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<br /> <br /> <br /> <br /> <br /> <br />t <br /> <br /> <br /> <br /> <br /> <br />1 <br />"fh-~ree sedirnentatiun pon!js will be ~I,sed ire the gravel inining <br />operation and be located dir-ectl'y east of tl'~e plant site (E::hibii' <br />C). The crushing plant ha.s a water req~_iirement of ;300 gallons <br />per minute (gprn) ar~d will nperatc• 10 hours per- day. Si~iny of <br />the scdi~rrentation ponds is described as follows: <br />(-ls~ai.r~npti ons <br />F'and r~ - inflow == 3!ii) gpm i~ 10 I-~r/day = 4~Cii;nir gpd <br />= 1.:°~ ac-ft/dav <br />- wish to settle all sand, silt, and Borne clay <br />particles greater- thar-~ r~, ;i,~7~~~ rnin <br />- using 4 +t active stor-.=,ge, d_•tention 'Ci~nez equt;ls <br />dav <br />(hefere.nce: F-lauar-~ a.r~~~ Iar,=field, H~irolooy and <br />SedimentoJ,ui~.Y v±,_:3urfacy'_Mir~~_!.j_l_=:__r~.s.. Le>;in:.~ton, k:. `(: <br />II`1MF;, 19721 . <br />- Two days stor-aye = _ Eic-+'t r;f raatr-•r <br />- Concentration r_~f sediicent in in+lo!•r = ^~i_)ii mg/1 <br />- Density of ,clay = _. h`, g/g av~_•r aye <br />- Sc•dirr~errt cvccr_rrnu:Lation = C:.i~i,; ac-ft!da•/ <br />-. ii.:~5 ac-f'tiyr (10 ma = 1 yr) <br />-- Clean pond out. ev~_=rv car's - ~ ac-ft of sc-diment I <br />- F'and A S1Ze = =3l-ft_W2_Lrl'" ~`~ acres ,~~~e <br />=L ft. ar_t:ive si_orage `.-« <br />- F'al-tiJ H r_JeIJLII =_ --.:_[=TL wa_t_c-=r__+_=~ `3c-fJ<__=diinerlt_ ~~ <br />.7 ?.cr-es <br />- ~r-~cbnarci allowarr._e - ;=t. <br />- l'uta:L dcpt-i~ _= 9,6 ft _ fi: free•br_~ard + q ft <br />c~.CL1 Vi_~ G'i_. iJ Y-ayn. +' i.t_ Tt ~a?(Jlln_r..lt <br />- Total area - i,.7'S ~_.!-re- <br />- Total wat~_•r- r-~eedr~d yto .r i 1 i i'und A = ~ ac-f t <br />F'or-id Cj -- Seconda.r•/ pond rcgi_r.ir-in, .L dory deterrt';.on time:t <br />Wi=_~h-~ i:a ettle reoi;i.r~ing r_lay par-1-. i.~_.les <br />- C:ize:• of F'nnd Li :vi 11 LL~ =_c'jrne as Fond i='I - V.7`3 an•~~~~~ <br />' .-_ Depth IN1 i J. hc; tl c,i ~i- of Fpri it fi -- _. _ ~ {: <br />- i'rr=eba=~.rd all UWEince - { t <br />- Tot~il Dr_~pi:h == b. ': ft = ft fr-e_=hca.rd + ft :,c_tive <br />' - -,tor;?.gr. + 1. _; ft sradilTlent - <br />Total i7ri=a 0.7~~ acres <br />i71:_al. water neediad to Fi 1 :L I- and Lr - _.5 ac-f'L' <br />ri7n•.-j 1. - 'r OCc_SE3 P!a'i.: E?Y' i_Li~d <br />..- Liutf:Ll~~n~ ~_. 2i,i: cJl~m <br />' - i='C~ri is-s-1 l.Ll ililJ. Ci :L =~- 1-i5%r ~.f rJci ~_ul'- - :};3i~:•:l('i~l g__; 1. <br />1 ..._ _.r t <br />1- r, <br />