2024-10-31_PERMIT FILE - M2024046

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"Acid Mine Drainage"means contamination of water by low pH or heavy metals that occus from mined or disturbed materials as a result of the chemical and biological oxidation cf reactive sulfide minerals when exposed to air and water.The possibility of generating"Acid Mine Drainage"exists where the pH of any exposed or potentially exposed overburden, waste rock,mill tailings,waste water treatment sludge, or other mined, placed,disposed or stockpiled material has the potential to develop a pH of 5.8 or less. Such detemnination may be based upon acceptable accelerated weathering and leaching tests of a representative sample of the overburden, waste rock, mill tailings,or other mined, placed, disposed,or stockpiled material. In determining whether a potential for acid nine drainage generation exists,the Office wil consider natural pre-mining acidity and metals occurrence in bedrock,soil,groundwater and surface water where such information is available to the Office. Mined and stockpiled material does not include ore or other mined product that is or will be processed within one hundred and eighty(180) days of being stockpiled and removed from the permit area. However, the area affected by such stockpiled material may require the appropriate measures pursuant to Rules 3, 6 and 7,to prevent off-site impacts due to drainage or leaching, and for reclamation of the affected stockpile area. The Existing Mining Operations under Prospecting permit P1992029 and Proposed Mining Operations do not produce any mine drainage nor is there any natural occurring drainage from the mine. The Red Cliff Dolomite member of the Mississippian Leadville Limestone materials being mined will not contaminate any water sources as a result of these materials being disturbed or exposed to air or water. No materials will be stockpiled or left above ground during mining or post mining.