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EXHIBIT D MINING PLAN (cont) <br /> After the various clays are brought out of the pit, they are <br /> screened to remove material that is too large. The clays are then <br /> stored in segregated piles so when the offsite brick plant calls <br /> for various amounts of each clay, they can be loaded out quickly. <br /> The coarse rock screened out of the clay is saved and sold as <br /> landscaping material. The fines are saved and will be used for <br /> constructing the compacted slopes . <br /> Since mining progresses down the dip of the clay beds as <br /> well as north and south along the strike (see Exhibit C3-Mining <br /> Plan Map and Sketches 1 and 2) , the floor of the pit is always <br /> clay (a relatively impermeable material) . As a result, rainwater <br /> and rain runoff water will not drain out of the pit and must be <br /> pumped into the pre-1981 pond located to the south of the current <br /> clay pit . As amended, part of this pond will be located within <br /> the permit boundary of the Rocky Flats Pit . No aquifer is <br /> penetrated by this operation. The operator does not expect any <br /> disturbance to the prevailing hydrologic balance of the affected <br /> land. There is no water used in the clay mining or processing <br /> operations. <br /> The operator believes there is clay left in the area under <br /> the eastern side that is covered by gravel. The presence of these <br /> clay beds and the quality of the clay can only be confirmed when <br /> the overlying materials are removed. This will occur when <br /> aggregate mining has removed the sand and gravel cover on the <br /> east side of the mine. If additional clay beds are found, the <br /> operator may mine these beds and the final floor of the mine may <br /> be much lower than shown on the Reclamation Map. With the removal <br /> of the alluvium, mining in the clay beds and sandstone may exceed <br /> 120 feet in depth from the current surface. This estimate is <br /> based on the width of the exposed clay beds and the dip of the <br /> clay deposit. A revised, as-built Reclamation Map showing the <br /> final configuration of the mine floor will be submitted to the <br /> Division as a Technical Revision when mining ends. <br /> No clearly defined phases for clay mining or reclamation <br /> will be established due to the unknown nature of the clay seams <br /> to the east . The clay will generally be mined from west to east <br /> across the site. <br /> Sometimes hard spots of clay or sandstone are encountered <br /> during mining which cannot be reduced by ripping or other <br /> equipment methods . As a result, they must be blasted so that work <br /> can continue. Blasting is done using an explosives contractor and <br /> occurs one to five times per year as needed. <br /> Lakewood Brick and Tile CO Church Pit- M-1979-045 <br /> Amendment 02 April 16, 2025 <br /> 12 <br />