High Level Bridge (Marion County, West Virginia)
Built 1921; rehabilitated 2000
Concrete arch bridge over Monongahela River on Jefferson Street (CR 19/73) in Fairmont
Open to traffic

Holme Avenue Bridge (Philadelphia County, Pennsylvania)
Built 1921
Concrete arch bridge over Wooden Bridge Run on Holme Avenue in Philadelphia
Open to traffic

Howards Creek Bridge (Greenbrier County, West Virginia)
Built 1921
Truss bridge over Howards Creek on CR 60/87 in White Sulphur Springs
Open to traffic

Howell Creek CR 9030 Bridge (Howell County, Missouri)
Built 1921
Wooden bridge over Howell Creek on CR 9030
Open to traffic

Huerfano Bridge (Pueblo County, Colorado)
Built 1921; rehabilitated 1948
Five-span arch bridge over Huerfano River on US 50
Open to traffic

Hurricane Creek Old IL 4 Bridge (Macoupin County, Illinois)
Built 1921
Concrete bridge over Hurricane Creek on Old IL 4 north of Carlinville, 2.5 mi. north of Carlinville
Open to traffic

Jack Run Bridge (Harrison County, West Virginia)
Built 1921
Concrete arch bridge over Jack Run on CR 24/1 in Clarksburg
Open to traffic

Jones Road Bridge (Lorain County, Ohio)
Built 1921 by the Jones Brothers Structural Steel Company; rehabilitated 1939
Pony truss bridge over Charlemont Creek on TR 5 (Jones Road) in Wellington
Open to traffic

Kansas Avenue Bridge (Wyandotte County, Kansas)
Built 1921; rehabilitated 1978 and 2007
Deck truss bridge over Kansas River on Kansas Avenue in Kansas City
Open to four-lane traffic

Kincheloe Creek Bridge (Lewis County, West Virginia)
Built 1921
Concrete arch bridge over Kincheloe Creek on CR 10/10
Open to traffic

Kishacoquillas Creek Bridge (Mifflin County, Pennsylvania)
Built 1921; rehabilitated ca. 1955
Concrete arch bridge over Kishacoquillas Creek on PA 3001 in Lewistown
Open to traffic

Lake Creek Bridge (Delta County, Texas)
Built 1921
Pony truss bridge over Lake Creek on CR 4620
Open to traffic

Laurel Creek Bridge (Van Buren County, Tennessee)
Built 1921; rehabilitated 1983
Arch bridge over Laurel Creek on NFA A015
Open to traffic

Liberty Street Bridge (Clay County, Missouri)
Built 1921
Arch bridge over Wilkerson Creek on Liberty Street near Smithville
Open to traffic

Lincoln Highway Bridge (Chester County, Pennsylvania)
Built 1921
Concrete arch bridge over East Branch Brandywine Creek on Lincoln Highway in Downingtown
Open to traffic

Lion Canyon Creek Bridge (Ventura County, California)
Built 1921
Concrete arch bridge over Lion Canyon Creek on CA 150
Open to traffic

Little Chucky Creek Bridge (Greene County, Tennessee)
Built 1921
Arch bridge over Little Chucky Creek on NFA A988 in Greeneville
Open to traffic

Little Conemaugh River Bridge (Cambria County, Pennsylvania)
Built 1921; rehabilitated 1977/1984
Through truss bridge over Little Conemaugh River on PA 271 in East Conemaugh
Open to traffic

Little Sandy River Bridge (Boyd County, Kentucky)
Built 1921; replaced 1999
Lost pony truss bridge over East Fork Little Sandy River on Meade Springer Road
No longer exists

Little Shenango Bridge (Mercer County, Pennsylvania)
Built 1921; rehabilitated 1960
Concrete arch bridge over Little Shenango on North Race Street in Greenville
Open to traffic

Little Toms Fork Bridge (Doddridge County, West Virginia)
Built 1921
Concrete arch bridge over Little Toms Fork on CR 13
Open to traffic

Little Youghiogheny River Bridge (Garrett County, Maryland)
Built 1921
Concrete arch bridge over Little Youghiogheny River on MD 39 in Bethel
Open to traffic

Lizard Creek Bridge (Palo Alto County, Iowa)
Built 1921
Pony truss bridge over Lizard Creek on a local road
Open to traffic

Local Road Bridge (Greene County, Iowa)
Built 1921; rehabilitated 1939; replaced 2002
Lost pony truss bridge over an unnamed creek on a local road
No longer exists

Locust Creek Bridge (Pocahontas County, West Virginia)
Built 1921
Concrete arch bridge over Locust Creek on CR 20
Open to traffic

Lookout Creek Bridge (Dade County, Georgia)
Built 1921; replaced 2002
Lost pony truss bridge over Lookout Creek on Sulphur Springs Road
No longer exists

Lost Creek Bridge (Jefferson County, Tennessee)
Built 1921
Arch bridge over Lost Creek on NFA A145 in New Market
Open to traffic

Lost River IN 37 Bridge (Orange County, Indiana)
Built 1921; rehabilitated 2001
Concrete arch bridge over Lost River on IN 37
Open to traffic

Lower Run Bridge (Doddridge County, West Virginia)
Built 1921
Concrete arch bridge over Lower Run on CR 52
Open to traffic

Main Street Bridge (Allen County, Indiana)
Built 1921; rehabilitated 1997
Three-span arch bridge over St. Marys River on Main Street in Fort Wayne
Open to traffic

Manor Road Bridge (Travis County, Texas)
Built 1921; rehabilitated 1960
Stone arch bridge over Boggy Creek on Manor Road in Austin
Open to traffic

Maple River Bridge (Cherokee County, Iowa)
Built 1921; rehabilitated 1942; replaced 2001
Lost pony truss bridge over Maple River on a local road
No longer exists

Maple River Bridge (Cherokee County, Iowa)
Built 1921
Pony truss bridge over Maple River on a local road
Open to traffic

Mattese Creek US 61 Bridge (St. Louis County, Missouri)
Built 1921; rehabilitated 1933; replaced 2003
Lost closed-spandrel arch bridge over Mattese Creek on US 61 in Concord
Replaced by a new bridge

Maxwell Creek Bridge (Lamar County, Texas)
Built 1921
Pony truss bridge over Maxwell Creek on CR 24280
Open to traffic

McGilvray Road Bridge No. 5 (La Crosse County, Wisconsin)
Built 1921 at El Paso in Pierce County; relocated here in 1996-97
Relocated pony truss bridge on McGilvray Road
Open to pedestrians only

Middle Branch Park River Bridge (Walsh County, North Dakota)
Built 1921; rehabilitated 2002
Pony truss bridge over Middle Branch Park River on a county road, 3 mi. east and 8 mi. north of Park River in Glenwood Township
Open to traffic

Middle Creek Bridge (Adams County, Pennsylvania)
Built 1921
Open-spandrel arch bridge over Middle Creek on PA 3001 (Old US 15)
Open to traffic

Middle River Bridge (Adair County, Iowa)
Built 1921
Pony truss bridge over Middle River on a local road
Open to traffic

Mill Creek Bridge (Reynolds County, Missouri)
Built 1921; abandoned ca. 2002; razed 2004-05
Lost concrete slab bridge on CR 360 (Old MO 21) over Mill Creek east of Lesterville
No longer exists

Mill Creek Bridge (Walla Walla County, Washington)
Built 1921; rehabilitated 1968
Concrete arch bridge over Mill Creek on Park Street in Walla Walla
Open to traffic

Mill Creek Bridge (Seneca County, New York)
Built 1921
Concrete arch bridge over Mill Creek on CR 136A in Lodi
Open to traffic

Mineral Springs Road Bridge (Wayne County, Indiana)
Built 1921
Greens Fork on Mineral Springs 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

MN 30 Bridge (St. Louis County, Minnesota)
Built 1921
Concrete arch bridge over Creek on MN 30 in Biwabik
Open to traffic

Mott Bridge (Hettinger County, North Dakota)
Built 1921; replaced 1982
Lost two-span rainbow arch bridge over North Fork Cannonball River on First Street in Mott
Replaced by new bridge

Mud Creek Bridge (Brown County, South Dakota)
Built 1921
Bedstead pony truss bridge over Mud Creek on a county road, 2 mi. east and 2.4 mi. south of Stratford
Open to traffic

Muddy Creek Bridge (Greene County, Pennsylvania)
Built 1921
Concrete arch bridge over Muddy Creek on PA 88 in Fairdale
Open to traffic

Nacimiento Lake Drive Bridge (Monterey County, California)
Built 1921
Through truss bridge over San Antonio River on Nacimiento Lake Drive
Open to traffic

Nine Mile Creek Bridge (Onondaga County, New York)
Built 1921; replaced 2001
Lost concrete arch bridge over Nine Mile Creek on NY 174
No longer exists

Nine Mile Creek Bridge (Oneida County, New York)
Built 1921
Concrete arch bridge over Nine Mile Creek on CR 88
Open to traffic

North Avenue Viaduct (Milwaukee County, Wisconsin)
Built 1921; Replaced 1991
Lost Open-spandrel arch bridge over Milwaukee River on E North Avenue in Milwaukee
Replaced by new bridge

North Branch Little Mahoning Creek Bridge (Indiana County, Pennsylvania)
Built 1921
Concrete arch bridge over North Branch of Little Mahoning Creek on PA 1038 in Oak Hills
Open to traffic

North Branch Thunder Bay River Bridge (Alpena County, Michigan)
Built 1921; replaced 2002
Lost pony truss bridge over North Branch Thunder Bay River on Wikaryasz Road
No longer exists

North Elm Street Bridge (Guilford County, North Carolina)
Built 1921
Concrete arch bridge over North Buffalo Creek on North Elm Street in Greensboro
Open to traffic

North Fork Solomon River Bridge (Norton County, Kansas)
Built 1921
Pony truss bridge over N. Fork Solomon River, 4.0 mi. east of Lenora
Open to traffic

North Road Bridge (Oxford County, Maine)
Built 1921; rehabilitated 1991
Through truss bridge over Androscoggin River on North Road in Gilead
Open to traffic

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

Northeast Creek Bridge (Cecil County, Maryland)
Built 1921
Concrete arch bridge over Northeast Creek on MD 7C
Open to traffic

Old Lincoln Highwy Bridge (Bucks County, Pennsylvania)
Built 1921
Concrete arch bridge over Neshaminy Creek on Old Lincoln Highwy
Open to traffic

Onpratt Trail Bridge (Winnebago County, Wisconsin)
Built 1921
Stone arch bridge over Lake Winnebago on Onpratt Trail in Oshkosh
Open to traffic

Opie Road Bridge (Somerset County, New Jersey)
Built 1921
Pony truss bridge over South Branch Raritan River on Opie Road
Open to traffic

Orcas-Olga Road Bridge (San Juan County, Washington)
Built 1921
Concrete arch bridge over Cascade Creek on Orcas-Olga Road
Open to traffic

Otter Creek Bridge (Louisa County, Iowa)
Built 1921
Pony truss bridge over Otter Creek on a local road
Open to traffic

Paint Creek Bridge (Kanawha County, West Virginia)
Built 1921
Through truss bridge over Paint Creek on CR 83/3
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

Parrish Avenue Bridge (Lake County, Indiana)
Built 1921
Lost pony truss bridge over Bruce Ditch on Parrish Avenue
No longer exists

Parvin Road Bridge (Lane County, Oregon)
Built 1921; rehabilitated 1986
Covered bridge over Lost Creek on Parvin Road
Open to traffic

Pawtuxet River Bridge (Providence County, Rhode Island)
Built 1921; rehabilitated 1986
Concrete arch bridge over Pawtuxet River on RI 117 in Cranston
Open to traffic

Pea River Bridge (Dale County, Alabama)
Opened Aug. 3, 1921
Concrete arch bridge over Pea River on US 231
Open to pedestrians only

Pike Run Bridge (Washington County, Pennsylvania)
Built 1921
Concrete arch bridge over Pike Run on PA 2036 in Centerville
Open to traffic

Pine Creek Road Bridge (Allegheny County, Pennsylvania)
Built 1921
Concrete arch bridge over Pine Creek on Pine Creek Road in McCandless Township
Open to traffic

Pine Street Bridge (Delaware County, Pennsylvania)
Built 1921; rehabilitated ca. 1950
Concrete arch bridge over Darby Creek on Pine Street in Darby
Open to traffic

Piscataqua River Bridge (Rockingham County, New Hampshire)
Built 1921; rehabilitated 1982
Vertical lift bridge over Piscataqua River on US 1 in Portsmouth
Open to traffic

POC over Fern Dell Creek (Los Angeles County, California)
Built 1921; rehabilitated 1927
Wooden POC
Open to Pedistrians

Pond Creek Bridge (Pottawatomie County, Oklahoma)
Built 1921
Through truss bridge over Pond Creek on N3320
Open to traffic

Portsmouth Road Bridge (Saginaw County, Michigan)
Built 1921; rehabilitated 1930
Concrete arch bridge over Cheboyganing Creek on Portsmouth Road in Buena Vista
Open to traffic

Poultney River Bridge (Rutland County, Vermont)
Built 1921
Pony truss bridge over Poultney River on C2003 in West Haven
Open to traffic

Prickett Creek Bridge (Marion County, West Virginia)
Built 1921
Concrete arch bridge over Prickett Creek on CR 80/8
Open to traffic

Pulaski Highway Bridge (Baltimore, Maryland)
Built 1921; rehabilitated 1932
Concrete arch bridge over Herring Run on Pulaski Highway in Baltimore
Open to traffic

Pyles Fork Bridge (Marion County, West Virginia)
Built 1921
Concrete arch bridge over Pyles Fork on CR 6
Open to traffic

Raccoon River Bridge (Sac County, Iowa)
Built 1921
Pony truss bridge over Raccoon River on a local road
Open to traffic

Redwood Drive Bridge (Humboldt County, California)
Built 1921
Concrete arch bridge over Bear Gulch on Redwood Drive
Open to traffic

Reppy Avenue Bridge (Gila County, Arizona)
Built 1921 by the Topeka Bridge Co.
Luten arch bridge over Bloody Tanks Wash on Reppy Avenue in Miami
Open to traffic

Republican River Bridge (Republic County, Kansas)
Built 1921
Through truss bridge over Republican River, 1.0 mi. south and 1.0 mi. west of Republic
Open to traffic

Reservoir Spillway Bridge (Providence County, Rhode Island)
Built 1921
Concrete arch bridge over Reservoir Spillway on RI 12 in Scituate
Open to traffic

Riley Road Bridge (Price County, Wisconsin)
Built 1921; rehabilitated 1970
Pony truss bridge over North Fork Jump River on Riley Road
Open to traffic

Rio Grande Avenue Bridge (Vigo County, Indiana)
Built 1921; rehabilitated 1980
Concrete arch bridge over North Branch Otter Creek on Rio Grande Avenue
Open to traffic

Rock Creek Bridge (Jasper County, Iowa)
Built 1921; replaced 2004
Lost pony truss bridge over Rock Creek on a local road
No longer exists

Rock Creek Bridge (Carbon County, Montana)
Built 1921
Through truss bridge over Rock Creek on CR 112
Open to traffic

Rock Creek Bridge (Skamania County, Washington)
Built 1921
Concrete tee beam bridge over Rock Creek on Rock Creek Drive in Stevenson
Open to traffic

Rockriver Road Bridge (Alger County, Michigan)
Built 1921
Pony truss bridge over Rock River on Rockriver Road
Open to traffic

Rocky Creek Bridge (Limestone County, Texas)
Built 1921
Pony truss bridge over Rocky Creek on Tyler Road (CR 786)
Open to traffic

Rocky River Bridge (Chatham County, North Carolina)
Built 1921; rehabilitated 1959
Through truss bridge over Rocky River on NC 1953
Open to traffic

Roosevelt Blvd. Bridge (Philadelphia County, Pennsylvania)
Built 1921; rehabilitated 1964
Concrete arch bridge over Poquessing Creek on US 1 (Roosevelt Blvd.) in Philadelphia
Open to traffic

Rooting Creek Bridge (Harrison County, West Virginia)
Built 1921
Concrete arch bridge over Rooting Creek on CR 52/2
Open to traffic

Rooting Creek Bridge (Harrison County, West Virginia)
Built 1921
Concrete arch bridge over Rooting Creek on CR 52
Open to traffic

Round Lick Creek Bridge (Wilson County, Tennessee)
Built 1921
Two-span arch bridge over Round Lick Creek on NFA 2036
Open to traffic

Rudolph Run Bridge (Greene County, Pennsylvania)
Built 1921
Concrete arch bridge over Rudolph Run on PA 2001
Open to traffic

Rugby Road Bridge (Charlottesville, Virginia)
Built 1921
Arch bridge over C&O Railway on Rugby Road in Charlottesville
Open to traffic