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Discharge over a spillway

The formula Q = 3.32LH^3/2 is used to find the maximum water discharge over a spillway before the water overflows the main part of the dam. Q is the discharge in cubic feet per second, L is the length of the spillway, and H is the depth of the spillway below the level of the dam. Find H when Q is 3000 cu. ft. per second and L = 60 ft.

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3000 = 3.32 * 60 * H^3/2
H^3/2 = 15.06
H = 15.06 ^2/3

H = 6.10ft