Otter Creek Bridge (Chautauqua County, Kansas)
Built 1936 by the Works Progress Administration
Through truss bridge over Otter Creek, 4.2 mi. north of Cedarvale
Open to traffic

Otter Creek Covered Bridge (Ripley County, Indiana)
Built 1884 by Thomas A. Hardman; closed to traffic 1996
Covered bridge over Otter Creek on CR 850 West
Open to pedestrians only

Ouachita River AR 27 Bridge (Montgomery County, Arkansas)
Lost through truss bridge over the Ouachita River on AR 27
No longer exists

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

Owens Creek Main City Road Bridge (Cass County, Missouri)
Built ca. 1940
Pony truss bridge over Owens Creek on Main City Road
Open to traffic

Owens Ditch Bridge (Benton County, Indiana)
Built ca. 1920
Pony truss bridge over Owens Ditch on CR 225 North
Open to traffic

Owens Mill Bridge (Cedar County, Missouri)
Built ca. 1910 by the Canton Bridge Co.
Through truss bridge over Bear Creek on CR 1801
Open to one-lane traffic

Owl Creek Bridge (Allen County, Kansas)
Built 1909
Pony truss bridge over Owl Creek, 3.4 mi. west of Humboldt
Open to traffic

Ozark Mill Bridge (Christian County, Missouri)
Two-span through truss bridge over Finley Creek on W. McCracken Street (Old US 65) in Ozark
Open to traffic

Pa Fork of Fish Creek Bridge (Marshall County, West Virginia)
Built 1924
Through truss bridge over Pa Fork of Fish Creek on US 250
Open to traffic