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Hoover Dam is what is called an arch-gravity dam. The name curved-gravity dam or arched dam might also be applied. This type of dam uses a curve or arch which has it's apex or "top" directed ''against'' the force of the water it is retaining. This sets up a condition wherein the water will compress the dam against the sides to which it is anchored. Less material fill is required to hold this dam in place compared to a simple gravity dam. Use the link below to learn more. Another link will show lots of images of this and other dams of the same type.

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14y ago

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