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stockpiled material slopes may be steeper, as they are temporary. All slopes will be maintained for site <br /> safety and to minimize material erosion. Excavated mine slopes will be backfilled against with backfill <br /> material and no mine slopes will remain. Mining of the aggregate material will progress down to the <br /> underlying shale bedrock. <br /> SOUTH PLATTE RIVER <br /> tC; <br /> i A N <br /> Mine Phase 1 R� l <br /> dmtnNlE � r <br /> L_ <br /> Mae1� 3 C <br /> W. <br /> c W <br /> W <br /> 1 <br /> l:� � W' --- --- NO MINING <br /> d <br /> THIS AREA o NO MINING <br /> a THIS AREA <br /> Ph 18tK <br /> 2 <br /> i p <br /> f <br /> 1 <br /> w <i <br /> Comm <br /> Asphalt <br /> i S11LES MINING RESOURCE <br /> 1. - <br /> erntlon Mine Phase,Mine Block and <br /> Mining Direction <br /> —_ w �, �� f•r Revision 10/18/2022 <br /> MINING DIAGRAM — Mine Phase, Mine Block and Mining Direction <br /> 6. Dewatering trenches, pump basins, ditches, lay flat hose and pumps will be installed prior to the <br /> excavation of aggregate material from any mine block.The mine phase and blocks will include <br /> the dewatering trenches around the perimeter that will be placed at the toe of each <br /> successive 31-1:1V mining slope. The aggregate material is ±36 feet deep. As a mine <br /> block is mined deeper, the dewatering trench will be lowered and moved laterally along the <br /> ±3H:1V slope and then the material will be dewatered to help dry the raw aggregate material in <br /> the center of the block which will be excavated and removed from the pit.We are planning to <br /> mine and dewater each block in three lifts.The excavated raw aggregate material will be <br /> temporarily stockpiled near the portable aggregate processing equipment sites. Lay flat hose <br /> will cross 35th Avenue in steel casing for traffic crossings at various locations to accommodate <br /> the neighbors light vehicle traffic. 35th Avenue is not used by the general public and access will <br /> be limited to specific individuals and companies. When the aggregate material is processed, <br /> then it is available for sale,further processing at the wet plant or to be used by the asphalt hot <br /> plant as a part of the hot bituminous asphalt paving material. <br /> H:\Pits HBP Plants\EVANS\Evans Mining Resource\DRMS Adequacy Revisions\Exh D Mine Plan Rev 101822.docx <br />