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� .. . ,, STRUCNRAL DESIGN ASSOCIATES, INC. <br /> 5630 • 198th St. S.�Y. — P.O. Box 5;,66 <br /> Lynnanod, 1NA 98036 — Tel: 775•1434 <br /> _ : � ,: <br /> ; .,,,... <br /> � RL!N <br /> ( STORM WATER DETENTION SYaTEM <br /> j JOP N0.? 81483 CITY PRNK EVERGREEN �1AY <br /> i LENGTHr WIDTH (FT) OF PROPERTY? 141� 135 <br /> � MAX. FLOW DISTANCE (FT) :? 182 <br /> FROM TABLE 1: RUN-OFF FACTOR 'C:exist. ' :? . 15 <br /> FROM FIGol: VELOCITI: (FPS) :? 3.6 <br /> THE AREA IS .4365'84 ACRES <br /> THE TIME OF CONCF_NTRATION 'T:C' IS 10.8426 MINUTES <br /> FfiOM FIG. 2 FIND INTENSITY ' I' :? 1.8 ' <br /> THE ALLOWAHLE OUTFLOW I� . 117986 CFS <br /> ---------------------------------------------------- <br /> FROM TAHLE 1: RUN-OFf` FACTOR 'C:dev' :? .67 <br /> TI-fE INFL04J 'Q:o' IS .4029D5 CFS <br /> ENTER DESIGn STORM FREQUENCY (50�25 OR 10 YFtS) ? 10 <br /> THE RER'D STORAGE VOLUME IS 468.067 CU.FT <br /> FIPE,OPEN DITCH� OR SURFACE STORAGE? ENTER 'P' � 'D' QR ' S'? S <br /> LENGTH, WIDTH OF HAFtD SURFACE STORAGE FlftEA? 6n�30 <br /> THE MIN. DEPTH OF THE SURFACE STORAGE IS: .62409 FEET <br /> WANT TD CHANGE CD�IFIGURATION ? (Y/N?? IV <br /> ----------------•------------------------------------ <br /> F{EIGHT OF WATER COLUMN AFDVE Of�IFICE (FT)? 4.5 <br /> THE MAX.DIAMETER �F THE ORIFICE IS 1.�3�1332 INCHES <br /> FROM FSG, 1: VELOCITY 'V:DEV' :? 5.2 <br /> THE DURATION IS 10.5833 MIN. <br /> FROM FIr.2: ENTER ' I' :? 1.8 <br /> THE: FILLING TIME IS �7. 802B MINUTES <br /> FRUM FIG.2: ENTEF INTENSITY ' I' :? 1, 1 <br /> ENTER HEIGHT OF WATER COLUMN ABOVE RISER (FT)? .B <br /> TIiE MIN. RISER PIPE DIA. IS 3.7C�266 INCHES <br /> DIArlETER OF CONCRETE DISCHARGE PIPE tIN(:HES)? 8 <br /> THE MIN.SLOPE OF THE DI!3CHARGE PIPE IS .�).`i41977 % <br /> READ`� <br /> . <br /> i <br /> i <br /> � - - <br />