A grass lined earth spillway $($n $=0.035)$ is $100\mathrm{.}0$m $(328$ ft$)$ wide with $2$H:$1$V side slopes and a longitudinal slope of $0\mathrm{.}001.$ The spillway is under a head $($H$)$ of $3\mathrm{.}0$ m $(9\mathrm{.}8$ ft$).$ Compute the discharge in the Spillway if the spillway is hydraulically long $($normal depth occurs in the spillway below the entrance$).$ Use an entrance loss cost of $0\mathrm{.}3.$