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ID: JUN 27'95 15:11 No ,005 P.02 <br />kGV BY:PMNS a U-' ~-HO i 0.1'IppJ r pAIILL A~14 VV~L~ u~atuavure.. <br />1(~~t~-~.-~_ <br />DIVISION Of WNIiAIS ANU I;EOIOCY <br />0lDlnmpm pf Nuurll 8n.,wcer <br />i ] ~ i Snrrman 5~.. Roum;, S <br />I~IC ()0I1032~1p0 <br />October ~, 1997 <br />Ks. hlana &aott <br />battle xountain ijyaouraas, Inc. <br />P.O. SOX 310 <br />^an Luic, CO 81152-0710 <br />.ti . <br />,) .. <br />Y <br />. .tq Rpnw -•~- <br />(.a.enr+ <br />M.r~u1P, li..~e <br />D.r,.. uo-.rm, <br />Ito: rhasC IZ, Ra16! I Embanxsaant Litt, 6an'Luin vro~set, Files Nn. <br />x-ee-112 <br />Aenr xc. Saott: <br />Tha Dlviaion hac reviewed the ihlOraation submitted with your <br />sinptember an, 1993 lector. roquasting approval to continua <br />aonstruotion of the ambankae~t. )lased en what you have submitted, <br />the Division can grant suds apps;'oval, horawr, inforaation gathered <br />during the Divlaionls irispaeeiien on October 1, 1993 indiiaaterl that <br />the first 10 tree o! the raise vas constrcotod with mal:eriale that <br />do not beet the apeeiiioations Sn tha~approved design. Zt is my <br />understanding lrom dieousaions with Division management that the <br />use of non-specification ^atarial in both conctructlon oi' tho <br />embanla+,ant raise, and the drainage blanket, will bs prgeonCad to <br />the xined Land Reclamation 19oard a osaiblo violation to Permit <br />Ito. H=~@~,1Z.. IC is possible that the Bear w deform ne ^ <br />the use o! the non-speGilioation material is unncooptabl~e~ if eHxl <br />chooses to eontihue eanstiuotion of tho raise, be advised that rho <br />materials being usod are not aurrontly approve3, ^nd may <br />cono~ivabiy haves to be amended or raaovad, <br />It Iitutz ehoosoe to aontinw eenatruotion, the piaeoeet:ors should <br />Continue to be monitored Gn a regular basis during and •after <br />construction, and the Division notified if. any water c doteetsd. <br />The settlement uonitorinq stations should be a~srvpyea daily during <br />construction a! Raiw I, and daily 6urvays should oonLdnun after <br />construction until there is no movoannt (1lithln instrument <br />limitations) !or thtve uoriaaoutive days. Tha stations should ba <br />monitored weakly thereafter until Isero moveaent hac been indicated <br />!or four consecutive weeks. <br />The ooncern that the Division has with the conetruct.ian of Raica 1 <br />is wit11 the hydxsulio eoslQnatlvity of the non-cpecilloetSon borrow <br />material being used to oonsts'uot the raise. The design approved by <br />the Division calla for the use o! natorial with less than l0 <br />portent fines. This typo o! sat`rial vta incorparat.ed rota the <br />design to promotes deeioeation o1 bAach tailing which will torn the <br />foundation o! Phase 11, Raise II. The aaterial from th• borrow pit <br />~.. <,, <br />STATE OF COI..ORADO <br /> <br />