2014-08-01_PERMIT FILE - M2014043 (4)

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MINING PLAN EXHIBIT D(CONT) the wall will prevent any damage to said wall . By leaving 152 feet instead of 15 feet the safety factor is increased by nearly 10 times . The discussion contained in the GEOTECHNICAL STABILITY EXHIBIT explains why mining will have no impact on the slurry wall . The setback lines on the map are the indication of the mining limits, i . e . , the top of the slope into the mining area. When the setbacks will no longer be disturbed they will be reclaimed as prescribed in the reclamation plan. During mining all interior pit slopes will be maintained with a pit-ward attitude so that there will be no drainage off the affected land. This same slope management plan will prevent any offsite slides or other disruptions, and will also address some of the storm-water runoff questions arising from the Clean Water Act . Isolation berms or ditches will be constructed within the setbacks around the mine to prevent stormwater from entering or leaving the site . No water will be discharged from the pit unless done so under a CPDS permit and all stormwater will be collected on the site and treated before being released if it comes in contact with disturbed areas as required. We have adequate water available to meet the requirements for evaporative loss during initial mine startup, see EXHIBITG . An application will be made for a well permit to address the need for evaporative losses associated with mining in the ground water table . This will only be needed until reclamation is complete as the entire area will be backfilled so no new lake area will be left . MINING TIMETABLE The continuing uncertainty of economic conditions in the con- struction materials industry precludes an accurate forecast of demand during the life of the mine . This estimated mining timetable is based on an average year and it is expected that a specific year will vary widely from the average . 10