A sluice gate in a dam is lifted half its height to allow drawdown of an impoundment. The gate measures 4.00 feet wide by 6.25 feet high. The impoundment water surface is 12.72 feet above the bottom...

A sluice gate in a dam is lifted half its height to allow drawdown of an impoundment. The gate measures 4.00 feet wide by 6.25 feet high. The impoundment water surface is 12.72 feet above the bottom of the gate opening. The discharge coefficient, c, for the gate is 0.77. Find the discharge.