Laserfiche WebLink
d'~, <br />~f <br />DETERMINATION OF SEDIMENT VOLUME, SETTLING VOLUME <br />AND TOTAL STORAGE VOLUME OF SEDIMENTATION PONDS <br />c. t, <br />Hydraulic Length = 22 U 3 _ Feet =~' 209 t. <br />Equivalent Drainage Area = `~~•~ Acres 1 Fig. 7 ; TP-1491 <br />~'os>J, llaaCOn a~av}BTitah ,inc. a-sF o6 <br />SITE PREPARA 710N & DRAINAGE <br />Iwarwsr aa~cowstauctowa STANDARD FORM REV. 1 <br />a~lT uar CRY, VTaM <br />RUNOFF & SEDIMENT CALCULATIONS 9/BO <br />$HT. G~7 OF 12 <br />PROJECT ~VES"rESCtJ FVEL3 t~ESESS~7o /ni~.`E JOBNO.UL-3a~- <br />REFusE 42EA e 2 POND NO. <br />BV . ~~ w'- DATE `7 - ZZfi ° CHECKED BY _ DATE _ <br />6. Peak Rate of Discharge -Used to Design Emergency Spolway, Road Culverts and Interceptor Ditches <br />Drainage Area = ~~~' ~ ~ Acres <br />L <br />Average Watershed Slope = 14.(v. °; <br />Weighted Watershed Runoff Curve Number = C 3.5 <br />~{ <br />1 <br />A. Peak Rate of Dixharge From Charts ES-1026, ES-1027, TP-149 <br />Rainfall Frequency = IU Years Rainfall Depth = ~ ~ ~ Indtes <br />O11For EO RCN1) =DIES 102]. for ~?=E '}_ scopes) x Scope Correction Factor (Ex. 2-Ol <br /> <br />= 23.7 x o.9~ = 23.21 cfs <br />02(For BS RCN21= 4U.o x U.9`] = 3`j,LO cfs <br />Equivalent Discharge = ~"~.~0 cfs (Interpolate Between Ol and 021 <br />Actual Peak Discharge =Equivalent Discharge x Actual Drainage Area <br />Equivalent Drainage Area <br />Actual Peak Discharge - ?'~ -10 x 1 30~ L 1 . ZU.9 ds <br />'SL'.-I <br />Note: Ql and D2 above refer to runoff resulting from RCN's to nearest 5 (60, 65, 70, etc.l <br />If computed RCN ends in 0 or 5 (60, fi5, 70, etc.1 , 02 and the next line will not <br />be needed. In this ease, 01 runoff will be the equwalent Discharge. Refer to , <br />SCS•TP-149 and Engineering Field Manual, Chapter 2. <br />Type I Storm distribution ES-1026: Hawaii, Alaska coastal side of Sierra Nevada <br />and Cascade Mountains in California, Oregon and Washington. <br />Type 11 Storm distribution ES-1027: rest of United Statss, Puerto Rico, and <br />the Virgin Iflands. <br />~~ I r <br />~C~ / <br />ioSo <br />