<br />6 <br /> <br />Braewood Hills | KPFF Consulting Engineers <br />STORMWATER ANALYSIS <br />Precipitation data for the respective storms are City of Eugene design storms are shown in Table 1 below. <br /> <br />TABLE 1: 24-Hour Precipitation for Eugene, OR (NOAA Atlas 2, Volume X) <br />Storm Event Inches <br />WQ 1.56* <br />2-Year 3.23* <br />5-Year 3.6 <br />10-Year 4.46 <br />25-Year 5.18 <br />50-Year 6.0 <br />100-Year 6.48 <br />*Updated to match SLOPES V & DEQ Storm Values, increased from storm events defined in the SWMM <br /> <br />See Appendix 3 for Water Quality Calculations and Appendix 4 for Detention Calculations. <br />Engineering Conclusions <br />Based on the requirements of the Stormwater Management Manual, no errors were found in the stormwater <br />system design. The facilities and conveyance components have enough capacity to handle the required storm <br />events and should be approved as designed. <br /> <br /> <br />2100216-kg <br /> <br /> <br />