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...Dreischluchtendamm hauptwall 2006.jpg|thumb|right|280px|The [[Three Gorges Dam]] in China, the [[List of the largest hydroelectric power stations|largest [[Image:Hydroelectric dam.svg|thumb|right|230px|Hydroelectric dam in cross section]]

...e wide end down onto a level, non-absorptive surface. It is then filled in three layers of equal volume, with each layer being tamped with a steel rod in or ...ses shrinkage and cracking. Strength of concrete changes (increases) up to three years. It depends on cross-section dimension of elements and conditions of