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ROBINSON <br />BRICK ~ <br />COMPANY ~ <br />~~~ <br />~~ <br />~I<treh IG. ,uo• <br />RECEfV>=„; <br />I)ivisinn of ~timrals and Cieulug}• <br />I ,13 Sherman titreet BAR ? 3 ~ <br />I)ettver.CU ;u i'u~ //~~ <br />1 I ~ ~ ~ g L~~ .. •~. and 60t1I6DY <br />;11lctnilnt \lr lirrh:ln I:cffclctt <br />Suhjrct: Ap:n•he Aline Reclm»atiun Cost lstintate <br />1>rar ~4r. hrllrlet(. <br />Ituhinsnn 13rirk Cuntpam has rcccivc~(1 }our Alinerals Program Inspection Report dalyd <br />Fehruan ~~ '[1115 ,!r!d tnur attached revise) rcclamatiun cost estimate. In rrcietc of the <br />recl:unatiun cost estimate rte have the li~llutving comments. <br />1•:u6~ IIII1 <br />1'uur I;ISk +~ Hill ttorksheet estimates costs to grade mine high galls to i;l slopes, using <br />:1 BUIWozer. (lUC CSperleltel' at Ihls spl'CIIII' nllne. 8S UIII as ;a our other mines. indicates <br />that cutting. hi h tudl> with a hulldozcr i. nut rite preferred rccl:unatiun ntethud. Ikte to <br />the inhcrrnt h:udnrss of the clad formations and minimal overburden atx,vc thr clay <br />fbrntatiuns. ,;riding high trolls with a hulldozcr will rcyuire a rcL•aiaely large lime <br />espendiuur. It is estinuued that u length of greater th:m Sllt) trot of hightvall would first <br />nyuire ripping with a bulldozer, accomplished b}• hacking the hulldozcr up to the tut, <br />edge of the highwull and pulling atvac from the highwall with the hulldozcr ripper <br />.atachntcnt engaged. Suhscyuenth•, the bulldozer [could have n, turn around and push the <br />yipped material down the high wall edge. 'I his procedure might nee(I to be retreated <br />nmtteCPll~ tlnll'ti ({, :tChte\': [tit' reyll!CCd :lpproS!nl:l!l' slope an~'1C. t~nCe !rte rlt`t`C:i <br />material is rr-worked along thr highwall, the hulldozcr would have to he tracked across <br />the muphh sloped surGtcc to break up large clay pieces and shape the slope prior 10 <br />topsoil application. <br />\Yc reconttnend That puddle wheel scrapers (Caterpillar Model 6_' +) he u+u;d to move and <br />place sa,ckpiled overburden material along pit slopes to achieve 3:1 slopes. Specitirdl~. <br />the scrapers ttuuld move acailahle m:aerial t~um the current cl:q product stockpile pad <br />;[yeas (pads ron.uurtc(I of overburden m:ucriali :md the mine uccrhurden stockpiles a, <br />the highttull. I'hr. material tu,uld be placed in lifts starling at the base oC the hightcall. It <br />should hr nulyd. placentcttt in lids by scrapers trill result in hotter compaction than <br />plucunent by a hulldozcr. resulting in a slope less prone to settling and erosion. A motor <br />grader and hulldozcr tlnuld he used to shape and contour the lifts. In addition. a <br />bulldozer wnthl also he usc(1 to rip the compacted pad materiah as nccessan•. <br />