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6. Mine Phase 2 and 3-Typically,the mining of each mine phase and block will progress <br /> beginning at the outer edge of the block where material will be moved toward the interior of <br /> the block to allow for excavation of the exterior perimeter and slope. The mining slope is <br /> set up for the entire perimeter of the block in 6 to 12 feet lifts. Depending on the soil conditions <br /> met during mining,the excavation face may adjust between a 1H:1V and 3H:1V slope to <br /> bedrock.Temporary excavation slopes and temporary stockpiled material slopes may be <br /> steeper,as they are temporary.All slopes will be maintained for site safety and to minimize <br /> material erosion. Excavated mine slopes will be backfilled against with backfill material and no <br /> mine slopes will remain. Mining of the aggregate material will progress down to the underlying <br /> shale bedrock. <br /> 7. Mine Phase 4 will include striping and stockpiling of the topsoil and overburden prior to mining. <br /> Topsoil will be stored in phase 4, mine block 4d. No other operations will take place in phase 4 <br /> until mining is approaching completion in phase 3, otherwise operations will follow the above <br /> description for Mine Phase 2 and 3. <br /> S M KATM MM <br /> rr�rb.grz, ir�on.�.- 1 <br /> _ w w w w - - w --a-i -4-r -- - -- - <br /> ja <br /> PhgeA_ lllYe4 <br /> 8 <br /> - -- -- --- -- - - - - - <br /> >I< <br /> _— _ d 91i4lll��p <br /> lIOTPU1gIgglfE s — _—— — ` — w —_ <br /> WnePlrreg oYaaYxia <br /> MBte81o0cJs, awimagaras � i <br /> WFTPIAMg1gE <br /> !h1llKJp <br /> niraalon of <br /> ►+Yang OM a <br /> - -•,fit' .a.�3"t��` d_ 2�s#:, ._ -._. <br /> MINING DIAGRAM — Mine Phase, Mine Block and Mining Direction <br /> 8. Dewatering trenches, pump basins,ditches,and pumps will be installed prior to the excavation <br /> of aggregate material from any mine block.All mine phases and blocks will include the <br /> dewatering trenches around the perimeter that will be placed at the toe of each successive <br /> 3H:1V mining slope. The aggregate material is ±36 feet deep. As a mine block is mined <br /> deeper, the dewatering trench will be lowered and moved laterally along the t3H:1V slope <br /> HAPlts HBP Plants\EVANS\Stiles Mining Resource\Exh D-Mine Plan\Mine Plan Draft.do" <br />