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I <br /> EvCC <br /> � Topper <br /> Pro'ect Lot Sheet <br /> Job M 2U8221 1 <br /> C B JAS 12/5/2008 <br /> I <br /> IBasin Cf31 25-yr <br /> Runoff <br /> I Ralional Melhod Calculations C= 0.801 coetiicien[ <br /> Peak <br /> Rainfal I <br /> � 1= 2.453 Intensily <br /> � � : A= 0.4284 Drainage Basin (acres) <br /> � Slorm Duralion= 25 <br /> Calculations <br /> for I <br /> � P= 3.05 <br /> Tc= 6.3 Time of Concenlration <br /> a��= 2.66 <br /> Ib��= 0.65 <br /> I <br /> INotes and nssumptions: <br /> I From Chap�er 3 of the !<C Sur(ace <br /> I Waler Design Manual <br /> ! <br />� I <br /> I <br /> I <br /> ( <br /> Stormwatcr Sile Plan O Q OO <br /> I Everett Community Colicge . <br /> Topper Parking Lo[ 10 <br /> 208221.10 <br /> ( �� <br />