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Letter to Sunnyside Gold 3 October 27, 1993 <br /> portal closure details prior to construction. TR-14 was <br /> submitted to fulfill that requirement. <br /> 2. Indefinite or perpetual mine drainage treatment is not <br /> desirable for final reclamation. Bonding for perpetual water <br /> treatment requires potentially inaccurate actuarial forecasts <br /> and imposes a large financial burden on mine operators. <br /> Sludge generated by most conventional water treatment <br /> technologies does not allow reclamation of areas used for <br /> sludge disposal. Perpetual water treatment does not afford <br /> mine operators the possibility of eventual mine closure, bond <br /> release, and permit termination. <br /> 3. The physical setting of the Sunnyside Mine appears to make it <br /> ideal for a hydraulic sealing scheme. In addition, the plan <br /> has contingencies built into it that will allow a return to <br /> the status quo if any unforseen problems develop (such as <br /> short circuiting of contaminated mine pool water to the <br /> surface) . <br /> 4. The Division and the mine operator agree that hydraulic seals <br /> offer the best opportunity, given existing technology, for <br /> final mine site reclamation and eventual bond release at this <br /> mine site. <br /> If you have any questions, please contact me. <br /> Sincerely, <br /> Z <br /> Allen C. Sorenson <br /> Reclamation Specialist <br /> enclosure(s) <br /> cc: Pat Nelson, WQCD (w/ enclosures) <br /> ref. CPDS Permits: CO-0027529 and CO-0036056 <br />