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MEMORY TRANSMISSION REPORT <br />PACE :001 <br />Tlhff :APR-17-02 16:06 <br />TEL NUl,18ER1: +13038663567 <br />NAA¢ :Colorado Division of Minerals & Geology <br />FILE NUlN3ER 692 <br />DATE APR-17 1fi:05 <br />TD $3035692630 <br />DOCUI~NT PAGES 002 <br />START TIIA< APR-17 16:05 <br />END TIM1E APR-17 16:06 <br />SENT PAGES 002 <br />STATUS OK <br />FILENUI~ER :692 *** SUCCESSFUL TX NOTICE x** <br />STATE OF COLORADO <br />DIVISION OF MINERALS ANO GEOLOGY <br />oapaam6n[ of Naaral Ryeu,ca~ __ __ _ __ ~ __ .. <br />1313 SM1C,TUn St. Room Sly <br />Oanva.. Cela(ade Be209 O [ ~ 19 [ O N O <br />PFOn~: f3p3] 866-356> ' <br />iAx: (903)892-8106, <br />April 16, 2002 <br />Mr. Tony LuCero <br />Climax Molybdenum Company <br />P.O. Box 68 <br />Empire, CO 60436 <br />PoaFIY Fax Nota >BT °~(° - fT- o«~ <br />odoep[. ~ c inQ v.m i.G <br />ne PM1ena I <br />a: a „ p j> O <br />RL''.- W¢tsr Tr<atm<nt SZttdg< Dispos¢Z iR Possd 7.2, S<nd<rrox Miaa~ <br />P<r~cit No_ M-Z977 342 Tsslsnis¢Z Rev/siox No. TR-a0A <br />Dear Mr. Lucero: <br />ce.:mer <br />e.aa e. w.mn~. <br />c..~~..u..a o <br />MICFO~I 8, loop <br />or_rae.. or...<.e. <br />Thas,y you Yor your lesser dated April 9, 2002 proposing aped£ac proccdurca for diapoad of dewatesed <br />high-density sludge gaaerated az cha Urad wastewater acatmnas pleat into Poad 1.2 at the Henderson <br />Mine. The Division of Minerals and Geology CDMG) approved the disposal of Urad sludgy into Pond <br />1.2 through the conditional approval of tachtrical revision TR-008 on Sapcember ']. 1999. Tha <br />condition ro approval of TR-008 was chat: <br />The Henderson Mine will develop a saaxegy to protect the geosyaxYteric liaor is Pond 1.2 <br />during placement of sludge. No sludge will be glaced in thm pond until liner protection <br />measures havs bcea reviawcd nod accepxed by rw~ Dlvisioa of Minerals and Gcology- <br />Subsequanc co the coad;doaal approval of TR-008, DMG approved Headerson's proposal For sludge <br />disposal from a conveyor bmlt, but required Certain descriptions and contadcxsscncs by Hcadcsaon so <br />assure that no rocks with the potmnrisi xo damage the geosyathedc l;aer would be dropped from the <br />conveyor belt into Pond 1.2. 'rhm DMG ;s satls5ed that adhcreacc to procedures described in your <br />letter dated April 9. 2002 co provcnc the iaaoduction of potentially damaging rocks into Pond 1.2 will <br />provide adcqu arm protectton Por the liner_ The DMG iR Further sacis8ed cleat disposal of sludge law slat <br />pond using a iron[ end loader wpere navel over else ,,,-.ea surface by the loaaar is prcvancad, as <br />described in your April 9, 2002 letter, will not rosvh in datnagc to the liner. In coasidcracioa of she <br />foregoing discussion, the DMG hereby approves Headerson's plan xo dispose of Urad sludge into Pond <br />1.2 using mieher a conveyor belt system or a front-end loader whcm contsex of the loading equipment <br />witty rite geosynthedc liner;s preveaxed- DMG fuaxtaer approves Hendcrson's plan co wash sludge into <br />doe bosom of the pond using wazar hoses. However. it is xhe DMG's direct expezieace that a focussed <br />stream of water under high pressure can damage geosyaffietic liners: Henderson is advised to carefully <br />observe liner wt~ghing operations and control water pressure to assure xhax xbc Ilnar;s not dnxtraged <br />wlchia rite body of chm geosynrltetic panda ar az the scams. <br />The Henderson Mine leper dared April 9, 2002 describers [he use of earthmoviag and compaction <br />equipment on the liner as well as placement of gravel ~d cotapacted {[ll on the liner. The DMG has <br />ideatitiad the following issues to be £ slued prior to approval of the placctneac of liner cover £dl. <br />M 1 N~ R g L 5 <br />G E O L O G Y <br />°rS)Y~c 6TY <br />