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_ _ _ STATE OF COLORADO <br />DIVISION OF ,MINERALS AND GEOLOGY ~. <br />Dr{Iartrruall of V.Anr,d Rr`•OW(In <br />I l t 1 ifym+an St.. Room :, i C l) I t) I. A 17 0 <br />ul~ t ~ i~,n ,+~ <br />Drnvrr. Colorado BOI03 M I N f R A l <br />rnnne: t lo), aur.3se~ <br />rAx:,lo,ta3iastot, G E O L O G Y <br />.,..•..T,o•..r„1~~ <br />+erlT~•/C If NCI <br />p,gTE: January 16, 2q()4 <br />oat o~a.++ <br />TO; Erica Crosby cwrrro` <br />crltt wstcfinr <br />r1lY M~N• DIIrAa <br />PROM: Allen Sorenson <br />Rr•tiia w cal+nr <br />lM nKn Ulrntw <br />K/:; S(ubiliq'ujlrrill((1101I/)!rf)I/'Stlll[!Or)!l'rStrucrlrrrs, •,vmaeruwrnLugm. <br />Lujur~le' f1'ea'!. Inc•.• Duc•krvorlh !'ir, /••ife .'\'r!• :11-?0/)-i-091 <br />hhc DuckYVOrth Pit pcnnit application describes minimum nnning setbacks from pcrn,:u)cnt n,antnadc <br />structures in three rlilTcrcnt ways within the holy of the application exhibits: these descriptions appear <br />to 6c in conflict and must be resolved prior to pcnnit application approval. F..xhibit S to the :q)plication <br />commits the Operator to setbacks equal to 3-times the depth of the gravel pit• and includes an additional <br />5(1-trot buffer of un-mined land on either side of watenvays• Idaho Creek and the Smith and lannwns <br />Ditch in particular. the following cross sections illustrate the pern)it conditions described in Exhibit S <br />for the mining setbacks. <br />(icncdc $In1elUlC. <br />('ould be a fence. <br />~ll_~jy~Tf.Ssil_ia~~ :_.Ijll]Ltl+jllj11211 vncd. road. c1c. <br />\1ittcd <br />1•an <br />Pit I)cpth <br />ta) Scthack to Structlues it Operator Mines to o Vcnical ar near Vertical Pit Noll. <br />i <br />lIn-13xc:n'atcd \ause Vatcnal <br />(not backtilp ~/ <br />ILtI Opcramr may Mine to a Vertical Pit \1'all as Illusualed in ('mss-Secuun lal• but must Mine at ?: I once <br />Inside the %one where the I lori[mual Distance to the Struenue is Ics Than ? 1'intes the t';t Depth. <br />Depending nn the nature of the Structure anJ the Excavating Methods L•ntploy~til, a Small Un-Mined <br />Ilullir at the top of the ?:I Slupc nay be ltcyuircd. <br />OPoir d Cnlundo <br />UiLcr M ncltw•.Ind tnACLV! Mmty C,mloRlrel Survr• <br />M,ned Land Rn 4rltanon <br />