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n dahl & <br />Rased on a curve number (CN) of 70, the runoff <br />is estimated to be 0.~4. The unit discharge <br />is 520 csm/inch. <br />Therefore: <br />Peak Discharge = 520 x 0.:~4 :: 0.824 <br />= 146 cis <br />- <br />... i-t ca:.scussinr~ ~;hou ':e prov:•,.c:=cJ o~ ~..'~e r.ispns~i~:ion enc. <br />-~v,t,erc~~ted •:i_llltrn;2 .i~f groiandw~~tt,r pc=r th:= ov•.~raJ.l fir.ai dr,r:i.n:tg~~ <br />~.a c h e~ rr~ r~~ . <br />Discharge of ground water, based on the final <br />drainage design will be very little to none, <br />except after intense periods of high moisture. <br />For instance, a 1D0 year precipitation event <br />may cause the ground to become saturated <br />resulting in a high recharge of the shallow <br />and perched ground-water system. Ultimately <br />this recharge would resurface at the discharge <br />points noted on the sheet 3 ^f 7 in the appli- <br />cation. fhe arrows indicated on sheet 3 of 7 <br />not only suggest surface water runoff, but <br />also are indicative of subsurface (perched <br />ground water) flow. <br />1.r-i. Fir a?zir•.g of I'-F"Vt:'C]E?toted aireas st'tol.tid be. Itrot~i.b>ted tu~til t:~ie <br />ve.gc-~tzat.i.on ha= had an c!ppor'tunity 'to ful'ty ~~a~~tabli•s~t itsElf.. <br />Ho~•r a.~~rll this bra r,ctomplished7 <br />No grazing will occur in the areas being mined <br />or those areas being reclaimed. Fencing will <br />separate the grazing areas fro! the sites <br />where active mining is imminent and those <br />areas that have not been released from banding <br />after being revegetated. <br />l.l.. LJhy n~t..uat tl'ier ~-W Road bi-~ r,=cnnstruc'ted -- and nca rer_l~lrnec'. <br />--- upon r~o:nhlet:,on o~f m;.na.nq':~ <br />The reconstruction is only an upgrading t^ <br />better handle the truc); traffic that is anti- <br />cipated. [t is not to 6e reclaimed as per the <br />landowner'., request. The landowner would like <br />to retain the access that currently exists to <br />his property. <br />L-:<h:i tar i:. (.i - 4!.-ite_~r- F:~~snttrc e•-~ <br />1. ?I-..= 3L~.Le• I-nyi.ntat=r-'=, Office ham bESen farwardeJ a ~:::py of tta•:, <br />at-~L+;.ic:al-..or. 14e wild si-mr-I you a cony of tl-iet.r- romrnents nnce <br />Noted. <br />10 <br />Engineering & Environmental Services <br />