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Roller dam - Wikipedia
Roller Dam across the Mississippi River between Davenport, Iowa and Rock Island, Ill.
Gateways to Commerce: The U.S. Army Corps of Engineers' 9-Foot Channel Project on the Upper Mississippi River (Chapter 7)
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Roll Off Water Dams | Quick Dams
Roll Off Water Dams | Quick Dams
Opening the dam gates on the Mississippi River | wqad.com
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American Whitewater
The Worlds largest Roller Dam, Lock and Dam no. 15 on the Mississippi River and Government Bridge - YouTube
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Grand Valley Diversion Dam - Wikipedia
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Roller dam - Wikipedia
Gateways to Commerce: The U.S. Army Corps of Engineers' 9-Foot Channel Project on the Upper Mississippi River (Chapter 7)
