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London Mine Portals <br /> Page 3 <br /> Analysis <br /> Diversion and isolation of the mine dumps(including pH stabilization)will isolate this material <br /> from direct contact with run on and portal flows and minimize infiltration from stormwater events. <br /> These Best Management Practices may improve Burrows Creek as well as the headwaters of the <br /> Animas River. <br /> The hydraulic seals proposed for the London Mine will reduce the unsaturated zone by <br /> removing the drain. This will result in minimizing the oxygen available for reaction with the sulfide <br /> materials in the area. The hydrological conditions will be restored to an approximation of premining <br /> conditions. <br /> Monitoring <br /> Monitoring points for this project will consist of upstream and downstream as well as flows <br /> from adits and dumps. Stream sampling for this project will occurr in Burrows Creek a tributary to <br /> the North Fork of the Animas River. Monitoring will start prior to remediation work and continue <br /> until two years after the project is completed. Monitoring will occur four times yearly, once in early <br /> summer and fall and will be submitted by the 28th of the following month as well as annually at the <br /> same time as SGC's Mined Land Reclamation submittal. A copy will also be sent to the Water <br /> Quality Control Division. All samples taken will be analyzed for dissolved metals for Zn, Fe, Al, Mn, <br /> Cd, and Cu, total sulfate, hardness and a field pH will be taken as well as field measurements for <br /> flow. <br /> Reporting <br /> Should this project become necessary to maintain water quality in the Upper Animas, SGC <br /> will notify WQCD prior to work starting. Prior to installation of hydraulic seals, SGC will submit seal <br /> designs to WQCD. SGC will submit annual reports for this project starting with finalized engineering <br /> drawings prior to starting onsite work. Once all reclamation activities are complete, a final report will <br /> be submitted. Reports will be sent to the Division of Minerals and Geology as well as the Water <br /> Quality Control Division. The report will include activities to date as well as planned activities for <br /> future years work. <br /> Budget <br /> SGC will fund this project. <br /> Remedial Goals and Objectives <br /> Reduction of low pH, metal laden waters flowing into Burrows Creek by: <br /> 1) Reduction of acidity in the headwaters by isolating or limiting abilities of waters to react <br /> with pyrite and other sulfide minerals. <br /> 2) Reduction of exposure to waste material by snowmelt, rainwater. <br /> 3) Visually reclaim area to accepted standards. <br />