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� Trepanie� Ensineer�n� <br /> Pro%ssional Civil En in <br /> 9 eeiing ' <br /> , ( t ' � • � <br /> C6DARGL6N APARTM6NTS ' Lr '� �� � , � <br /> z-is-so ' 4 �`� � � � ' <br /> y � <br /> 11 (`t il C • - 1 <br /> ,f 1 ' , <br /> DOWNSTRSAM ANALYSIS <br /> THfi PROPOSSD DRAINAQfi COLLECTION SYST6M FOR CSDAI�GLSN <br /> APARTM6NTS IS D6SIGNSD TO DRAIN INTO THfi 6XISTINfi CATCN <br /> BASIN TITLfiD EX. CB A ON THB PLANS. TNIS CATCH BASIN HAS �A <br /> TOP OF 657 .61 AND AN INVfiRT OF 652. 21 , <br /> DISTANCfis0EA150 FESTNATBp SL PSUOF 2�18XfiWH6R6 ITRRhACH6S <br /> ANOTHSR CATCH BASIN WITNIN TH6 ADJAC6NT AYARTMSNT COMPLEX. <br /> TH6 CAPACITY OF THIS PIPfi IS CALCULATED TO H6 1 . 04 CFS, <br /> TN6 PIPfi THEN RUNS TO TH6 SOUTH FOR A DISTANCfi OF 59 FEfiT AT <br /> A SLOPS OF 2.07� WH6RE IT R6ACH6S ANOTHSR CATCH BASIN. THS <br /> CALCULATfiD CAPACITY OF THIS 8" CMP Iu 1.23 CFS. <br /> FROM THIS CATCH BASIN, THS 8" CMP TH6N RUNS ANOTHSR 30' <br /> SOUTH UNTIL IT R6ACHES A RSSTRICTOR CATCN BASIN, THS <br /> CAPACITY OF THB PIPfi AT 3. 16X SLOPE IS 1 . 26 CFS, <br /> AETER LEAVING TH6 RESTRICTOR CATCH BASIN, THfi WATSR FLOWS <br /> THROUGH ]2" PVC FOR 10 FSST TO THE WfiST AT A SLOP6 OF 0. 3X <br /> WNSRfi IT RSACHfiS ANOTH6R CATCH BASIN, THE CAPACITY OF TNIS <br /> PIPE IS 2.27 CFS. <br /> THfi 12" PVC PIPS CONTINUfsS RUNNING TO TH6 WSST FOR A <br /> DISTANC6 OF APPROXIMATELY 69 FE&T TO THS OUTFALL. TH6 SLOPE <br /> OE THfi PIP6 IS APPROXIMATSLY 0. 85X WITH A CAPACITY OF 4 , 04 <br /> CFS. <br /> AT THE OUTFALL, THB WATER THS� CONTINU6S FLOWING TO THE WfiST <br /> BY MEANS OF A VfiRY LARGfi NAT[IRAL DRAINA�3fi SWAL6/BASIN. <br /> a ������ p <br /> FEB 7.� 1990 <br /> _............................. .... _ .... <br /> � CITY OF EVERETT <br /> Publlc Works DepL <br /> 1420 Hewitt • Everett. Washington 98201 • Everett (206)259-5556 • FAX(206)259•5558 <br />