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,_ <br />.\ <br /> <br />DIVISION OF MINERALS AND GEOLOGY <br />Dcpanmenl of Natural Rewurce~ <br />1.f 13 Shaman SL, Room 21 5 <br />Denver, Colnmrla 80203 <br />Phone. illl3l 8hh 3ihi <br />FAX: 13f11) K 12-HI Oh <br />c-re-rt, OF COLORADO <br />~I~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />VIA FACSIMILE, HARD COPY TO FOLLOW <br />September 30, 1997 <br />Mr. John Miner <br />Denver East Machinery Company <br />15507 East 18th Ave. <br />Aurora, CO 80011 <br />RE: Adequacy Review, Gold Hill Mill, File No. M-94-117 <br />Technical Revision TR-002, Hazel A Bulkhead Repair <br />Dear Mr. Miner: <br />Roy Rnmrr <br />Gnvemor <br />lames 5 LMhhearl <br />Fecmive Director <br />M¢harl B. Long <br />Division Duecinr <br />The Division received your response to our adequacy review for <br />Technical Revision Tr-002 on September 26, 1997. After reviewing <br />your letter, we have some additional concerns which are listed <br />below. <br />1. Your response is adequate. <br />2. The Division recommends that you clean the adit wall to <br />improve the surface for bonding before pouring the cement. <br />Our suggestion is to scale off any loose wall material, sand <br />blast the wall, pressure spray the affected area and remove <br />the material with a vacuum. <br />In addition, we recommend that while pouring the cement wall, <br />you tremie the cement around the extended discharge pipe to <br />eliminate gaps and pockets. Please respond. <br />3. The Division has evaluated the cost to remove the cinder block <br />and concrete wall during reclamation. Our figure is based on <br />the cost to hire a contractor to complete the work and <br />utilizes cost data included in Means Site work and Landscape <br />Cost Data. <br />1. Demolish the block and concrete walls $ 850.00 <br />(see enclosure) <br />Congested Site Factor - add 200% $2,550.00 <br />2. Concrete and debris disposal 2.5 yds. <br />