Abandoned Railroad Bridge (Tolland County, Connecticut)
Built 1951
Concrete arch bridge over Abandoned Railroad on US 6 in Bolton
Open to traffic

Acushnet River Bridge (Bristol County, Massachusetts)
Built 1900; rehabilitated 1997
Swing bridge over Acushnet River on US 6 in Fairhaven
Open to traffic

Allegheny River Bridge (Potter County, Pennsylvania)
Built 1934; rehabilitated 1981
Pony truss bridge over Allegheny River on US 6 in Coudersport
Open to traffic

Berlin Court Ditch US 6 Bridge (Elkhart County, Indiana)
Built 1931; rehabilitated 1986
Concrete arch bridge over Berlin Court Ditch on US 6 in Nappanee
Open to traffic

Black River US 6 Bridge (Lorain County, Ohio)
Built 1939; rehabilitated 1988
Bascule bridge over Black River on US 6 in Lorain
Open to traffic

Brightman Street Bridge (Bristol County, Massachusetts)
Built 1906; rehabilitated 1981
Bascule bridge over Taunton River on US 6 (Brightman Street) in Fall River
Open to traffic

Cahoon Creek US 6 Bridge (Cuyahoga County, Ohio)
Built 1932
Closed-spandrel arch bridge over Cahoon Creek on US 6 in Bay Village
Open to traffic

Camp Creek Old US 6 Bridge (Polk County, Iowa)
Built 1922
Arch bridge over Camp Creek on Old US 6 in Mitchellville
Open to traffic

De Beque Bridge (Mesa County, Colorado)
Built 1945
Two-span through truss over Colorado River on the I-70 Frontage Road (Old US 6)
Open to traffic

Delaware River Bridge (Pike County, Pennsylvania)
Built 1939
Truss bridge over Delaware River on US 6 in Matamoras
Open to traffic

Des Plaines River US 6 Bridge (Will County, Illinois)
Built 1934; rehabilitated 1987
Bascule bridge over Des Plaines River on US 6 in Joliet
Open to traffic

Detroit-Superior High Level Bridge (Cuyahoga County, Ohio)
Built 1917; rehabilitated 1965
Steel arch bridge over Cuyahoga River on US 6/20 in Cleveland
Open to traffic

Doan Brook Bridge (Cuyahoga County, Ohio)
Built 1932
Stone arch bridge over Doan Brook on US 6 in Cleveland
Open to traffic

Dolly Cole Brook Bridge (Providence County, Rhode Island)
Built 1932
Concrete arch bridge over Dolly Cole Brook on US 6 in Foster
Open to traffic

Dotsero Bridge (Eagle County, Colorado)
Built 1934-35
Through truss bridge over Colorado River on the I-70 Service Road (Old US 6) at Dotsero
Open to two-lane traffic

Eagle River Bridge (Eagle County, Colorado)
Built 1933
Through truss bridge over Eagle River on US 6 east of Eagle in Eagle
Open to traffic

Elk Creek US 6 Bridge (Garfield County, Colorado)
Built 1933
Pony truss bridge over Elk Creek on US 6 in New Castle
Open to traffic

Euclid Creek US 6 Bridge (Cuyahoga County, Ohio)
Built 1902
Closed-spandrel arch bridge over Euclid Creek on US 6 in Euclid
Open to traffic

French Creek Bridge (Erie County, Pennsylvania)
Built 1928; replaced 2006
Lost through truss bridge over French Creek on US 6 (Perry Highway)
Replaced by a new bridge

French Creek Bridge (Crawford County, Pennsylvania)
Built 1901 by Massillon Bridge Co.; rehabilitated 1986
Through truss bridge over French Creek on US 6 (Main Street) in Cambridge Springs
Open to traffic

French Creek Bridge (Crawford County, Pennsylvania)
Built 1934; rehabilitated 1983
Through truss bridge over French Creek on US 6 (Cussewago Street) in Venango
Open to traffic

French Creek Bridge (Crawford County, Pennsylvania)
Through truss bridge over French Creek on US 6 (French Creek Parkway) in Cambridge Springs
Open to two-lane traffic

Gypsum US 6 Bridge (Eagle County, Colorado)
Built 1933; replaced 1999
Lost pony truss bridge over Eagle River on US 6 at Gypsum
Replaced by a new bridge

Hudson River Bridge (Rockland County, New York)
Built 1924; rehabilitated 1977
Suspension bridge over Hudson River on US 6 in West Point
Open to traffic

Kingsbury Creek US 6 Bridge (La Porte County, Indiana)
Built 1932; rehabilitated 1941
Concrete arch bridge over Kingsbury Creek on US 6
Open to traffic

Kiowa Creek US 6 Bridge (Morgan County, Colorado)
Built 1936; rehabilitated 1959
Wooden bridge over Kiowa Creek on US 6
Unknown status

Mills Creek US 6 Bridge (Erie County, Ohio)
Built 1894 by G.W. Doerzbach
Stone arch bridge over Mills Creek on US 6 in Sandusky
Open to traffic

Neversink River Bridge (Orange County, New York)
Built 1929
Through truss bridge over Neversink River on US 6 in Port Jervis
Open to traffic

Ponaganset River Bridge (Providence County, Rhode Island)
Built 1933
Concrete arch bridge over Ponaganset River on US 6 in Foster
Open to traffic

Porter Creek US 6 Bridge (Cuyahoga County, Ohio)
Built 1937 by D.H. Overman and C.P. Smith
Concrete arch bridge over Porter Creek and Park Drive on US 6 in Bay Village
Open to traffic

Price River Bridge (Carbon County, Utah)
Built 1952; rehabilitated 1976
Concrete arch bridge over Price River on US 6
Open to traffic

Red Canyon Bridge (Eagle County, Colorado)
Built 1933; replaced 2001
Lost through truss bridge over Eagle River on US 6, 6.5 mi. east of Eagle
Replaced by a new bridge

Tunnel No. 1 (Jefferson County, Colorado)
Built 1951
Tunnel on US 6 west of Golden
Open to two-lane traffic

Tunnel No. 2 (Jefferson County, Colorado)
Built 1941
Tunnel on US 6 west of Golden
Open to two-lane traffic

Tunnel No. 3 (Jefferson County, Colorado)
Built 1957
Tunnel on US 6 west of Golden
Open to two-lane traffic

Tunnel No. 5 (Clear Creek County, Colorado)
Built 1939
Tunnel on US 6 in Clear Creek Canyon
Open to two-lane traffic

Tunnel No. 6 (Clear Creek County, Colorado)
Built 1939
Tunnel on US 6 in Clear Creek Canyon
Open to two-lane traffic

Vermilion River US 6 Bridge (Erie County, Ohio)
Built 1928 by the Fort Pitt Bridge Works; rehabilitated 1986
Through truss bridge over Vermilion River on US 6 in Vermilion
Open to traffic

Wallkill River Bridge (Orange County, New York)
Built 1931; rehabilitated 1980
Deck truss bridge over Wallkill River on US 6
Open to traffic