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r . .. <br /> The secondary orifice must be sized so that the combined discharge from the secondary <br /> orifice and the 1 inch primary orifice is equal to the City's allowable detention release <br /> rate when water in the pond has reached the overflow elevation. <br /> * * * <br /> If the applicant prefers, I will use City spreadsheets to perform the routing calculations <br /> and to size the orifices, since the King County software the applicant is using is not <br /> ideally suited to performing calculations to meet City of Everett wetpond design <br /> standards. I would need the following information to perform these calculations: <br /> 1) the pond\vault's elevation to surface area relationship, in order to generate the <br /> stage-storage volume relationship for the routing calculations <br /> 2) the City's allowable release rate from this site and required detention volume, as <br /> determined using the City's drainage calculation tables <br />