Arch dam

Type of concrete dam that is curved upstream in plan / From Wikipedia, the free encyclopedia

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An arch dam is a concrete dam that is curved upstream in plan.[1] The arch dam is designed so that the force of the water against it, known as hydrostatic pressure, presses against the arch, causing the arch to straighten slightly and strengthening the structure as it pushes into its foundation or abutments. An arch dam is most suitable for narrow canyons or gorges with steep walls of stable rock to support the structure and stresses.[2] Since they are thinner than any other dam type, they require much less construction material, making them economical and practical in remote areas.

The Katse Dam, a 185 m high concrete arch dam in Lesotho.
The Morrow Point Dam is a double-curvature arch dam.
The Idukki Dam in Kerala, India is a double-curvature arch dam