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<br />~L~ ~dC011 d~dVd0 ~i11h : ~RC. 4-SF-0G <br />umwaawa-cowarwucroR• SITE PREPARATION & DRAINAGE REV. 0 <br />•~si uwa crir, urww STANDARD FDRNt <br />fi L'NOfF & SE DIh1ENT CALCU LATIGNS 7f79 <br />SHT. S OF 0 <br />DETERMINATION OF SEDIMENT VOLUME, SETTLING VOLUME <br />AND TOTAL STORAGE VOLUME OF SEDIh1ENTATION PONDS <br />PROJECT lAI'~iJ:PI ..~'•:'` ~ ':'s., C~•e-_•.~_" :~r,•IE -- ~~-- JOR ND. 'L_'.__- __. <br />_1-IA~aL_1Z>P.D_ /1-lC~t't, iE.- ": ~, t'I T... --- ---- P~Att) N0. --~~~{ ~ - <br />BV LL LAn-_„~_ DaTE ?_F7_ '~~n ?9 =_C_CHECKED 9v _ ---DA iE --.-- --- -- - <br />6. Peak Rete of Discharge ~ Used to Cesryn Emeiyr:¢y Spdh:r„~;, Rnad ;;ulverts and Interceptor Ditches <br />Drainage Area= =_~.`J'__ Acres <br />Hydraulic Length= 1120 _ Fret <br />Equivalent Drainaye Area = ~L- Acres (Fiq 7 ; TP-1491 <br />Average Watershed Slope = _~_- "o ~' ~ ~ ~ ~= ~-ovE = 3.5: ~ 1 <br />Weighted Watershed Runoff Curve Nunaxr = __. ~~ ~Ai•!r rs~ ,vt _~.V _~~%~orar a~r~.:. <br />A. Peak Rate of Discharge From Chaas ES~1026. ES'1027, TP.I d9 <br /> <br />Rainfall Frrquency = _I J .. Vears Raintdl Utplh - I . ~ _ Inches <br />U11For~Q _. RCN1i =DIES ih2_for r<o:-gp,r=~::nucsl z Slope Correction Factor IEx. 201 <br /> <br />021For.__-RCN21= _ x .. ---. _ _ ---.~~.-~~_-_ cfs <br />Egwvalent Discharge = _ ~'1 ~_ __ cts (Imerpolate Re r; reen Dl find 02; <br />Actual Drainage Area <br />Actual Peak Disdiarye = Eywvalant Luchary~; z -- <br />EV'uivalent Drainage Arya <br />Actual Peak Discharge -~-''~ ~ r. I ~' `f' -) _ -~2~_ c1s <br />i i.~ <br />Note: Ot and O above rofer to runoff re wltinp from RCN's to nearer[ 5 (60, u'6, 70, etc.l <br />If computed NCN ends in 0 or 5 160, 55, 70, etc.l , 02 and tho nett line will not <br />be needed. In this case, 01 -unofl will he the equivalent Discharge. Rafer to <br />SCS~TP~140 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 II Storm drstribution E5~1027: rest of Unified States, Puerto Rico, and <br />the Virgin Islands. <br /> <br /> <br />T ye~~ nrira~~ <br />