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EXHIBIT C MINING PLAN <br /> The Detroit City Mine is a mineral specimen mine, and therefore does not operate in a manner <br /> typical of most metal mines. The "ore"pursued in this operation is high quality mineral specimens <br /> located within the unique geology of Mt. Bross. Mining will affect the surrounding area by periodic <br /> generation of inert waste rock from the development of drifts and stopes underground. Unlike most <br /> metal mines, there is no large amount of vein ore to be excavated and processed in pursuit of the <br /> target commodity. Material excavated form the workings will be inspected and all mineral <br /> specimens will be removed. The remaining waste rock will be placed in a waste rock landform <br /> (WRL)which will be eventually topsoiled and reclaimed or shipped to an offsite location. Inert <br /> waste rock will be sold and shipped off site to existing approved landfills and utilized for its high <br /> calcium carbonate composition. Potentially acid generating material will be shipped and disposed <br /> of offsite as needed at one of the following facilities: Waste Connections' Pueblo facility or Clean <br /> Harbors-Deer Trail. These facilities are permitted with the Colorado Department of Public Health <br /> and Environment. Any material sent to any of these facilities will provide the appropriate chain of <br /> custody documentation to satisfy DRMS requirements. <br /> The primary reason of the conversion of this reclamation permit from a 110 1 to a 110 2 for this <br /> operation will be the fill and widening of the access road to allow for more parking. This additional <br /> parking added 0.4 acres to the permit area, increasing the total permit area to greater than 4.99 acres <br /> and thus necessitating the conversion of this permit from a I I0(l) reclamation with a maximum <br /> size of 4.99 acres to a 110(2) reclamation permit with a maximum size of 10 acres. <br /> 1. Mine Life <br /> The mine will operate for an additional 5 years with the conversion from a I I0(1)to a 110(2) <br /> reclamation permit. This mine life is based on estimates of the mineral specimens that are believed <br /> to be found underground. It could be shorter, or longer, depending on market conditions and what <br /> quality and quantity of specimens are found. No expansion of the WRL will be required due to this <br /> extension in life of mine as a large quantity of the waste rock that would be destined for the WRL <br /> has been, and will continue to be, shipped off site for sale to landfills due to the high concentration <br /> of calcium carbonate in the waste rock or off site for disposal if it is potentially acid producing. <br /> Detroit City Mine (:n•g I cwi,k.and YI I l <br /> October 2019 C-1 <br />