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Kimley»>Horn <br />Water Quantity <br />The project's preliminary designed stormwater management system provides adequate <br />storage for the proposed conditions. Through the use.of exfiltration trench and drainage <br />wells, the proposed system is designed to reduce runoff volume and meet the water quantity <br />criteria for the design storm event below (see [CPR model and calculations in Attachment A). <br />Water Quality Criteria — Design Storm Events <br />10-Year, 1-Day Rainfall <br />The post -development runoff from a storm event with duration of 1-day and 10-year return <br />frequency should be completely retained within the proposed stormwater system below the <br />adjacent roadway elevations. <br />Through a preliminary ICPR model and calculations, the maximum stage for the previously <br />mentioned storm event can be seen below: <br />Storm Event <br />Required Max Stage (NGVD) <br />Provided Max Stage (NGVD) <br />10 Year — 1 Day <br />7.60 <br />7.32 <br />Conclusion <br />The drainage analysis indicates that the proposed exfiltration trench and drainage well system <br />can provide the required water quantity needed for the proposed development. The drainage <br />wells provide sufficient storage to prevent discharge and staging above the max elevation <br />requirement set forth from a 10-Year 1-Day storm event. Based on this preliminary drainage <br />analysis, the results indicate that the proposed development of the Miami Beach Club project <br />will have no adverse impacts to the neighboring adjacent parcels. <br />Please contact me at (954) 626-8818 or Jeff.Reynolds@kimlev-horn.com should you have any <br />questions or clarifications. <br />Sincerely, <br />Kimley-Horn and Associates, Inc. <br />Jeffrey J. Reynolds, P.E. <br />56 <br />