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Gallatin County, Kentucky, 2022:  A tugboat and its cargo leaves the locks and Markland Lock and Dam.
Lock and Dam at St. Anthony Falls in downtown Minneapolis, Minnesota, USA - Part of the Central Mississippi Riverfront Regional Park
FORT MILL, SOUTH CAROLINAUNITED STATES – May 19, 2019: Man fishing  of of the boat dock at Lake Wylie dam in Fort Mill, South Carolina.
A long exposure of a water release through 6 of the spillway gates from Nimbus Dam Sacramento, CA
Intersection of Mouse River and Zuid-Willems Canal, Bosscherveld lock, boats, houseboats and green vegetation against grey sky in background, cloudy day in Maastricht, South Limburg, Netherlands
RiviAre-des-Prairies power station
Tranquil Autumn Landscape over the O'Shaughnessy Reservoir Dam in Dublin, Ohio, USA
Closed sluice downstream of reservoir
River cruise boat entering Lock and Dam 22 on Mississippi river
Spillway waters flowing into reservoir. Desnogorsk reservoir of Smolensk power station, Russia
Overhead Shot of Dam and Lock on the Ohio River
Welland Canals Parkway and Welland Canal Lock view, St. Catharines, Canada.
Wheeler Dam, AL, 2020: Wheeler Dam is 72 feet high and stretches 6,342 feet across the Tennessee River.
View of water gates used to control flow of water through the California Aqueduct, as is flows southward.\n\nTaken near Los Banos, California
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.
Aerial view closed canal lock gates different water surface levels at Miraflores Locks part of Panama Canal crossing.
Aerial view of Winfield lock and Dam on the Kanawha River Winfield West Virginia photograph taken Sept 2007
Aerial view of a hydroelectric power station on the river.
Shadows cast on the No 12 Lock Dam
St. Catharines, Canada.
Winfield Locks and Dam in Eleanor West Virginia
Conowingo, USA - January 20, 2018. The Conowingo Dam in the lower Susquehanna River, Maryland, USA
An autumn fog sits above the Mohawk River at the Mohawk Valley Welcome Center in Fultonville, NY.  Previously known as the Lock E-13 Living History Rest Area, the welcome center is located off the New York State Thruway.
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.
Greenup Lock and Dam
Branson, Missouri, USA. 4 June 2023. Road along the Table Rock Dam in Branson, with a phone mast
Wheeler Dam, AL, 2020:Wheeler has two locks, one 110-by-600 feet and the other 60-by-360 feet. They lift and lower barges as much as 52 feet between Wheeler and Wilson reservoirs.
hydroelectric power station, water gate
Aerial View Conowingo Hydroelectric Dam Maryland
Ship leaves lock, Esna locks, Esna, River Nile, Egypt. Originally constructed during the Ptolemaic era to control the flow of the Nile, it preserves and stores water for agriculture and improves navigation, Esna Lock and weir barrage connect the upper and lower parts of the river and are essential for transportation of passengers in river cruise ships and for freightThe River Nile has always and continues to be a lifeline for Egypt. Trade, communication, agriculture, water and now tourism provide the essential ingredients of life - from the Upper Nile and its cataracts, along its fertile banks to the Lower Nile and Delta. In many ways life has not changed for centuries, with transport often relying on the camel on land and felucca on the river
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