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Exhibit C Mining Plan-Addendum <br /> The information presented in this exhibit is meant to augment the existing Lucky Strike Mill <br /> approved Mining Plan. All existing approved portions of the Lucky Strike Mill mining plan are left as <br /> is, unless specifically revised by the information presented here-in. <br /> The Lucky Strike Mill will process material from any source that produces material which meets the <br /> geochemical standards outlined below. The results of geochemical analyses of all incoming <br /> material will be kept onsite at the Lucky Strike Mill for review by regulators as needed. For the <br /> purpose of this mining plan, ore means any material brought to the Lucky Strike for processing in its <br /> mill and tailings means any output from the Lucky Strike Mill that is not shipped out as product. <br /> All hauling to the Lucky Strike will be made in covered and sealed trucks designed to eliminate <br /> release of solids or ore-affected water. While it is piled at its source and awaiting shipment, material <br /> will have had ample opportunity to drain any free water. <br /> The ore will be placed on the designated ore storage pad immediately south of the mill facility. The <br /> approved Lucky Strike ore storage pad is level and bermed to catch and control any runoff, which <br /> drains to the bentonite lined tailings impoundment(Lined Pond on the approved EPP map). The <br /> tailings impoundment on site have been lined with at least 6-inch thick layer of bentonite.All <br /> stockpiled ore will be removed from the pad and processed within a matter of days, and not stored <br /> for extended periods. This greatly reduces the potential for weathering and leaching of <br /> contaminants from the ore on an unlined pad. Prompt ore processing is essential, since the Lucky <br /> Strike permitted area does not contain sufficient space to allow a large amount to accumulate, nor <br /> to remain unprocessed for an extended period of time. <br /> The maximum amount of ore to be stored at any one time on the Lucky Strike ore storage pad will <br /> be 30 day's production, estimated at 3,000 tons, though often it will be less. This will ensure that ore <br /> supplies to the Lucky Strike mill will not be interrupted by adverse winter storms at the mines and <br /> mill sites. Ores from the different sources will be stored on the pad in separate stockpiles to enable <br /> them to be fed separately into the processing facility to optimize the metallurgical performance. <br /> Their total combined tonnage, however, will not exceed the maximum amount stated above. Each <br /> stockpile will be labelled as to its source. <br /> The ore processing to be employed will still be the same; it will consist of crushing, grinding and <br /> flotation. There will be only flotation circuit-related reagent chemicals used and stored onsite. There <br /> will be no leaching or leach chemicals used or kept onsite. The list of reagent chemicals, both dry <br /> and liquid, to be stored onsite is shown in the approved EPP. <br /> The Lucky Strike contains an approved lined tailings impoundment adjacent to the mill. It is lined <br /> with bentonite. Geologic information contained in the existing EPP demonstrates that there are no <br /> faults or fractures beneath the tailings area. Therefore, there is no opportunity for deep percolation <br /> of contaminated water. The EPP also shows that there are no seeps or springs down-gradient of <br /> the mill or tailings area, so there will be no communication of surface water with groundwater there. <br /> Lucky Strike Mill <br /> August 2024 C-/ Lewicki Si Associates <br />