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<br />EXHIBIT D: Mining Plan <br />High Flume Gravel Pit <br />The High Flume Gravel Pit is currently operating under a Limited Impact 110, permit M- <br />90-093, and located in south central La Plata County, Colorado. The current permit <br />allows for the mining of 9.8 acres. The owner, High Flume Gravel Pit Inc., and the <br />operator, Flint energy construction would like to convert this pit to a Regular 112 <br />Operations permit, allowing for a total of 43.06 acres of permitted area, 23.41 acres of <br />which will be mined. This conversion will bring the current operations into compliance <br />with Colorado Division of Minerals and Geology standards by incorporating increased <br />acreage and new mining techniques, specifically the method of transporting the mined <br />product [hough a pipe to a stock pile area, as well a few other changes. <br />The High Flume pit is a currently active surface mining operation utilizing bulldozers, <br />paddle wheel scrapers and trackhoes. Topsoil will be removed to a depth of between 0- <br />12", or greater, depending on the depth, and stockpiled on site for future reclamation. <br />Red clay overburden ranges between 1'-10', and will be removed and stockpiled on site <br />for use in reclamation. Both the topsoil and the overburden stockpiles will be seeded to <br />prevent erosion and weed infestation if left undisturbed for longer than one year. <br />Compacting and or mulching may be utilized if necessary to aid in stockpile protection. <br />The gravel deposit to be mined after the overburden and topsoil is removed is <br />approximately 50' deep, for a total mined depth of approximately 60'-6S. Frontloaders <br />will feed a crusher which will process the material into a finished product which will be <br />used to construct roads, well pads, and for other similar uses. The gravel deposit is on a <br />hilltop at a much higher elevation than the stockpile area. The aggregate will be <br />conveyed from the crusher to a large metal pipe, approximately 30" in diameter, and <br />dumped into the pipe opening. The pipe will transport the product down a hill and <br />deposit it in a stockpile at the base of the hill. This pipe may be replaced a[ some point in <br />the future with a conveyor, or other similar system which will be located within the <br />proposed affected permit area. Frontloaders will remove the pile below the lower <br />opening of the pipe and integrate [his product into the stockpiles. End dumps and belly <br />dumps will be loaded from these stockpiles by frontloaders and transport the material to <br />its end use destination. A secondary material, the red clay overburden, will also be mined <br />for use in road and well pad construction, and will be handled in a fashion similar to the <br />gravel. <br />It may be occasionally necessary to temporarily stockpile the product on the upper part of <br />the mine near the crusher due to equipment issues. If this becomes necessary the product <br />may be loaded into haul vehicles directly from this stockpile in a fashion similar to <br />loading down below. Haul vehicles will access this upper stockpile utilizing an existing <br />road to the top of the hill which is used by mining personnel to access the area of <br />operations. Much of this road will remain post mining to provide access for the property <br />owner. <br />The pit floor will be sloped, and berms will be used as necessary to prevent surface water <br />runoff from impacting natural drainages by containing stotmwa[er on site. <br />