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

Napoleon Bridge (Henry County, Ohio)
Built 1929 by D.H. Overman; replaced 2005
Lost seven-span concrete arch bridge over Maumee River on OH 108 at Napoleon
Replaced by a replica bridge

Neff's Mill Covered Bridge (Lancaster County, Pennsylvania)
Built 1875
Covered bridge over Pequea Creek on Penn Grant Road
Open to traffic

Neosho River Bridge (Neosho County, Kansas)
Built 1954
Through truss bridge over Neosho River, 0.4 mi. west of Shaw
Open to traffic

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 (Lyon County, Kansas)
Built ca. 1930; replaced 2001
Lost through truss bridge over Neosho River, 4.0 mi. east of Emporia
No longer exists

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 (Lyon County, Kansas)
Built ca. 1940
Through truss bridge over Neosho River, 0.5 mi. west of Neosho Rapids
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 Bridge (Coffey County, Kansas)
Built 1926
Two-span Marsh arch bridge over Neosho River on 19th Road, 0.2 mi. east of Hartford
Open to traffic

Nepesta Bridge (Pueblo County, Colorado)
Built 1905-06 by the Pueblo Bridge Co.; replaced 1989
Lost two-span through truss bridge over Arkansas River on Nepesta Road (CR 613) southeast of Boone
Replaced by a new bridge

Nevins Covered Bridge (Parke County, Indiana)
Built 1920 by J.A. Britton
Covered bridge over Little Raccoon Creek on CR S130E
Open to traffic

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 Madrid County Road 626 Bridge (New Madrid County, Missouri)
Built 1954; rehabilitated 1986
Wooden deck bridge over Otter Slough Ditch on CR 626 southwest of Matthews
Open to one-lane traffic with a 13 ton weight limit

New Madrid County Road 630 Bridge (New Madrid County, Missouri)
Built 1966; rehabilitated 1995
Wooden deck bridge over Ash Slough Ditch on CR 630 at Route AE
Open to one-lane traffic

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

New Steelbridge Rd. Bridge (Dawson County, Georgia)
Built 1980
Bridge over Amicalola Creek on Steelbridge Rd.
Open to traffic

Newport Covered Bridge (Vermillion County, Indiana)
Built 1885 by J.J. Daniels; rehabilitated 1983
Covered bridge over Little Vermillion River on CR 50 North
Open to traffic

Nichols Street Bridge (Callaway County, Missouri)
Built ca. 1940
Wooden bridge over the KCS Railroad on Nichols Street at the William Woods University campus in Fulton
Open to two-lane traffic

Nineveh Bridge (Adair County, Missouri)
Built 1885; replaced 1989
Lost through truss bridge over Old Channel Chariton River on CR 175 east of Connelsville
Replaced by a concrete bridge

Ninnescah River Bridge (Sumner County, Kansas)
Built 1962
Through truss bridge over Ninnescah River, 2.0 mi. east and 3.8 mi. south of Belle Plaine
Open to traffic

Noakes Bridge (Nodaway County, Missouri)
Built 1891-92 by the St. Joseph Bridge & Iron Co.; replaced 1991
Lost through truss over One Hundred and Two River on 130th Street (CR 156) southwest of Hopkins
Replaced by a concrete bridge

Norris Ford Bridge (Rush County, Indiana)
Built 1916 by E. L. Kennedy
Covered bridge over Flatrock River on CR 300 North
Open to traffic

North Big River Bridge (St. Francois County, Missouri)
Built 1924; made obsolete by new bridge in 1956
Through truss bridge over Big River on Old US 67 (Berry Road) north of Bonne Terre
Open to one-lane traffic

North Boat Ditch Bridge (Clark County, Arkansas)
Built ca. 1928
Through truss bridge over North Boat Ditch on CR 8
Open to one-lane traffic

North Branch Root River Bridge (Fillmore County, Minnesota)
Built 1939
Through truss bridge over North Branch Root River on CR 124
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 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 River Bridge (Madison County, Iowa)
Built ca. 1920; rehabilitated 1967
Through truss bridge over North River on a local road
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 Wea Creek Bridge (Miami County, Kansas)
Built ca. 1920
Pony truss bridge over North Wea Creek, 2.2 mi. north and 2.0 mi. west of Louisburg
Open to 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

O'Neal Bridge (Independence County, Arkansas)
Built ca. 1933, possibly by the Works Progress Administration
Small five-span closed-spandrel arch bridge over O'Neal Creek on O'Neal Road (CR 37)
Open to traffic

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

Oats Creek Bridge (Jackson County, Arkansas)
Built 1929; replaced 2005
Lost three-span concrete arch bridge over Oats Creek on Bradford Road (CR 1)
No longer exists

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

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

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 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 Cannons Lane Bridge (Jefferson County, Kentucky)
Built ca. 1960
Concrete arch bridge over Middle Fork Beargrass Creek on Old Cannons Lane in Louisville
Open to traffic

Old Erie Canal Bridge (Carroll County, Indiana)
Built 1901
Stone arch bridge over Old Erie Canal on Bicycle Bridge Road in Delphi
Open to traffic

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 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 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 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 Route E Bridge (Newton County, Missouri)
Built 1922; made obsolete by bridge on new alignment in 1974
Five-span arch bridge over Shoal Creek on Old Route E, northwest of Granby
Open to traffic

Old Rudy Way Bridge (Crawford County, Arkansas)
Built 1940 by the Works Progress Administration
Stringer bridge with stone piers over an unnamed creek on Old Rudy Way (CR 19) just off AR 282 at Rudy
Open to traffic

Old Scotland Bridge (Boone County, Indiana)
Built 1901
Three-span stone arch bridge over Sugar Creek on CR 200E
Open to traffic

Old US 50 Viaduct (Cooper County, Missouri)
Built 1924
Tee beam bridge over the Union Pacific Railroad on Old US 50, just north of current US 50
Open to traffic

Olena Road Bridge (Arkansas County, Arkansas)
Built 1936
Small arch bridge over a drainage ditch on Olena Road (CR 402)
Open to one-lane traffic

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

Opossum Hollow Bridge (Fountain County, Indiana)
Built ca. 1920
Concrete arch bridge over Opossum Hollow on CR 1300 North
Open to traffic

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

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

Oronoco Bridge (Olmsted County, Minnesota)
Built 1918; rehabilitated 1987. Originally replaced an iron truss bridge built by Horrace E. Horton
Open-spandrel arch bridge over Zumbro River on CSAH 18 at Oronoco
Open to traffic

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 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 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

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 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 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

Oxly Military Road Bridge (Ripley County, Missouri)
Built ca. 1930
Wooden deck bridge over Logan Creek on CR 142E-30 (Old Military Road), just south of Oxly
Open to one-lane 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

Paint Creek Bridge (Fayette County, Ohio)
Built 1928; rehabilitated 1960
Truss bridge over Paint Creek on Old US 35
Open to traffic

Paint Creek CR 150E Bridge (Carroll County, Indiana)
Built 1903
Pony truss bridge over Paint Creek on CR 150 East
Open to traffic

Paoli Pike Bridge (Floyd County, Indiana)
Built 1921
Two-span concrete arch bridge over Little Indian Creek on Paoli Pike
Open to traffic

Papinville Bridge (Bates County, Missouri)
Built 1884 by the Kansas City Bridge & Iron Co.; bypassed by new bridge in 1995
Closed through truss bridge over Marais des Cygnes River just west of Papinville
Closed to all traffic

Paradise Creek Bridge (Russell County, Kansas)
Built 1917
Stone arch bridge over Paradise Creek, 1.0 mi. east and 2.0 mi. south of Paradise
Open to traffic

Paradise Creek Bridge (Russell County, Kansas)
Built 1935
Stone arch bridge over Paradise Creek, 1.0 mi. south and 0.5 mi. east of Paradise
Open to traffic

Paradise Creek Bridge (Russell County, Kansas)
Built 1901
Stone arch bridge over Paradise Creek
Open to traffic

Parkdale Bridge (Fremont County, Colorado)
Built ca. 1915
Pony truss bridge over Arkansas River near Parkdale on CR 157 just off US 50
Open to traffic

Parr's Mill Covered Bridge (Columbia County, Pennsylvania)
Built 1865
Covered bridge over Roaring Creek on Parrs Mill Road, south of Catawissa
Open to traffic

Patoka River Bridge (Orange County, Indiana)
Built 1884
Through truss bridge over Patoka River on CR 850 South
Open to traffic

Patoka River Bridge (Orange County, Indiana)
Built 1888
Through truss bridge over Patoka River on CR 180 East
Open to traffic

Patoka River Bridge (Orange County, Indiana)
Built 1885; rehabilitated 1992
Through truss bridge over Patoka River on CR 700 South
Open to traffic

Patterson Bridge (Wayne County, Missouri)
Built ca. 1922
Two-span pony truss bridge over Clark Creek near Patterson on CR 312 (Old MO 34)
Open to traffic with a 21 ton limit on a paved road

Paup's Spur Bayou Old US 67 Bridge (Miller County, Arkansas)
Built 1929 by contractor McGuire & Cavender. Made obsolete 1954 by a new parallel alignment of US 67.
Concrete bridge over Paup's Spur Bayou on CR 138 (Old US 67) northeast of Texarkana
Open to traffic on a frontage road

Pawnee Creek Bridge (Bourbon County, Kansas)
Built 1929
Through arch bridge over Pawnee Creek, 4.0 mi. north and 2.4 mi. east of Hiattville
Open to traffic

Peace Valley Road Bridge (Sharp County, Arkansas)
Built 1936
Small two-span arch bridge over an unnamed creek on Peace Valley Road (CR 46)
Open to traffic

Pedro Bridge (Benton County, Arkansas)
Built 1922
Through truss bridge over Illinois River on CR 196 between US 412 and Old AR 68
Closed to traffic

Pee Wee Reese Road (Jefferson County, Kentucky)
Built ca. 1930
Concrete arch bridge over Middle Fork Beargrass Creek on Pee Wee Reese Road in Louisville
Open to traffic

Perry County Road 838 Bridge (Perry County, Missouri)
Built 1905; reconstructed 1986
Bedstead pony truss bridge over a branch of Saline Creek on CR 838
Open to traffic

Perry County Road 950 Bridge (Perry County, Missouri)
Small stringer bridge with stone abutments over an unnamed creek on CR 950 south of St. Mary
Open to one-lane traffic

Petticoat Lane Bridge (Orange County, New York)
Built 1884 by the Groton Iron Bridge Co.
Through truss bridge over Shawangunk Kill on Petticoat Lane, northeast of Bloomingburgh
Open to traffic

Phantom Canyon No. 1 Tunnel (Fremont County, Colorado)
Built 1894 by the Florence and Cripple Creek Railroad
Tunnel on CR 67 (Phantom Canyon Road) north of Florence
Open to one-lane traffic

Phantom Canyon No. 2 Tunnel (Fremont County, Colorado)
Built 1894 by the Florence and Cripple Creek Railroad
Tunnel on CR 67 (Phantom Canyon Road) north of Florence
Open to one-lane traffic