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<br />III IIIIIIIII IIII III <br />999 <br />RULES AND REGULATIONS <br />p:u:[rrnph. It is recognL.cd that the sla- <br />buuy yrovidcd by n bench is not LndS~ <br />m:u:s stabdily but raLhcr tcmporn R' <br />drainnKC and croslonal stability. Onc <br />rnmntrntrr recnrn:nen[icd that culverts <br />be nlluwr•1 tcmporn rtly for vNticular <br />trafi:[. This commcM again points out <br />that r`Dny pcnplC vlcu• terraces as a <br />mrar•: of nrrrss rat.hrr than for tcmpo- <br />rafy' Mnlr01 Of CrO51ml. $lIC'h mC:45ll rCS 1L5 <br />lice [t••c nC lrrt:nres to control drainage <br />nrr 1'^:'uiLtrd n4rrn approt'Cdby the reF- <br />ulaloly :rvl'wrl L:;. <br />I5. A n':mbrr of rrrommcndations <br />v'~•rr rrr^n'+1 to add a section that nd- <br />d.~r•.--1 the bac6111inq and grading rc- <br />quir~rcr•tL for Urrvinu'ly minrd•lantls. <br />Thr- rntn:nrn~rr; supgcslcd that St1Ch a <br />5^r 11 alt l5^[ ~ nPrCC^,ar}' CO address the <br />pt•oblrm of yr:uling to approximate orir,- <br />mai rnn'our u•hrn nmoh oC the Precious <br />minis.^, rlrpu :it Mt ::pail and Nastcs on the <br />rinwnfiupr and irsulTlr lent mntrrial is <br />nt^: i!thlr- far grading. Commenters indt- <br />cnt•sl that in such cases it would be dr- <br />s~rnbh` to er,rourogc rcminlug of poorly <br />n•rlnim~ rr awns sinrn LIIC run'rnt rrgu- <br />Intlnr.s a^nu ld ensure nn Improvrmcnt of <br />Inn'1 nunidt•, and nrrhaps water qualll5' <br />seer and shore UtaL left by lhr, preelou <br />minlnlt. Ataumrnts fee nn nddilimtnl src- <br />L:nn ha:C mcrlt in view of nor of lhr• Pur <br />Pocr7 aC the Art. to Promote the rrrimua <br />lion of minrrl arras IC/t wiLhnut adequat <br />rcr l:tmalion. T.lc rcgula (.inns have Bern <br />rra isrd to rrfrert the rrail!p Utat sutfi- <br />rmnt Spoil Or hrPSOd mny nM hC avallahir <br />to nchlrvr poet mining condlLions w'hlrh <br />uurt all it:r• Innd ronfigurntlon mtd co- <br />ergrtatinn rrgnirrmcn4s. SaAt oprratlonc <br />nrv• rr7air!vl to rrl.ain all overbuMrn attd <br />•;rnnl m:ltrrinl ou Lhr bench and to Frady <br />rn•`q'Irtrl? to eliminate the hie Menu nrd <br />m.'n+I. tln n st•,ulr slope. ThC rntlre min- <br />ter; Wren m;r;t br stabilized and rrvr-rr_. <br />tatr•1. Thr provl•.ion has been added col <br />47th 14rblrlt, <br />If ticcrr:a rommentcrs segued Lh.tt. <br />the Pronumd nmuntalntop removal pro- <br />vi:inns u•ma[l pcrtnit midu'csirrn oprn- <br />tions le) rcnlm•c nn entire rnal seam from <br />n hill and not n•Lurn the Innd to the np- <br />prul,~:nnlc nr4ilnsl con Lnn r. Such Changes <br />to lncrl fern[ :old use, nrr nllou'rd may <br />when the provlx~mL; of 6 515'rt of ihr <br />Art are mil.. [n nncordanrc u'Ith the Arf. <br />Lhr p.lrearn'h has been nmrndrd to indi- <br />rnLr Lhut Lhr rxrrpllon 15 gn'rtt play ltt <br />rntirs u•hrrc• crrt:dn Innd pl:uwinr, rr- <br />quirrmc•nl': and stringent Vcrforntmu'1• <br />s1.vuL•[rrls nrr met. It may bC nuthnrizrd <br />in Ilrn of Lhr approximate original rou- <br />toU r. <br />17 C('!nla:'gt: tfrir` 1'Cr'rS l'rd In(hfRtlllg <br />that. in tllp[I nl,a lnlnn rr111nCM1I ulN`rn dons <br />Lhr slnpr•: irrr'c Loo rrstric[Ivr. Other <br />rnmmr`nlor:: nbJrr•trJ that LhC stutlr <br />safety L'trtnr of L.i tens mt ttncrtKnln <br />ntr:c:urr nC n^4s; cLa b+litl'. •I7tc snfrty <br />factor i:, mt appropriate mcnsurr. of uu[ss <br />sL:Iblhly IhnL hn•: brrn steepled by Lhr <br />Corn.; of P•.ngtuceec. MFSA, and other <br />arrnrirs. (; rra lcr slopes may he used If <br />the safely fm•lnr is nchiceed and rro- <br />sional AtalJlht)' IS assured. Regulatory <br />authorities utay specify hlKhCr snfet,V <br />rnrlnrc ashen nrrre~a rv noel nrrmnrere <br />u ill be respotvslble foi [irslgn and con- <br />s--Z-rltction that Provides nu,rc stnbility. <br />16. 14xlrtLCivC comments tndicaU`d con- <br />cmn peer the apps rent rrslriclinn; on <br />lnrgc imnoundmcnls in .715.14'cl. In <br />cicu• oC Lhr, uumcrous eotumen's in Ln•or <br />of such impou ndmcnls, lhr I)'7ln rtntc r' <br />has taken guidnuce Crum the At L for rr- <br />vicw u[ Proposals for impouudutruls noel <br />pL•ICCd Lhr Innquni;c of : 51;,'h/ `er nl <br />ChC Act in S 715.17 be aulsr, it inrnlrr: <br />hydrologic criteria. Purlllrr refer^nrr 1. <br />made Ln IarL:c impouurhr.r::ts both t^ <br />tl.i; sccLIDn mtd in 5 715.I:S of Li;l^ unrl. <br />The rcei~cd Portion makes c Irar thlt t1 <br />will be nrrres;'r5' to ~n.dr nrc:~:: un'olvrd <br />in such inttAunrluutnts Lo un appropri- <br />ntC contour and th'tt all hirhe~•'IIs nt7 •1 <br />be elimimted. Section 715.1 :'ir iurlndc'. <br />tt`Jrr qU^city nerd Olllcr rr',n•li'. Vr0 <br />snot be mil IL also n:•d'rs dr;l r, :'e a <br />few cnmmen tees Uointcd not, lhnt rcid- <br />funning anti Lustc-fortnin mafirn'!. <br />c;mnoL br tnundaLed tg• e.atrrs in li:r r <br />lrtpoundmculs wtlhnnt flr[ lna^I,rnd- <br />cntly nu•clinl; the rrq'li rrmrut; (ar 1;^r- <br />ial or nrul.raliznttun of to Graph Ij' u: <br />chi. 'cc lion. I ~ - ~ <br />~ 1!I. nin!nClll':'rCCll'2C 011 LI to nrJpn.'•' <br />for shall [Leper -..loos grnrr:~::y v:plr :~ <br />llu` c~nccnt that lhv one r~~bic ~al~l 1i4.- <br />itatimt w'us peer;) rc.,u~i.t.t e. Shur :1 <br />pa raL'rgPh addrex:ing Pr nn:utrnt hn- <br />Puundmrnta t; uow iurorpunttrd ir. 111•• <br />regulallons, the halt rrmuhts al:prnlu;- <br />atc to dlslinr;uish brhercn surface ma- <br />nipulations lhnt nuisL aiLh rca'rrr::,'1un <br />and Crosion fonlrW by impour~ding ~nnll <br />amounts of water in ronhnrrl mrs: and <br />lhosa Ingro; ndwrnls that n•ay ad[rr~rlc <br />n RecL tltc urea unrl v:hlNt nn' ~, ;hrn•lnrr <br />1'0001 YC SpBCl,al cnnsclcrn ti ort by tar rrg- <br />u!ntory authority, l7uutour furroa•1u'r. <br />cnisr111 n{:, and of her norm:A ngrir'alu ..I <br />ntc:hod.: oC nL.niPUkt!ing Lf.r surfm~c :rr <br />PcnuiLtnl cvca i[ the bog luu•nr fu 'uu' <br />rxce[•ds 1 cubic yard in size This:; lino <br />i doc:~ not rnfrr Ln d^Prccsfons Ih t mar <br />bl` rilllirrl by SUli.dd C11CC oC llltdr 8i'UUIUI <br />mines. Subsirlrncr tvpj hr' ndrlr ~,ed ::' <br />II the Pr rlnanrut, i[•I;uhl my Prnrrn t:. <br />.. a'S! L'CT, c1l .o- tifiliLl d to ; ^ 1 S - <br />I1ch-'ht dcnhnl; wilJl thin and lhic l; <br />ot•crbu Men. A few cronment[•n surr.c..t ~'[i <br />the uurd "Ln n:porC' b~ rirlrtrd Lo nvcud <br />movruteut of material such n•. tlrst r•1r <br />spoils back into LhC mlur, seen, Jr, is aP- <br />pngrcluLr Lrt iudicntr LhnL nmlrti;ils mny <br />have W be LrnnsnurLCd Lo nrhirvr bnrk- <br />Illling and r•ttdinr,. <br />Yl. Sou.^ r•mtcrrn tent expressed m•rr <br />the d4;Llnrtion hcbvrrn Lhi,t nod Ihlrh <br />overburden. C•t Pm'tic'.I I•[r, rcv:rivrr•s tvrr•• <br />eoncrnlyd that not Nl operations nu•r[- <br />Ing the rrl term for lhlrk and Lhiu oerr- <br />burcirn nrrtlyd n mudiflcnlirnt of Lhr rr- <br />qulrcment to nchlCVe Chr npproxlmalr <br />original contour. Thr rcKUla buns hove <br />been revlscd Lo requlrc 1 hot whether Chh1 <br />or Lhlrk overburden condltlons rx11.t. oP- <br />ernLlons must achieve npProxlmate urb:- <br />hull contour whenever possible. <br />2^. A number oC commentCrs htdir•alyd <br />that Ute nnglc [. repose Ix not ahcny's <br />stable. It is recognized that the average <br />angle of repose of Catch material Is trot <br />o,^•n n~ dn61n to ler„+. n1 ~~n~inn R1...~ <br />a m[:,Or cD <br />n:nrir In r Lr. <br />:uxl cru. Irn' <br />inc." ha. hr • <br />"grad;n•• nr , <br />l1tC Acl .1 1 <br />'SG Prrcrl', <br />u'nll nlup~•, <br />tl'a~ !'lq }th ' <br />Rrru: .tnrv <br />97. .nllr (rl• <br />:.tituh•••• u' <br />11 .r' r.~l. . <br />Stan` 'hr ' , <br />noel u•':'.:• 1 <br />u~r", tr h n <br />t', n rr,r~: . <br />Fu•..•'nrd 1 • <br />non.. •'rt.i' <br />a';1lr+nt~ <br />'1 \I'. <br />rl• ,. , <br />r.ll' :~nr', r <br />lhr ,,., ti.~•" <br />in Cltl'. •~ r <br />tail 1 r,. r.1 <br />D t.u`y a1 " <br />l': n^lJ 1:.'I'' <br />dtlL•nu4' ' <br />a'•t •l :Li <br />N'hh''t n' •.I <br />I'r 111'fr'Grl1t <br />u,.; ...,.,.It ,1,.. <br />~tnt .Iv.rl' ~: <br />artha'1'; , <br />it itrl'r h' ~~ <br />iltr Pn•.I tt• n ' <br />f CCr IV`C11 <br />eahr• of :' i• <br />n~lnrial 'h• <br />Iutlul a. ,'-.~ . <br />:dnn ., t•. <br />n;...t;,. .. <br />7'tpr. the n.•. <br />rrPlr ne•, . . <br />nee t:cr d ' <br />Ina:. 4r I>r :. <br />rl,l rl^ ,1 1.•. <br />.. .l,nl: to /: <br />«rrd onfh •. ' <br />nLmr, ~Ir`..,', <br />n'ay, trgl t., i <br />23.: ref r:.: <br />ihr trrnunr•' <br />M ~ 715.11 r ' <br />trialrrtrnl h' <br />city :hd nut <br />lowed b~ h'n.'~ <br />modified W r. <br />izc n•heu ue; , <br />ndeyuately In <br />f'rthrr< inn n <br />