Category:1970s bridges in Indiana
 20th-century bridges in Indiana: ← 1900s-1910s-1920s-1930s-1940s-1950s-1960s-1970s-1980s-1990s →
|
States of the United States: Alabama · Arizona · Arkansas · California · Colorado · Connecticut · Florida · Georgia · Idaho · Illinois · Indiana · Iowa · Kansas · Kentucky · Louisiana · Maine · Maryland · Massachusetts · Michigan · Minnesota · Mississippi · Missouri · Nebraska · New Hampshire · New Jersey · New York · Ohio · Oregon · Pennsylvania · South Carolina · Tennessee · Texas · Washington · West Virginia · Wisconsin – Washington, D.C.