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999 <br /> 5TATE OF COLORADO <br /> DIVISION OF MINERALS AND GEOLOGY <br /> Department of Natural Resources POW,7 T, <br /> 1313 Sherman St., Room 215 <br /> Denver,Colorado 80203 EN <br /> Phone (303)866-3567 �a DV ER r --i °E <br /> FAX-(303)832-8106 ✓ 'N ® ^; { „, ,p "Y <br /> :ter 1`. DEPARTMENT OF <br /> :�, -77. 378 NATURAL <br /> V4arch 19, 1999 RESOURCES <br /> c <br /> tii;✓I:f1ti C i4;x(yeCllo4y1 5l � Roy Romer <br /> Larry Perino Governor <br /> j Sunnyside Gold Corporation James S.Lochhead <br /> P.O. BOX 177 Executive Director <br /> Silverton, CO 81433 Michael B.Long <br /> ` Division Director <br /> RE: Mineral Creek Hydrologic Control Project ! Carbon Lakes Waste, <br /> Sunnyside Mine, Permit No. M 77-378. <br /> Dear Mr. Perino: <br /> DMG has received your 3/4/99 letter to Paul Krabacher, Inactive Mines Program, regarding <br /> importation of approximately 1 ,900 cy of mine waste to be utilized as structural fill material for <br /> the Mayflower Pond 4 facility. <br /> Sunnyside Mine permit documents indicate that the referenced extraction area has been a <br /> substantial contributor of dissolved Fe, Al and Zn to Mineral Creek. Additionally, the potential <br /> fill materials may be similar in acid base potential and metal content with the tailings impounded <br /> in Mayflower Pond 4. Removal of historic mine waste materials from potential contact with <br /> water and consolidation with tailings at the Mayflower Pond 4 appears to be a Best <br /> Management Technique. <br /> Rule 3.1 .5(9) appears to provide opportunity for such activities, providing the operator submit <br /> the notice required by Rule 3.1 .5(9), including a signed affidavit certifying that the material is <br /> clean and inert. Rule 1 .1 (24), defines inert materials as not including acid or toxic producing <br /> materials. Acid and toxic producing materials and acid mine drainage are defined by Rules <br /> 1 .1 (1 ) and 1 .1 (2). <br /> The potential fill materials may contain acid or toxic producing 'materials. However, the <br /> potentially acidic materials could be neutralized by blending with high pH materials, thereby <br /> rendering them inert. Pursuant to Rule 3.1 .5(9)(c), DMG will require that the operator certify <br /> that the pH of the fill material has been adjusted to near neutral (pH 6.5), by addition of lime, <br /> limestone or other acceptable product. <br /> Please contact me at the DMG Durango Office, 484 Turner Drive, Building F, Suite 101 , <br /> Durango, CO 81301 , phone (970) 247-5469, if you have any questions. <br /> Sincerely,�a��f''• ��--' <br /> Wallace H. Erickson <br /> Environmental Protection Specialist <br /> cc: Bruce Humphries <br /> Paul Krabacher <br />