Ancient Amphibians Discovered in Iowa
The Bering Land Bridge
Humans Cross the Bering Land Bridge
Glaciers in Iowa
Flood Waters Collapse Bridge
Flood
Flood Waters Collapse Bridge
Time Frame: 1930
Rushing flood waters caused this concrete bridge to collapse. Notice car in the rubble. In the 21st century advances in engineering have helped Iowa's Department of Transportation avoid mishaps such as these.
Photo courtesy of the Iowa Department of Transportation
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