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<br />L~ <br /> <br /> <br />1 <br />t <br /> <br /> <br />1 <br /> <br />1 <br />LI <br /> <br /> <br />1 <br /> <br /> <br /> <br />CHAPTER 3 -MINING PLAN <br />The mining plan as discussed in this report is based on the Amended Comprehensive Mining and <br />Reclamation Plan for the Lyons-Rockin' WP Pit, Permit M-74-015, prepazed by Hart Environmental <br />in June, 1999. The Comprehensive Mining Plan and Reclamation Plan provides a description of the <br />mining and reclamation plans for the proposed amended mining permit, including maps of the areas <br />planned for mining, maps of planned lined and unlined lakes and genera! descriptions of the mining <br />operations. Figure 1 presents the general location of the planned mine areas. <br />The amendment will allow for the mining of about 478 surface acres. The planned mining area is <br />primarily located south of the South Branch, with the exception of a small portion of the: mine which <br />will be located between the South Branch and St. Vrain River. The new mine areas are located south <br />of areas that are currently and have historically been mined by WMI and others. <br />As part of the mining process, both unlined ponds and lined ponds will be created. The new unlined <br />ponds will be in hydraulic connection with the remaining alluvium and stream; lined ponds will <br />serve as storage reservoirs and will not be in connection with the alluvium and stream. The mining <br />plan includes features that will help minimize impacts to the ground water and surface water systems <br />resulting from the mining operations. These featrres include: compacted shale slopes around <br />portions of the mined boundaries or a slurry wall which will impede ground water flow to the pits, <br />and recharge structures which will help to provide a rechazge source to the ground waiter system in <br />the vicinity of existing water supply wells. Furthermore, during dewatering of pits In the vicinity <br />of riparian azeas, the discharge water from the pit may be used to irrigate and rechar€;e these areas, <br />to prevent any negative impacts. <br />7- <br />/ii</ap-llniL/~u.ic,ai id/n. lo.. <br />