Design an ogee spillway for concrete gravity dam, for the following data.

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Design an ogee spillway for concrete gravity dam, for the following data.
i) Average river bed level = 160 m
ii) Slope of D/S = 0.75 H : 1V, u/s face is vertical
iii) Spillway crest RL = 265 m
iv) Design discharge = 5530 m3/s
v) Spillway length is 6 spans with a clear length of 7 m each.
vi) Pier thickness = 2m