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. II I I II I II I II IIII III <br /> 999 <br /> pAm iation Work Plan: London Mine Portals <br /> Remediatinia Party_: Sunnyside Gold Corporation —� M G <br /> P.O. Box 177 <br /> Silverton, CO 81433 <br /> contact William B. Goodhard <br /> Resident Manager <br /> Identification of Lands <br /> The London Mine is located in Burrows Gulch to the north of Houghton Mountain, San Juan <br /> County Colorado. See attached location and site maps. <br /> Identification of the Waters of the United States Potentially Affected <br /> Burrows Creek is above the confluence with the North Fork of the Animas River. See <br /> attached location map. <br /> Physical Description of Conditions <br /> There are up to five portals in the area,three which appear to discharge continuously and two <br /> discharge during high runoff, two waste dumps and a shaft. Water flowing from these areas is low <br /> in pH and appears to carry dissolved metals. The dumps are exposed to stormwater events as well. <br /> The regional geology is volcanic rocks with narrow veins containing base metals; Fe, Pb, Cu and Zn. <br /> Sampling of the waters in this area indicate that even though the portal discharges are small, there is <br /> a substantial increase in dissolved metal loading to Burrows Creek. <br /> Description of Project <br /> The waste dumps need to be isolated from portal flows as well as stormwater events. The <br /> dumps will be regraded and hydrologic diversions installed to prevent run on conditions. The dumps <br /> would then be stabilized with basic pH material and revegetated to minimize percolation from <br /> stormwater events. <br /> The portals will be opened and studied for the placement of hydraulic seals. In order for <br /> hydraulic seals to be placed, SGC feels that sites meeting the following conditions needs to be found. <br /> 1) Location far enough underground to avoid the near surface fractures and joints caused <br /> by weathering. <br />