ABSTRACT Please insert a as per journal style:This discussion paper is regarding the values of coefficient of discharge (Cd) and submergence (S) of a vertical type of sluice gate mounted on a broad casted weir. Discusser has used open channel specific energy principles justifying the values of Cd found by the author theoretically. Discusser has furnished the experimental values of Cd for a vertical type and tainter type gates. Discusser has also added the experimental values of Cd under free and submerged flow conditions in a model study for Salal dam spillway. An innovative proportional type flow meter developed by the discusser has been furnished for flow measurement within a given flow range.