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' 1 ...�-.�_..=----=. _ <br /> . . CIT'r OF E�.-�RE`r'�`•- DRAIDIAG� P�d SU9?d?S3IOP" � .. <br /> N��I� OF AYPLICAtdT:- Centurv SQr��ice Corporation � ` <br /> . , >.ic <br /> t1DDRiSS OF t�}'PLI^;Id`P:- � 410 West Fifth Avenue <br /> [ll�yj� Washinqton 98502 _... <br /> SUB`IIITTED BY:- Grant and Associates Inc. <br /> :J <br /> PROPER`l'Y� LOCIITIOId:- � yth �idP Rrnadv�av CLMff (SL e HWy No. 71 <br /> __just west of S�i��g?nq_Mall. Assessof-'s parcef � <br /> ... . _ . .Nb. 3-06. - - . . <br /> ZONPiIG OE' ST`d'E'.:- ;�ommercial AREA OF S:C`.t.'E:- 1 ,3g Ac <br /> AREA OF COPIT'dIBU:?'I[v'G CATCI�9EN^:- 3800 Ft.Z• 0.087 A�(Parking lot) <br /> . . , <br /> R[TIvOFF COEFFiCILnT:-_. _ <br /> - PRE-DE`TELOPN�NT . ' 0.30 Q=0.052 (20 min.? ' <br /> . POST D�;�IFLOPMFPI`.�' � 0.90 <br /> • DESIGN STORPd:- � . <br /> PI?E-DE�LOP�'L�;ivT FRE2UENCY � 1 in. 100 yrs. � <br /> POSm DEVELOP,�IGNT FREf1T7ENC'l 1 in. 100 yrs. <br /> piIRATIOPc 20 minutes <br /> I[�`i"t�;NSZ`m' . . . :_0 in/hr. <br /> TOTAL DESIGiv RUP±UFF ?�R034 SI�!'E:- . . • <br /> BEFO� ,AE��LO�i:i::PiT 59.9 c, feet _ <br /> AF'�'ER D��IELOP,�I�;T 179.5 c. .feet <br /> RUNOPF �IE�'si:Z�P�`!'Ie1L:- ��y.R c.. feet <br /> AllDITI0DIAL 5`.�'ORelC.E DUi TO LAG m..'Ttii'�;_ , p c. feet <br /> Assume tc = 0.58 mm <br /> DE`►'SNTION STORl�GE YROPOSLD:- 125 c, feet <br /> Plan provides 50' x 5' x 72" gravef ea: -side of•area; V�= 2'Z3'6 x 5'J—lZ5°a) <br /> ' ORIE'IC� OPF.TI�I('.:- _' 125 cu. ft. . . . <br /> DI�L'�T��F.R _ N/q inohes <br /> DISCHARG.: N�p cuhic feet per second <br /> HEAD _ N�A � feet . . <br /> OUTLET PIPr.:- :� . " ' - .• ---- -- <br /> DIAt+�'Fr.R N/A lnches <br /> SLOFE N/A feet per hundred Peet <br /> CAPACIT�' cub=c Peet per second <br /> SIG�ATUtZ�s OF A-''PT.IC�It�T:- /� . . DA'�'�;- � �� /��J <br /> , -, � <' <br /> ���1 �`7���y,(� . . . c�. <br /> Wl��/F�,Y✓� � �nnv/ �N�Y/y .K'Y'U/� �P, ' <br /> - � , <br /> DEP�1RTi�IENT OF PiJHL.TC �=totucs ���ovnL Y1�.4I3 ATo. � <br /> ���ON SI`PE DE'_�NTIODi RE�iJ�L�•LT:DITS:- . . C. feet <br /> DR�lINAGE PI,�IN AP��OV?SD RY:- DATF,:- <br />