Dams are so designed by well-qualified engineers to span many of the decades and also can contribute to the generation of electricity for about many years or even decades to come. You can connect me on Google +. Earth dams are suited to the sites where a masonry dam cannot be used for structural reasons. The horizontal water pressure on the dams is distributed over greater area because of greater base width and hence, the danger of sliding on a weak foundation is minimized. Disadvantages of Arch Dam. When used, the produced electricity by the dams does not even produce the greenhouse gases and also hence they do not pollute the atmosphere.

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