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Chain of Rocks on the Mississippi RIver above St Louis with the Low Water Dam, water towers and old historic bridge
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A series of locks and dams on the Upper Mississippi River, like this one at Dubuque, Iowa, were built in the 1930s to facilitate commercial navigation and control floods.
A lock on a man-made tributary diverting water from the natural river to the east  to overcome the annual variances in water depth on the river in order to maintain the shipping trade along the Mississippi River in the central United States.  This aerial view is just outside of St. Louis, Missouri on the Illinois side of the river.
Image of Aerial brown truss arch bridge over dam in Ohio River white water rapids Louisville city skyline
Barge on the Mississippi River in Hannibal, Missouri
Done shot of The Blue Water Bridge in Port Huron Michigan
The McAlpine Dam is in the Ohio River between Kentucky and Indiana.
An aerial view of Lock and Dam number 11, Eagle point park, Dubuque, Iowa, United States
Aerial view of John Day Dam spanning the Columbia River in Oregon, Washington, USA.
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Chaudière Falls Viewing Area on Ottawa River,Canada
Aerial of Greenup Lock and Dam on Ohio River Greenup Kentucky
I-90 and Lewis and Clark Memorial Bridge in Chamberlain, South Dakota, USA.
Overhead Shot of Dam and Lock on the Ohio River
The water overflows the circular reservoir dam
View of parking lots, tran track, and Mississippi River, in Davenport, Iowa, USA
Oude IJsselbrug or Katerveerbrug bridge over the river IJssel near the city of Zwolle in Overijssel, The Netherlands. Aerial drone point of view.
Barge entering the Wilson Lock in Florence, AL
A canal along the Mississippi River  near St. Louis with locks to control the depth of the river to maintain year-round shipping capabilities from the northern states through to the Gulf of Mexico.
Low Water Dam and a rapid on the Mississippi River below Chain of Rocks with St Louis, Missouri, on the horizon
A Calm Mississippi River in Morning Light in Minneapolis, Minnesota.
A scenic view of a town and dam along the Mississippi River during autumn.
Historic bridges over the Susquehanna River with a remote view on Downtown Harrisburg, Pennsylvania.
Lock and Dam 13 on the Arkansas River in the winter time with snow
Aerial drone shot of Victoria Island, Ottawa River, Gatineau and Ottawa downtown
Overlooking the town of Bellevue and the Mississippi River on a Summer afternoon.  Bellevue, Iowa, USA
This high-resolution photo shows the Eidersperrwerk, a flood protection dam located on the Eider river in Germany. The massive concrete structure stands tall against the backdrop of a clear blue sky, with the calm waters of the river flowing behind it. The Eidersperrwerk serves as a vital component of the region's flood control system, protecting the surrounding communities from the dangers of rising water levels. This photograph would be a suitable addition to any project related to civil engineering, flood prevention, or infrastructure.
Aerial of US 82 over the Mississippi at Greenville Mississippi.  View from southeast looking to northwest.  Full view of bridge.
View of water gates used to control flow of water through the California Aqueduct, as is flows southward.\n\nTaken near Los Banos, California
Free Images: "bestof:Mississippi River bridge dam Davenport LOC ppmsca 17351.jpg TITLE Mississippi River dam 15 general view of completed dam view from top of Clock Tower building"
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