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EXHIBIT D MINING PLAN(coNT) <br /> progression with mining, and in some cases the stripped topsoil <br /> will be placed on areas where grading and shaping are complete so <br /> it only has to be handled once . In Phases 1 and 2 , all topsoil <br /> storage piles will be located as far from the river as practical, <br /> and will run parallel to the river' s flow if located in the <br /> floodplain. <br /> During the stripping, a slurry wall pad will be built around <br /> the reservoir Phase mining area using the excess topsoil and <br /> overburden. When the slurry wall pad has been completed, the <br /> bentonite slurry wall construction will begin. This is done by <br /> excavating a trench in the pad that is keyed into the underlying <br /> bedrock and filled with a mix of overburden, bentonite and water to <br /> create the slurry that becomes the liner. The overburden not used <br /> in slurry wall construction will be placed in the disposal areas or <br /> sold. <br /> After the slurry wall liner is place within a phase, a <br /> dewatering trench will be excavated. Then a pump will be installed <br /> and dewatering will begin. This will allow the area within the <br /> slurry wall to be dry mined. The trench will be extended around <br /> the area as mining progresses . <br /> The active mining area in the reservoir phase will remain dry. <br /> After mining is completed, final reclamation of the phase can be <br /> completed, including liner certification, final grading of slopes <br /> and initial seeding for revegetation. At this time, the reservoir <br /> will be turned over to the owners . They will be overseeing <br /> construction to complete the reservoir operations facilities and <br /> filling. As mentioned previously, any developed water storage <br /> facility construction that the landowners complete falls under <br /> Reclamation Option B and L.G. Everist will file a Technical <br /> Revision to incorporate the changes . <br /> Dewatering as mining progresses facilitates early testing of <br /> the slurry wall liner, which is required to receive liner approval <br /> certification from the State Engineer' s office . <br /> In general, mining will commence in the south end of each <br /> Phase and work north (except for Phase 1, where mining will start <br /> in the north and progress south) . As noted above, the Alpha suffix <br /> stages will be mined first in each general area to provide areas <br /> for disposal of excess overburden and processing fines generated <br /> from the mine . <br /> The working face will be mined near vertical to maximize <br /> removal of material from the mine . At its widest point, the <br /> working face will be approximately 2600 feet long. If mining ends <br /> prematurely, this working face slope will be reclaimed using a <br /> cut/fill sloping method instead of backfilling. As mining reaches <br /> the vertical face setbacks limits around each reservoir, mining in <br /> L G Evenst, Inc Ragsdale Reservoirs May 5,2020 <br /> 11 <br />