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.,� <br /> ••�. <br /> o C� C� C�.� d L� - -:- -- <br /> _ — _-. - �. �� « « D <br /> �u� u s �z�a <br /> . ncainage cato�c <br /> - .....................,......,. <br /> CITY OF �EVERET`T„�� <br /> i . P�rmft Servicee <br /> ; i. ' PROJECT OVER VIEW. <br /> ; This project proposes the construction of approximately <br /> ' . 3400 SF Building on 1.49 Ac. lot with associated parking <br /> sp�ce. <br /> 2. EXISTING DRAINAGE CONDITIION. <br /> I Existing surface water sheet flow to the catch basin on north <br /> west comer of the pazking lot and from there to City drainage <br /> system. <br /> On Evergreen Way approximately 20% of existing surface <br /> flow to exist;ng drainage system on the South West of the <br /> property. ' <br /> ,r 3. PROPOSED DRAINACE. � � <br /> Dsveloped run off is conveyed to wet pond with flow <br /> control man holes and released to existing Pigeon Creek No.l <br /> drainage system. <br /> 4. SLOPE OF ENGINEERING ANALYSIS. <br /> 1) The peak de��eloped dischazge rate for the 2-yeaz, 24-hows <br /> storm shall not exceed 50% of the peak runoff rate for the <br /> same storm and existing site conditions, with a correction <br /> factor applied; and <br /> 2) The peak stormw�ater developed discharge rates for the 10- <br /> years and 100-years, 24-liour storms sh�l norexceed the peak <br /> runoff rate for the same storm and existing site conditions, <br /> , , <br /> with a correction factor applied. <br /> i <br /> i <br /> f <br /> � .� . . . . � <br /> ,.�_ , .. . . - <br /> � ..�..,..�r ��!:4`� , <br />