Bailwick Road Bridge (Fairfield County, Connecticut)
Built 1970
Concrete arch bridge over Byram River on Bailwick Road in Greenwich
Open to traffic

Barton Bridge (Clackamas County, Oregon)
Built 1970
Steel through arch bridge over Clackamas River on Bakers Ferry Road
Open to traffic

Branch Waco Creek Bridge (Matagorda County, Texas)
Built 1970
Steel arch bridge over Branch Waco Creek on Morrow Avenue in Waco
Open to traffic

Campus Drive Bridge (Racine County, Wisconsin)
Built 1970
Concrete arch bridge over Wind Point Creek on Campus Drive in Wind Point
Open to traffic

Dibble Hill Road Bridge (Litchfield County, Connecticut)
Built 1970
Steel arch bridge over Mill Brook on Dibble Hill Road in Cornwall
Open to traffic

Durnam Road Bridge (Gallatin County, Montana)
Built 1970
Truss bridge over Gallatin River on Durnam Road
Open to traffic

Fink Creek Foot Bridge (Gilmer County, West Virginia)
Built 1970
Suspension bridge over Fink Creek
Open to pedestrians only

Giles Road Bridge (Sarpy County, Nebraska)
Built 1970
Pony truss bridge over an unnamed stream on Giles Road, 2 mi. north and 2.6 mi. east of Gretna
Open to traffic

Hoquiam River Bridge (Grays Harbor County, Washington)
Built 1970
Vertical lift bridge over Hoquiam River on US 101 in Hoquiam
Open to traffic

Intracoastal Waterway Bridge (Jefferson County, Texas)
Built 1970
Through truss bridge over Intracoastal Waterway on TX 82 in Port Arthur
Open to traffic

Leeville Bridge (Lafourche Parish, Louisiana)
Built 1970
Vertical lift bridge over Bayou Lafourche on LA 1 at Leeville
Open to traffic

Little Pond Creek Bridge (Jackson County, West Virginia)
Built 1970
Deck truss bridge over Little Pond Creek on CR 2/2
Open to traffic

Live Oak Canyon Road Bridge (San Bernardino County, California)
Built 1970
Deck truss bridge over Live Oak Creek on Live Oak Cyn Road in Redlands
Open to traffic

Markley Ranch Road Bridge (Gallatin County, Montana)
Built 1970
Truss bridge over Gallatin River on Markley Ranch Road
Open to traffic

Miller Branch Bridge (Saunders County, Nebraska)
Built 1970
Pony truss bridge over Miller Branch on a township road, 2.4 mi. east and 3 mi. south of Weston
Open to traffic

Mississippi River I-280 Bridge (Scott County, Iowa)
Built 1970
Steel through arch bridge over Mississippi River on I-280 in Davenport
Open to traffic

Otoe Creek Bridge (Saunders County, Nebraska)
Built 1970
Pony truss bridge over Otoe Creek on a county road, .5 mi. south and 2 mi. west of Leshara
Open to traffic

Park Entrance Road Bridge (San Juan County, Washington)
Built 1970
Concrete arch bridge over Paul Creek on Park Entrance Road at Moran State Park
Open to traffic

Power Canal Bridge (Chippewa County, Michigan)
Built 1970; rehabilitated 1987
Steel through arch bridge over Power Canal on Business I-75 in Sault Ste. Marie
Open to traffic

Sand Creek Bridge (Ottawa County, Michigan)
Built 1970
Concrete arch bridge over Sand Creek on 32nd Avenue
Open to traffic

South Branch Papillion Creek Bridge (Sarpy County, Nebraska)
Built 1970
Through truss bridge over South Branch Papillion Creek on 168th Street, 3 mi. east and 3.2 mi. north of Gretna
Open to traffic

Unnamed Stream Bridge (Cedar County, Nebraska)
Built 1970
Pony truss bridge over an unnamed stream on a county road, 7 mi. south and 1 mi. west of Obert
Open to traffic

US 41/45 Pedestrian/Bicycle Overpass (Waukesha County, Wisconsin)
Built 1970; First Cable-stayed bridge built in the United States
Cable-stayed bridge over US 41-US 45 on Water St. in Menomonee Falls
Open to pedestrians/bicycles

West Portage Avenue Bridge (Chippewa County, Michigan)
Built 1970; rehabilitated 1988
Steel through arch bridge over Power Canal on West Portage Ave. in Sault Ste. Marie
Open to traffic