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Exhibit D Mining Plan <br /> The London Mine Clean Up will excavate prelaw waste piles throughout Mosquito Gulch and reclaim <br /> these areas, removing sources of metals and sediment from Mosquito Gulch for the first time in <br /> decades. The number of piles and possible targets for cleanup operations present in the area prevents <br /> the identification of rigid disturbed area limits as usually occurs with the mining of typical surface ore <br /> deposits. Therefore, the mining plans outlined in this exhibit will be applied based on common site <br /> conditions found within the affected area. The conditions in the affected area are broken into four <br /> mining environments: Vegetated Loose Ground, Non-Vegetated Loose Ground, Vegetated Competent <br /> Ground, and Non-Vegetated Competent Ground. When a waste pile is identified for cleanup, its mining <br /> and reclamation plan will be based on which condition it is found in. This standardizes mining and <br /> reclamation procedures for ease of operations and CDRMS enforcement. <br /> Given the variability of size and location of piles, the reclamation financial warranty (bond)will be based <br /> on a total disturbance area and maximum material to be moved for each year. The operation will disturb <br /> no more than 20 acres at any given time: the cumulative size of all piles disturbed yet unseeded must <br /> add up to less than this limit at any time. Similarly, the operation will have no more than 10,000 CY of <br /> waste pile material requiring removal or regrading: the cumulative quantity of prelaw waste material <br /> requiring handling for reclamation must add up to less than this limit at any time. This approach allows <br /> the operator flexibility to target waste piles as they are advantageous to excavate while maintaining <br /> clear enforceable permit limits covered by the bond that are enforceable by CDRMS. The approach <br /> facilitates the cleanup of a broad area of Park County of prelaw mine waste without constant <br /> administrative hurdles and minimum paperwork. <br /> The mining plan described in this exhibit is shown on the Exhibit C maps. <br /> 1 . Description of the Material to be Mined and Underlying Geology <br /> The affected area is located in Park County, situated in the heart of the Colorado Mineral Belt. The <br /> region lies within the Southern Rocky Mountains physiographic province, specifically <br /> encompassing portions of the Sawatch Range and the upper Arkansas Valley. The target material <br /> being mined is waste rock from prelaw mining in the region found in piles of various sizes. All <br /> material mined as part of this operation has already been excavated and piled on natural ground. <br /> No mining of native material will take place. <br /> The bedrock geology of the area represents a complex sequence spanning millions of years. At its <br /> foundation, Precambrian metamorphic and igneous rocks form the core of the mountains. These <br /> are overlain by Paleozoic sedimentary sequences, dating from the Cambrian through <br /> Pennsylvanian periods. The region also features significant Tertiary intrusive bodies, including <br /> porphyry stocks and dikes that were emplaced during periods of intense igneous activity. <br /> The area is historically significant for its mineral deposits, making it one of North America's richest <br /> mining districts. The geological processes created extensive lead-zinc-silver replacement deposits <br /> London Mountain Clean Up <br /> April 2025 Lewicki&Associates <br />