Posted by IS 6515 – 1984 is an Indian Standard Code that stipulates the Criteria for Design of Concrete Gravity Dams. Concrete Gravity Dams resist the water pressure by their self weight. That’s why they are called the Gravity Dams.
Download IS 6512 – 1984 with this link
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IS 5186 – 1994 [Design of Chute and Side Channel Spillways]
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Criteria for Selection of a Dam Site