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999 <br /> Remediation Plan: Sunnyside Mine Pool Mitigation <br /> Remediating Party: Sunnyside Gold Corporation <br /> P.O. Box 177 <br /> Silverton, CO 81433 <br /> contact William B. Goodhard <br /> Resident Manager <br /> Identification of Lands <br /> Underground workings of Sunnyside Mine located in San Juan County, Colorado. Workings <br /> he under Sunnyside Basin with access tunnels from Eureka Creek, Terry Tunnel and the old townsite <br /> of Gladstone in Cement Creek, American Tunnel. See attached map. <br /> Identification of the Waters of the United States Potentially Affected <br /> Headwaters of Eureka Creek and Cement Creek. Both flow into the Animas River at or <br /> upstream of Silverton, Colorado. See attached map. <br /> Physical Description of Conditions <br /> Sunnyside Gold Corporation(SGC) is in the process of final reclamation at Sunnyside. As <br /> part of the final reclamation, SGC has proposed and the Colorado Mined Land Reclamation Board <br /> (NLRB)has approved,the installation of hydraulic seals in order to return the hydrologic regime to <br /> an approximation of premining conditions. The seals are to be used to minimize flow through old <br /> workings while forcing a majority of the water around the mine workings. As the mine pool fills with <br /> oxygenated water, the mountain will be resaturated and historic flow paths will resume. After the <br /> oxygenated water reacts with sulfide mineralization, the mine pool will be devoid of oxygen and the <br /> pool will equilibrate at a near neutral pH. <br /> Description of Project <br /> The purpose of this project will address the following: <br /> 1) Force the mine pool to physical equilibrium at an accelerated rate. <br /> 2) Force the mine pool towards chemical equilibrium from a basic pH and avoid acid <br /> conditions. <br /> 3) Speed up the chemical equilibrium process by minimizing <br /> the initial oxygen dependent reaction with metal sulfides. <br /> 4) Provide alkaline solution to counteract the initial <br /> lowering of pH in the pool as oxygen is consumed. <br />