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4 <br /> Gold Prince Mill Tailings and Waste Dump <br /> Page 2 <br /> Description of Project <br /> The surface tailings will be removed and consolidated and the pH adjusted to near neutral by <br /> addition of lime or limestone. A suitable disposal area will be built onsite or if not practical, the <br /> tailings would be hauled to the #4 tailings pond at the Mayflower Mill. The waste dump will be <br /> consolidated onsite away from streams, capped and planted. All surface disturbances will be <br /> reseeded. It is possible that a 404 permit from the Army Corps of Engineers may need to be obtained <br /> before performing this work. <br /> At the portal, the closure bulkhead will be reinforced with concrete and grouted to prevent water <br /> from flowing out the portal. The tunnel would then no longer be a drain for the near surface fractures <br /> in the area. Surface disturbances will be treated with soil amendments and reseeded. <br /> Analysis <br /> Consolidation, improvement of pH conditions and isolation from snowmelt and rainwater is <br /> a Best Management Practice 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 in the Upper Animas Basin while cleaning up historic mine wastes. <br /> Monitoring <br /> Monitoring sites will be established above and below the site for dissolved and metals and <br /> continue for two years after completion of consolidation. Four sample sets will be taken yearly with <br /> one as soon as site is open in the spring and once during low flow in late fall. Samples will be taken <br /> in the creek above and below the site. All samples taken will be analyzed for dissolved and total <br /> recoverable metals for Pb, Cu, Zn, Cd, Mn and Fe. A field pH will be taken as well as field <br /> measurements for flow. <br /> Reporting <br /> Due to the short duration of this project a report will be submitted after consolidation is <br /> completed. Results of the monitoring will be submitted with the annual submission of the annual seep <br /> and spring study and sent to both the Water Quality Control Division and the Division of Minerals <br /> and Geology. <br /> Bud et <br /> SGC will fund this program. <br />