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+uuai?umiiui <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Namar Resources <br />13I 3 Sh&ntan 51, Room 215 <br />Denver. Cotarado 80203 <br />Phone. 1303) 866.3567 <br />FAX (3031832.0106 <br />Date: 519101 4:26:50 PM <br /> <br />STATE OF COLORADO <br />MEMO TO FILE <br />Specialist: Allen Sorenson Signed: <br />SubjtcVOperatorlOperatiordFiie No. Various Matters. Henderson Milt <br />Climax Molybdenum Company, Permit No. M-1977.342 <br />Type of Interaction: Meeting Ehone Other <br />D I V I S 10 N O <br />MINERAL: <br />?G :OL015') <br />iMIIRE Jj I LNAMAT <br />G.SAF 7 <br />8410 <br />yore <br />Cover dot <br />Greg I W31(ho <br />Execulve Durclor d <br />Morha I B.IOng <br />D,vnur,t D.recrar <br />a <br />Person(s) contacted and affiliation: Erich Bower. Environmental Coordinator Henderson h9 ill. <br />303/569-3221 ext. 22)4 <br />Summary and Resolution of Interaction: Telephone discussion with Erich Bower on the following <br />matters: <br />I . Henderson is compiling a technical revision for submittal to install a ground water interception well fie[( <br />below the tailing impoundment. This type of facility is considered a "permit condition protective of <br />ground water" under Rule 3.1.7, and does not require that points of compliance and nurnaric protectior <br />levels be addressed in the TR application. <br />1 The crusher at the mill site is under demolition. Ore residue, or dead bed, accumulated in the crusher pit <br />is compacted and cemented such that it cannot be excavated without blasting, The Operator needs to know <br />what the standard for dead bed removal will be. The dead bed is a potential source for acid rock drainage, <br />but since the crusher pit will be backfilled and capped, is lined with a concrete foundation, and is located <br />out of drainage ways and above the water table, de minimus amounts of dead bed remaining in the pit will <br />not cause ARD. The standard for removing the material is to apply the best reasonable effort using <br />excavators and possibly some degree of hand mucking, but the pit does nat need to rinsed with high <br />pressure water and vacummed. The Operator wac notified that the Division must inspect the crusher pit <br />prior to back Filling. <br />3. The 3Dam SCiA . -g(4,t' project is being completed. The old 3-(Jam pump station has remained opt:r:ttional <br />as a backup system over tale past winter. The Division, through the phone conversation and by this memo, <br />provided the go-ahead to remove the 3-Darn pump station concurrently with finalization of the seepwater <br />project. <br />cc: Erich Bower, vi(t facsimile <br />Carl Mount, DMG <br />0wIndow4LVffwnalthcrietrjn mtt ?anout if.k