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Little Canada Zoning Code Stormwater Management <br /> 928-10 <br />Table 3 – Flood Control and Freeboard Requirements <br />Condition Water Bodies with Piped <br />Outlets <br />Water Bodies without <br />Piped Outlets Subsurface Stormwater Management BMPs <br />New Habitable <br />Buildings <br /> Low floor must be a <br />minimum of 2 feet <br />above the 100-year <br />flood elevation. <br /> Low floor must be a <br />minimum of 2 feet <br />above the back to <br />back 100-year flood <br />elevation. <br /> Low floor must be a minimum of 2 feet <br />above the 100-year flood elevation or one <br />foot above the emergency overflow <br />elevation unless flood proofing measures <br />are constructed with the building. <br /> Low opening must be a minimum of 2 feet <br />above the 100-year flood elevation or one <br />foot above the emergency overflow <br />elevation. <br />Existing Habitable <br />Buildings – Adjacent <br />to and Potentially <br />Affected by Flood <br />Waters <br /> Low opening must be <br />a minimum of 2 feet <br />above the 100-year <br />flood elevation. <br /> <br /> Low opening must be <br />a minimum of 2 feet <br />above the back to <br />back 100-year flood. <br /> Low floor must be a minimum of 2 feet <br />above the 100-year flood elevation or one <br />foot above the emergency overflow <br />elevation unless flood proofing measures <br />are constructed with the BMP. <br /> Low opening must be a minimum of 2 feet <br />above the 100-year flood elevation or one <br />foot above the emergency overflow <br />elevation. <br />Underground <br />Parking Structures <br /> Low opening must be <br />a minimum of 2 feet <br />above the 100-year <br />flood elevation. <br /> <br /> Low opening must be <br />a minimum of 2 feet <br />above the back to <br />back 100-year flood <br />elevation. <br /> <br /> Low opening must be a minimum of 2 feet <br />above the 100-year flood or one foot above <br />the emergency overflow elevation. <br /> <br />Public Roadway <br /> Roadway shall not <br />flood when adjacent <br />to stormwater storage <br />basin designed to <br />store the 100-year <br />storm event. <br /> 2 foot Freeboard <br />requirement <br /> Roadway shall not <br />flood when adjacent <br />to stormwater storage <br />basin designed to <br />store the back to back <br />100-year storm event. <br /> 2 foot Freeboard <br />requirement <br /> Roadway shall not flood when adjacent to <br />stormwater storage basin designed to store <br />the 100-year storm event. <br /> 2 foot Freeboard requirement <br /> <br /> <br />c. For water bodies without a piped outlet: <br /> <br />(1) The normal water level of a water body without a piped outlet shall <br />be determined by a qualified licensed geologist or hydrogeologist. <br />A ground water analysis using existing or installed monitoring <br />wells on or near the site and soil conditions in the basin shall be <br />used. Ideally, the peak groundwater elevation over a continuous <br />three-year monitoring period shall be considered the normal water <br />level of a basin without a piped outlet, provided soil conditions <br />allow full drainage of recent storm event within 48 hours.