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Gold Prince Mill Tailings and Waste Dump <br /> Page 2 <br /> Desc iption of ProjM <br /> The surface tailings and waste rock will be removed and consolidated and the pH adjusted to <br /> near neutral by addition of lime or limestone. A suitable relocation area for tailings and waste rock <br /> will be built onsite. The onsite relocation area will have a diversion trench established around it to <br /> isolate the material. All surface soils will be salvaged and used for final capping. Final cap thickness <br /> will depend on the amount of soil available for salvage, 14-16" minimum is preferable. Construction <br /> of the relocation site will conform as near as possible to the site topography with maximum slope <br /> ratios of 2:1. The relocation area will be located as far away from streams as practical. Once all <br /> material is consolidated,the area will be capped with the salvaged soils, amendments added, seeded <br /> and mulched. All surface disturbances will be reseeded. It is possible that a 404 permit from the <br /> Army Corps of Engineers may need to be obtained before performing this work. This plan is also <br /> subject to notification requirements, for disturbance of Historical Mining Sites, to the board of the <br /> San Juan County Commissioners. <br /> At the portal, the closure bulkhead will be reinforced with concrete and grouted to prevent <br /> water from flowing out the portal. The tunnel would then no longer be a drain for the near surface <br /> fractures in the area. Surface disturbances will be treated with soil amendments and reseeded. <br /> The property has some building foundations on it and may be deemed as historic. SGC will <br /> preserve these structures provided that the mine waste can be economically removed witho damage or demolition of structures. ut major <br /> Work-u <br /> 1)Locate acceptable area away from stream with enough soil available for cap. <br /> 2) Strip and stockpile soils. <br /> 3)Build upland diversion ditches to prevent run on conditions. <br /> 4) Build catchment ponds as needed to contain material during excavation. <br /> 5)Pick up and relocate waste and tailings to disposal area. <br /> 6)Reclaim catchment ponds. <br /> 7)Cap relocation area with salvaged soil. <br /> 8)Apply soil amendments seed and mulch all areas disturbed during project. <br /> AawySis <br /> Consolidation,improvement of pH conditions and isolation from snowmelt and rainwater is <br /> a Best Management price which will prevent waters from coming into contact with the tailings and <br /> mine waste rock. Preventing water from exiting the mine portal will decrease the area drained by the <br /> adit and let the near surface water return to its natural flow paths. This project may help in reducing <br /> dissolved zinc as well as other dissolved metals in the Upper Animas Basin. <br />